/* ============================================================
   CODEBHAVYA — DSA PRESENTATION LAYER
   ------------------------------------------------------------
   Transfers the visual language of the C Programming lessons to
   the existing DSA pages. DSA content, IDs, scripts, visualizers,
   tracers, editors and state logic remain unchanged.
   ============================================================ */

:root {
    --cb-dsa-navy: #0d1b2a;
    --cb-dsa-gold: #d4af37;
    --cb-dsa-gold-light: #f5d76e;
    --cb-dsa-heading: #153b6f;
    --cb-dsa-blue: #2563eb;
    --cb-dsa-green: #15803d;
    --cb-dsa-orange: #d97706;
    --cb-dsa-slate: #475569;
    --cb-dsa-muted: #64748b;
    --cb-dsa-border: #e2e8f0;
    --cb-dsa-soft-border: #dce7f0;
    --cb-dsa-soft: #f8fafc;
    --cb-dsa-page: #f5f7fb;
    --cb-dsa-code-blue: #b8d8f0;
}

/* ---------- Shared page foundation ---------- */

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

body.cb-dsa-page {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--cb-dsa-page);
    color: #1e293b;
    line-height: 1.7;
}

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

/* ---------- C Programming header treatment ---------- */

.cb-dsa-page .top-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1000;
    min-height: 72px;
    height: 72px;
    padding: 0 35px;
    background: var(--cb-dsa-navy);
    color: #ffffff;
    border-bottom: 2px solid var(--cb-dsa-gold);
    box-shadow: 0 4px 15px rgba(13, 27, 42, 0.15);
}

.cb-dsa-page .top-header .logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    width: fit-content;
    min-width: 0;
    height: 72px;
    margin-right: 25px;
    color: #ffffff;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 29px;
    font-weight: 700;
    letter-spacing: 0.2px;
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
}

.cb-dsa-page .codebhavya-new-logo .main-logo {
    display: block;
    width: 72px;
    height: 72px;
    margin: 0 10px 0 0;
    object-fit: contain;
    flex-shrink: 0;
}

.cb-dsa-page .codebhavya-new-logo .brand-name {
    display: inline-flex;
    align-items: center;
    gap: 0;
    white-space: nowrap;
}

.cb-dsa-page .logo-code,
.cb-dsa-page .codebhavya-new-logo .logo-code {
    margin: 0;
    padding: 0;
    color: var(--cb-dsa-code-blue);
    -webkit-text-fill-color: var(--cb-dsa-code-blue);
}

.cb-dsa-page .logo-bhavya,
.cb-dsa-page .codebhavya-new-logo .logo-bhavya {
    margin: 0;
    padding: 0;
    color: var(--cb-dsa-gold);
    background: linear-gradient(90deg, #d4af37, #f5d76e, #d4af37);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cb-dsa-page .top-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
}

.cb-dsa-page .top-nav a {
    position: relative;
    padding: 9px 13px;
    border-radius: 6px;
    color: #e5e7eb;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    text-decoration: none;
    transition: color 0.2s ease, background 0.2s ease;
}

.cb-dsa-page .top-nav a::after {
    content: "";
    position: absolute;
    left: 13px;
    right: 13px;
    bottom: 3px;
    height: 2px;
    background: var(--cb-dsa-gold);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.2s ease;
}

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

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

.cb-dsa-page .top-nav a.active {
    color: var(--cb-dsa-gold-light);
    font-weight: 700;
}

/* ---------- C Programming documentation layout ---------- */

.cb-dsa-page .docs-layout {
    display: flex;
    position: relative;
    width: 100%;
    max-width: none;
    min-height: calc(100vh - 72px);
    margin: 0;
    padding: 0;
    gap: 0;
}

.cb-dsa-page .sidebar {
    position: sticky;
    top: 72px;
    align-self: flex-start;
    z-index: 20;
    width: 280px;
    flex: 0 0 280px;
    min-width: 0;
    height: calc(100vh - 72px);
    padding: 18px 14px 24px;
    overflow-y: auto;
    background: #ffffff;
    border-right: 1px solid var(--cb-dsa-border);
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

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

.cb-dsa-page .sidebar::-webkit-scrollbar-track {
    background: transparent;
}

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

.cb-dsa-page .sidebar > .sidebar-title:first-child {
    padding: 12px 14px;
    margin: 0 0 16px;
    border-left: 4px solid var(--cb-dsa-gold);
    border-radius: 10px;
    background: var(--cb-dsa-soft);
    color: var(--cb-dsa-navy);
    font-size: 17px;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: 0;
    text-transform: none;
}

.cb-dsa-page .search-box {
    width: 100%;
    margin: 0 0 16px;
    padding: 11px 13px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #ffffff;
    color: #334155;
    font: inherit;
    font-size: 14px;
}

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

.cb-dsa-page .sidebar details {
    margin: 3px 0;
}

.cb-dsa-page .sidebar summary {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 12px;
    border-radius: 8px;
    color: #334155;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.45;
    cursor: pointer;
    list-style: none;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.cb-dsa-page .sidebar summary::-webkit-details-marker {
    display: none;
}

.cb-dsa-page .sidebar summary::before {
    content: "▸";
    display: inline-block;
    width: 18px;
    flex: 0 0 18px;
    color: #64748b;
    transition: transform 0.2s ease;
}

.cb-dsa-page .sidebar details[open] > summary::before {
    transform: rotate(90deg);
}

