:root {
    --python-navy: #0d1b2a;
    --python-heading: #153b6f;
    --python-blue: #2563eb;
    --python-blue-dark: #1d4ed8;
    --python-blue-soft: #eff6ff;
    --python-gold: #d4af37;
    --python-gold-light: #f5d76e;
    --python-green: #16a34a;
    --python-green-soft: #ecfdf5;
    --python-orange: #d97706;
    --python-purple: #7c3aed;
    --python-text: #1e293b;
    --python-muted: #64748b;
    --python-border: #dbe4f0;
    --python-background: #f5f7fb;
    --python-surface: #ffffff;
    --python-code: #07111f;
}

html,
body.python-page {
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

body.python-page {
    margin: 0;
    background: var(--python-background);
    color: var(--python-text);
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.65;
}

.python-page *,
.python-page *::before,
.python-page *::after {
    box-sizing: border-box;
}

.python-page [hidden] {
    display: none !important;
}

.python-page a {
    text-underline-offset: 3px;
}

.python-page code,
.python-page pre {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

/* Header */
.python-page .top-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 72px;
    padding: 0 34px;
    border-bottom: 2px solid var(--python-gold);
    background: var(--python-navy);
    box-shadow: 0 4px 16px rgba(13, 27, 42, 0.18);
}

.python-page .top-header .logo {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
    min-width: 0;
    height: 72px;
    color: #ffffff;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 29px;
    font-weight: 700;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.python-page .main-logo {
    display: block;
    width: 72px;
    height: 72px;
    margin-right: 10px;
    object-fit: contain;
}

.python-page .brand-name {
    display: inline-flex;
    align-items: center;
}

.python-page .logo-code {
    color: #b8d8f0;
    -webkit-text-fill-color: #b8d8f0;
}

.python-page .logo-bhavya {
    color: var(--python-gold);
    background: linear-gradient(90deg, #d4af37, #f5d76e, #d4af37);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.python-page .top-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
}

.python-page .top-nav a {
    position: relative;
    padding: 9px 11px;
    border-radius: 7px;
    color: #e5e7eb;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.2s ease, background 0.2s ease;
}

.python-page .top-nav a::after {
    content: "";
    position: absolute;
    right: 11px;
    bottom: 3px;
    left: 11px;
    height: 2px;
    background: var(--python-gold);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

.python-page .top-nav a:hover,
.python-page .top-nav a.active {
    color: var(--python-gold-light);
    background: rgba(212, 175, 55, 0.08);
}

.python-page .top-nav a:hover::after,
.python-page .top-nav a.active::after {
    transform: scaleX(1);
}

/* Documentation layout and sidebar */
.python-page .docs-layout {
    display: flex;
    width: 100%;
    min-height: calc(100vh - 72px);
    margin: 0;
}

.python-page .sidebar {
    position: sticky;
    top: 72px;
    z-index: 30;
    align-self: flex-start;
    width: 290px;
    height: calc(100vh - 72px);
    flex: 0 0 290px;
    padding: 18px 14px 26px;
    overflow-y: auto;
    border-right: 1px solid var(--python-border);
    background: #ffffff;
    scrollbar-color: #cbd5e1 transparent;
    scrollbar-width: thin;
}

.python-page .sidebar::-webkit-scrollbar {
    width: 6px;
}

.python-page .sidebar::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: #cbd5e1;
}

.python-page .sidebar > .sidebar-title:first-child {
    margin: 0 0 14px;
    padding: 12px 14px;
    border-left: 4px solid var(--python-gold);
    border-radius: 10px;
    background: #f8fafc;
    color: var(--python-navy);
    font-size: 17px;
    font-weight: 800;
}

.python-page .python-search-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.python-page .search-box {
    width: 100%;
    margin: 0 0 14px;
    padding: 11px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 9px;
    background: #ffffff;
    color: #334155;
    font: inherit;
    font-size: 13px;
}

.python-page .search-box:focus {
    border-color: var(--python-blue);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.python-page .python-course-home,
.python-page .python-topic-link {
    display: flex;
    align-items: center;
    min-height: 42px;
    margin: 3px 0;
    padding: 9px 12px;
    border-left: 3px solid transparent;
    border-radius: 8px;
    color: #334155;
    font-size: 13px;
    font-weight: 650;
    line-height: 1.45;
    text-decoration: none;
    transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.python-page .python-course-home:hover,
.python-page .python-topic-link:hover {
    border-left-color: var(--python-gold);
    background: #eff6ff;
    color: var(--python-blue-dark);
}

.python-page .python-course-home.active {
    border-left-color: var(--python-blue);
    background: linear-gradient(90deg, #dbeafe, #eff6ff);
    color: #123b78;
    font-weight: 800;
}

.python-page .python-topic-link.is-complete::after {
    content: "✓";
    display: grid;
    width: 19px;
    height: 19px;
    margin-left: auto;
    place-items: center;
    border-radius: 50%;
    background: #dcfce7;
    color: #15803d;
    font-size: 11px;
    font-weight: 900;
}

.python-page .sidebar .python-sidebar-group {
    margin: 20px 8px 7px;
    color: #64748b;
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.09em;
    line-height: 1.45;
    text-transform: uppercase;
}

.python-page .python-practice-link {
    border: 1px solid #fde68a;
    background: #fffbeb;
    color: #92400e;
}

.python-page .python-search-empty {
    margin: 14px 5px;
    padding: 11px;
    border-radius: 8px;
    background: #fef2f2;
    color: #991b1b;
    font-size: 12px;
    font-weight: 700;
}

.python-page .python-sidebar-toggle {
    display: none;
}

/* Main foundation */
.python-page .main-content {
    width: calc(100% - 290px);
    min-width: 0;
    max-width: none;
    padding: 32px clamp(22px, 3vw, 48px) 54px;
}

.python-page .content-card,
.python-page .content-section {
    width: 100%;
    margin: 0 0 28px;
}

.python-page .content-card {
    padding: clamp(22px, 3vw, 34px);
    border: 1px solid var(--python-border);
    border-radius: 18px;
    background: var(--python-surface);
    box-shadow: 0 9px 26px rgba(15, 23, 42, 0.045);
}

.python-page .content-card h2,
.python-page .section-heading h2 {
    margin: 4px 0 8px;
    color: var(--python-heading);
    font-size: clamp(24px, 3vw, 32px);
    line-height: 1.25;
}

.python-page .content-card p,
.python-page .section-heading p {
    margin: 6px 0 0;
    color: var(--python-muted);
}

.python-page .section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
}

.python-page .section-label,
.python-page .subject-label {
    color: #b98400;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

/* Hero */
.python-page .python-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
    gap: clamp(28px, 4vw, 58px);
    margin: 0 0 28px;
    padding: clamp(30px, 4vw, 58px);
    overflow: hidden;
    border: 1px solid #dbeafe;
    border-radius: 22px;
    background:
        radial-gradient(circle at 8% 5%, rgba(37, 99, 235, 0.12), transparent 30%),
        radial-gradient(circle at 93% 90%, rgba(212, 175, 55, 0.14), transparent 28%),
        linear-gradient(135deg, #ffffff, #f8fbff);
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.07);
}

.python-page .python-hero::after {
    content: "</>";
    position: absolute;
    right: 4%;
    bottom: -62px;
    color: rgba(37, 99, 235, 0.04);
    font: 900 190px/1 monospace;
    pointer-events: none;
}

.python-page .python-hero-copy,
.python-page .python-hero-code {
    position: relative;
    z-index: 1;
}

.python-page .python-hero .page-title {
    max-width: 760px;
    margin: 13px 0 14px;
    color: var(--python-navy);
    font-size: clamp(34px, 5vw, 55px);
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.python-page .python-hero .page-description {
    max-width: 760px;
    margin: 0;
    color: #475569;
    font-size: 16px;
    line-height: 1.75;
}

.python-page .python-hero .page-description code {
    padding: 2px 6px;
    border-radius: 5px;
    background: #e0ecff;
    color: #1d4ed8;
    font-size: 0.9em;
    font-weight: 700;
}

.python-page .python-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 11px;
    margin-top: 24px;
}

.python-page .python-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: 10px;
    font: inherit;
    font-size: 13px;
    font-weight: 800;
    line-height: 1.3;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.python-page .python-button:hover {
    transform: translateY(-2px);
}

.python-page .python-button-primary {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    box-shadow: 0 7px 18px rgba(37, 99, 235, 0.2);
}

.python-page .python-button-secondary {
    border-color: #bfdbfe;
    background: #ffffff;
    color: #1d4ed8;
}

.python-page .python-hero-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 9px;
    margin-top: 28px;
}

.python-page .python-hero-stats div {
    min-width: 0;
    padding: 11px;
    border: 1px solid #dbeafe;
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.82);
}

.python-page .python-hero-stats strong,
.python-page .python-hero-stats span {
    display: block;
}

.python-page .python-hero-stats strong {
    color: var(--python-heading);
    font-size: 17px;
}

.python-page .python-hero-stats span {
    margin-top: 2px;
    color: #64748b;
    font-size: 10px;
    font-weight: 750;
}

.python-page .python-hero-code {
    align-self: center;
    overflow: hidden;
    border: 1px solid #1e3a5f;
    border-radius: 17px;
    background: var(--python-code);
    box-shadow: 0 22px 44px rgba(15, 23, 42, 0.24);
}

.python-page .python-code-window-bar,
.python-page .python-lab-toolbar,
.python-page .python-output-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 45px;
    padding: 10px 15px;
    border-bottom: 1px solid #24364e;
    background: #101d31;
    color: #cbd5e1;
    font-size: 11px;
    font-weight: 750;
}

.python-page .python-window-dots {
    display: flex;
    gap: 6px;
}

.python-page .python-window-dots i {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #fb7185;
}

.python-page .python-window-dots i:nth-child(2) {
    background: #fbbf24;
}

.python-page .python-window-dots i:nth-child(3) {
    background: #4ade80;
}

.python-page .python-version {
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.16);
    color: #93c5fd;
}

.python-page .python-hero-code pre {
    min-height: 280px;
    margin: 0;
    padding: 25px;
    overflow: auto;
    color: #dbeafe;
    font-size: 13px;
    line-height: 1.9;
    white-space: pre-wrap;
}

