/*
 * SQL Learning Platform - Tutorial CSS
 * ============================================================
 * TUTORIAL V3
 *
 * Scope
 * -----
 * All selectors are tutorial-specific so this stylesheet does not
 * intentionally modify Playground, Challenge or Sandbox styling.
 * ============================================================
 */

.tutorial-container {
    display: flex;
    min-height: calc(100vh - 80px);
    background: #0b1220;
    color: #e5e7eb;
}


/* ============================================================
 * GLOBAL PLATFORM HEADER / BRAND
 * ------------------------------------------------------------
 * This section mirrors the visual identity used on the homepage.
 * Selectors are scoped to the tutorial header so the existing lesson,
 * roadmap, editor and result styles remain untouched.
 * ============================================================ */

.tutorial-site-header {
    position: sticky;
    top: 0;
    z-index: 1000;

    min-height: 72px;
    padding: 0 clamp(16px, 5vw, 64px);

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;

    box-sizing: border-box;
    border-bottom: 1px solid rgba(120, 170, 230, 0.18);
    background: rgba(7, 17, 31, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.tutorial-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 0;

    color: #edf5ff;
    text-decoration: none;
}

.tutorial-brand:focus-visible,
.tutorial-main-navigation a:focus-visible {
    outline: 2px solid #60a5fa;
    outline-offset: 4px;
    border-radius: 8px;
}

.tutorial-brand .brand-mark {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;

    display: grid;
    place-items: center;

    border-radius: 12px;
    background: linear-gradient(135deg, #35a7ff, #7773ff);

    color: #04101e;
    font-weight: 900;
    font-size: 13px;
    line-height: 1;
}

.tutorial-brand .brand-copy {
    min-width: 0;
}

.tutorial-brand strong {
    display: block;
    color: #edf5ff;
    font-size: 16px;
    line-height: 1.1;
    white-space: nowrap;
}

.tutorial-brand small {
    display: block;
    margin-top: 3px;

    color: #9eb1c8;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.tutorial-main-navigation {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 20px;
}

.tutorial-main-navigation a {
    color: #9eb1c8;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.2;

    transition: color 0.2s ease, transform 0.2s ease;
}

.tutorial-main-navigation a:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

.tutorial-main-navigation a[aria-current="page"] {
    color: #ffffff;
    font-weight: 800;
}

@media (max-width: 900px) {
    .tutorial-site-header {
        padding: 10px 18px;
        align-items: flex-start;
        flex-wrap: wrap;
    }

    .tutorial-main-navigation {
        width: 100%;
        justify-content: flex-start;
        gap: 12px 18px;
        padding-bottom: 3px;
    }
}

@media (max-width: 600px) {
    .tutorial-site-header {
        min-height: 64px;
        padding: 10px 14px;
        gap: 10px;
    }

    .tutorial-brand .brand-mark {
        width: 40px;
        height: 40px;
        flex-basis: 40px;
    }

    .tutorial-brand strong {
        font-size: 15px;
    }

    .tutorial-main-navigation {
        gap: 10px 14px;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 5px;
        scrollbar-width: thin;
    }

    .tutorial-main-navigation a {
        flex: 0 0 auto;
        font-size: 13px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tutorial-main-navigation a {
        transition: none;
    }
}

/* ============================================================
 * LEFT ROADMAP / COLLAPSIBLE TRACKS
 * ============================================================ */

.tutorial-sidebar {
    width: 320px;
    flex: 0 0 320px;
    background: #111827;
    border-right: 1px solid #273449;
    padding: 22px 16px;
    position: sticky;
    top: 0;
    height: calc(100vh - 80px);
    overflow-y: auto;
}

.tutorial-sidebar h2 {
    margin: 0 0 16px;
    font-size: 1.2rem;
}

.tutorial-sidebar > ul,
.tutorial-sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.tutorial-track-group {
    margin-bottom: 10px;
}

.tutorial-track-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 13px;
    border: 1px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    color: #dbeafe;
    background: rgba(30, 41, 59, 0.5);
    transition: 0.2s ease;
}

.tutorial-track-link:hover,
.tutorial-track-link.active {
    background: rgba(37, 99, 235, 0.18);
    border-color: rgba(96, 165, 250, 0.35);
}

