/* ============================================================================
   LEARN PAGE STYLES
   Extends company.css sidebar + layout — content-focused reading experience
   ============================================================================ */

/* ============================================================================
   0. PUBLIC (UNAUTHENTICATED) NAV LINKS
   Reuses layout.css .navbar/.nav-brand for structure; only the inner links
   need styling to match the landing page aesthetic.
   ============================================================================ */

.learn-public-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.learn-public-link {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: rgba(229, 226, 225, 0.6);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.15s ease;
}

.learn-public-link:hover,
.learn-public-link--active {
    color: var(--accent-color);
}

.learn-public-link-icon {
    font-size: 1rem;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 20;
}

.learn-public-login-btn {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 0.8rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #050505;
    background: var(--accent-color);
    padding: 0.5rem 2rem;
    text-decoration: none;
    flex-shrink: 0;
    transition: opacity 0.15s ease;
}

.learn-public-login-btn:hover {
    opacity: 0.85;
}

/* ============================================================================
   1. LAYOUT OVERRIDES
   ============================================================================ */

/* Widen sidebar for the learn page */
.learn-wrapper {
    --sidebar-width: 420px;
}

/* Allow the learn content area to scroll freely and fill remaining width */
.learn-page {
    overflow-y: auto;
    overflow-x: hidden;
    min-height: calc(100vh - var(--navbar-height, 80px));
    width: 100%;
}

/* Page + overflow scrollbars — 4px to match landing/base pages.
   Same selector specificity (0,1,1) as company.css; learn.css loads after → wins.
   scrollbar-color for Firefox; ::-webkit-scrollbar-* for Chrome. */
body:has(.learn-wrapper) {
    scrollbar-width: thin;
    scrollbar-color: var(--accent-color) #0a0a0a;
}
body:has(.learn-wrapper) ::-webkit-scrollbar { width: 8px; height: 8px; }
body:has(.learn-wrapper) ::-webkit-scrollbar-track { background: #0a0a0a; }
body:has(.learn-wrapper) ::-webkit-scrollbar-thumb { background: var(--accent-color); }
body:has(.learn-wrapper) ::-webkit-scrollbar-thumb:hover { background: rgba(0, 255, 65, 0.6); }

/* Sidebar nav-tabs scrollbar — 8px slim green */
.learn-wrapper .sidebar .nav-tabs {
    scrollbar-width: thin;
    scrollbar-color: var(--accent-color-30) var(--surface-lowest);
}
.learn-wrapper .sidebar .nav-tabs::-webkit-scrollbar              { width: 8px; }
.learn-wrapper .sidebar .nav-tabs::-webkit-scrollbar-track        { background: var(--surface-lowest); border-radius: 0; }
.learn-wrapper .sidebar .nav-tabs::-webkit-scrollbar-thumb        { background: var(--accent-color-30); border-radius: 0; }
.learn-wrapper .sidebar .nav-tabs::-webkit-scrollbar-thumb:hover  { background: var(--accent-color-50); border-radius: 0; }

/* Wider sidebar: bump shared typography */
.learn-wrapper .sidebar-terminal-title { font-size: 1.8rem; }
.learn-wrapper .sidebar-terminal-meta { font-size: 0.7rem; }

.learn-wrapper .nav-group-header span {
    font-size: 0.9rem;
}

.learn-wrapper .tab-link--dashboard {
    font-size: 0.8rem;
}

.learn-wrapper .nav-code {
    font-size: 0.625rem;
}

/* ============================================================================
   2. SIDEBAR LESSON LINKS
   Styled to match .tab-link from company.css exactly
   ============================================================================ */

.learn-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 1.25rem 0.55rem 1.5rem;
    color: #b9ccb2;
    text-decoration: none;
    font-size: 0.775rem;
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: background 0.12s ease, color 0.12s ease;
    white-space: nowrap;
}

.learn-nav-link:hover {
    background: #1C1B1B;
    color: var(--accent-color);
}

.learn-nav-link:hover .nav-code {
    color: var(--accent-color);
}

.learn-nav-link.active {
    color: var(--accent-color);
    background: rgba(0, 255, 65, 0.08);
}

