/**
 * Xingzheng Labs - Landing Page
 * Yellow-Neon Cyber Theme Override
 * Scoped under body.xz-yellow so app.css remains untouched.
 * Vivid neon yellow accent (#fde047 / #facc15) replacing the red palette.
 */

/* ==========================================================================
   LANDING-ONLY FONT & VARIABLE OVERRIDES
   ========================================================================== */
body.xz-yellow {
    --font-display: 'Orbitron', 'JetBrains Mono', var(--font-mono);

    /* Red accent vars -> Yellow-neon equivalents (drives most of app.css) */
    --red-primary: #fde047;
    --red-vivid: #ffee32;
    --red-deep: #eab308;
    --red-dark: #713f12;
    --red-glow: rgba(253, 224, 71, 0.35);
    --red-glow-soft: rgba(253, 224, 71, 0.15);
    --red-glow-strong: rgba(253, 224, 71, 0.6);
    --red-border: rgba(253, 224, 71, 0.22);
    --red-border-hover: rgba(253, 224, 71, 0.75);
    --bg-card-hover: rgba(26, 22, 8, 0.95);
}

/* ==========================================================================
   HYPERLINKABLE RED RAW VALUES (non-variable hardcoded reds)
   Scoped to the landing page only.
   ========================================================================== */
body.xz-yellow .cyber-grid {
    background-image:
        linear-gradient(to right, rgba(253, 224, 71, 0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(253, 224, 71, 0.05) 1px, transparent 1px);
}

/* Header & brand */
body.xz-yellow .app-header {
    border-bottom-color: rgba(253, 224, 71, 0.22);
}

body.xz-yellow .logo-bracket {
    color: var(--red-primary);
    text-shadow: 0 0 12px rgba(253, 224, 71, 0.4);
}

body.xz-yellow .logo-symbol {
    text-shadow: 0 0 14px rgba(253, 224, 71, 0.5);
}

body.xz-yellow .brand-subtitle {
    color: var(--red-primary);
    text-shadow: 0 0 8px rgba(253, 224, 71, 0.3);
}

/* Terminal banner header border */
body.xz-yellow .terminal-banner {
    border-color: rgba(253, 224, 71, 0.25);
}

body.xz-yellow .terminal-banner-header {
    border-bottom-color: rgba(253, 224, 71, 0.15);
}

body.xz-yellow .terminal-badge {
    background: rgba(253, 224, 71, 0.12);
    border-color: rgba(253, 224, 71, 0.35);
    color: var(--red-primary);
}

body.xz-yellow .prompt-user {
    color: var(--red-primary);
}

/* Search / filter input focus */
body.xz-yellow .tool-filter-input:focus {
    border-color: var(--red-primary);
    box-shadow: 0 0 12px rgba(253, 224, 71, 0.35);
}

body.xz-yellow .node-count-badge {
    border-color: rgba(253, 224, 71, 0.3);
}

body.xz-yellow .node-count-num {
    color: var(--red-primary);
}

/* Section headers */
body.xz-yellow .section-icon {
    color: var(--red-primary);
    filter: drop-shadow(0 0 6px rgba(253, 224, 71, 0.4));
}

body.xz-yellow .section-divider-line {
    background: linear-gradient(to right,
            rgba(253, 224, 71, 0.3),
            rgba(253, 224, 71, 0.05) 80%,
            transparent);
}

/* Tool cards (feature grid) */
body.xz-yellow .tool-card {
    border-color: rgba(253, 224, 71, 0.3);
}

body.xz-yellow .tool-card .card-glow {
    background: radial-gradient(circle at 50% 50%,
            rgba(253, 224, 71, 0.16),
            transparent 65%);
}

body.xz-yellow .tool-card:hover {
    border-color: rgba(253, 224, 71, 0.75);
    background: var(--bg-card-hover);
    box-shadow:
        0 14px 36px rgba(0, 0, 0, 0.7),
        0 0 24px rgba(253, 224, 71, 0.18);
}

body.xz-yellow .tool-card:focus-visible {
    border-color: var(--red-primary);
    box-shadow:
        0 0 0 3px rgba(253, 224, 71, 0.4),
        0 0 20px rgba(253, 224, 71, 0.3);
}

body.xz-yellow .tool-badge {
    background: rgba(253, 224, 71, 0.12);
    border-color: rgba(253, 224, 71, 0.35);
    color: var(--red-primary);
}

body.xz-yellow .tool-card:hover .tool-ext-indicator {
    color: var(--red-primary);
}

body.xz-yellow .tool-icon-box {
    background: rgba(253, 224, 71, 0.08);
    border-color: rgba(253, 224, 71, 0.25);
}

body.xz-yellow .tool-card:hover .tool-icon-box {
    background: rgba(253, 224, 71, 0.2);
    border-color: var(--red-primary);
    box-shadow: 0 0 18px rgba(253, 224, 71, 0.3);
}

body.xz-yellow .tool-card:hover .tool-main-icon {
    color: var(--red-primary);
    filter: drop-shadow(0 0 6px rgba(253, 224, 71, 0.4));
}

body.xz-yellow .tool-card:hover .tool-launch-text,
body.xz-yellow .tool-card:hover .tool-arrow-icon {
    color: var(--red-primary);
}