.tutorial-track-title {
    font-weight: 800;
    line-height: 1.3;
}

.tutorial-collapse-button {
    border: 0;
    background: transparent;
    color: #bfdbfe;
    cursor: pointer;
    font-size: 1rem;
    padding: 3px 6px;
}

.tutorial-track-lessons {
    display: grid;
    grid-template-rows: 1fr;
    transition: grid-template-rows 0.25s ease, opacity 0.25s ease;
    opacity: 1;
}

.tutorial-track-group.is-collapsed .tutorial-track-lessons {
    grid-template-rows: 0fr;
    opacity: 0;
    overflow: hidden;
}

.tutorial-track-lessons > ul {
    min-height: 0;
    overflow: hidden;
    padding: 7px 0 2px 8px;
}

.tutorial-lesson-link {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px 10px;
    margin: 2px 0;
    border-radius: 9px;
    color: #94a3b8;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.35;
    transition: 0.18s ease;
}

.tutorial-lesson-link:hover {
    color: #e0f2fe;
    background: rgba(59, 130, 246, 0.12);
}

.tutorial-lesson-link.active {
    color: #ffffff;
    background: rgba(37, 99, 235, 0.28);
}

.tutorial-lesson-number {
    min-width: 22px;
    height: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.13);
    font-size: 0.72rem;
}

/* ============================================================
 * MAIN CONTENT
 * ============================================================ */

.tutorial-content {
    flex: 1;
    min-width: 0;
    max-width: 1100px;
    margin: 0 auto;
    padding: 34px clamp(18px, 4vw, 54px) 70px;
}

.tutorial-track-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 18px 20px;
    margin-bottom: 22px;
    border: 1px solid #2b3a50;
    border-radius: 16px;
    background: linear-gradient(
        135deg,
        rgba(30, 41, 59, 0.95),
        rgba(15, 23, 42, 0.95)
    );
}

.tutorial-track-badge {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.15);
    color: #bfdbfe;
    font-weight: 800;
}

.tutorial-track-header p {
    margin: 8px 0 0;
    color: #94a3b8;
}

.tutorial-lesson-count {
    white-space: nowrap;
    color: #93c5fd;
    font-weight: 800;
}

.tutorial-lesson {
    background: #111827;
    border: 1px solid #273449;
    border-radius: 18px;
    padding: clamp(20px, 4vw, 38px);
    box-shadow: 0 16px 45px rgba(0, 0, 0, 0.22);
}

.tutorial-lesson-kicker {
    color: #60a5fa;
    font-size: 0.82rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.tutorial-lesson h1 {
    margin: 7px 0 28px;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
    line-height: 1.15;
}

.tutorial-section {
    margin: 22px 0;
}

.tutorial-section h2,
.tutorial-practice h2 {
    margin: 0 0 10px;
    font-size: 1.12rem;
}

.tutorial-section p,
.tutorial-practice p {
    color: #cbd5e1;
    line-height: 1.75;
    margin: 0;
}

.tutorial-lesson pre {
    margin: 12px 0 0;
    padding: 17px;
    background: #07101d;
    border: 1px solid #26354b;
    border-radius: 12px;
    overflow-x: auto;
    white-space: pre;
}

.tutorial-lesson code {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    color: #dbeafe;
    font-size: 0.92rem;
}

/* ============================================================
 * FLOW VISUALS
 * ============================================================ */

.tutorial-flow {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 7px;
    padding: 16px;
    border: 1px solid #2b3a50;
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.75);
}

.tutorial-flow-step {
    padding: 12px 14px;
    border-radius: 10px;
    background: linear-gradient(
        135deg,
        rgba(30, 64, 175, 0.35),
        rgba(30, 41, 59, 0.8)
    );
    border: 1px solid rgba(96, 165, 250, 0.25);
    color: #e0f2fe;
    font-weight: 700;
    text-align: center;
}

.tutorial-flow-arrow {
    text-align: center;
    color: #60a5fa;
    font-weight: 900;
    animation: tutorial-flow-pulse 1.8s ease-in-out infinite;
}