.learn-nav-link.active .nav-code {
    color: var(--accent-color);
}

.learn-nav-inner {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================================================
   3. LESSON CONTAINER
   ============================================================================ */

.learn-lesson-container {
    width: 100%;
    padding: 2.5rem 2.5rem 4rem;
    box-sizing: border-box;
}

/* ============================================================================
   4. BREADCRUMB
   ============================================================================ */

.learn-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.575rem;
    color: #353534;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.learn-breadcrumb-link {
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity 0.12s ease;
}

.learn-breadcrumb-link:hover {
    opacity: 0.75;
}

.learn-breadcrumb-sep {
    color: #2a2a2a;
}

.learn-breadcrumb-module {
    color: #555;
}

.learn-breadcrumb-current {
    color: #b9ccb2;
}

/* ============================================================================
   5. LESSON HEADER
   ============================================================================ */

.learn-lesson-header {
    margin-bottom: 2.5rem;
}

.learn-lesson-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.learn-module-tag {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #050505;
    background: var(--accent-color);
    padding: 0.2rem 0.45rem;
    line-height: 1;
}

.learn-meta-dot {
    color: #2a2a2a;
    font-size: 0.75rem;
}

.learn-lesson-count,
.learn-reading-time {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.575rem;
    color: #555;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.learn-clock-icon {
    font-size: 0.85rem;
    color: #555;
    vertical-align: middle;
    font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 20;
}

.learn-title {
    font-family: var(--font-headline, 'Orbitron', sans-serif);
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    font-weight: 700;
    color: #e5e2e1;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
}

.learn-summary {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 1rem;
    font-weight: 600;
    color: #686766;
    line-height: 1.6;
    margin: 0;
    max-width: 640px;
}

.learn-header-rule {
    margin-top: 2rem;
    border: none;
    border-top: 1px solid #1C1B1B;
}

/* ============================================================================
   6. LESSON BODY TYPOGRAPHY
   ============================================================================ */

.learn-body {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 1rem;
    font-weight: 500;
    color: #b9ccb2;
    line-height: 1.8;
}

.learn-body h2 {
    font-family: var(--font-headline, 'Orbitron', sans-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.05em;
    margin: 2.5rem 0 0.9rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid #1C1B1B;
}

.learn-body h3 {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 0.9rem;
    font-weight: 900;
    color: #e5e2e1;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin: 2rem 0 0.6rem;
}

.learn-body p {
    margin: 0 0 1.25rem;
    color: #b9ccb2;
}

.learn-body ul,
.learn-body ol {
    padding-left: 1.5rem;
    margin: 0 0 1.25rem;
}

.learn-body li {
    margin-bottom: 0.5rem;
    color: #b9ccb2;
}

.learn-body strong {
    color: #e5e2e1;
    font-weight: 700;
}

.learn-body em {
    color: var(--accent-color);
    font-style: normal;
    font-weight: 700;
}

/* Pull quote / callout block */
.learn-body blockquote {
    margin: 1.75rem 0;
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--accent-color);
    background: rgba(0, 255, 65, 0.04);
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: #e5e2e1;
    font-style: italic;
}

.learn-body blockquote p {
    margin: 0;
    color: #e5e2e1;
}

/* Inline code / formulas */
.learn-body code {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.85em;
    color: var(--accent-color);
    background: rgba(0, 255, 65, 0.08);
    padding: 0.1em 0.35em;
}

/* Block formula / equation box */
.learn-body pre {
    background: #0a0a0a;
    border: 1px solid #1C1B1B;
    border-left: 3px solid var(--accent-color);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    overflow-x: auto;
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.825rem;
    color: var(--accent-color);
    line-height: 1.6;
}

/* Key term callout */
.learn-key-term {
    display: inline-block;
    background: rgba(0, 255, 65, 0.08);
    border: 1px solid rgba(0, 255, 65, 0.2);
    color: var(--accent-color);
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.5rem;
    margin-right: 0.5rem;
}

/* Info / warning boxes */
.learn-callout {
    margin: 1.75rem 0;
    padding: 1rem 1.25rem;
    border: 1px solid #1C1B1B;
    border-left: 4px solid;
}