.python-page .py-comment { color: #64748b; }
.python-page .py-string { color: #fbbf24; }
.python-page .py-keyword { color: #c084fc; }
.python-page .py-function { color: #60a5fa; }

.python-page .python-code-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 14px 18px;
    border-top: 1px solid #24364e;
    background: #0b1728;
}

.python-page .python-code-result span {
    color: #64748b;
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.python-page .python-code-result strong {
    color: #4ade80;
    font-family: monospace;
    font-size: 12px;
}

/* Progress and welcome */
.python-page .python-progress-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
    align-items: center;
    gap: 34px;
    background: linear-gradient(120deg, #ffffff, #f8fbff);
}

.python-page .python-progress-summary {
    padding: 18px;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    background: #ffffff;
}

.python-page .python-progress-number {
    display: flex;
    align-items: baseline;
    gap: 7px;
}

.python-page .python-progress-number strong {
    color: var(--python-blue);
    font-size: 30px;
}

.python-page .python-progress-number span {
    color: #64748b;
    font-size: 12px;
    font-weight: 700;
}

.python-page .python-progress-track {
    height: 11px;
    margin: 12px 0;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

.python-page #pythonProgressBar {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #2563eb, #f5c542);
    transition: width 0.3s ease;
}

.python-page .python-progress-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: #334155;
    font-size: 12px;
}

.python-page #pythonResetProgress {
    padding: 5px 0;
    border: 0;
    background: transparent;
    color: #64748b;
    font: inherit;
    font-size: 11px;
    font-weight: 750;
    text-decoration: underline;
    cursor: pointer;
}

.python-page .python-welcome-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    border-left: 5px solid var(--python-gold);
}

.python-page .python-welcome-icon {
    display: grid;
    width: 54px;
    height: 54px;
    flex: 0 0 54px;
    place-items: center;
    border-radius: 15px;
    background: #fffbeb;
    font-size: 27px;
}

/* Path and levels */
.python-page .python-path-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 17px;
}

.python-page .python-path-card {
    position: relative;
    min-height: 355px;
    overflow: hidden;
    padding: 26px;
    border: 1px solid var(--python-border);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.045);
}

.python-page .python-path-card::after {
    content: "";
    position: absolute;
    right: -32px;
    bottom: -32px;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.05);
}

.python-page .python-path-card > span {
    color: var(--python-blue);
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.09em;
}

.python-page .python-path-icon {
    margin: 20px 0 12px;
    font-size: 35px;
}

.python-page .python-path-card h3 {
    margin: 0 0 10px;
    color: var(--python-navy);
    font-size: 21px;
}

.python-page .python-path-card p {
    min-height: 65px;
    margin: 0;
    color: #64748b;
    font-size: 13px;
}

.python-page .python-path-card ul,
.python-page .python-level-card ul {
    margin: 17px 0 0;
    padding-left: 20px;
    color: #475569;
    font-size: 12px;
}

.python-page .python-path-card li,
.python-page .python-level-card li {
    margin: 6px 0;
}

.python-page .python-path-foundations { border-top: 4px solid #2563eb; }
.python-page .python-path-solving { border-top: 4px solid #d4af37; }
.python-page .python-path-applied { border-top: 4px solid #16a34a; }

.python-page .python-level-section {
    padding-top: 12px;
    scroll-margin-top: 90px;
}

.python-page .python-level-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 17px;
}

.python-page .python-level-card {
    position: relative;
    display: flex;
    min-height: 380px;
    flex-direction: column;
    padding: 25px;
    border: 1px solid var(--python-border);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.045);
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.python-page .python-level-card:hover {
    transform: translateY(-3px);
    border-color: #93c5fd;
    box-shadow: 0 14px 32px rgba(37, 99, 235, 0.09);
}

.python-page .python-level-card.is-complete {
    border-color: #86efac;
    background: linear-gradient(150deg, #ffffff, #f0fdf4);
}

.python-page .python-level-number {
    align-self: flex-start;
    padding: 5px 9px;
    border-radius: 999px;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: 10px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.python-page .python-level-card .topic-icon {
    position: absolute;
    top: 22px;
    right: 24px;
    font-size: 30px;
}

.python-page .python-level-card h3 {
    margin: 20px 0 8px;
    color: var(--python-navy);
    font-size: 21px;
    line-height: 1.3;
}

.python-page .python-level-card h3 a {
    color: inherit;
    text-decoration: none;
}

.python-page .python-level-card h3 a:hover {
    color: var(--python-blue);
}

.python-page .python-level-card > p {
    margin: 0;
    color: #64748b;
    font-size: 13px;
}

.python-page .python-level-card code {
    color: #1d4ed8;
    font-weight: 700;
}

.python-page .python-level-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: auto;
    padding-top: 20px;
}

.python-page .python-complete-button {
    min-height: 44px;
    padding: 9px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 10px;
    background: #ffffff;
    color: #475569;
    font: inherit;
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
}

.python-page .python-complete-button[aria-pressed="true"] {
    border-color: #86efac;
    background: #dcfce7;
    color: #166534;
}

/* Starter lab */
.python-page .python-lab {
    overflow: hidden;
    border-color: #cbd5e1;
    background: #f8fafc;
}

.python-page .python-lab-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 22px;
    margin-bottom: 18px;
}

.python-page .python-lab-heading h2 {
    margin-top: 4px;
}

.python-page .python-lab-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 7px;
}

.python-page .python-lab-tabs button {
    min-height: 36px;
    padding: 7px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 999px;
    background: #ffffff;
    color: #475569;
    font: inherit;
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
}

.python-page .python-lab-tabs button[aria-selected="true"] {
    border-color: var(--python-blue);
    background: var(--python-blue);
    color: #ffffff;
}

.python-page .python-lab-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.python-page .python-lab-editor,
.python-page .python-lab-output {
    overflow: hidden;
    border: 1px solid #263852;
    border-radius: 14px;
    background: var(--python-code);
}

.python-page .python-lab-toolbar button {
    padding: 5px 9px;
    border: 1px solid #334155;
    border-radius: 6px;
    background: #17263c;
    color: #cbd5e1;
    font: inherit;
    font-size: 10px;
    font-weight: 750;
    cursor: pointer;
}

.python-page .python-lab-editor pre,
.python-page .python-lab-output > pre {
    height: 285px;
    margin: 0;
    padding: 20px;
    overflow: auto;
    color: #dbeafe;
    font-size: 13px;
    line-height: 1.75;
    white-space: pre-wrap;
}

.python-page .python-lab-output > pre {
    color: #86efac;
}

.python-page #pythonRunStatus {
    padding: 3px 8px;
    border-radius: 999px;
    background: #1e293b;
    color: #94a3b8;
}

.python-page #pythonRunStatus.is-running {
    color: #fde68a;
}

.python-page #pythonRunStatus.is-complete {
    color: #86efac;
}

.python-page .python-demo-explanation {
    min-height: 110px;
    padding: 15px 18px;
    border-top: 1px solid #24364e;
    background: #101d31;
}

.python-page .python-demo-explanation strong {
    color: #93c5fd;
    font-size: 11px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.python-page .python-demo-explanation p {
    margin: 5px 0 0;
    color: #cbd5e1;
    font-size: 12px;
}

.python-page .python-button-run {
    min-width: 170px;
    margin-top: 15px;
    background: #16a34a;
    color: #ffffff;
    box-shadow: 0 7px 18px rgba(22, 163, 74, 0.18);
}

/* Benefits and method */
.python-page .python-benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 15px;
}

.python-page .python-benefit-grid article {
    min-height: 180px;
    padding: 22px;
    border: 1px solid var(--python-border);
    border-radius: 16px;
    background: #ffffff;
}

.python-page .python-benefit-grid article > span {
    font-size: 28px;
}

.python-page .python-benefit-grid h3 {
    margin: 12px 0 7px;
    color: var(--python-navy);
    font-size: 17px;
}

.python-page .python-benefit-grid p {
    margin: 0;
    color: #64748b;
    font-size: 12px;
}

.python-page .python-learning-method {
    background:
        linear-gradient(120deg, rgba(37, 99, 235, 0.05), rgba(212, 175, 55, 0.05)),
        #ffffff;
}

.python-page .python-method-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.python-page .python-method-grid article {
    position: relative;
    padding: 19px;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.88);
}

.python-page .python-method-grid strong {
    color: #bfdbfe;
    font-size: 31px;
    line-height: 1;
}

.python-page .python-method-grid h3 {
    margin: 12px 0 5px;
    color: var(--python-heading);
    font-size: 16px;
}

.python-page .python-method-grid p {
    margin: 0;
    color: #64748b;
    font-size: 11px;
}

.python-page .python-topic-navigation {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 14px;
    margin-top: 30px;
}

.python-page .python-topic-navigation a {
    display: flex;
    align-items: center;
    min-height: 56px;
    max-width: 48%;
    padding: 13px 18px;
    border: 1px solid var(--python-border);
    border-radius: 12px;
    background: #ffffff;
    color: var(--python-heading);
    font-size: 13px;
    font-weight: 800;
    text-decoration: none;
}

.python-page .python-topic-navigation .next-topic {
    margin-left: auto;
    border-color: #bfdbfe;
    background: #eff6ff;
    color: #1d4ed8;
    text-align: right;
}

/* Footer */
.python-page .footer {
    width: 100%;
    margin: 0;
    border-top: 3px solid var(--python-gold);
    background: var(--python-navy);
    color: #cbd5e1;
}

.python-page .footer-container {
    display: grid;
    grid-template-columns: 1.45fr repeat(3, 1fr);
    gap: 38px;
    width: min(1200px, calc(100% - 48px));
    margin: 0 auto;
    padding: 42px 0 34px;
}

.python-page .footer-brand {
    font: 700 28px/1 Georgia, "Times New Roman", serif;
}

.python-page .footer-code { color: #b8d8f0; }
.python-page .footer-bhavya { color: var(--python-gold-light); }

.python-page .footer-tagline {
    margin: 13px 0 5px;
    color: var(--python-gold-light);
    font-weight: 800;
}