.cb-dsa-page .sidebar summary:hover {
    color: #0f5e9c;
    background: #f1f7fc;
    transform: translateX(2px);
}

.cb-dsa-page .sidebar details[open] > summary {
    padding-left: 9px;
    border-left: 3px solid var(--cb-dsa-gold);
    background: #eaf4fc;
    color: #0f5e9c;
}

.cb-dsa-page .sidebar a {
    display: flex;
    align-items: center;
    min-height: 36px;
    margin: 2px 0 2px 16px;
    padding: 7px 10px;
    border-radius: 8px;
    color: #334155;
    font-size: 13px;
    line-height: 1.4;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.cb-dsa-page .sidebar a:hover {
    color: #0f5e9c;
    background: #f1f7fc;
    transform: translateX(2px);
}

.cb-dsa-page .sidebar a.active {
    padding-left: 7px;
    border-left: 3px solid var(--cb-dsa-gold);
    background: #eaf4fc;
    color: #0f5e9c;
    font-weight: 700;
}

.cb-dsa-page .main-content {
    flex: 1 1 auto;
    width: auto;
    max-width: 1180px;
    min-width: 0;
    margin: 0 auto;
    padding: 26px 30px;
}

.cb-dsa-page .main-content > *,
.cb-dsa-page .content-section,
.cb-dsa-page .content-card,
.cb-dsa-page .subject-hero {
    max-width: 100%;
    min-width: 0;
}

/* ---------- Subject introduction ---------- */

.cb-dsa-page .subject-hero {
    margin-bottom: 24px;
}

.cb-dsa-page .subject-label,
.cb-dsa-page .section-label {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--cb-dsa-gold);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1.5px;
}

.cb-dsa-page .subject-hero .page-title {
    margin: 0 0 10px;
    color: #0f172a;
    font-size: 38px;
    font-weight: 800;
    line-height: 1.25;
}

.cb-dsa-page .subject-hero .page-description {
    max-width: 800px;
    margin: 0;
    color: var(--cb-dsa-muted);
    line-height: 1.7;
}

.cb-dsa-page .content-section {
    margin: 28px 0;
}

.cb-dsa-page .section-heading {
    margin-bottom: 16px;
}

.cb-dsa-page .section-heading h2 {
    margin: 4px 0 7px;
    color: var(--cb-dsa-heading);
    font-weight: 800;
    line-height: 1.35;
}

.cb-dsa-page .section-heading p {
    margin: 0;
    color: var(--cb-dsa-muted);
    line-height: 1.7;
}

/* ---------- Compact C lesson cards ---------- */

.cb-dsa-page .content-card {
    padding: 20px 22px;
    margin-bottom: 16px;
    border: 1px solid var(--cb-dsa-border);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.04);
}

.cb-dsa-page .content-card > h2,
.cb-dsa-page .content-card > h3,
.cb-dsa-page .content-card > h4,
.cb-dsa-page .cb-visible-program-heading {
    color: var(--cb-dsa-heading);
}

.cb-dsa-page .content-card > h2 {
    margin: 0 0 10px;
    font-weight: 800;
    line-height: 1.35;
}

.cb-dsa-page .content-card > h3 {
    margin: 15px 0 7px;
    font-weight: 800;
    line-height: 1.4;
}

.cb-dsa-page .content-card > h4 {
    margin: 13px 0 7px;
    font-weight: 700;
    line-height: 1.4;
}

.cb-dsa-page .content-card p,
.cb-dsa-page .content-card li {
    line-height: 1.62;
}

.cb-dsa-page .content-card ul,
.cb-dsa-page .content-card ol {
    padding-left: 24px;
    margin: 10px 0;
}

.cb-dsa-page .content-card li + li {
    margin-top: 5px;
}

/* ---------- C code blocks and inline code ---------- */

.cb-dsa-page .main-content pre {
    max-width: 100%;
    margin: 10px 0;
    padding: 12px;
    overflow-x: auto;
    border: 1px solid #1e293b;
    border-radius: 7px;
    background: #0f172a;
    box-shadow: 0 5px 18px rgba(15, 23, 42, 0.08);
    -webkit-overflow-scrolling: touch;
}

.cb-dsa-page .main-content pre code {
    display: block;
    padding: 0;
    background: transparent;
    color: #e2e8f0;
    font-family: Consolas, "Courier New", monospace;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre;
}

.cb-dsa-page .main-content code:not(pre code) {
    padding: 2px 6px;
    border-radius: 5px;
    background: #f1f5f9;
    color: #0f5e9c;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.92em;
}

.cb-dsa-page .main-content pre::-webkit-scrollbar {
    height: 7px;
}

.cb-dsa-page .main-content pre::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: #475569;
}

/* ---------- C lesson callouts ---------- */

.cb-dsa-page .example-box,
.cb-dsa-page .key-idea-box,
.cb-dsa-page .example-presentation,
.cb-dsa-page .tip-box,
.cb-dsa-page .warning-box,
.cb-dsa-page .formula-box,
.cb-dsa-page .output-box,
.cb-dsa-page .io-box {
    padding: 13px 14px;
    margin: 10px 0;
    border-radius: 7px;
}

.cb-dsa-page .example-box,
.cb-dsa-page .key-idea-box {
    border: 1px solid var(--cb-dsa-soft-border);
    border-left: 4px solid #8cc8f0;
    background: var(--cb-dsa-soft);
    color: #334155;
}

