/*
 * Landing Page Styles
 * Reuses design tokens from archive.css (loaded via <link> in HTML)
 */

/* ===== LAYOUT ===== */

.landing-page {
    min-height: 100vh;
    overflow: auto;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-interface);
    line-height: 1.6;
}

/* ===== NAV BAR ===== */

.landing-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-xl);
    max-width: 1100px;
    margin: 0 auto;
}

.landing-nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 16px;
}

.landing-nav-brand svg {
    width: 20px;
    height: 20px;
}

.landing-nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.landing-nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.landing-nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--accent-primary);
    transition: width var(--transition-normal);
}

.landing-nav-links a:hover {
    color: var(--text-primary);
}

.landing-nav-links a:hover::after {
    width: 100%;
}

.landing-nav .theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--space-xs);
    display: flex;
    align-items: center;
}

.landing-nav .theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* ===== AUTH (NAV BAR) ===== */

.landing-auth {
    display: flex;
    align-items: center;
}

/* ===== MOBILE NAV (T4-D, 2026-04-27) =====
   Hamburger drawer for ≤640px. Replaces the prior 2026-04-19 fix that
   only shrank font sizes — that left the bar overflowing at 375px (the
   theme toggle clipped off and the body shifted left). Approach:
   - Hamburger button + close button + backdrop are present in DOM but
     hidden on desktop.
   - At ≤640px, .landing-nav-links converts to a fixed-position drawer
     sliding from the right; same DOM, so #auth-container and
     #theme-toggle keep their IDs (auth.js/theme.js bindings unchanged).
   - body.nav-mobile-open class (set by theme.js click handler) opens
     the drawer + dims the page with a backdrop.
*/
.landing-nav-burger,
.landing-nav-close {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: var(--space-xs);
    align-items: center;
    justify-content: center;
}
.landing-nav-burger svg,
.landing-nav-close svg {
    width: 24px;
    height: 24px;
}
.landing-nav-burger:hover,
.landing-nav-close:hover {
    color: var(--text-primary);
}
.landing-nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 90;
    opacity: 0;
    transition: opacity 0.2s ease;
}
body.nav-mobile-open {
    overflow: hidden;
}

/* ===== HERO ===== */

.landing-hero {
    text-align: center;
    padding: 96px var(--space-xl) 64px;
    max-width: 720px;
    margin: 0 auto;
}

.landing-hero h1 {
    font-size: clamp(30px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 var(--space-lg);
    letter-spacing: -0.8px;
}

.landing-hero h1 .accent {
    color: var(--accent-primary);
    background-image: linear-gradient(to right, var(--accent-primary), var(--accent-primary));
    background-size: 100% 2px;
    background-position: 0 100%;
    background-repeat: no-repeat;
    padding-bottom: 2px;
}

.landing-hero p {
    font-size: clamp(16px, 2vw, 18px);
    color: var(--text-secondary);
    margin: 0 0 var(--space-xl);
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
}

.landing-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 28px;
    background: var(--accent-primary);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.landing-cta:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

.landing-cta:hover svg {
    animation: arrowNudge 0.4s var(--ease-standard);
}

.landing-cta:active {
    transform: scale(0.98);
}

.landing-cta svg {
    width: 16px;
    height: 16px;
}

/* ===== STATS BAR ===== */

.landing-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    padding: var(--space-lg) var(--space-xl);
    max-width: 600px;
    margin: 0 auto;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.landing-stat {
    text-align: center;
}

.landing-stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent-primary);
    letter-spacing: -0.5px;
}

.landing-stat-label {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

/* ===== FEATURES ===== */

.landing-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
}

.landing-feature {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.landing-feature:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-default, var(--border-subtle));
    transform: translateY(-2px);
}

.landing-feature-icon {
    width: 36px;
    height: 36px;
    color: var(--accent-primary);
    margin-bottom: var(--space-md);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.landing-feature:hover .landing-feature-icon {
    color: var(--accent-hover, var(--accent-primary));
    transform: scale(1.05);
}

.landing-feature h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 var(--space-sm);
}

.landing-feature p {
    font-size: 13px;
    color: var(--text-tertiary);
    margin: 0;
    line-height: 1.55;
}

/* ===== SHOWCASE ===== */

.landing-showcase {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
}

.landing-showcase h2 {
    font-size: 20px;
    font-weight: 600;
    margin: 0 0 var(--space-lg);
    text-align: center;
}

.landing-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-md);
}

.landing-showcase-card {
    display: block;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-decoration: none;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.landing-showcase-card:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.landing-showcase-card .opera-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 4px;
}

.landing-showcase-card .opera-composer {
    font-size: 12px;
    color: var(--text-tertiary);
    margin: 0;
}