.python-page .footer-description {
    max-width: 330px;
    margin: 0;
    color: #94a3b8;
    font-size: 12px;
}

.python-page .footer-column h3 {
    margin: 0 0 13px;
    color: #ffffff;
    font-size: 14px;
}

.python-page .footer-column a {
    display: block;
    margin: 8px 0;
    color: #cbd5e1;
    font-size: 12px;
    text-decoration: none;
}

.python-page .footer-column a:hover {
    color: var(--python-gold-light);
}

.python-page .footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    width: min(1200px, calc(100% - 48px));
    margin: 0 auto;
    padding: 17px 0;
    border-top: 1px solid #26384d;
    color: #94a3b8;
    font-size: 11px;
}

.python-page .footer-bottom p {
    margin: 0;
}

/* Search states */
.python-page .python-level-card.is-search-hidden,
.python-page .python-topic-link.is-search-hidden,
.python-page .python-level-section.is-search-hidden,
.python-page .sidebar .python-sidebar-group.is-search-hidden {
    display: none !important;
}

.python-page .python-level-card.is-search-match {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
}

/* Responsive */
@media (max-width: 1180px) {
    .python-page .top-header {
        padding: 0 18px;
    }

    .python-page .top-nav {
        max-width: calc(100vw - 250px);
        overflow-x: auto;
        scrollbar-width: none;
    }

    .python-page .top-nav::-webkit-scrollbar {
        display: none;
    }

    .python-page .sidebar {
        width: 260px;
        flex-basis: 260px;
    }

    .python-page .main-content {
        width: calc(100% - 260px);
        padding-right: 25px;
        padding-left: 25px;
    }

    .python-page .python-hero {
        grid-template-columns: 1fr;
    }

    .python-page .python-hero-code {
        max-width: 760px;
    }

    .python-page .python-path-grid,
    .python-page .python-benefit-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .python-page .python-path-card:last-child {
        grid-column: 1 / -1;
        min-height: 0;
    }

    .python-page .python-lab-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .python-page .python-lab-tabs {
        justify-content: flex-start;
    }

    .python-page .python-method-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 880px) {
    .python-page .top-header {
        position: relative;
        min-height: auto;
        padding: 0 16px 12px;
        flex-wrap: wrap;
    }

    .python-page .top-header .logo {
        height: 66px;
        font-size: 25px;
    }

    .python-page .main-logo {
        width: 62px;
        height: 62px;
    }

    .python-page .top-nav {
        width: 100%;
        max-width: none;
        justify-content: flex-start;
    }

    .python-page .python-sidebar-toggle {
        position: sticky;
        top: 0;
        z-index: 900;
        display: block;
        width: 100%;
        min-height: 45px;
        padding: 10px 18px;
        border: 0;
        border-bottom: 1px solid #cbd5e1;
        background: #ffffff;
        color: var(--python-heading);
        font: inherit;
        font-size: 13px;
        font-weight: 850;
        text-align: left;
        cursor: pointer;
    }

    .python-page .docs-layout {
        position: relative !important;
        display: block !important;
        width: 100% !important;
        min-height: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
        inset: auto !important;
        transform: none !important;
    }

    .python-page .docs-layout > .sidebar {
        position: fixed !important;
        top: 45px !important;
        right: auto !important;
        bottom: 0 !important;
        left: 0 !important;
        z-index: 850 !important;
        width: min(330px, 88vw) !important;
        min-width: 0 !important;
        height: calc(100vh - 45px) !important;
        max-height: none !important;
        margin: 0 !important;
        float: none !important;
        transform: translateX(-105%);
        box-shadow: 12px 0 30px rgba(15, 23, 42, 0.16);
        transition: transform 0.22s ease;
    }

    .python-page .sidebar.is-open {
        transform: translateX(0);
    }

    .python-page .docs-layout > .main-content {
        position: relative !important;
        display: block !important;
        top: auto !important;
        right: auto !important;
        bottom: auto !important;
        left: auto !important;
        width: 100% !important;
        min-width: 0 !important;
        max-width: none !important;
        min-height: 0 !important;
        margin: 0 !important;
        padding: 24px 18px 45px !important;
        float: none !important;
        transform: none !important;
    }

    .python-page .python-progress-card,
    .python-page .python-lab-grid {
        grid-template-columns: 1fr;
    }

    .python-page .python-level-grid {
        grid-template-columns: 1fr;
    }

    .python-page .footer-container {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 620px) {
    .python-page .top-header {
        padding-right: 10px;
        padding-left: 10px;
    }

    .python-page .top-header .logo {
        font-size: 22px;
    }

    .python-page .main-logo {
        width: 55px;
        height: 55px;
        margin-right: 5px;
    }

    .python-page .top-nav a {
        padding: 8px 9px;
        font-size: 12px;
    }

    .python-page .docs-layout > .main-content {
        padding: 18px 12px 40px !important;
    }

    .python-page .python-hero,
    .python-page .content-card,
    .python-page .python-level-card {
        padding: 20px;
        border-radius: 15px;
    }

    .python-page .python-hero .page-title {
        font-size: 34px;
    }

    .python-page .python-hero-stats,
    .python-page .python-path-grid,
    .python-page .python-benefit-grid,
    .python-page .python-method-grid {
        grid-template-columns: 1fr;
    }

    .python-page .python-path-card:last-child {
        grid-column: auto;
    }

    .python-page .python-hero-code pre {
        min-height: 0;
        padding: 17px;
        font-size: 11px;
    }

    .python-page .python-progress-footer,
    .python-page .python-welcome-card,
    .python-page .python-topic-navigation,
    .python-page .footer-bottom {
        align-items: stretch;
        flex-direction: column;
    }

    .python-page .python-welcome-icon {
        width: 48px;
        height: 48px;
        flex-basis: 48px;
    }

    .python-page .python-level-actions,
    .python-page .python-level-actions .python-button,
    .python-page .python-level-actions .python-complete-button {
        width: 100%;
    }

    .python-page .python-topic-navigation a {
        width: 100%;
        max-width: none;
    }

    .python-page .footer-container {
        grid-template-columns: 1fr;
        width: calc(100% - 32px);
    }

    .python-page .footer-bottom {
        width: calc(100% - 32px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .python-page *,
    .python-page *::before,
    .python-page *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

/*
 * Desktop alignment safeguard
 *
 * The shared website stylesheet contains older sidebar positioning rules.
 * These Python-specific declarations keep the sidebar flush below the
 * header and aligned with the top of the main content without affecting
 * any other CodeBhavya course page.
 */
@media (min-width: 881px) {
    html,
    body.python-page {
        overflow-x: visible !important;
        overflow-y: visible !important;
    }

    .python-page .docs-layout {
        align-items: flex-start !important;
        gap: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .python-page .docs-layout > .sidebar {
        position: sticky !important;
        top: 72px !important;
        align-self: flex-start !important;
        width: 235px !important;
        min-width: 235px !important;
        height: calc(100vh - 72px) !important;
        max-height: calc(100vh - 72px) !important;
        margin: 0 !important;
        padding: 20px 12px !important;
        flex: 0 0 235px !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        border-radius: 0 !important;
        box-sizing: border-box !important;
    }

    .python-page .docs-layout > .main-content {
        width: auto !important;
        min-width: 0 !important;
        max-width: none !important;
        margin: 0 !important;
        flex: 1 1 auto !important;
        box-sizing: border-box !important;
    }
}

@media (min-width: 881px) and (max-width: 1180px) {
    .python-page .docs-layout > .sidebar {
        width: 215px !important;
        min-width: 215px !important;
        flex-basis: 215px !important;
    }
}

/* ================================================================
   PYTHON LESSON PAGES
   ================================================================ */

.python-page .python-topic-link.active {
    border-left-color: var(--python-blue);
    background: linear-gradient(90deg, #dbeafe, #eff6ff);
    color: #123b78;
    font-weight: 800;
}

.python-lesson-page .main-content {
    color: #334155;
}

.python-lesson-page .python-breadcrumb {
    display: flex;
    align-items: center;
    gap: 9px;
    margin: 0 0 18px;
    color: #64748b;
    font-size: 12px;
}

.python-lesson-page .python-breadcrumb a {
    color: var(--python-blue);
    font-weight: 750;
    text-decoration: none;
}

.python-lesson-page .python-breadcrumb strong {
    color: #475569;
}

.python-lesson-page .python-lesson-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(350px, 0.85fr);
    gap: clamp(28px, 4vw, 56px);
    margin-bottom: 28px;
    padding: clamp(30px, 4vw, 52px);
    overflow: hidden;
    border: 1px solid #cfe0fa;
    border-radius: 22px;
    background:
        radial-gradient(circle at 4% 3%, rgba(37, 99, 235, 0.14), transparent 31%),
        radial-gradient(circle at 96% 95%, rgba(212, 175, 55, 0.16), transparent 26%),
        linear-gradient(135deg, #ffffff, #f5f9ff);
    box-shadow: 0 12px 34px rgba(15, 23, 42, 0.07);
}

.python-lesson-page .python-lesson-hero::after {
    content: "01";
    position: absolute;
    right: 2%;
    bottom: -58px;
    color: rgba(37, 99, 235, 0.045);
    font: 900 205px/1 sans-serif;
    pointer-events: none;
}

.python-lesson-page .python-lesson-hero-copy,
.python-lesson-page .python-lesson-terminal {
    position: relative;
    z-index: 1;
}

.python-lesson-page .python-lesson-hero h1 {
    margin: 13px 0 14px;
    color: var(--python-navy);
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.python-lesson-page .python-lesson-hero-copy > p {
    max-width: 720px;
    margin: 0;
    color: #475569;
    font-size: 16px;
    line-height: 1.75;
}

.python-lesson-page .python-lesson-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 22px;
}

.python-lesson-page .python-lesson-meta span {
    padding: 7px 10px;
    border: 1px solid #dbeafe;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.88);
    color: #475569;
    font-size: 11px;
    font-weight: 750;
}

.python-lesson-page .python-lesson-terminal {
    align-self: center;
    overflow: hidden;
    border: 1px solid #1e3a5f;
    border-radius: 17px;
    background: var(--python-code);
    box-shadow: 0 22px 44px rgba(15, 23, 42, 0.24);
}