@keyframes tutorial-flow-pulse {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.65;
    }
    50% {
        transform: translateY(3px);
        opacity: 1;
    }
}

/* ============================================================
 * VISUAL TABLES
 * ============================================================ */

.tutorial-visual-table-wrapper {
    overflow-x: auto;
    border: 1px solid #2b3a50;
    border-radius: 12px;
}

.tutorial-visual-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.tutorial-visual-table th,
.tutorial-visual-table td {
    padding: 10px 12px;
    border-bottom: 1px solid #26354b;
    text-align: left;
}

.tutorial-visual-table th {
    background: #172235;
    color: #bfdbfe;
}

.tutorial-visual-table td {
    color: #cbd5e1;
}

/* ============================================================
 * PRACTICE / QUERY EDITOR
 * ============================================================ */

.tutorial-practice {
    margin-top: 30px;
    padding: 20px;
    border: 1px solid #36506f;
    border-radius: 16px;
    background: linear-gradient(
        135deg,
        rgba(15, 118, 110, 0.10),
        rgba(30, 41, 59, 0.55)
    );
}

.tutorial-practice-badge {
    display: inline-flex;
    margin-bottom: 7px;
    padding: 5px 9px;
    border-radius: 999px;
    background: rgba(45, 212, 191, 0.12);
    color: #99f6e4;
    font-size: 0.78rem;
    font-weight: 800;
}

.tutorial-practice-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.tutorial-db-select {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #94a3b8;
    font-size: 0.82rem;
    font-weight: 700;
}

.tutorial-db-select select {
    border: 1px solid #334155;
    border-radius: 8px;
    padding: 8px 10px;
    background: #0b1220;
    color: #e5e7eb;
}

.tutorial-sql-editor {
    width: 100%;
    min-height: 170px;
    margin-top: 16px;
    resize: vertical;
    box-sizing: border-box;
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 15px;
    background: #050b14;
    color: #e2e8f0;
    font: 0.9rem/1.55 "SFMono-Regular", Consolas, monospace;
    outline: none;
}

.tutorial-sql-editor:focus {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.12);
}

.tutorial-editor-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 12px;
}

.tutorial-run-button,
.tutorial-reset-button,
.tutorial-nav-button {
    border: 0;
    border-radius: 9px;
    padding: 10px 14px;
    cursor: pointer;
    font-weight: 800;
}

.tutorial-run-button {
    background: #2563eb;
    color: #ffffff;
}

.tutorial-run-button:hover {
    background: #1d4ed8;
}

.tutorial-run-button:disabled {
    opacity: 0.6;
    cursor: wait;
}

.tutorial-reset-button {
    background: #334155;
    color: #e2e8f0;
}

.tutorial-editor-hint {
    color: #94a3b8;
    font-size: 0.78rem;
}

.tutorial-query-status {
    min-height: 22px;
    margin-top: 10px;
    font-size: 0.86rem;
    font-weight: 700;
}

.tutorial-query-status.loading {
    color: #facc15;
}

.tutorial-query-status.success {
    color: #4ade80;
}

.tutorial-query-status.error {
    color: #f87171;
}

/* ============================================================
 * COMPACT SCROLLABLE RESULTS
 * ============================================================ */

.tutorial-query-results {
    margin-top: 16px;
    border: 1px solid #36506f;
    border-radius: 13px;
    background: #0b1220;
    overflow: hidden;
}

.tutorial-results-header {
    padding: 12px 14px;
    border-bottom: 1px solid #26354b;
    background: #111c2d;
}

.tutorial-results-header h3 {
    margin: 0;
    font-size: 1rem;
}

.tutorial-results-header span {
    color: #94a3b8;
    font-size: 0.78rem;
}

.tutorial-results-scroll {
    max-height: 190px;
    overflow: auto;
}

.tutorial-results-scroll table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.tutorial-results-scroll th,
.tutorial-results-scroll td {
    padding: 9px 11px;
    border-bottom: 1px solid #26354b;
    border-right: 1px solid #26354b;
    white-space: nowrap;
    text-align: left;
}

.tutorial-results-scroll th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: #172235;
    color: #bfdbfe;
}

.tutorial-results-scroll td {
    color: #cbd5e1;
}

.tutorial-results-scroll::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.tutorial-results-scroll::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: 999px;
}