.learn-callout.info { border-left-color: var(--accent-color); background: rgba(0,255,65,0.03); }
.learn-callout.warning { border-left-color: #f0a500; background: rgba(240,165,0,0.04); }
.learn-callout.danger { border-left-color: #ff4444; background: rgba(255,68,68,0.04); }

.learn-callout-title {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.5rem;
}

.learn-callout.info .learn-callout-title { color: var(--accent-color); }
.learn-callout.warning .learn-callout-title { color: #f0a500; }
.learn-callout.danger .learn-callout-title { color: #ff4444; }

/* ============================================================================
   7. COMING SOON PLACEHOLDER
   ============================================================================ */

.learn-coming-soon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    gap: 1rem;
}

.learn-coming-soon-icon {
    font-size: 2.5rem;
    color: #2a2a2a;
    font-variation-settings: 'FILL' 0, 'wght' 200, 'GRAD' 0, 'opsz' 48;
}

.learn-coming-soon-title {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 0.85rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: #555;
    margin: 0;
}

.learn-coming-soon-desc {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.65rem;
    color: #353534;
    line-height: 1.7;
    margin: 0;
}

.learn-coming-soon-cta {
    margin-top: 0.5rem;
    display: inline-block;
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid rgba(0, 255, 65, 0.3);
    transition: background 0.15s, border-color 0.15s;
}

.learn-coming-soon-cta:hover {
    background: rgba(0, 255, 65, 0.08);
    border-color: var(--accent-color);
}

/* ============================================================================
   8. PREV / NEXT LESSON NAVIGATION
   ============================================================================ */

.learn-lesson-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #1C1B1B;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.learn-nav-prev-slot {
    justify-self: start;
}

.learn-nav-next-slot {
    justify-self: end;
    text-align: right;
}

.learn-nav-btn {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.9rem 1.1rem;
    background: #0E0E0E;
    border: 1px solid #1C1B1B;
    text-decoration: none;
    transition: background 0.12s ease, border-color 0.12s ease;
    max-width: 280px;
}

.learn-nav-btn:hover {
    background: #131313;
    border-color: var(--accent-color);
}

.learn-nav-btn-next {
    align-items: flex-end;
}

.learn-nav-direction {
    font-family: var(--font-mono, 'IBM Plex Mono', monospace);
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-color);
}

.learn-nav-lesson-title {
    font-family: var(--font-body, 'Rajdhani', sans-serif);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #b9ccb2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 240px;
    display: block;
}

/* Mobile-only elements — hidden on desktop */
.learn-mobile-overlay { display: none; }
.learn-mobile-nav-btn { display: none; }

/* ============================================================================
   9. RESPONSIVE
   ============================================================================ */

@media (max-width: 768px) {
    /* Reset sidebar-width token so company-page gets margin-left: 0 */
    .learn-wrapper {
        --sidebar-width: 0px;
        flex-direction: column;
    }

    /* ── SIDEBAR DRAWER ──────────────────────────────────────────────── */
    /* Override company.css @768 which sets sidebar to position:static width:100% */
    .learn-wrapper .sidebar {
        position: fixed !important;
        top: var(--navbar-height-mobile, 64px);
        left: 0;
        width: min(85vw, 340px);
        height: calc(100vh - var(--navbar-height-mobile, 64px));
        border-right: 1px solid #1C1B1B;
        border-bottom: none;
        overflow-y: auto;
        overflow-x: hidden;
        transform: translateX(-100%);
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1100;
        box-shadow: none;
    }

    .learn-wrapper .sidebar.is-open {
        transform: translateX(0);
        box-shadow: 8px 0 32px rgba(0, 0, 0, 0.8);
    }

    /* Restore vertical nav-tabs layout (company.css turns it horizontal at 768px) */
    .learn-wrapper .sidebar .sidebar-terminal-header { display: flex; }
    .learn-wrapper .sidebar .nav-group-header { display: block; }
    .learn-wrapper .sidebar .nav-dashboard-wrapper { padding: 0 0.75rem; margin-bottom: 1rem; }
    .learn-wrapper .sidebar .nav-tabs {
        display: block;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 0;
    }
    .learn-wrapper .sidebar .nav-tabs li { flex-shrink: 1; white-space: normal; }