.python-lesson-page .python-lesson-terminal pre {
    min-height: 235px;
    margin: 0;
    padding: 25px;
    overflow: auto;
    color: #dbeafe;
    font-size: 13px;
    line-height: 1.9;
    white-space: pre-wrap;
}

.python-lesson-page .python-lesson-terminal .python-code-result strong {
    text-align: right;
}

.python-lesson-page .python-objectives {
    scroll-margin-top: 90px;
    border-top: 4px solid var(--python-blue);
}

.python-lesson-page .python-objective-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-top: 22px;
}

.python-lesson-page .python-objective-grid article {
    min-height: 140px;
    padding: 18px;
    border: 1px solid #dbeafe;
    border-radius: 13px;
    background: #f8fbff;
}

.python-lesson-page .python-objective-grid span {
    display: grid;
    width: 31px;
    height: 31px;
    place-items: center;
    border-radius: 9px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 11px;
    font-weight: 900;
}

.python-lesson-page .python-objective-grid p {
    margin: 14px 0 0;
    color: #475569;
    font-size: 13px;
    line-height: 1.6;
}

.python-lesson-page .python-objective-grid code,
.python-lesson-page .python-section-intro code,
.python-lesson-page .python-explanation-card code,
.python-lesson-page .python-note code,
.python-lesson-page .python-rule-grid code,
.python-lesson-page .python-quiz code,
.python-lesson-page .python-practice-list code {
    color: #1d4ed8;
    font-weight: 750;
}

.python-lesson-page .python-lesson-section {
    margin-bottom: 28px;
    padding: clamp(24px, 3.2vw, 38px);
    scroll-margin-top: 90px;
    border: 1px solid var(--python-border);
    border-radius: 18px;
    background: #ffffff;
    box-shadow: 0 8px 25px rgba(15, 23, 42, 0.045);
}

.python-lesson-page .python-lesson-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    padding-bottom: 18px;
    border-bottom: 1px solid #e2e8f0;
}

.python-lesson-page .python-section-number {
    display: grid;
    width: 48px;
    height: 48px;
    flex: 0 0 48px;
    place-items: center;
    border-radius: 14px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    font-size: 15px;
    font-weight: 900;
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.2);
}

.python-lesson-page .python-lesson-heading h2 {
    margin: 3px 0 0;
    color: var(--python-navy);
    font-size: clamp(24px, 3.2vw, 34px);
    line-height: 1.25;
}

.python-lesson-page .python-lesson-heading p {
    margin: 5px 0 0;
    color: #64748b;
    font-size: 13px;
}

.python-lesson-page .python-section-intro {
    margin: 0 0 20px;
    color: #475569;
    font-size: 14px;
    line-height: 1.75;
}

.python-lesson-page .python-explanation-card {
    padding: 22px;
    border-left: 5px solid var(--python-blue);
    border-radius: 13px;
    background: #eff6ff;
}

.python-lesson-page .python-explanation-card > p {
    margin: 0;
    color: #334155;
    font-size: 14px;
    line-height: 1.75;
}

.python-lesson-page .python-definition {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 14px;
    margin-top: 16px;
    padding-top: 15px;
    border-top: 1px solid #bfdbfe;
}

.python-lesson-page .python-definition span {
    color: #1d4ed8;
    font-size: 11px;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.python-lesson-page .python-definition p {
    margin: 0;
    color: #334155;
    font-size: 13px;
}

.python-lesson-page .python-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 13px;
    margin-top: 19px;
}

.python-lesson-page .python-feature-grid article {
    min-height: 182px;
    padding: 20px;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #ffffff;
}

.python-lesson-page .python-feature-grid article > span {
    font-size: 28px;
}

.python-lesson-page .python-feature-grid h3 {
    margin: 12px 0 7px;
    color: var(--python-navy);
    font-size: 16px;
}

.python-lesson-page .python-feature-grid p {
    margin: 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.65;
}

.python-lesson-page .python-use-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.python-lesson-page .python-use-grid article {
    padding: 15px;
    border: 1px solid #fde68a;
    border-radius: 11px;
    background: #fffbeb;
}

.python-lesson-page .python-use-grid strong,
.python-lesson-page .python-use-grid span {
    display: block;
}

.python-lesson-page .python-use-grid strong {
    color: #92400e;
    font-size: 12px;
}

.python-lesson-page .python-use-grid span {
    margin-top: 5px;
    color: #78716c;
    font-size: 10px;
    line-height: 1.5;
}

.python-lesson-page .python-execution-flow {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 22px 0;
}

.python-lesson-page .python-execution-flow article {
    flex: 1 1 0;
    min-width: 0;
    min-height: 145px;
    padding: 19px;
    text-align: center;
    border: 1px solid #dbeafe;
    border-radius: 14px;
    background: linear-gradient(145deg, #ffffff, #f8fbff);
}

.python-lesson-page .python-execution-flow article > span {
    display: grid;
    width: 34px;
    height: 34px;
    margin: 0 auto 12px;
    place-items: center;
    border-radius: 50%;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 900;
}

.python-lesson-page .python-execution-flow strong,
.python-lesson-page .python-execution-flow small {
    display: block;
}

.python-lesson-page .python-execution-flow strong {
    color: var(--python-navy);
    font-size: 15px;
}

.python-lesson-page .python-execution-flow small {
    margin-top: 6px;
    color: #64748b;
    font-size: 11px;
}

.python-lesson-page .python-execution-flow > b {
    flex: 0 0 auto;
    color: var(--python-gold);
    font-size: 28px;
}

.python-lesson-page .python-note {
    display: grid;
    grid-template-columns: 105px 1fr;
    gap: 14px;
    margin-top: 18px;
    padding: 16px 18px;
    border-radius: 12px;
}

.python-lesson-page .python-note strong {
    font-size: 12px;
    text-transform: uppercase;
}

.python-lesson-page .python-note p {
    margin: 0;
    color: #475569;
    font-size: 12px;
    line-height: 1.6;
}

.python-lesson-page .python-note-blue {
    border: 1px solid #bfdbfe;
    background: #eff6ff;
}

.python-lesson-page .python-note-blue strong {
    color: #1d4ed8;
}

.python-lesson-page .python-note-gold {
    border: 1px solid #fde68a;
    background: #fffbeb;
}

.python-lesson-page .python-note-gold strong {
    color: #92400e;
}

.python-lesson-page .python-choice-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.python-lesson-page .python-choice-grid article {
    position: relative;
    min-height: 320px;
    padding: 24px;
    border: 1px solid #e2e8f0;
    border-radius: 15px;
    background: #ffffff;
}

.python-lesson-page .python-choice-grid article.recommended {
    border-color: #93c5fd;
    background: linear-gradient(150deg, #ffffff, #eff6ff);
    box-shadow: 0 9px 24px rgba(37, 99, 235, 0.08);
}

.python-lesson-page .python-choice-badge {
    color: #1d4ed8;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.python-lesson-page .python-choice-grid h3 {
    margin: 15px 0 9px;
    color: var(--python-navy);
    font-size: 19px;
}

.python-lesson-page .python-choice-grid p,
.python-lesson-page .python-choice-grid ol {
    color: #64748b;
    font-size: 12px;
    line-height: 1.65;
}

.python-lesson-page .python-choice-grid ol {
    margin: 17px 0 0;
    padding-left: 20px;
}

.python-lesson-page .python-choice-grid li {
    margin: 5px 0;
}

.python-lesson-page .python-choice-grid code {
    color: #1d4ed8;
    font-weight: 750;
}

.python-lesson-page .python-example-card {
    margin-top: 18px;
    overflow: hidden;
    border: 1px solid #cbd5e1;
    border-radius: 15px;
    background: #f8fafc;
}

.python-lesson-page .python-example-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 14px 17px;
    border-bottom: 1px solid #cbd5e1;
    background: #ffffff;
}

.python-lesson-page .python-example-title span {
    color: var(--python-blue);
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.09em;
}

.python-lesson-page .python-example-title h3 {
    margin: 3px 0 0;
    color: var(--python-navy);
    font-size: 16px;
}

.python-lesson-page .python-copy-button,
.python-lesson-page .python-reveal-button {
    min-height: 35px;
    padding: 7px 12px;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    background: #eff6ff;
    color: #1d4ed8;
    font: inherit;
    font-size: 10px;
    font-weight: 850;
    cursor: pointer;
}

.python-lesson-page .python-copy-button:hover,
.python-lesson-page .python-reveal-button:hover {
    border-color: var(--python-blue);
    background: #dbeafe;
}

.python-lesson-page .python-example-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(230px, 0.75fr);
}

.python-lesson-page .python-code-block {
    margin: 0;
    padding: 20px;
    overflow: auto;
    border: 0;
    border-radius: 0;
    background: var(--python-code);
    color: #dbeafe;
    font-size: 12px;
    line-height: 1.75;
    white-space: pre-wrap;
}

.python-lesson-page .python-example-output {
    min-height: 150px;
    padding: 20px;
    border-left: 1px solid #263852;
    background: #0b1728;
}

.python-lesson-page .python-example-output > span {
    color: #64748b;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.1em;
}

.python-lesson-page .python-example-output pre {
    margin: 14px 0 0;
    color: #86efac;
    font-size: 12px;
    line-height: 1.75;
    white-space: pre-wrap;
}

.python-lesson-page .python-syntax-breakdown {
    margin: 20px 0;
    padding: 26px;
    border: 1px solid #dbeafe;
    border-radius: 15px;
    background: #f8fbff;
}

.python-lesson-page .python-syntax-code {
    padding: 24px;
    text-align: center;
    border-radius: 12px;
    background: var(--python-code);
    font: 750 clamp(21px, 4vw, 34px)/1.4 monospace;
}

.python-lesson-page .syntax-function { color: #60a5fa; }
.python-lesson-page .syntax-paren { color: #fbbf24; }
.python-lesson-page .syntax-string { color: #86efac; }

.python-lesson-page .python-syntax-labels {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 15px;
}

.python-lesson-page .python-syntax-labels > span {
    display: grid;
    grid-template-columns: 10px 1fr;
    column-gap: 8px;
    padding: 12px;
    border-radius: 9px;
    background: #ffffff;
}