/* ============================================================
 * LESSON NAVIGATION
 * ============================================================ */

.tutorial-lesson-navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 18px;
    padding: 13px 0;
    color: #94a3b8;
}

.tutorial-nav-button {
    background: #1e293b;
    color: #e2e8f0;
}

.tutorial-nav-button:hover:not(:disabled) {
    background: #334155;
}

.tutorial-nav-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

/* ============================================================
 * RESPONSIVE
 * ============================================================ */

@media (max-width: 900px) {
    .tutorial-container {
        flex-direction: column;
    }

    .tutorial-sidebar {
        width: auto;
        flex-basis: auto;
        position: relative;
        top: auto;
        height: auto;
        max-height: 46vh;
    }

    .tutorial-content {
        padding: 22px 14px 50px;
    }
}

@media (max-width: 600px) {
    .tutorial-track-header,
    .tutorial-practice-heading {
        flex-direction: column;
        align-items: stretch;
    }

    .tutorial-lesson {
        padding: 18px 14px;
    }

    .tutorial-practice {
        padding: 15px;
    }

    .tutorial-lesson-navigation {
        flex-wrap: wrap;
        justify-content: center;
    }

    .tutorial-editor-actions {
        align-items: stretch;
    }

    .tutorial-run-button,
    .tutorial-reset-button {
        flex: 1;
    }
}


/* ============================================================
 * MOBILE NAVIGATION FIX — TUTORIAL ONLY
 * ------------------------------------------------------------
 * Desktop: hamburger is hidden and the existing inline navigation
 * remains unchanged.
 * Mobile: the full navigation is hidden until the hamburger is
 * clicked. The hamburger sits below the platform logo, matching the
 * working Playground mobile header pattern.
 * ============================================================ */

.tutorial-mobile-menu-button {
    display: none;
}

@media (max-width: 800px) {
    .tutorial-site-header {
        min-height: 0;
        padding: 12px 14px;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 10px;
    }

    .tutorial-brand {
        align-self: flex-start;
    }

    .tutorial-mobile-menu-button {
        display: grid;
        align-self: center;
        place-items: center;
        width: 42px;
        height: 42px;
        padding: 0;
        margin: 0;
        border: 1px solid rgba(148, 163, 184, 0.20);
        border-radius: 10px;
        background: rgba(14, 28, 48, 0.86);
        color: #ffffff;
        font-size: 24px;
        line-height: 1;
        cursor: pointer;
        z-index: 1002;
        -webkit-tap-highlight-color: transparent;
    }

    .tutorial-mobile-menu-button:focus-visible {
        outline: 2px solid #60a5fa;
        outline-offset: 3px;
    }

    .tutorial-main-navigation {
        display: none;
        width: 100%;
        box-sizing: border-box;
        margin: 0;
        padding: 12px;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        border: 1px solid rgba(120, 170, 230, 0.18);
        border-radius: 14px;
        background: #0b1829;
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    }

    .tutorial-main-navigation.open {
        display: grid;
    }

    .tutorial-main-navigation a {
        display: block;
        padding: 10px 8px;
        border-radius: 8px;
        text-align: center;
        font-size: 14px;
    }
}

/* ============================================================
 * TRY IT YOURSELF / PRACTICE CARD FIX
 * ------------------------------------------------------------
 * tutorial.js renders this component with .practice-card and
 * .practice-* classes. These styles restore the intended card
 * presentation without changing the editor or execution logic.
 * ============================================================ */

.practice-card {
    border: 1px solid rgba(148, 163, 184, 0.20);
    border-radius: 15px;
    padding: 20px;
    background:
        linear-gradient(145deg, rgba(56, 189, 248, 0.07), transparent),
        rgba(15, 27, 45, 0.94);
    box-sizing: border-box;
}

.practice-card h3 {
    margin: 0 0 8px;
    color: #e5edf8;
    font-size: clamp(1.5rem, 3vw, 2rem);
}

.practice-label {
    margin-bottom: 7px;
    color: #7dd3fc;
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.practice-question {
    margin: 8px 0 16px;
    color: #d5dfeb;
    font-size: 1rem;
    line-height: 1.75;
}