.cb-dsa-page .example-presentation {
    border: 1px solid var(--cb-dsa-soft-border);
    border-left: 4px solid var(--cb-dsa-gold);
    background: var(--cb-dsa-soft);
    color: #334155;
}

.cb-dsa-page .tip-box {
    border-left: 5px solid #16a34a;
    background: #ecfdf5;
}

.cb-dsa-page .warning-box {
    border-left: 5px solid #f97316;
    background: #fff7ed;
}

.cb-dsa-page .formula-box,
.cb-dsa-page .io-box {
    border: 1px solid var(--cb-dsa-soft-border);
    background: var(--cb-dsa-soft);
}

.cb-dsa-page .key-idea-box h3,
.cb-dsa-page .example-presentation h3 {
    margin-top: 0;
    color: var(--cb-dsa-heading);
}

.cb-dsa-page .key-idea-box p:last-child,
.cb-dsa-page .example-presentation p:last-child {
    margin-bottom: 0;
}

/* ---------- Tables ---------- */

.cb-dsa-page .comparison-table-wrapper,
.cb-dsa-page [class$="-table-wrap"] {
    width: 100%;
    max-width: 100%;
    margin: 14px 0;
    overflow-x: auto;
    border-radius: 10px;
    -webkit-overflow-scrolling: touch;
}

.cb-dsa-page .comparison-table {
    width: 100%;
    border: 1px solid var(--cb-dsa-border);
    border-collapse: collapse;
    background: #ffffff;
}

.cb-dsa-page .comparison-table th,
.cb-dsa-page .comparison-table td {
    padding: 9px 10px;
    border: 1px solid var(--cb-dsa-border);
    text-align: left;
    vertical-align: top;
    line-height: 1.55;
}

.cb-dsa-page .comparison-table th {
    background: #f1f7fc;
    color: #0f172a;
    font-weight: 700;
}

.cb-dsa-page .comparison-table td {
    color: #475569;
}

.cb-dsa-page .comparison-table tr:hover td {
    background: #fafcfe;
}

/* ---------- DSA cards inherit the C radius and spacing ---------- */

.cb-dsa-page .program-box,
.cb-dsa-page .practice-item,
.cb-dsa-page .complexity-item,
.cb-dsa-page .cb-interview-item,
.cb-dsa-page .ll-interview-item,
.cb-dsa-page .cb-practice-workspace,
.cb-dsa-page .llp-card {
    border-radius: 10px;
}

.cb-dsa-page .input-output,
.cb-dsa-page .complexity-list {
    gap: 12px;
    margin: 12px 0;
}

/* Keep every existing visualizer/tracer inside the lesson column. */
.cb-dsa-page .main-content img,
.cb-dsa-page .main-content video,
.cb-dsa-page .main-content svg,
.cb-dsa-page .main-content canvas,
.cb-dsa-page .main-content iframe,
.cb-dsa-page .main-content [class*="visual"],
.cb-dsa-page .main-content [class*="tracer"],
.cb-dsa-page .main-content [class*="practice"] {
    max-width: 100%;
}

/* ---------- Uniform controls already used by DSA logic ---------- */

.cb-dsa-page .cb-dsa-control {
    border: 0;
    border-radius: 8px;
    padding: 9px 12px;
    color: #ffffff;
    font-weight: 800;
    cursor: pointer;
}

.cb-dsa-page .cb-dsa-previous,
.cb-dsa-page .cb-dsa-reset {
    background: var(--cb-dsa-slate);
}

.cb-dsa-page .cb-dsa-next {
    background: var(--cb-dsa-blue);
}

.cb-dsa-page .cb-dsa-auto {
    background: var(--cb-dsa-green);
}

.cb-dsa-page .cb-dsa-pause {
    background: var(--cb-dsa-orange);
}

.cb-dsa-page .cb-dsa-control:disabled {
    background: #94a3b8;
    color: #ffffff;
    cursor: not-allowed;
}

/* ---------- Footer separation used on the C pages ---------- */

.cb-dsa-page .footer {
    position: relative;
    z-index: 30;
    width: 100%;
    margin-left: 0;
    border-top: 18px solid var(--cb-dsa-page);
}

/* ---------- Responsive transfer from C Programming ---------- */

@media (max-width: 1100px) and (min-width: 769px) {
    .cb-dsa-page .sidebar {
        width: 230px;
        flex-basis: 230px;
        padding-left: 10px;
        padding-right: 10px;
    }

    .cb-dsa-page .main-content {
        padding: 24px 16px;
    }
}

@media (max-width: 850px) {
    .cb-dsa-page .top-header {
        flex-direction: column;
        justify-content: center;
        height: auto;
        min-height: 0;
        gap: 10px;
        padding: 14px 15px;
    }

    .cb-dsa-page .top-header .logo {
        height: 58px;
        margin-right: 0;
    }

    .cb-dsa-page .codebhavya-new-logo .main-logo {
        width: 58px;
        height: 58px;
        margin-right: 8px;
    }

    .cb-dsa-page .top-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 4px 8px;
    }
}

@media (max-width: 768px) {
    .cb-dsa-page .docs-layout {
        display: flex;
        flex-direction: column;
        width: 100%;
        min-height: 0;
    }