.python-lesson-page .python-syntax-labels i {
    width: 8px;
    height: 8px;
    margin-top: 4px;
    border-radius: 50%;
}

.python-lesson-page .python-syntax-labels i.blue { background: #60a5fa; }
.python-lesson-page .python-syntax-labels i.gold { background: #fbbf24; }
.python-lesson-page .python-syntax-labels i.green { background: #22c55e; }

.python-lesson-page .python-syntax-labels strong,
.python-lesson-page .python-syntax-labels small {
    grid-column: 2;
}

.python-lesson-page .python-syntax-labels strong {
    color: #334155;
    font-size: 11px;
}

.python-lesson-page .python-syntax-labels small {
    margin-top: 2px;
    color: #64748b;
    font-size: 9px;
}

.python-lesson-page .python-trace-card {
    margin-top: 20px;
    padding: 22px;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #ffffff;
}

.python-lesson-page .python-trace-card h3 {
    margin: 4px 0 15px;
    color: var(--python-navy);
}

.python-lesson-page .python-table-wrap {
    overflow-x: auto;
}

.python-lesson-page .python-table-wrap table {
    width: 100%;
    border-collapse: collapse;
    font-size: 11px;
}

.python-lesson-page .python-table-wrap th,
.python-lesson-page .python-table-wrap td {
    padding: 12px;
    text-align: left;
    border: 1px solid #e2e8f0;
    vertical-align: top;
}

.python-lesson-page .python-table-wrap th {
    background: #eff6ff;
    color: #1e3a5f;
    font-size: 10px;
    text-transform: uppercase;
}

.python-lesson-page .python-table-wrap code {
    color: #1d4ed8;
    font-weight: 700;
}

.python-lesson-page .python-rule-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.python-lesson-page .python-rule-grid article {
    position: relative;
    min-height: 210px;
    padding: 22px;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #ffffff;
}

.python-lesson-page .python-rule-grid article > span {
    position: absolute;
    top: 18px;
    right: 18px;
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border-radius: 50%;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-rule-grid h3 {
    margin: 0 38px 14px 0;
    color: var(--python-navy);
    font-size: 15px;
}

.python-lesson-page .python-rule-grid pre,
.python-lesson-page .python-compare-grid pre {
    margin: 0;
    padding: 16px;
    overflow: auto;
    border-radius: 9px;
    background: var(--python-code);
    color: #dbeafe;
    font-size: 11px;
    line-height: 1.65;
    white-space: pre-wrap;
}

.python-lesson-page .python-rule-grid p {
    color: #64748b;
    font-size: 11px;
}

/* Text labels used by the Level 12 complexity cards */
.python-lesson-page .python-complexity-grid article {
    padding-top: 22px;
}

.python-lesson-page .python-complexity-grid article > span {
    position: static !important;
    display: inline-flex !important;
    width: auto !important;
    max-width: 100%;
    height: auto !important;
    min-height: 28px;
    margin: 0 0 14px;
    padding: 5px 10px;
    place-items: initial;
    align-items: center;
    border-radius: 999px;
    line-height: 1.25;
    letter-spacing: 0.05em;
    white-space: normal;
}

.python-lesson-page .python-complexity-grid h3 {
    margin: 0 0 14px;
}

.python-lesson-page .python-compare-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.python-lesson-page .python-compare-grid article {
    padding: 20px;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #ffffff;
}

.python-lesson-page .python-compare-grid article.correct { border-top: 4px solid #22c55e; }
.python-lesson-page .python-compare-grid article.wrong { border-top: 4px solid #ef4444; }

.python-lesson-page .python-compare-grid article > span {
    display: block;
    margin-bottom: 11px;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-compare-grid article.correct > span { color: #15803d; }
.python-lesson-page .python-compare-grid article.wrong > span { color: #b91c1c; }

.python-lesson-page .python-compare-grid p {
    margin: 12px 0 0;
    color: #64748b;
    font-size: 11px;
    line-height: 1.6;
}

.python-lesson-page .python-tip-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 11px;
    margin-top: 16px;
}

.python-lesson-page .python-tip-grid article {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 10px;
    padding: 15px;
    border: 1px solid #e2e8f0;
    border-radius: 11px;
}

.python-lesson-page .python-tip-grid span {
    display: grid;
    width: 26px;
    height: 26px;
    place-items: center;
    border-radius: 50%;
    background: #dcfce7;
    color: #15803d;
    font-size: 11px;
    font-weight: 900;
}

.python-lesson-page .python-tip-grid article:last-child span {
    background: #fee2e2;
    color: #b91c1c;
}

.python-lesson-page .python-tip-grid p {
    margin: 1px 0 0;
    color: #64748b;
    font-size: 11px;
    line-height: 1.55;
}

.python-lesson-page .python-mistakes-card {
    border-top: 4px solid #ef4444;
}

.python-lesson-page .python-mistakes-card h2 {
    margin: 5px 0 18px;
}

.python-lesson-page .python-mistake-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.python-lesson-page .python-mistake-list article {
    overflow: hidden;
    border: 1px solid #fecaca;
    border-radius: 12px;
    background: #fffafa;
}

.python-lesson-page .python-mistake-list article > span {
    display: block;
    padding: 9px 13px;
    background: #fee2e2;
    color: #b91c1c;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-mistake-list article > div {
    padding: 15px;
}

.python-lesson-page .python-mistake-list code {
    color: #991b1b;
    font-size: 11px;
}

.python-lesson-page .python-mistake-list p {
    margin: 10px 0 0;
    color: #64748b;
    font-size: 11px;
    line-height: 1.55;
}

.python-lesson-page .python-debug-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
    padding: 14px;
    border-radius: 10px;
    background: #f8fafc;
    font-size: 11px;
}

.python-lesson-page .python-debug-steps strong {
    margin-right: 4px;
    color: #334155;
}

.python-lesson-page .python-debug-steps span {
    padding: 4px 8px;
    border-radius: 999px;
    background: #e2e8f0;
    color: #475569;
}

.python-lesson-page .python-quiz {
    scroll-margin-top: 90px;
    border-top: 4px solid var(--python-gold);
}

.python-lesson-page .python-quiz-count {
    flex: 0 0 auto;
    padding: 7px 11px;
    border-radius: 999px;
    background: #fffbeb;
    color: #92400e;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-quiz-question {
    margin: 14px 0 0;
    padding: 20px;
    border: 1px solid #e2e8f0;
    border-radius: 13px;
    background: #ffffff;
}

.python-lesson-page .python-quiz-question.is-correct {
    border-color: #86efac;
    background: #f0fdf4;
}

.python-lesson-page .python-quiz-question.is-wrong {
    border-color: #fca5a5;
    background: #fef2f2;
}

.python-lesson-page .python-quiz-question legend {
    width: 100%;
    padding: 0;
    color: var(--python-navy);
    font-size: 14px;
    font-weight: 800;
}

.python-lesson-page .python-quiz-question legend span {
    display: inline-grid;
    width: 28px;
    height: 28px;
    margin-right: 7px;
    place-items: center;
    border-radius: 8px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 10px;
}

.python-lesson-page .python-quiz-question label {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    margin-top: 9px;
    padding: 10px 12px;
    border: 1px solid #e2e8f0;
    border-radius: 9px;
    color: #475569;
    font-size: 12px;
    cursor: pointer;
}

.python-lesson-page .python-quiz-question label:hover {
    border-color: #93c5fd;
    background: #f8fbff;
}

.python-lesson-page .python-quiz-question input {
    margin-top: 2px;
    accent-color: var(--python-blue);
}

.python-lesson-page .python-quiz-feedback {
    margin: 12px 0 0;
    font-size: 11px;
    font-weight: 750;
}

.python-lesson-page .python-quiz-question.is-correct .python-quiz-feedback { color: #15803d; }
.python-lesson-page .python-quiz-question.is-wrong .python-quiz-feedback { color: #b91c1c; }

.python-lesson-page .python-quiz-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.python-lesson-page .python-quiz-result {
    margin: 0 0 0 auto;
    color: #334155;
    font-size: 13px;
    font-weight: 850;
}

.python-lesson-page .python-practice-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 15px;
}

.python-lesson-page .python-practice-list > article {
    display: flex;
    min-height: 355px;
    flex-direction: column;
    padding: 22px;
    border: 1px solid #e2e8f0;
    border-radius: 14px;
    background: #ffffff;
}

.python-lesson-page .python-practice-head span {
    color: #b98400;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.09em;
}

.python-lesson-page .python-practice-head h3 {
    margin: 5px 0 12px;
    color: var(--python-navy);
    font-size: 18px;
}

.python-lesson-page .python-practice-list > article > p {
    margin: 0 0 13px;
    color: #64748b;
    font-size: 12px;
    line-height: 1.65;
}

.python-lesson-page .python-sample {
    padding: 12px;
    border-radius: 9px;
    background: #f8fafc;
}

.python-lesson-page .python-sample strong,
.python-lesson-page .python-sample code {
    display: block;
}

.python-lesson-page .python-sample strong {
    margin-bottom: 7px;
    color: #475569;
    font-size: 9px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.python-lesson-page .python-sample code {
    color: #334155;
    font-weight: 650;
    line-height: 1.65;
}

.python-lesson-page .python-practice-list > article > .python-code-block {
    margin-bottom: 14px;
    border-radius: 10px;
}

.python-lesson-page .python-reveal-button {
    align-self: flex-start;
    margin-top: auto;
}

.python-lesson-page .python-hidden-solution {
    margin-top: 12px;
    overflow: hidden;
    border-radius: 10px;
}

.python-lesson-page .python-hidden-solution[hidden] {
    display: none;
}

.python-lesson-page .python-level-complete {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 25px;
    border: 1px solid #86efac;
    border-left: 5px solid #22c55e;
    background: linear-gradient(135deg, #ffffff, #f0fdf4);
}

.python-lesson-page .python-level-complete h2 {
    margin: 5px 0 8px;
}

.python-lesson-page .python-level-complete p {
    max-width: 740px;
}

.python-lesson-page .python-level-complete-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 9px;
}