/* ===== FOOTER ===== */

.landing-footer {
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-xl) var(--space-xl);
    text-align: center;
    max-width: 900px;
    margin: 40px auto 0;
}

.landing-footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-md);
}

.landing-footer-links a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--transition-fast);
    position: relative;
}

.landing-footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width var(--transition-normal);
}

.landing-footer-links a:hover {
    color: var(--text-primary);
}

.landing-footer-links a:hover::after {
    width: 100%;
}

.landing-footer-copy {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0;
}

/* ===== DARK MODE ===== */

[data-theme="dark"] .landing-cta {
    color: #fff;
}

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

/* ===== POPULAR CARD ENHANCEMENT ===== */

.landing-popular-root {
    padding: var(--space-2xl) var(--space-xl) 0;
    max-width: 1100px;
    margin: 0 auto;
}

.landing-popular-root .popular-card {
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.landing-popular-root .popular-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

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

@media (max-width: 600px) {
    .landing-hero {
        padding: 56px var(--space-md) 36px;
    }

    .landing-stats {
        gap: var(--space-md);
    }

    .landing-stat-value {
        font-size: 22px;
    }

    .landing-features {
        grid-template-columns: 1fr;
        padding: var(--space-lg) var(--space-md);
    }

    .landing-showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .landing-nav {
        padding: 12px 16px;
        gap: var(--space-sm);
    }
    .landing-nav-brand {
        font-size: 0.95rem;
    }
}

/* T4-D mobile-nav drawer — kicks in at ≤640px (catches every common
   phone width: SE 320, 12 mini 360, 12/13 390, Pro Max 430). */
@media (max-width: 640px) {
    .landing-nav-burger {
        display: inline-flex;
    }
    .landing-nav-close {
        display: inline-flex;
        position: absolute;
        top: 14px;
        right: 14px;
    }
    .landing-nav-links {
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: min(82vw, 320px);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        padding: 64px 22px 28px;
        background: var(--bg-primary);
        box-shadow: -8px 0 24px rgba(0, 0, 0, 0.12);
        transform: translateX(100%);
        transition: transform 0.25s ease;
        z-index: 100;
        overflow-y: auto;
    }
    .landing-nav-links a.nav-link-desktop {
        font-size: 1rem;
        padding: 14px 4px;
        border-bottom: 1px solid var(--border-color, var(--color-silver, #e5e2da));
    }
    .landing-nav-links a.nav-link-desktop::after {
        display: none; /* underline hover indicator off in drawer */
    }
    .landing-auth {
        margin-top: 18px;
        justify-content: flex-start;
    }
    .landing-nav .theme-toggle {
        margin-top: 12px;
        align-self: flex-start;
    }
    body.nav-mobile-open .landing-nav-links {
        transform: translateX(0);
    }
    body.nav-mobile-open .landing-nav-backdrop {
        display: block;
        opacity: 1;
    }
}

/* =============================================================
   LANDING PAGE — ported from Claude Design (Landing.jsx + styles.css).
   Source: docs/design/claude-design-export/project/ui_kits/webapp/
   ============================================================= */

.lc-landing-page { max-width: 1180px; margin: 0 auto; padding: 0 24px 80px; }

/* HERO */
.lc-landing-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 56px;
    align-items: center;
    padding: 80px 0 64px;
}
.lc-landing-eyebrow { margin-bottom: 16px; display: inline-block; }
.lc-landing-h1 {
    font-family: var(--font-interface);
    font-size: clamp(34px, 4.6vw, 52px);
    line-height: 1.08;
    letter-spacing: -0.03em;
    font-weight: 700;
    margin: 0 0 18px;
}
.lc-landing-sub {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.55;
    margin: 0 0 28px;
    max-width: 540px;
}
.lc-landing-ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.lc-landing-no-signup {
    margin: 14px 0 0;
    font-size: 13px;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* HERO live-demo card */
.lc-landing-hero-demo { position: relative; }
.lc-landing-demo {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 48px -16px rgba(25, 25, 24, 0.18), 0 4px 10px -3px rgba(25, 25, 24, 0.06);
    overflow: hidden;
}
[data-theme="dark"] .lc-landing-demo {
    box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.55), 0 4px 10px -3px rgba(0, 0, 0, 0.4);
}
.lc-landing-demo-chrome {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-tertiary);
    flex-wrap: wrap; gap: 8px 16px;
}
.lc-landing-demo-tabs { display: flex; align-items: center; gap: 12px; }
.lc-landing-demo-meta { font-size: 12px; color: var(--text-tertiary); letter-spacing: -0.005em; }
.lc-landing-demo-toggles { display: flex; gap: 6px; }
.lc-toggle {
    font-family: var(--font-interface);
    font-size: 12px; font-weight: 500;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    display: inline-flex; align-items: center; gap: 6px;
}
.lc-toggle.on { border-color: var(--accent-primary); background: var(--accent-subtle); color: var(--accent-primary); }
.lc-kbd {
    font-family: ui-monospace, 'SF Mono', 'Roboto Mono', Menlo, Consolas, monospace;
    font-size: 10px;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: 1px 5px;
    border-radius: 3px;
    border: 1px solid var(--border-subtle);
}