    /* ── OVERLAY BACKDROP ────────────────────────────────────────────── */
    /* top: navbar-height-mobile keeps the top nav visible and unblurred */
    .learn-mobile-overlay.is-open {
        display: block;
        position: fixed;
        top: var(--navbar-height-mobile, 64px);
        right: 0;
        bottom: 0;
        left: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 1099;
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
    }

    /* ── CONTENT AREA ────────────────────────────────────────────────── */
    .learn-wrapper .company-page { margin-left: 0; width: 100%; }

    /* ── LESSONS TOGGLE BUTTON ───────────────────────────────────────── */
    .learn-mobile-nav-btn {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.45rem 0.85rem;
        margin-bottom: 1.5rem;
        background: transparent;
        border: 1px solid rgba(0, 255, 65, 0.2);
        color: rgba(0, 255, 65, 0.7);
        font-family: var(--font-mono, 'IBM Plex Mono', monospace);
        font-size: 0.6rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.12em;
        cursor: pointer;
        transition: border-color 0.15s, color 0.15s;
    }
    .learn-mobile-nav-btn:hover {
        border-color: var(--accent-color);
        color: var(--accent-color);
    }
    .learn-mobile-nav-btn .material-symbols-outlined {
        font-size: 0.85rem;
        line-height: 1;
    }

    /* ── LESSON CONTAINER ────────────────────────────────────────────── */
    .learn-lesson-container {
        padding: 1.5rem 1.25rem 3rem;
    }

    /* ── PREV / NEXT — stay side-by-side, clip long titles ─────────────── */
    .learn-lesson-footer {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    .learn-nav-prev-slot,
    .learn-nav-next-slot {
        min-width: 0; /* allow grid cells to shrink below content size */
        overflow: hidden;
        justify-self: stretch; /* fill the full 1fr cell so both buttons are equal width */
    }
    .learn-nav-btn {
        max-width: 100%;
        width: 100%;
        align-items: flex-start;
        overflow: hidden;
    }
    .learn-nav-btn-next {
        align-items: flex-end;
    }
    .learn-nav-lesson-title {
        max-width: 100%;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    /* ── MISC ────────────────────────────────────────────────────────── */
    .learn-key-metrics-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   10. COURSE OVERVIEW PAGE (learn_index.html)
   ============================================================================ */

.learn-index-hero {
    margin-bottom: 0;
}

.learn-index-title {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    line-height: 1.1;
    margin-bottom: 1.25rem;
}

.learn-index-title-accent {
    color: var(--accent-color);
}

.learn-index-summary {
    font-size: 1.1rem;
    max-width: 640px;
    margin-bottom: 2rem;
}

.learn-index-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    background: var(--accent-color);
    color: #050505;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-decoration: none;
    transition: box-shadow 0.15s;
    margin-bottom: 2.5rem;
}

.learn-index-cta-btn:hover {
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
}

.learn-index-body {
    width: 100%;
}

/* Support callout variant */
.learn-callout--support {
    border-color: var(--accent-color-30);
    background: rgba(0, 255, 65, 0.04);
}

.learn-callout--support .learn-callout-title {
    color: var(--accent-color);
}

/* Module cards grid */
.learn-index-modules {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    margin: 2rem 0 2.5rem;
}

.learn-index-module-card {
    background: var(--surface-lowest);
    border: 1px solid var(--surface-low);
    padding: 1.25rem 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 0.15s;
}

.learn-index-module-card:hover {
    border-color: var(--accent-color-30);
}

.learn-index-module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.learn-index-module-lessons {
    font-family: var(--font-mono);
    font-size: 0.55rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.learn-index-module-title {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.25;
}

.learn-index-module-desc {
    font-family: var(--font-body);
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.55;
    flex: 1;
    margin: 0;
}

.learn-index-module-link {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    text-decoration: none;
    margin-top: 0.5rem;
    display: inline-block;
    transition: opacity 0.12s;
}

.learn-index-module-link:hover {
    opacity: 0.7;
}

@media (max-width: 768px) {
    .learn-index-modules {
        grid-template-columns: 1fr;
    }

    .learn-index-title {
        font-size: 2rem;
    }
}