    .cb-dsa-page .sidebar {
        position: relative;
        top: auto;
        width: 100%;
        max-width: 100%;
        height: auto;
        max-height: none;
        flex-basis: auto;
        padding: 16px 8px;
        overflow: visible;
        border-right: 0;
        border-bottom: 1px solid var(--cb-dsa-border);
    }

    .cb-dsa-page .main-content {
        width: 100%;
        max-width: 100%;
        margin: 0;
        padding: 16px 5px 28px;
    }

    .cb-dsa-page .subject-hero {
        margin-bottom: 22px;
        padding: 0 9px;
    }

    .cb-dsa-page .subject-hero .page-title {
        font-size: 30px;
    }

    .cb-dsa-page .content-section {
        width: 100%;
        margin: 24px 0;
    }

    .cb-dsa-page .section-heading {
        padding: 0 9px;
    }

    .cb-dsa-page .content-card {
        width: 100%;
        padding: 18px 14px;
        margin-bottom: 18px;
    }

    .cb-dsa-page .input-output,
    .cb-dsa-page .complexity-list {
        grid-template-columns: 1fr;
    }

    .cb-dsa-page input,
    .cb-dsa-page select,
    .cb-dsa-page textarea,
    .cb-dsa-page button {
        max-width: 100%;
    }

    .cb-dsa-page .footer {
        border-top: 0;
    }
}

@media (max-width: 520px) {
    .cb-dsa-page .top-header .logo {
        font-size: 24px;
    }

    .cb-dsa-page .top-nav a {
        padding: 7px 8px;
        font-size: 13px;
    }

    .cb-dsa-page .sidebar {
        padding-left: 6px;
        padding-right: 6px;
    }

    .cb-dsa-page .main-content {
        padding: 8px 5px 24px;
    }

    .cb-dsa-page .content-card {
        padding: 15px 10px;
        border-radius: 10px;
    }

    .cb-dsa-page .content-card > h2 {
        font-size: 22px;
    }

    .cb-dsa-page .content-card > h3,
    .cb-dsa-page .section-heading h2 {
        font-size: 20px;
    }
}

/* ================================================================
   C Programming match: Solve It Yourself coding workspace
   These rules only restyle the existing DSA practice UI. The HTML,
   exercise content, editor values and JavaScript behavior stay intact.
   ================================================================ */

.cb-dsa-page .cb-practice-workspace {
    position: relative !important;
    margin-top: 12px !important;
    padding: 76px 12px 12px !important;
    overflow: hidden !important;
    border: 1px solid #cbd5e1 !important;
    border-radius: 10px !important;
    background: #0f172a !important;
    box-shadow: none !important;
}

.cb-dsa-page .cb-practice-workspace::before {
    content: "INTERACTIVE CODING PRACTICE" !important;
    position: absolute !important;
    top: 0 !important;
    right: 0 !important;
    left: 0 !important;
    display: flex !important;
    align-items: center !important;
    height: 64px !important;
    box-sizing: border-box !important;
    padding: 0 230px 0 22px !important;
    border-bottom: 1px solid #e2e8f0 !important;
    background-color: #ffffff !important;
    background-image: url("../images/codebhavya-icon-32.png") !important;
    background-repeat: no-repeat !important;
    background-position: calc(100% - 167px) center !important;
    background-size: 34px 34px !important;
    color: #2563eb !important;
    font-family: inherit !important;
    font-size: 12px !important;
    font-weight: 900 !important;
    letter-spacing: .16em !important;
    line-height: 1 !important;
    text-transform: uppercase !important;
    z-index: 1 !important;
}

.cb-dsa-page .cb-practice-workspace::after {
    content: "CodeBhavya" !important;
    position: absolute !important;
    top: 17px !important;
    right: 22px !important;
    color: transparent !important;
    background: linear-gradient(90deg, #2563eb 0%, #2563eb 43%, #f59e0b 43%, #f59e0b 100%) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    font-family: inherit !important;
    font-size: 21px !important;
    font-weight: 900 !important;
    line-height: 30px !important;
    letter-spacing: -.02em !important;
    z-index: 2 !important;
}

.cb-dsa-page .cb-practice-title {
    margin: 0 0 10px !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
    color: #f8fafc !important;
    font-size: 18px !important;
    font-weight: 800 !important;
    line-height: 1.35 !important;
}

.cb-dsa-page .cb-practice-grid {
    display: grid !important;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr) !important;
    gap: 10px !important;
}

.cb-dsa-page .cb-practice-panel {
    min-width: 0 !important;
    padding: 10px !important;
    border: 1px solid #334155 !important;
    border-radius: 8px !important;
    background: #111827 !important;
    box-shadow: none !important;
}

.cb-dsa-page .cb-practice-panel h4 {
    margin: 0 0 8px !important;
    color: #f1f5f9 !important;
    font-size: 13px !important;
    font-weight: 800 !important;
    line-height: 1.35 !important;
}

.cb-dsa-page .cb-practice-panel h4:not(:first-child) {
    margin-top: 13px !important;
}

.cb-dsa-page .cb-code-editor,
.cb-dsa-page .cb-practice-input {
    width: 100% !important;
    box-sizing: border-box !important;
    border: 1px solid #475569 !important;
    border-radius: 8px !important;
    background: #020617 !important;
    color: #f8fafc !important;
    caret-color: #ffffff !important;
    font-family: Consolas, "Courier New", monospace !important;
    font-size: 13px !important;
    line-height: 1.55 !important;
    box-shadow: none !important;
}