.practice-editor {
    width: 100%;
    min-height: 145px;
    resize: vertical;
    box-sizing: border-box;
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 11px;
    background: #050c16;
    color: #e2e8f0;
    padding: 14px;
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.88rem;
    line-height: 1.55;
    outline: none;
}

.practice-editor:focus {
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.10);
}

.practice-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 10px;
}

.practice-toolbar button {
    border: 0;
    border-radius: 9px;
    padding: 9px 14px;
    cursor: pointer;
    font-weight: 700;
    color: #ffffff;
    background: #0284c7;
}

.practice-toolbar button:hover {
    filter: brightness(1.08);
}

.practice-toolbar button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.practice-database {
    margin-left: auto;
    color: #9fb0c5;
    font-size: 0.8rem;
}

.practice-status {
    min-height: 22px;
    margin-top: 10px;
    color: #9fb0c5;
    line-height: 1.4;
}

.practice-status.success {
    color: #34d399;
}

.practice-status.error {
    color: #fb7185;
}

.practice-results {
    display: none;
    margin-top: 14px;
    border: 1px solid rgba(56, 189, 248, 0.24);
    border-radius: 12px;
    overflow: hidden;
    background: #07111f;
}

.practice-results.visible {
    display: block;
    animation: resultReveal 0.25s ease both;
}

.practice-results-header {
    padding: 10px 13px;
    display: flex;
    justify-content: space-between;
    gap: 10px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.20);
    background: rgba(30, 41, 59, 0.72);
}

.practice-results-header strong {
    font-size: 0.9rem;
}

.practice-results-header span {
    color: #9fb0c5;
    font-size: 0.76rem;
}

.practice-results-scroll {
    max-height: 178px;
    overflow: auto;
}

.practice-results table {
    width: 100%;
    border-collapse: collapse;
    min-width: max-content;
}

.practice-results th,
.practice-results td {
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    border-right: 1px solid rgba(148, 163, 184, 0.08);
    padding: 9px 11px;
    text-align: left;
    white-space: nowrap;
    font-size: 0.8rem;
}

.practice-results th {
    position: sticky;
    top: 0;
    z-index: 2;
    background: #132238;
    color: #bae6fd;
}

.practice-results td {
    color: #dbe5f1;
}

@media (max-width: 600px) {
    .practice-card {
        padding: 15px;
    }

    .practice-database {
        width: 100%;
        margin-left: 0;
    }
}


/* ============================================================
 * FINAL PLAYGROUND-STYLE MOBILE HEADER + FOOTER FIX
 * ------------------------------------------------------------
 * ONLY the Tutorial header/footer are affected here.
 *
 * Desktop:
 *   - Existing Tutorial layout remains unchanged.
 *   - Header keeps the same platform branding.
 *
 * Mobile:
 *   - Hamburger is LEFT of the SQL logo, never centered.
 *   - Full Tutorial navigation is hidden until hamburger is tapped.
 *   - The six requested links are available in that menu:
 *       Home, Tutorials, Challenges, Sandbox, FAQ, Feedback.
 *
 * Footer:
 *   - Uses the locked Playground/Challenges branding and spacing.
 * ============================================================ */

/* ---------- Platform-style Tutorial header ---------- */
.tutorial-site-header {
    width: 100%;
    min-height: 72px;
    padding: 0 5vw;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    position: sticky;
    top: 0;
    z-index: 2000;
    background: rgba(7, 17, 31, 0.94);
    border-bottom: 1px solid rgba(120, 170, 230, 0.18);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.tutorial-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    min-width: 0;
    color: #edf5ff;
    text-decoration: none;
    border-radius: 14px;
}

.tutorial-brand-mark,
.tutorial-brand .tutorial-brand-mark {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #35a7ff, #7773ff);
    color: #04101e;
    font-size: 13px;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 8px 22px rgba(53, 167, 255, 0.18);
}

.tutorial-brand-text {
    display: block;
    min-width: 0;
    line-height: 1.1;
}

.tutorial-brand-text strong {
    display: block;
    color: #edf5ff;
    font-size: 16px;
    font-weight: 800;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.tutorial-brand-text small {
    display: block;
    margin-top: 4px;
    color: #9eb1c8;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.tutorial-main-navigation {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 20px;
}