.python-lesson-page .python-level-complete-actions .python-complete-button {
    min-height: 44px;
}

@media (max-width: 1180px) {
    .python-lesson-page .python-lesson-hero {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-lesson-terminal {
        max-width: 760px;
    }

    .python-lesson-page .python-objective-grid,
    .python-lesson-page .python-feature-grid,
    .python-lesson-page .python-use-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .python-lesson-page .python-choice-grid {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-choice-grid article {
        min-height: 0;
    }

    .python-lesson-page .python-mistake-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 880px) {
    .python-lesson-page .python-execution-flow {
        flex-direction: column;
    }

    .python-lesson-page .python-execution-flow article {
        flex: none;
        width: 100%;
    }

    .python-lesson-page .python-execution-flow > b {
        transform: rotate(90deg);
        text-align: center;
    }

    .python-lesson-page .python-example-grid {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-example-output {
        border-top: 1px solid #263852;
        border-left: 0;
    }

    .python-lesson-page .python-practice-list {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-practice-list > article {
        min-height: 0;
    }

    .python-lesson-page .python-level-complete {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .python-lesson-page .python-lesson-hero,
    .python-lesson-page .python-lesson-section {
        padding: 20px;
        border-radius: 15px;
    }

    .python-lesson-page .python-lesson-hero h1 {
        font-size: 35px;
    }

    .python-lesson-page .python-lesson-terminal pre {
        min-height: 0;
        padding: 17px;
        font-size: 11px;
    }

    .python-lesson-page .python-objective-grid,
    .python-lesson-page .python-feature-grid,
    .python-lesson-page .python-use-grid,
    .python-lesson-page .python-rule-grid,
    .python-lesson-page .python-compare-grid,
    .python-lesson-page .python-tip-grid,
    .python-lesson-page .python-syntax-labels {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-definition,
    .python-lesson-page .python-note {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-example-title,
    .python-lesson-page .python-quiz-actions,
    .python-lesson-page .python-level-complete-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .python-lesson-page .python-copy-button,
    .python-lesson-page .python-quiz-actions .python-button,
    .python-lesson-page .python-level-complete-actions .python-button,
    .python-lesson-page .python-level-complete-actions .python-complete-button {
        width: 100%;
    }

    .python-lesson-page .python-quiz-result {
        margin-left: 0;
    }
}

/* ================================================================
   CODEBHAVYA STANDARD LEARNING SECTIONS — PYTHON LEVEL 1
   ================================================================ */

.python-lesson-page .python-standard-section {
    margin-bottom: 28px;
    scroll-margin-top: 90px;
}

.python-lesson-page .python-standard-label {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 5px 10px;
    border: 1px solid #fde68a;
    border-radius: 999px;
    background: #fffbeb;
    color: #9a6700;
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.python-lesson-page .python-standard-section > h2 {
    margin: 10px 0 8px;
    color: var(--python-navy);
    font-size: clamp(24px, 3vw, 32px);
    line-height: 1.25;
}

.python-lesson-page .python-standard-intro {
    margin: 0 0 20px;
    color: #64748b;
    font-size: 13px;
    line-height: 1.7;
}

.python-lesson-page .python-standard-section code {
    color: #1d4ed8;
    font-weight: 750;
}

/* Quick revision */
.python-lesson-page .python-revision-section {
    border-top: 4px solid var(--python-blue);
}

.python-lesson-page .python-revision-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 11px;
}

.python-lesson-page .python-revision-grid article {
    display: grid;
    grid-template-columns: 36px 1fr;
    align-items: start;
    gap: 12px;
    min-height: 84px;
    padding: 15px;
    border: 1px solid #dbeafe;
    border-radius: 11px;
    background: #f8fbff;
}

.python-lesson-page .python-revision-grid article > span {
    display: grid;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 9px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-revision-grid p {
    margin: 2px 0 0;
    color: #475569;
    font-size: 12px;
    line-height: 1.6;
}

/* Programming problem arena */
.python-lesson-page .python-programming-section {
    border-top: 4px solid #16a34a;
}

.python-lesson-page .python-practice-overall {
    margin: 20px 0;
    padding: 20px;
    border: 1px solid #bfdbfe;
    border-radius: 15px;
    background: linear-gradient(135deg, #0d1b2a, #153b6f);
    color: #ffffff;
    box-shadow: 0 12px 28px rgba(13, 27, 42, 0.16);
}

.python-lesson-page .python-practice-overall-title {
    margin-bottom: 15px;
    color: #f5d76e;
    font-size: 14px;
    font-weight: 850;
}

.python-lesson-page .python-practice-overall-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 9px;
}

.python-lesson-page .python-practice-overall-grid > div {
    padding: 13px;
    border: 1px solid rgba(147, 197, 253, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.07);
}

.python-lesson-page .python-practice-overall-grid strong,
.python-lesson-page .python-practice-overall-grid span {
    display: block;
}

.python-lesson-page .python-practice-overall-grid strong {
    color: #cbd5e1;
    font-size: 9px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.python-lesson-page .python-practice-overall-grid span {
    margin-top: 5px;
    color: #ffffff;
    font-size: 16px;
    font-weight: 900;
}

.python-lesson-page .python-practice-progress-track {
    height: 10px;
    margin-top: 14px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
}

.python-lesson-page .python-practice-progress-track > span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #22c55e, #f5d76e);
    transition: width 0.3s ease;
}

.python-lesson-page .python-practice-overall > p {
    margin: 11px 0 0;
    color: #cbd5e1;
    font-size: 10px;
    line-height: 1.55;
}

.python-lesson-page .python-coding-problem-list {
    display: grid;
    gap: 16px;
}

.python-lesson-page .python-coding-problem {
    overflow: hidden;
    padding: 22px;
    border: 1px solid #dbe4f0;
    border-radius: 15px;
    background: #ffffff;
    box-shadow: 0 7px 20px rgba(15, 23, 42, 0.045);
}

.python-lesson-page .python-coding-problem.is-solved {
    border-color: #86efac;
    background: linear-gradient(150deg, #ffffff, #f0fdf4);
}

.python-lesson-page .python-coding-problem.is-completed {
    border-color: #fde68a;
    background: linear-gradient(150deg, #ffffff, #fffbeb);
}

.python-lesson-page .python-coding-problem-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.python-lesson-page .python-coding-problem-head > strong {
    color: var(--python-navy);
    font-size: 17px;
}

.python-lesson-page .python-practice-badge {
    min-height: 24px;
    padding: 4px 9px;
    border-radius: 999px;
    color: #475569;
    font-size: 9px;
    font-weight: 900;
}

.python-lesson-page .python-practice-badge.solved {
    background: #dcfce7;
    color: #15803d;
}

.python-lesson-page .python-practice-badge.completed {
    background: #fef3c7;
    color: #92400e;
}

.python-lesson-page .python-coding-problem > p {
    margin: 10px 0;
    color: #64748b;
    font-size: 12px;
    line-height: 1.6;
}

.python-lesson-page .python-problem-io {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.python-lesson-page .python-problem-io > span {
    padding: 7px 10px;
    border-radius: 8px;
    background: #f1f5f9;
    color: #475569;
    font-size: 10px;
}

.python-lesson-page .python-coding-buttons,
.python-lesson-page .python-editor-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.python-lesson-page .python-coding-buttons button,
.python-lesson-page .python-editor-actions button,
.python-lesson-page .python-standard-controls button,
.python-lesson-page .python-compact-toggle,
.python-lesson-page .python-interview-list button {
    min-height: 38px;
    padding: 8px 13px;
    border: 1px solid transparent;
    border-radius: 8px;
    font: inherit;
    font-size: 10px;
    font-weight: 850;
    cursor: pointer;
    transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.python-lesson-page .python-coding-buttons button:hover,
.python-lesson-page .python-editor-actions button:hover,
.python-lesson-page .python-standard-controls button:hover,
.python-lesson-page .python-compact-toggle:hover,
.python-lesson-page .python-interview-list button:hover {
    transform: translateY(-1px);
}

.python-lesson-page .python-solve-button,
.python-lesson-page .python-run-button {
    background: #2563eb;
    color: #ffffff;
}

.python-lesson-page .python-hint-button {
    border-color: #fde68a !important;
    background: #fffbeb;
    color: #92400e;
}

.python-lesson-page .python-program-button {
    border-color: #cbd5e1 !important;
    background: #ffffff;
    color: #475569;
}

.python-lesson-page .python-check-button {
    background: #16a34a;
    color: #ffffff;
}

.python-lesson-page .python-reset-button {
    border-color: #475569 !important;
    background: #17263c;
    color: #e2e8f0;
}

.python-lesson-page .python-problem-hint {
    margin-top: 13px;
    padding: 12px 14px;
    border: 1px solid #fde68a;
    border-radius: 9px;
    background: #fffbeb;
    color: #78716c;
    font-size: 11px;
}

.python-lesson-page .python-coding-workspace {
    margin-top: 15px;
    overflow: hidden;
    border: 1px solid #263852;
    border-radius: 13px;
    background: #0b1728;
}

.python-lesson-page .python-workspace-title {
    padding: 11px 15px;
    border-bottom: 1px solid #263852;
    background: #101d31;
    color: #93c5fd;
    font-size: 11px;
    font-weight: 850;
}

.python-lesson-page .python-workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.python-lesson-page .python-workspace-panel {
    min-width: 0;
    padding: 16px;
}

.python-lesson-page .python-workspace-panel + .python-workspace-panel {
    border-left: 1px solid #263852;
}

.python-lesson-page .python-workspace-panel h3 {
    margin: 0 0 9px;
    color: #cbd5e1;
    font-size: 10px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.python-lesson-page .python-workspace-panel h3:not(:first-child) {
    margin-top: 15px;
}

.python-lesson-page .python-workspace-panel textarea {
    width: 100%;
    min-height: 235px;
    resize: vertical;
    padding: 15px;
    border: 1px solid #334155;
    border-radius: 9px;
    outline: none;
    background: #07111f;
    color: #dbeafe;
    font: 12px/1.7 "SFMono-Regular", Consolas, monospace;
    tab-size: 4;
}

.python-lesson-page .python-workspace-panel textarea:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.12);
}