.cb-dsa-page .cb-code-editor:focus,
.cb-dsa-page .cb-practice-input:focus {
    border-color: #60a5fa !important;
    outline: 2px solid rgba(37, 99, 235, .18) !important;
    outline-offset: 1px !important;
}

.cb-dsa-page .cb-practice-input::placeholder,
.cb-dsa-page .cb-code-editor::placeholder {
    color: #94a3b8 !important;
}

.cb-dsa-page .cb-practice-output {
    min-height: 82px !important;
    border: 1px solid #475569 !important;
    border-radius: 8px !important;
    background: #020617 !important;
    color: #f8fafc !important;
    box-shadow: none !important;
}

.cb-dsa-page .cb-test-results {
    gap: 6px !important;
}

.cb-dsa-page .cb-test-row {
    border: 1px solid #334155 !important;
    border-radius: 7px !important;
    background: #0b1220 !important;
    color: #e2e8f0 !important;
}

.cb-dsa-page .cb-test-row.pass {
    border-color: #22c55e !important;
    background: rgba(20, 83, 45, .48) !important;
    color: #dcfce7 !important;
}

.cb-dsa-page .cb-test-row.fail {
    border-color: #ef4444 !important;
    background: rgba(127, 29, 29, .45) !important;
    color: #fee2e2 !important;
}

.cb-dsa-page .cb-practice-actions {
    gap: 10px !important;
    margin-top: 12px !important;
}

.cb-dsa-page .cb-practice-actions button {
    min-height: 38px !important;
    padding: 8px 13px !important;
    border: 0 !important;
    border-radius: 8px !important;
    color: #ffffff !important;
    font-weight: 800 !important;
    box-shadow: none !important;
}

.cb-dsa-page .cb-run-btn {
    background: #159447 !important;
}

.cb-dsa-page .cb-run-btn:hover {
    background: #15803d !important;
}

.cb-dsa-page .cb-check-btn {
    background: #2563eb !important;
}

.cb-dsa-page .cb-check-btn:hover {
    background: #1d4ed8 !important;
}

.cb-dsa-page .cb-reset-btn {
    background: #64748b !important;
}

.cb-dsa-page .cb-reset-btn:hover {
    background: #475569 !important;
}

.cb-dsa-page .cb-practice-actions button:disabled {
    background: #475569 !important;
    color: #cbd5e1 !important;
}

.cb-dsa-page .cb-practice-score {
    margin-top: 12px !important;
    padding: 12px 0 0 !important;
    border: 0 !important;
    border-top: 1px solid #334155 !important;
    border-radius: 0 !important;
    background: transparent !important;
}

.cb-dsa-page .cb-practice-score-grid {
    gap: 8px !important;
}

.cb-dsa-page .cb-score-item {
    padding: 9px !important;
    border: 1px solid #334155 !important;
    border-radius: 8px !important;
    background: #0b1220 !important;
    color: #f8fafc !important;
}

.cb-dsa-page .cb-score-item strong {
    color: #93c5fd !important;
    font-size: 10px !important;
    font-weight: 500 !important;
    letter-spacing: .08em !important;
}

.cb-dsa-page .cb-score-item span {
    margin-top: 4px !important;
    color: #ffffff !important;
    font-size: 17px !important;
    font-weight: 900 !important;
}

.cb-dsa-page .cb-practice-message {
    margin-top: 10px !important;
    padding: 10px !important;
    border: 1px solid #334e8d !important;
    border-radius: 8px !important;
    background: #1e3a8a !important;
    color: #ffffff !important;
}

.cb-dsa-page .cb-practice-note {
    color: #cbd5e1 !important;
}

@media (max-width: 900px) {
    .cb-dsa-page .cb-practice-grid {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 620px) {
    .cb-dsa-page .cb-practice-workspace {
        padding-top: 68px !important;
    }

    .cb-dsa-page .cb-practice-workspace::before {
        height: 56px !important;
        padding: 0 150px 0 13px !important;
        background-position: calc(100% - 122px) center !important;
        background-size: 27px 27px !important;
        font-size: 9px !important;
        letter-spacing: .1em !important;
    }

    .cb-dsa-page .cb-practice-workspace::after {
        top: 13px !important;
        right: 12px !important;
        font-size: 16px !important;
        line-height: 28px !important;
    }

    .cb-dsa-page .cb-practice-title {
        font-size: 16px !important;
    }

    .cb-dsa-page .cb-practice-score-grid {
        grid-template-columns: 1fr !important;
    }
}

/* ================================================================
   ALL DSA PAGES: common C-style Program Tracing brand header
   Covers Searching, Sorting, Linked List, Stack, Queue, Trees and Graphs.
   ================================================================ */

.cb-dsa-page :is(
    .cb-binary-tracer,
    .ll-tracer,
    .stack-tracer,
    .queue-tracer,
    .tree-tracer
) {
    position: relative !important;
    padding-top: 76px !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    border: 1px solid #dbe3ec !important;
    border-radius: 12px !important;
    background: linear-gradient(
        to bottom,
        #ffffff 0,
        #ffffff 64px,
        #f8fafc 64px,
        #f8fafc 100%
    ) !important;
}