.tutorial-main-navigation a {
    color: #9eb1c8;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.2;
    transition: color 0.2s ease, transform 0.2s ease;
}

.tutorial-main-navigation a:hover,
.tutorial-main-navigation a[aria-current="page"] {
    color: #ffffff;
}

/* ---------- Mobile hamburger: exact left-of-logo pattern ---------- */
.tutorial-mobile-menu-button {
    display: none;
}

@media (max-width: 760px) {
    .tutorial-site-header {
        min-height: 64px;
        height: auto;
        padding: 10px 12px;
        display: grid;
        grid-template-columns: 44px minmax(0, max-content) 1fr;
        grid-template-rows: 44px;
        align-items: center;
        justify-content: start;
        gap: 10px;
        flex-wrap: nowrap;
        box-sizing: border-box;
    }

    .tutorial-mobile-menu-button {
        grid-column: 1;
        grid-row: 1;
        width: 44px;
        height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0;
        margin: 0;
        border: 1px solid #334155;
        border-radius: 12px;
        background: #0f1b2e;
        color: #e2e8f0;
        font-size: 24px;
        line-height: 1;
        cursor: pointer;
        z-index: 2003;
        -webkit-tap-highlight-color: transparent;
    }

    .tutorial-mobile-menu-button:hover {
        background: #172033;
        border-color: #475569;
    }

    .tutorial-mobile-menu-button:focus-visible {
        outline: 2px solid #55c2ff;
        outline-offset: 3px;
    }

    .tutorial-brand {
        grid-column: 2 / 4;
        grid-row: 1;
        width: max-content;
        max-width: 100%;
        margin: 0;
        justify-self: start;
        align-self: center;
    }

    .tutorial-brand-mark,
    .tutorial-brand .tutorial-brand-mark {
        width: 48px;
        height: 48px;
        flex-basis: 48px;
    }

    .tutorial-brand-text strong {
        font-size: 16px;
    }

    .tutorial-main-navigation {
        display: none !important;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        box-sizing: border-box;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        padding: 10px 14px 14px;
        background: rgba(7, 17, 31, 0.98);
        border-top: 1px solid rgba(120, 170, 230, 0.12);
        border-bottom: 1px solid rgba(120, 170, 230, 0.18);
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
        z-index: 2002;
    }

    .tutorial-main-navigation.open {
        display: flex !important;
    }

    .tutorial-main-navigation a {
        width: 100%;
        min-height: 44px;
        box-sizing: border-box;
        display: flex;
        align-items: center;
        padding: 8px 10px;
        border-radius: 8px;
        color: #cbd5e1;
        font-size: 14px;
        white-space: nowrap;
    }

    .tutorial-main-navigation a:hover,
    .tutorial-main-navigation a[aria-current="page"] {
        background: rgba(53, 167, 255, 0.10);
        color: #ffffff;
    }
}

@media (max-width: 420px) {
    .tutorial-site-header {
        grid-template-columns: 40px minmax(0, max-content) 1fr;
        gap: 10px;
        padding-left: 10px;
        padding-right: 10px;
    }

    .tutorial-mobile-menu-button {
        width: 40px;
        height: 40px;
    }

    .tutorial-brand {
        max-width: calc(100vw - 70px);
    }

    .tutorial-brand-mark,
    .tutorial-brand .tutorial-brand-mark {
        width: 40px;
        height: 40px;
        flex-basis: 40px;
    }

    .tutorial-brand-text strong {
        font-size: 15px;
    }

    .tutorial-brand-text small {
        font-size: 10px;
    }
}

/* ---------- Locked Playground/Challenges-style footer ---------- */
.tutorial-site-footer {
    width: 100%;
    box-sizing: border-box;
    margin-top: 32px;
    padding: 28px 5vw 24px;
    background: #07111f;
    border-top: 1px solid rgba(120, 170, 230, 0.18);
}

.tutorial-site-footer .challenge-footer-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    align-items: start;
    gap: 36px;
}

.tutorial-site-footer .challenge-footer-brand a {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: #edf5ff;
    text-decoration: none;
}