.lc-landing-demo-body { padding: 22px 26px 28px; position: relative; }
.lc-landing-demo-speaker {
    font: 600 11px var(--font-interface);
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 10px;
}

.lc-line { margin-bottom: 16px; }
.lc-line-text {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 21px;
    line-height: 1.45;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.lc-line-ipa {
    font-family: 'Gentium Plus', 'Doulos SIL', Georgia, serif;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.4;
}
.lc-line-tr {
    font-family: var(--font-interface);
    font-size: 13.5px;
    color: var(--text-tertiary);
    line-height: 1.5;
}
.lc-word--glossed {
    border-bottom: 1px dotted var(--accent-primary);
    color: var(--accent-primary);
    cursor: pointer;
}

.lc-landing-demo-gloss {
    margin-top: 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    box-shadow: var(--shadow-md);
    max-width: 320px;
}
.lc-landing-demo-gloss-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.lc-landing-demo-gloss-word {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 18px; font-weight: 600;
    color: var(--accent-primary);
}
.lc-landing-demo-gloss-pos { font-size: 11px; color: var(--text-tertiary); letter-spacing: .03em; }
.lc-landing-demo-gloss-ipa {
    font-family: 'Gentium Plus', Georgia, serif;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.lc-landing-demo-gloss-def { font-size: 14px; color: var(--text-primary); font-weight: 500; }

/* STATS */
.lc-landing-stats {
    margin: 24px auto 56px;
    max-width: 880px;
    text-align: center;
}
.lc-landing-stats-inner {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 32px;
    padding: 28px 32px;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}
.lc-landing-stat-v {
    font-size: 30px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--accent-primary);
    font-variant-numeric: tabular-nums;
}
.lc-landing-stat-l { font-size: 12px; color: var(--text-tertiary); margin-top: 4px; }
.lc-landing-stats-foot {
    margin-top: 14px;
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.7;
}
.lc-landing-stats-list { color: var(--text-secondary); margin-left: 4px; margin-right: 8px; }
.lc-landing-stats-sep { margin: 0 8px; opacity: .4; }

/* SECTION HEAD shared by HOW + AUDIENCES + FEATURED */
.lc-landing-section-head { text-align: center; margin: 64px 0 28px; }
.lc-landing-section-head h2 {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin: 6px 0 0;
}

/* HOW IT WORKS */
.lc-landing-how { padding: 8px 0 0; }
.lc-landing-how-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    max-width: 1080px;
    margin: 0 auto;
}
.lc-landing-step {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex; flex-direction: column;
    gap: 10px;
}
.lc-landing-step-visual { line-height: 0; }
.lc-landing-step-svg { width: 100%; height: auto; display: block; }
.lc-landing-step-num {
    font: 600 11px var(--font-interface);
    letter-spacing: .14em;
    color: var(--accent-primary);
    margin-top: 6px;
}
.lc-landing-step-title {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0;
    color: var(--text-primary);
}
.lc-landing-step-body {
    font-size: 13.5px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0;
}

/* AUDIENCES */
.lc-landing-audiences { padding: 0 0 56px; }
.lc-landing-audiences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    max-width: 1080px;
    margin: 0 auto;
}
.lc-landing-audience {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 22px;
}
.lc-landing-audience-who {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--text-primary);
    font-family: 'Crimson Text', Georgia, serif;
}
.lc-landing-audience-job {
    font-size: 12px;
    color: var(--accent-primary);
    letter-spacing: .04em;
    text-transform: uppercase;
    font-weight: 600;
    margin-top: 4px; margin-bottom: 12px;
}
.lc-landing-audience-body {
    font-size: 13.5px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0;
}

/* MOBILE */
@media (max-width: 860px) {
    .lc-landing-hero {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 48px 0 40px;
    }
    .lc-landing-stats-inner {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px 20px;
        padding: 22px 18px;
    }
    .lc-landing-stat-v { font-size: 26px; }
    .lc-landing-section-head { margin: 40px 0 20px; }
    .lc-landing-section-head h2 { font-size: 22px; }
}