.cb-dsa-page :is(
    .cb-binary-tracer,
    .ll-tracer,
    .stack-tracer,
    .queue-tracer,
    .tree-tracer
)::before {
    content: "" !important;
    position: absolute !important;
    top: 11px !important;
    right: 140px !important;
    width: 40px !important;
    height: 40px !important;
    border: 1px solid #dbe3ec !important;
    border-radius: 10px !important;
    background-color: #ffffff !important;
    background-image: url("../images/codebhavya-icon-32.png") !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    background-size: 28px 28px !important;
    box-shadow: 0 5px 16px rgba(2, 12, 27, .08) !important;
    z-index: 3 !important;
}

.cb-dsa-page :is(
    .cb-binary-tracer,
    .ll-tracer,
    .stack-tracer,
    .queue-tracer,
    .tree-tracer
)::after {
    content: "CodeBhavya" !important;
    position: absolute !important;
    top: 17px !important;
    right: 18px !important;
    color: transparent !important;
    background: linear-gradient(
        90deg,
        #2563eb 0%,
        #2563eb 43%,
        #f59e0b 43%,
        #f59e0b 100%
    ) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    font-family: Arial, Helvetica, sans-serif !important;
    font-size: 20px !important;
    font-weight: 900 !important;
    line-height: 30px !important;
    letter-spacing: -.02em !important;
    white-space: nowrap !important;
    z-index: 4 !important;
}

.cb-dsa-page :is(
    .cb-binary-title,
    .ll-tracer-title,
    .stack-tracer-title,
    .queue-tracer-title,
    .tree-tracer-title
)::before {
    content: "PROGRAM TRACING" !important;
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    display: flex !important;
    align-items: center !important;
    height: 64px !important;
    padding: 0 22px !important;
    color: #2563eb !important;
    font-family: Arial, Helvetica, sans-serif !important;
    font-size: 12px !important;
    font-weight: 900 !important;
    letter-spacing: .15em !important;
    line-height: 1 !important;
    text-transform: uppercase !important;
    white-space: nowrap !important;
    z-index: 2 !important;
}

.cb-dsa-page :is(
    .cb-binary-title,
    .ll-tracer-title,
    .stack-tracer-title,
    .queue-tracer-title,
    .tree-tracer-title
) {
    color: #0d1b2a !important;
    font-weight: 900 !important;
}

/* ================================================================
   ALL DSA PAGES: common C-style Solve It Yourself workspace
   ================================================================ */

.cb-dsa-page :is(
    .cb-practice-workspace,
    .llp-workspace,
    .stack-practice-workspace,
    .queue-practice-workspace,
    .tree-practice-workspace
) {
    position: relative !important;
    margin-top: 12px !important;
    padding: 76px 12px 12px !important;
    overflow: hidden !important;
    border: 1px solid #cbd5e1 !important;
    border-radius: 10px !important;
    background: #0f172a !important;
    box-shadow: none !important;
}

.cb-dsa-page :is(
    .cb-practice-workspace,
    .llp-workspace,
    .stack-practice-workspace,
    .queue-practice-workspace,
    .tree-practice-workspace
)::before {
    content: "INTERACTIVE CODING PRACTICE" !important;
    position: absolute !important;
    top: 0 !important;
    right: 0 !important;
    left: 0 !important;
    display: flex !important;
    align-items: center !important;
    height: 64px !important;
    padding: 0 230px 0 22px !important;
    border-bottom: 1px solid #e2e8f0 !important;
    background-color: #ffffff !important;
    background-image: url("../images/codebhavya-icon-32.png") !important;
    background-repeat: no-repeat !important;
    background-position: calc(100% - 167px) center !important;
    background-size: 34px 34px !important;
    color: #2563eb !important;
    font-family: Arial, Helvetica, sans-serif !important;
    font-size: 12px !important;
    font-weight: 900 !important;
    letter-spacing: .16em !important;
    line-height: 1 !important;
    text-transform: uppercase !important;
    z-index: 1 !important;
}

.cb-dsa-page :is(
    .cb-practice-workspace,
    .llp-workspace,
    .stack-practice-workspace,
    .queue-practice-workspace,
    .tree-practice-workspace
)::after {
    content: "CodeBhavya" !important;
    position: absolute !important;
    top: 17px !important;
    right: 22px !important;
    color: transparent !important;
    background: linear-gradient(
        90deg,
        #2563eb 0%,
        #2563eb 43%,
        #f59e0b 43%,
        #f59e0b 100%
    ) !important;
    -webkit-background-clip: text !important;
    background-clip: text !important;
    font-family: Arial, Helvetica, sans-serif !important;
    font-size: 21px !important;
    font-weight: 900 !important;
    line-height: 30px !important;
    letter-spacing: -.02em !important;
    white-space: nowrap !important;
    z-index: 2 !important;
}

.cb-dsa-page :is(
    .cb-practice-title,
    .llp-workspace-title,
    .stack-practice-workspace-title,
    .queue-practice-workspace-title,
    .tree-practice-workspace-title
) {
    margin: 0 0 10px !important;
    padding: 0 !important;
    border: 0 !important;
    background: transparent !important;
    color: #f8fafc !important;
    font-size: 18px !important;
    font-weight: 800 !important;
    line-height: 1.35 !important;
}

.cb-dsa-page :is(
    .cb-practice-grid,
    .llp-editor-grid,
    .stack-practice-editor-grid,
    .queue-practice-editor-grid,
    .tree-practice-editor-grid
) {
    display: grid !important;
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr) !important;
    gap: 10px !important;
}