.tutorial-site-footer .challenge-footer-brand-mark {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #35a7ff, #7773ff);
    color: #04101e;
    font-size: 13px;
    font-weight: 900;
    line-height: 1;
    box-shadow: 0 8px 22px rgba(53, 167, 255, 0.18);
}

.tutorial-site-footer .challenge-footer-brand strong {
    display: block;
    color: #edf5ff;
    font-size: 16px;
    line-height: 1.2;
}

.tutorial-site-footer .challenge-footer-brand small {
    display: block;
    margin-top: 5px;
    color: #9eb1c8;
    font-size: 12px;
    line-height: 1.45;
}

.tutorial-site-footer .challenge-footer-links {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    gap: 10px 22px;
    text-align: center;
}

.tutorial-site-footer .challenge-footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 14px;
    white-space: nowrap;
    transition: color 0.2s ease, transform 0.2s ease;
}

.tutorial-site-footer .challenge-footer-links a:hover,
.tutorial-site-footer .challenge-footer-links a[aria-current="page"] {
    color: #ffffff;
    transform: translateX(2px);
}

.tutorial-site-footer .challenge-footer-copy {
    color: #9eb1c8;
    font-size: 13px;
    line-height: 1.6;
    text-align: right;
}

.tutorial-site-footer .challenge-footer-copy p {
    margin: 0 0 8px;
}

@media (max-width: 760px) {
    .tutorial-site-footer {
        margin-top: 32px;
        padding: 28px 18px 24px;
    }

    .tutorial-site-footer .challenge-footer-inner {
        grid-template-columns: 1fr;
        gap: 22px;
        text-align: center;
    }

    .tutorial-site-footer .challenge-footer-brand {
        display: flex;
        justify-content: center;
    }

    .tutorial-site-footer .challenge-footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 9px 16px;
        text-align: center;
    }

    .tutorial-site-footer .challenge-footer-copy {
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tutorial-mobile-menu-button,
    .tutorial-brand,
    .tutorial-main-navigation,
    .tutorial-main-navigation a,
    .tutorial-site-footer a {
        transition: none !important;
    }
}


/* ============================================================
 * FINAL MOBILE VIEWPORT WIDTH FIX — TUTORIAL ONLY
 * ------------------------------------------------------------
 * PURPOSE:
 *   Fixes the normal phone/mobile-mode issue where the Tutorial
 *   page can render at only about half of the available viewport.
 *
 * IMPORTANT:
 *   - Applies ONLY to normal mobile CSS viewports (<= 800px).
 *   - Laptop/desktop layout is untouched.
 *   - Phone "Desktop site" mode is untouched because its CSS
 *     viewport is handled by the existing desktop/touch rules.
 *   - Existing hamburger, logo, navigation, roadmap, lesson
 *     content and footer styling are not changed.
 * ============================================================ */

@media (max-width: 800px) {

    html,
    body {
        width: 100vw !important;
        max-width: 100vw !important;
        min-width: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }

    .tutorial-site-header,
    .tutorial-container,
    .tutorial-site-footer {
        width: 100vw !important;
        max-width: 100vw !important;
        min-width: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
    }

    .tutorial-container {
        display: flex !important;
        flex-direction: column !important;
        min-width: 0 !important;
    }

    .tutorial-sidebar,
    .tutorial-content {
        width: 100% !important;
        max-width: 100% !important;
        min-width: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
    }

    .tutorial-sidebar {
        flex: 0 0 auto !important;
    }

    .tutorial-content {
        flex: 0 0 auto !important;
        overflow-x: hidden !important;
    }
}

/* ============================================================
   TUTORIAL FOOTER — MATCH PLAYGROUND EXACTLY ON LAPTOP/DESKTOP
   ------------------------------------------------------------
   This override is intentionally limited to the footer and only
   applies above the mobile breakpoint.