.python-lesson-page .python-workspace-output {
    min-height: 115px;
    margin: 0;
    padding: 14px;
    overflow: auto;
    border: 1px solid #334155;
    border-radius: 9px;
    background: #07111f;
    color: #86efac;
    font-size: 11px;
    line-height: 1.65;
    white-space: pre-wrap;
}

.python-lesson-page .python-test-results > div {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    background: #17263c;
    color: #94a3b8;
    font-size: 10px;
}

.python-lesson-page .python-test-results > div.pass {
    background: rgba(22, 163, 74, 0.16);
    color: #86efac;
}

.python-lesson-page .python-test-results > div.fail {
    background: rgba(239, 68, 68, 0.14);
    color: #fca5a5;
}

.python-lesson-page .python-problem-score {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    padding: 0 16px 14px;
}

.python-lesson-page .python-problem-score > div {
    padding: 10px 12px;
    border: 1px solid #263852;
    border-radius: 8px;
    background: #101d31;
}

.python-lesson-page .python-problem-score strong,
.python-lesson-page .python-problem-score span {
    display: block;
}

.python-lesson-page .python-problem-score strong {
    color: #64748b;
    font-size: 8px;
    text-transform: uppercase;
}

.python-lesson-page .python-problem-score span {
    margin-top: 4px;
    color: #ffffff;
    font-size: 11px;
    font-weight: 800;
}

.python-lesson-page .python-problem-message {
    margin: 0 16px 16px !important;
    padding: 11px 13px;
    border-radius: 8px;
    background: #17263c;
    color: #cbd5e1 !important;
    font-size: 10px !important;
}

.python-lesson-page .python-official-solution {
    margin-top: 14px;
    overflow: hidden;
    border: 1px solid #bfdbfe;
    border-radius: 11px;
}

.python-lesson-page .python-official-solution > strong {
    display: block;
    padding: 10px 13px;
    background: #eff6ff;
    color: #1d4ed8;
    font-size: 10px;
    text-transform: uppercase;
}

.python-lesson-page .python-official-solution pre {
    margin: 0;
    padding: 17px;
    overflow: auto;
    background: var(--python-code);
    color: #dbeafe;
    font-size: 11px;
    line-height: 1.7;
}

/* Key takeaway */
.python-lesson-page .python-takeaway-section {
    border-left: 5px solid var(--python-gold);
    background: linear-gradient(135deg, #ffffff, #fffbeb);
}

.python-lesson-page .python-takeaway-flow {
    display: grid;
    grid-template-columns: repeat(7, auto);
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

.python-lesson-page .python-takeaway-flow article {
    min-height: 145px;
    padding: 16px;
    border: 1px solid #fde68a;
    border-radius: 12px;
    background: #ffffff;
}

.python-lesson-page .python-takeaway-flow article > span {
    display: grid;
    width: 30px;
    height: 30px;
    margin-bottom: 10px;
    place-items: center;
    border-radius: 50%;
    background: #fef3c7;
    color: #92400e;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-takeaway-flow strong {
    color: var(--python-navy);
    font-size: 13px;
}

.python-lesson-page .python-takeaway-flow p {
    margin: 6px 0 0;
    color: #64748b;
    font-size: 10px;
    line-height: 1.55;
}

.python-lesson-page .python-takeaway-flow > b {
    color: var(--python-gold);
    font-size: 22px;
}

.python-lesson-page .python-takeaway-message {
    margin: 16px 0 0;
    padding: 13px 15px;
    border-radius: 9px;
    background: #fef3c7;
    color: #78350f;
    font-size: 12px;
    font-weight: 750;
    line-height: 1.6;
}

/* Visualizer and tracer */
.python-lesson-page .python-compact-learning {
    border-top: 4px solid #7c3aed;
}

.python-lesson-page .python-compact-toggle {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #ffffff;
    box-shadow: 0 7px 16px rgba(37, 99, 235, 0.16);
}

.python-lesson-page .python-compact-panel {
    margin-top: 16px;
}

.python-lesson-page .python-visualizer,
.python-lesson-page .python-program-tracer {
    overflow: hidden;
    border: 1px solid #263852;
    border-radius: 15px;
    background: #0b1728;
    color: #e2e8f0;
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.16);
}

.python-lesson-page .python-interactive-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 15px;
    padding: 11px 16px;
    border-bottom: 1px solid #263852;
    background: #101d31;
    color: #94a3b8;
    font-size: 9px;
    font-weight: 850;
    letter-spacing: 0.08em;
}

.python-lesson-page .python-interactive-topbar strong {
    color: var(--python-gold-light);
    font-family: Georgia, serif;
    font-size: 15px;
    letter-spacing: 0;
}

.python-lesson-page .python-interactive-topbar strong i {
    color: #93c5fd;
    font-style: normal;
}

.python-lesson-page .python-visualizer > h3 {
    margin: 20px 20px 8px;
    color: #ffffff;
    font-size: 20px;
}

.python-lesson-page .python-visual-flow {
    display: grid;
    grid-template-columns: repeat(9, auto);
    align-items: center;
    gap: 7px;
    margin: 18px;
    overflow-x: auto;
}

.python-lesson-page .python-visual-flow span {
    min-width: 112px;
    padding: 11px 10px;
    border: 1px solid #334155;
    border-radius: 9px;
    background: #101d31;
    color: #94a3b8;
    font-size: 9px;
    font-weight: 800;
    text-align: center;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.python-lesson-page .python-visual-flow span.is-complete {
    border-color: #22c55e;
    background: rgba(22, 163, 74, 0.14);
    color: #86efac;
}

.python-lesson-page .python-visual-flow span.is-active {
    border-color: #60a5fa;
    background: rgba(37, 99, 235, 0.22);
    color: #bfdbfe;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.09);
}

.python-lesson-page .python-visual-flow b {
    color: var(--python-gold-light);
}

.python-lesson-page .python-visual-stage {
    min-height: 190px;
    margin: 0 18px;
    padding: 24px;
    border: 1px solid #334155;
    border-radius: 12px;
    background: radial-gradient(circle at 5% 0, rgba(37, 99, 235, 0.18), transparent 36%), #07111f;
}

.python-lesson-page .python-visual-stage > span {
    color: var(--python-gold-light);
    font-size: 9px;
    font-weight: 900;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.python-lesson-page .python-visual-stage h3 {
    margin: 11px 0 7px;
    color: #ffffff;
    font-size: 19px;
}

.python-lesson-page .python-visual-stage p {
    margin: 0;
    color: #cbd5e1;
    font-size: 12px;
    line-height: 1.7;
}

.python-lesson-page .python-visual-dots {
    display: flex;
    gap: 6px;
    margin-top: 20px;
}

.python-lesson-page .python-visual-dots i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #334155;
}

.python-lesson-page .python-visual-dots i.active {
    width: 24px;
    border-radius: 999px;
    background: #60a5fa;
}

.python-lesson-page .python-standard-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 18px 12px;
}

.python-lesson-page .python-standard-controls button {
    color: #ffffff;
}

.python-lesson-page .python-standard-controls .previous { background: #475569; }
.python-lesson-page .python-standard-controls .next { background: #2563eb; }
.python-lesson-page .python-standard-controls .auto { background: #16a34a; }
.python-lesson-page .python-standard-controls .pause { background: #d97706; }
.python-lesson-page .python-standard-controls .reset { background: #7c3aed; }

.python-lesson-page .python-mini-progress {
    height: 7px;
    margin: 0 18px 18px;
    overflow: hidden;
    border-radius: 999px;
    background: #1e293b;
}

.python-lesson-page .python-mini-progress > span {
    display: block;
    width: 20%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #2563eb, #f5d76e);
    transition: width 0.25s ease;
}

.python-lesson-page .python-tracer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
}

.python-lesson-page .python-tracer-code-wrap,
.python-lesson-page .python-tracer-state-wrap {
    min-width: 0;
}

.python-lesson-page .python-tracer-state-wrap {
    border-left: 1px solid #263852;
}

.python-lesson-page .python-tracer-heading {
    padding: 11px 15px;
    border-bottom: 1px solid #263852;
    background: #101d31;
    color: #93c5fd;
    font-size: 10px;
    font-weight: 850;
    text-transform: uppercase;
}

.python-lesson-page .python-tracer-code {
    min-height: 320px;
    margin: 0;
    padding: 16px 0;
    overflow: auto;
    color: #dbeafe;
    font-size: 11px;
    line-height: 1.7;
}

.python-lesson-page .python-tracer-code span {
    display: block;
    padding: 3px 16px;
    border-left: 3px solid transparent;
    white-space: pre;
}

.python-lesson-page .python-tracer-code span.is-active {
    border-left-color: #f5d76e;
    background: rgba(245, 215, 110, 0.1);
    color: #ffffff;
}

.python-lesson-page .python-tracer-note {
    min-height: 70px;
    margin: 16px;
    padding: 13px;
    border: 1px solid #334155;
    border-radius: 9px;
    background: #101d31;
    color: #cbd5e1;
    font-size: 11px;
    line-height: 1.6;
}

.python-lesson-page .python-live-state {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 0 16px 16px;
}

.python-lesson-page .python-live-state > div {
    padding: 11px;
    border: 1px solid #334155;
    border-radius: 8px;
    background: #07111f;
}

.python-lesson-page .python-live-state strong,
.python-lesson-page .python-live-state span {
    display: block;
}

.python-lesson-page .python-live-state strong {
    color: #64748b;
    font-size: 8px;
    text-transform: uppercase;
}

.python-lesson-page .python-live-state span {
    margin-top: 4px;
    color: #f5d76e;
    font: 750 11px/1.45 monospace;
}

.python-lesson-page .python-tracer-output {
    margin: 0 16px 16px;
}

.python-lesson-page .python-tracer-output > strong {
    color: #94a3b8;
    font-size: 9px;
    text-transform: uppercase;
}

.python-lesson-page .python-tracer-output pre {
    min-height: 80px;
    margin: 7px 0 0;
    padding: 12px;
    border: 1px solid #334155;
    border-radius: 8px;
    background: #07111f;
    color: #86efac;
    font-size: 11px;
    white-space: pre-wrap;
}