.cb-dsa-page :is(
    .cb-practice-panel,
    .llp-panel,
    .stack-practice-panel,
    .queue-practice-panel,
    .tree-practice-panel
) {
    min-width: 0 !important;
    padding: 10px !important;
    border: 1px solid #334155 !important;
    border-radius: 8px !important;
    background: #111827 !important;
    box-shadow: none !important;
}

.cb-dsa-page :is(
    .cb-practice-panel h4,
    .llp-panel label,
    .stack-practice-panel label,
    .queue-practice-panel label,
    .tree-practice-panel label
) {
    color: #f1f5f9 !important;
    font-size: 13px !important;
    font-weight: 800 !important;
    line-height: 1.35 !important;
}

.cb-dsa-page :is(
    .cb-code-editor,
    .cb-practice-input,
    .llp-code,
    .llp-input,
    .stack-practice-code,
    .stack-practice-input,
    .queue-practice-code,
    .queue-practice-input,
    .tree-practice-code,
    .tree-practice-input
) {
    width: 100% !important;
    box-sizing: border-box !important;
    border: 1px solid #475569 !important;
    border-radius: 8px !important;
    background: #020617 !important;
    color: #f8fafc !important;
    caret-color: #ffffff !important;
    font-family: Consolas, "Courier New", monospace !important;
    font-size: 13px !important;
    line-height: 1.55 !important;
    box-shadow: none !important;
}

.cb-dsa-page :is(
    .cb-code-editor,
    .cb-practice-input,
    .llp-code,
    .llp-input,
    .stack-practice-code,
    .stack-practice-input,
    .queue-practice-code,
    .queue-practice-input,
    .tree-practice-code,
    .tree-practice-input
):focus {
    border-color: #60a5fa !important;
    outline: 2px solid rgba(37, 99, 235, .18) !important;
    outline-offset: 1px !important;
}

.cb-dsa-page :is(
    .cb-practice-output,
    .llp-output,
    .stack-practice-output,
    .queue-practice-output,
    .tree-practice-output
) {
    border: 1px solid #475569 !important;
    border-radius: 8px !important;
    background: #020617 !important;
    color: #f8fafc !important;
    box-shadow: none !important;
}

.cb-dsa-page :is(
    .cb-practice-actions,
    .llp-action-row,
    .stack-practice-actions,
    .queue-practice-actions,
    .tree-practice-actions
) {
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 10px !important;
    margin-top: 12px !important;
}

.cb-dsa-page :is(
    .cb-practice-actions button,
    .llp-action-row button,
    .stack-practice-actions button,
    .queue-practice-actions button,
    .tree-practice-actions button
) {
    min-height: 38px !important;
    padding: 8px 13px !important;
    border: 0 !important;
    border-radius: 8px !important;
    color: #ffffff !important;
    font-weight: 800 !important;
    box-shadow: none !important;
}

.cb-dsa-page :is(
    .cb-run-btn,
    .llp-run-btn,
    .stack-run-btn,
    .queue-run-btn,
    .tree-run-btn
) {
    background: #159447 !important;
}

.cb-dsa-page :is(
    .cb-check-btn,
    .llp-check-btn,
    .stack-check-btn,
    .queue-check-btn,
    .tree-check-btn
) {
    background: #2563eb !important;
}

.cb-dsa-page :is(
    .cb-reset-btn,
    .llp-reset-btn,
    .stack-reset-btn,
    .queue-reset-btn,
    .tree-reset-btn
) {
    background: #64748b !important;
}

.cb-dsa-page :is(
    .cb-test-row,
    .llp-test,
    .stack-practice-test,
    .queue-practice-test,
    .tree-practice-test
) {
    border: 1px solid #334155 !important;
    border-radius: 7px !important;
    background: #0b1220 !important;
    color: #e2e8f0 !important;
}

.cb-dsa-page :is(
    .cb-test-row.pass,
    .llp-test.pass,
    .stack-practice-test.pass,
    .queue-practice-test.pass,
    .tree-practice-test.pass
) {
    border-color: #22c55e !important;
    background: rgba(20, 83, 45, .48) !important;
    color: #dcfce7 !important;
}

.cb-dsa-page :is(
    .cb-test-row.fail,
    .llp-test.fail,
    .stack-practice-test.fail,
    .queue-practice-test.fail,
    .tree-practice-test.fail
) {
    border-color: #ef4444 !important;
    background: rgba(127, 29, 29, .45) !important;
    color: #fee2e2 !important;
}

.cb-dsa-page :is(
    .cb-practice-score,
    .llp-score-box,
    .stack-practice-score-grid,
    .queue-practice-score-grid,
    .tree-practice-score-grid
) {
    display: grid !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 8px !important;
    margin-top: 12px !important;
    padding: 12px 0 0 !important;
    border: 0 !important;
    border-top: 1px solid #334155 !important;
    border-radius: 0 !important;
    background: transparent !important;
}

.cb-dsa-page .cb-practice-score-grid {
    display: contents !important;
}

.cb-dsa-page :is(
    .cb-score-item,
    .llp-score-box > div,
    .stack-practice-score-grid > div,
    .queue-practice-score-grid > div,
    .tree-practice-score-grid > div
) {
    padding: 9px !important;
    border: 1px solid #334155 !important;
    border-radius: 8px !important;
    background: #0b1220 !important;
    color: #f8fafc !important;
    text-align: center !important;
}