   The Playground footer is the reference baseline:
   - same footer height/spacing
   - same 3-column proportions
   - same brand typography
   - same navigation wrapping
   - same copyright alignment

   Mobile Tutorial footer rules below remain unchanged.
   No tutorial content, roadmap, sidebar, header, or JS is changed.
   ============================================================ */

@media (min-width: 761px) {

    .tutorial-site-footer {
        width: 100%;
        box-sizing: border-box;
        margin-top: 40px;
        padding: 32px 5vw 28px;
        background: #07111f;
        border-top: 1px solid rgba(120, 170, 230, 0.18);
    }

    .tutorial-site-footer .challenge-footer-inner {
        width: 100%;
        max-width: 1400px;
        margin: 0 auto;
        display: grid;
        grid-template-columns:
            minmax(220px, 1.15fr)
            minmax(320px, 1.7fr)
            minmax(220px, 0.95fr);
        align-items: start;
        gap: 28px;
    }

    .tutorial-site-footer .challenge-footer-brand a {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        color: #edf5ff;
        text-decoration: none;
    }

    .tutorial-site-footer .challenge-footer-brand-mark {
        width: 42px;
        height: 42px;
        flex: 0 0 42px;
        display: grid;
        place-items: center;
        border-radius: 12px;
        background: linear-gradient(135deg, #35a7ff, #7773ff);
        color: #04101e;
        font-size: 13px;
        font-weight: 900;
        line-height: 1;
        box-shadow: 0 8px 22px rgba(53, 167, 255, 0.18);
    }

    .tutorial-site-footer .challenge-footer-brand strong {
        display: block;
        color: #ffffff;
        font-size: 16px;
        line-height: 1.2;
    }

    .tutorial-site-footer .challenge-footer-brand small {
        display: block;
        margin: 6px 0;
        color: #9eb1c8;
        font-family:
            Inter,
            -apple-system,
            BlinkMacSystemFont,
            "Segoe UI",
            sans-serif;
        font-size: 14px;
        line-height: 1.4;
    }

    .tutorial-site-footer .challenge-footer-links {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        align-content: flex-start;
        row-gap: 10px;
        column-gap: 20px;
        min-width: 0;
        line-height: 1.4;
        white-space: normal;
        text-align: center;
    }

    .tutorial-site-footer .challenge-footer-links a {
        flex: 0 0 auto;
        color: #cbd5e1;
        text-decoration: none;
        font-size: 14px;
        white-space: nowrap;
        transition: color .2s ease, transform .2s ease;
    }

    .tutorial-site-footer .challenge-footer-links a:hover,
    .tutorial-site-footer .challenge-footer-links a[aria-current="page"] {
        color: #ffffff;
        transform: translateX(2px);
    }

    .tutorial-site-footer .challenge-footer-copy {
        min-width: 0;
        color: #9eb1c8;
        font-size: 13px;
        line-height: 1.6;
        text-align: right;
    }

    .tutorial-site-footer .challenge-footer-copy p {
        margin: 0 0 8px;
    }
}

/* Playground uses a tighter desktop layout for widths from 761px
   through 900px. Keep the same breakpoint behavior here. */
@media (max-width: 900px) and (min-width: 761px) {

    .tutorial-site-footer .challenge-footer-inner {
        grid-template-columns:
            minmax(190px, 1fr)
            minmax(280px, 1.4fr)
            minmax(190px, 0.9fr);
        gap: 22px;
    }

    .tutorial-site-footer .challenge-footer-links {
        column-gap: 16px;
    }
}
/* =========================================================
   TUTORIAL SIDEBAR — DESKTOP BOTTOM GAP
   Keep the sidebar scrollable while leaving the same
   visual gap above the footer as the main content section.
   Mobile is intentionally untouched.
   ========================================================= */
@media (min-width: 901px) {
    .tutorial-sidebar {
        margin-bottom: 100px !important;
        overflow-y: auto !important;
        overflow-x: hidden !important;
    }
}
/* =========================================================
   TUTORIAL MOBILE FOOTER — MATCH PLAYGROUND BRANDING
   Branding stays LEFT. Nothing else is changed.
   ========================================================= */
@media (max-width: 760px) {
    .tutorial-site-footer .challenge-footer-brand {
        display: flex !important;
        justify-content: flex-start !important;
        justify-self: start !important;
        width: 100% !important;
        text-align: left !important;
    }

    .tutorial-site-footer .challenge-footer-brand a {
        justify-content: flex-start !important;
        text-align: left !important;
    }
}