.python-lesson-page .python-tracer-status {
    margin: 0 18px 18px;
    padding: 8px 11px;
    border-radius: 8px;
    background: #101d31;
    color: #94a3b8;
    font-size: 9px;
    text-align: center;
}

/* Interview, tips and extra practice */
.python-lesson-page .python-interview-list {
    display: grid;
    gap: 10px;
}

.python-lesson-page .python-interview-list article {
    overflow: hidden;
    border: 1px solid #dbe4f0;
    border-radius: 11px;
    background: #ffffff;
}

.python-lesson-page .python-interview-list article > div {
    display: grid;
    grid-template-columns: 32px 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 14px;
}

.python-lesson-page .python-interview-list article > div > span {
    display: grid;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 8px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-interview-list article > div > p {
    margin: 0;
    color: #334155;
    font-size: 12px;
    font-weight: 750;
}

.python-lesson-page .python-interview-list button {
    border-color: #bfdbfe;
    background: #eff6ff;
    color: #1d4ed8;
}

.python-lesson-page .python-interview-list article > p {
    margin: 0;
    padding: 14px 18px;
    border-top: 1px solid #dbeafe;
    background: #f8fbff;
    color: #475569;
    font-size: 11px;
    line-height: 1.65;
}

.python-lesson-page .python-extra-tip-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 11px;
    margin: 19px 0 0;
    padding: 0;
    list-style: none;
}

.python-lesson-page .python-extra-tip-grid li {
    display: grid;
    grid-template-columns: 38px 1fr;
    gap: 11px;
    padding: 16px;
    border: 1px solid #fde68a;
    border-radius: 11px;
    background: #fffbeb;
}

.python-lesson-page .python-extra-tip-grid span {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 10px;
    background: #fef3c7;
    color: #92400e;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-extra-tip-grid p {
    margin: 2px 0 0;
    color: #57534e;
    font-size: 11px;
    line-height: 1.6;
}

.python-lesson-page .python-extra-practice-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin: 19px 0 0;
    padding: 0;
    list-style: none;
    counter-reset: python-extra-practice;
}

.python-lesson-page .python-extra-practice-list li {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    align-items: start;
    gap: 12px;
    min-height: 78px;
    padding: 16px;
    border: 1px solid #dbe4f0;
    border-radius: 11px;
    background: #f8fafc;
    color: #475569;
    font-size: 11px;
    line-height: 1.6;
    counter-increment: python-extra-practice;
}

.python-lesson-page .python-extra-practice-list li::before {
    content: counter(python-extra-practice, decimal-leading-zero);
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    border-radius: 10px;
    background: #dbeafe;
    color: #1d4ed8;
    font-size: 10px;
    font-weight: 900;
}

.python-lesson-page .python-extra-practice-text {
    display: block;
    min-width: 0;
    padding-top: 4px;
    overflow-wrap: anywhere;
}

/* Readability refinement */
.python-lesson-page .python-objective-grid p,
.python-lesson-page .python-section-intro,
.python-lesson-page .python-explanation-card > p,
.python-lesson-page .python-definition p,
.python-lesson-page .python-feature-grid p,
.python-lesson-page .python-note p,
.python-lesson-page .python-choice-grid p,
.python-lesson-page .python-choice-grid ol,
.python-lesson-page .python-rule-grid p,
.python-lesson-page .python-compare-grid p,
.python-lesson-page .python-tip-grid p,
.python-lesson-page .python-mistake-list p,
.python-lesson-page .python-quiz-question label,
.python-lesson-page .python-practice-list > article > p,
.python-lesson-page .python-revision-grid p,
.python-lesson-page .python-coding-problem > p,
.python-lesson-page .python-standard-intro,
.python-lesson-page .python-takeaway-message,
.python-lesson-page .python-visual-stage p,
.python-lesson-page .python-interview-list article > div > p,
.python-lesson-page .python-interview-list article > p,
.python-lesson-page .python-extra-tip-grid p,
.python-lesson-page .python-extra-practice-list li {
    font-size: 14px;
}

.python-lesson-page .python-use-grid span,
.python-lesson-page .python-execution-flow small,
.python-lesson-page .python-syntax-labels small,
.python-lesson-page .python-table-wrap table,
.python-lesson-page .python-problem-io > span,
.python-lesson-page .python-practice-overall > p,
.python-lesson-page .python-problem-hint,
.python-lesson-page .python-workspace-title,
.python-lesson-page .python-workspace-panel h3,
.python-lesson-page .python-test-results > div,
.python-lesson-page .python-official-solution > strong,
.python-lesson-page .python-takeaway-flow p,
.python-lesson-page .python-visual-flow span,
.python-lesson-page .python-tracer-heading,
.python-lesson-page .python-tracer-status {
    font-size: 12px;
}

.python-lesson-page .python-code-block,
.python-lesson-page .python-example-output pre,
.python-lesson-page .python-rule-grid pre,
.python-lesson-page .python-workspace-panel textarea,
.python-lesson-page .python-workspace-output,
.python-lesson-page .python-official-solution pre,
.python-lesson-page .python-tracer-code,
.python-lesson-page .python-tracer-note,
.python-lesson-page .python-live-state span,
.python-lesson-page .python-tracer-output pre {
    font-size: 13px;
}

.python-lesson-page .python-coding-buttons button,
.python-lesson-page .python-editor-actions button,
.python-lesson-page .python-standard-controls button,
.python-lesson-page .python-compact-toggle,
.python-lesson-page .python-interview-list button {
    font-size: 12px;
}

.python-lesson-page .python-problem-message {
    font-size: 13px !important;
}

.python-lesson-page .python-standard-controls button:disabled {
    opacity: 0.42;
    cursor: not-allowed;
    filter: grayscale(0.45);
    transform: none;
    box-shadow: none;
}

@media (max-width: 1180px) {
    .python-lesson-page .python-practice-overall-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .python-lesson-page .python-takeaway-flow {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .python-lesson-page .python-takeaway-flow > b {
        display: none;
    }
}

@media (max-width: 880px) {
    .python-lesson-page .python-workspace-grid,
    .python-lesson-page .python-tracer-grid {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-workspace-panel + .python-workspace-panel,
    .python-lesson-page .python-tracer-state-wrap {
        border-top: 1px solid #263852;
        border-left: 0;
    }

    .python-lesson-page .python-visual-flow {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-visual-flow b {
        transform: rotate(90deg);
        text-align: center;
    }

    .python-lesson-page .python-visual-flow span {
        min-width: 0;
    }
}

@media (max-width: 620px) {
    .python-lesson-page .python-revision-grid,
    .python-lesson-page .python-practice-overall-grid,
    .python-lesson-page .python-problem-score,
    .python-lesson-page .python-takeaway-flow,
    .python-lesson-page .python-extra-tip-grid,
    .python-lesson-page .python-extra-practice-list {
        grid-template-columns: 1fr;
    }

    .python-lesson-page .python-coding-problem {
        padding: 17px;
    }

    .python-lesson-page .python-coding-problem-head,
    .python-lesson-page .python-coding-buttons,
    .python-lesson-page .python-editor-actions,
    .python-lesson-page .python-standard-controls {
        align-items: stretch;
        flex-direction: column;
    }

    .python-lesson-page .python-coding-buttons button,
    .python-lesson-page .python-editor-actions button,
    .python-lesson-page .python-standard-controls button,
    .python-lesson-page .python-compact-toggle {
        width: 100%;
    }

    .python-lesson-page .python-interview-list article > div {
        grid-template-columns: 32px 1fr;
    }

    .python-lesson-page .python-interview-list button {
        grid-column: 1 / -1;
        width: 100%;
    }

    .python-lesson-page .python-interactive-topbar {
        align-items: flex-start;
        flex-direction: column;
    }
}

/* ================================================================
   FINAL MOBILE SIDEBAR SAFEGUARD

   Keep the topic control visible while scrolling. The closed sidebar
   is removed from layout completely, so it can never leave an empty
   sidebar-height gap above the lesson content. When opened, it becomes
   a viewport overlay below the sticky control.
   ================================================================ */
@media (max-width: 880px) {
    html,
    body.python-page {
        overflow-x: hidden !important;
    }

    .python-page .python-sidebar-toggle {
        position: sticky !important;
        top: 0 !important;
        z-index: 1200 !important;
        display: flex !important;
        align-items: center;
        width: 100% !important;
        min-height: 48px !important;
        margin: 0 !important;
        padding: 11px 18px !important;
        box-sizing: border-box !important;
        box-shadow: 0 5px 14px rgba(15, 23, 42, 0.08);
    }

    .python-page .docs-layout {
        display: block !important;
        min-height: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .python-page .docs-layout > .sidebar {
        display: none !important;
        position: fixed !important;
        top: 48px !important;
        right: auto !important;
        bottom: 0 !important;
        left: 0 !important;
        z-index: 1150 !important;
        width: min(340px, 90vw) !important;
        min-width: 0 !important;
        height: calc(100dvh - 48px) !important;
        max-height: calc(100dvh - 48px) !important;
        margin: 0 !important;
        padding: 20px 14px !important;
        overflow-x: hidden !important;
        overflow-y: auto !important;
        overscroll-behavior: contain;
        transform: none !important;
        box-shadow: 14px 0 34px rgba(15, 23, 42, 0.24);
    }

    .python-page .docs-layout > .sidebar.is-open {
        display: block !important;
    }

    /* Open the mobile menu as one clean viewport drawer. */
    body.python-page:has(.docs-layout > .sidebar.is-open) {
        overflow: hidden !important;
    }

    body.python-page:has(.docs-layout > .sidebar.is-open) .python-sidebar-toggle {
        position: fixed !important;
        top: 0 !important;
        right: 0 !important;
        left: 0 !important;
        z-index: 1250 !important;
    }

    body.python-page:has(.docs-layout > .sidebar.is-open) .docs-layout > .sidebar {
        top: 48px !important;
        height: calc(100dvh - 48px) !important;
        max-height: calc(100dvh - 48px) !important;
    }

    .python-page .docs-layout > .main-content {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        display: block !important;
        width: 100% !important;
        min-height: 0 !important;
        margin: 0 !important;
        float: none !important;
        transform: none !important;
    }
}