.cb-dsa-page :is(
    .cb-score-item strong,
    .llp-score-box strong,
    .stack-practice-score-grid strong,
    .queue-practice-score-grid strong,
    .tree-practice-score-grid strong
) {
    display: block !important;
    color: #93c5fd !important;
    font-size: 10px !important;
    font-weight: 500 !important;
    letter-spacing: .08em !important;
    text-transform: uppercase !important;
}

.cb-dsa-page :is(
    .cb-score-item span,
    .llp-score-box span,
    .stack-practice-score-grid span,
    .queue-practice-score-grid span,
    .tree-practice-score-grid span
) {
    display: block !important;
    margin-top: 4px !important;
    color: #ffffff !important;
    font-size: 17px !important;
    font-weight: 900 !important;
}

.cb-dsa-page :is(
    .cb-practice-message,
    .llp-message,
    .stack-practice-message,
    .queue-practice-message,
    .tree-practice-message
) {
    margin-top: 10px !important;
    padding: 10px !important;
    border: 1px solid #334e8d !important;
    border-radius: 8px !important;
    background: #1e3a8a !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    text-align: center !important;
}

@media (max-width: 900px) {
    .cb-dsa-page :is(
        .cb-practice-grid,
        .llp-editor-grid,
        .stack-practice-editor-grid,
        .queue-practice-editor-grid,
        .tree-practice-editor-grid
    ) {
        grid-template-columns: 1fr !important;
    }
}

@media (max-width: 620px) {
    .cb-dsa-page :is(
        .cb-binary-tracer,
        .ll-tracer,
        .stack-tracer,
        .queue-tracer,
        .tree-tracer
    ) {
        padding-top: 66px !important;
        background: linear-gradient(
            to bottom,
            #ffffff 0,
            #ffffff 56px,
            #f8fafc 56px,
            #f8fafc 100%
        ) !important;
    }

    .cb-dsa-page :is(
        .cb-binary-tracer,
        .ll-tracer,
        .stack-tracer,
        .queue-tracer,
        .tree-tracer
    )::before {
        top: 11px !important;
        right: 105px !important;
        width: 34px !important;
        height: 34px !important;
        background-size: 24px 24px !important;
    }

    .cb-dsa-page :is(
        .cb-binary-tracer,
        .ll-tracer,
        .stack-tracer,
        .queue-tracer,
        .tree-tracer
    )::after {
        top: 13px !important;
        right: 12px !important;
        font-size: 14px !important;
        line-height: 28px !important;
    }

    .cb-dsa-page :is(
        .cb-binary-title,
        .ll-tracer-title,
        .stack-tracer-title,
        .queue-tracer-title,
        .tree-tracer-title
    )::before {
        height: 56px !important;
        padding: 0 12px !important;
        font-size: 9px !important;
        letter-spacing: .1em !important;
    }

    .cb-dsa-page :is(
        .cb-practice-workspace,
        .llp-workspace,
        .stack-practice-workspace,
        .queue-practice-workspace,
        .tree-practice-workspace
    ) {
        padding-top: 68px !important;
    }

    .cb-dsa-page :is(
        .cb-practice-workspace,
        .llp-workspace,
        .stack-practice-workspace,
        .queue-practice-workspace,
        .tree-practice-workspace
    )::before {
        height: 56px !important;
        padding: 0 150px 0 13px !important;
        background-position: calc(100% - 122px) center !important;
        background-size: 27px 27px !important;
        font-size: 9px !important;
        letter-spacing: .1em !important;
    }

    .cb-dsa-page :is(
        .cb-practice-workspace,
        .llp-workspace,
        .stack-practice-workspace,
        .queue-practice-workspace,
        .tree-practice-workspace
    )::after {
        top: 13px !important;
        right: 12px !important;
        font-size: 16px !important;
        line-height: 28px !important;
    }

    .cb-dsa-page :is(
        .cb-practice-title,
        .llp-workspace-title,
        .stack-practice-workspace-title,
        .queue-practice-workspace-title,
        .tree-practice-workspace-title
    ) {
        font-size: 16px !important;
    }

    .cb-dsa-page :is(
        .cb-practice-score,
        .llp-score-box,
        .stack-practice-score-grid,
        .queue-practice-score-grid,
        .tree-practice-score-grid
    ) {
        grid-template-columns: 1fr !important;
    }
}

/* ============================================================
   COMPACT TOPIC NAVIGATION
   Whole button text is the navigation label.
   ============================================================ */

.cb-topic-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    margin: 12px 0 16px;
}

.cb-topic-nav-btn {
    display: inline-flex;
    align-items: center;
    width: auto;
    max-width: 48%;
    padding: 8px 12px;
    border-radius: 7px;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.35;
    transition: transform .15s ease, box-shadow .15s ease;
}

.cb-topic-nav-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 12px rgba(15, 23, 42, .08);
}

/* Previous = slate */
.cb-topic-nav-prev {
    background: #e2e8f0;
    color: #334155;
    border: 1px solid #cbd5e1;
}

/* Next = soft blue */
.cb-topic-nav-next {
    background: #dbeafe;
    color: #1d4ed8;
    border: 1px solid #bfdbfe;
    margin-left: auto;
}

@media (max-width: 700px) {
    .cb-topic-navigation {
        flex-direction: column;
        align-items: stretch;
    }

    .cb-topic-nav-btn {
        max-width: none;
        justify-content: center;
        text-align: center;
    }

    .cb-topic-nav-next {
        margin-left: 0;
    }
}