/* Primary buttons & CTA */
body.xz-yellow .cyber-btn-primary,
body.xz-yellow .cyber-submit-btn {
    background: linear-gradient(135deg, #fde047 0%, #eab308 50%, #a16207 100%);
    border-color: rgba(250, 204, 21, 0.6);
    color: #1c1917;
    box-shadow: 0 4px 18px rgba(253, 224, 71, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.45);
    text-shadow: none;
}

body.xz-yellow .cyber-btn-primary:hover,
body.xz-yellow .cyber-submit-btn:hover {
    background: linear-gradient(135deg, #fef08a 0%, #fde047 50%, #d97706 100%);
    border-color: #fef08a;
    box-shadow: 0 6px 26px rgba(253, 224, 71, 0.55), 0 0 14px rgba(253, 224, 71, 0.35);
    color: #1c1917;
}

/* Footer */
body.xz-yellow .app-footer {
    border-top-color: rgba(253, 224, 71, 0.22);
}

body.xz-yellow .footer-brand i {
    color: var(--red-primary);
    filter: drop-shadow(0 0 4px rgba(253, 224, 71, 0.4));
}

/* Scrollbar */
body.xz-yellow ::-webkit-scrollbar-thumb {
    background: rgba(253, 224, 71, 0.3);
}

body.xz-yellow ::-webkit-scrollbar-thumb:hover {
    background: var(--red-primary);
    box-shadow: 0 0 10px rgba(253, 224, 71, 0.4);
}

/* Status online pill already green via vars — keep. Logout / pill borders */
body.xz-yellow .system-status-indicator {
    border-color: rgba(253, 224, 71, 0.25);
}

body.xz-yellow .live-clock-widget i {
    color: var(--red-primary);
}

/* Language switch in header */
.xz-lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
}

.xz-lang-link {
    color: var(--text-muted);
    text-decoration: none;
    letter-spacing: 0.06em;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.xz-lang-link:hover {
    color: #ffffff;
    background: rgba(253, 224, 71, 0.12);
    border-color: rgba(253, 224, 71, 0.3);
}

.xz-lang-link.active {
    color: var(--red-primary);
    background: rgba(253, 224, 71, 0.14);
    border-color: rgba(253, 224, 71, 0.45);
    box-shadow: 0 0 12px rgba(253, 224, 71, 0.2);
    text-shadow: 0 0 8px rgba(253, 224, 71, 0.35);
}

.xz-lang-sep {
    color: var(--text-dim);
}

/* Rotating quote */
.xz-quote {
    position: relative;
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 600;
    line-height: 1.6;
    color: #f5f3f0;
    max-width: 720px;
    padding: 18px 26px;
    border-left: 3px solid var(--red-primary);
    background: rgba(253, 224, 71, 0.04);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    box-shadow: inset 0 0 24px rgba(253, 224, 71, 0.06);
    min-height: 76px;
    display: flex;
    align-items: center;
    text-shadow: 0 0 12px rgba(253, 224, 71, 0.2);
}

.xz-quote::before {
    content: '\201C';
    position: absolute;
    top: -6px;
    left: 12px;
    font-size: 2.4rem;
    color: var(--red-primary);
    opacity: 0.55;
    text-shadow: 0 0 14px rgba(253, 224, 71, 0.5);
}

.xz-quote-fade {
    animation: xzQuoteFade 0.9s var(--ease-cyber);
}

@keyframes xzQuoteFade {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero centered variant (only hero section present) */
.xz-hero-centered {
    min-height: calc(100vh - 140px);
    justify-content: center;
}

/* ==========================================================================
   LANDING PAGE LAYOUT SPECIFICS
   ========================================================================== */
.xz-hero {
    position: relative;
    z-index: 10;
    max-width: 1360px;
    margin: 0 auto;
    padding: 96px 24px 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
}

.xz-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--red-primary);
    background: rgba(253, 224, 71, 0.08);
    border: 1px solid rgba(253, 224, 71, 0.3);
    padding: 8px 18px;
    border-radius: var(--radius-full);
    box-shadow: 0 0 18px rgba(253, 224, 71, 0.15);
}

.xz-hero-eyebrow .status-dot {
    background-color: var(--status-online);
    box-shadow: 0 0 8px var(--status-online-glow);
    animation: statusPulse 2s infinite ease-in-out;
}

.xz-hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.05;
    color: #ffffff;
    letter-spacing: 0.02em;
    text-shadow: 0 0 24px rgba(253, 224, 71, 0.35);
}

.xz-hero-title .accent {
    color: var(--red-primary);
    text-shadow: 0 0 30px rgba(253, 224, 71, 0.55);
}

.xz-hero-zh {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.14em;
}

.xz-hero-desc {
    font-family: var(--font-sans);
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--text-secondary);
    max-width: 720px;
    line-height: 1.7;
}

.xz-hero-desc .zh {
    display: block;
    margin-top: 10px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}

.xz-cta-row {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 8px;
}

.xz-hero-stats {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 16px;
}

.xz-hero-stats .cyber-stat-box {
    background: rgba(253, 224, 71, 0.05);
    border-color: rgba(253, 224, 71, 0.18);
    text-align: center;
    min-width: 120px;
}

.xz-hero-stats .cyber-stat-val {
    color: var(--red-primary);
    text-shadow: 0 0 12px rgba(253, 224, 71, 0.4);
}

.xz-hero-stats .cyber-stat-lbl {
    color: var(--text-muted);
}

/* About section container (reuses main-container) */
.xz-about {
    max-width: 1360px;
    margin: 0 auto;
    padding: 32px 24px 24px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.xz-section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.xz-section-head .section-heading {
    font-family: var(--font-display);
    font-size: 1.4rem;
    letter-spacing: 0.08em;
}

.xz-section-sub {
    max-width: 560px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    text-align: right;
}

@media (max-width: 767px) {
    .xz-hero {
        padding: 72px 20px 48px;
        gap: 20px;
    }

    .xz-about {
        padding: 24px 16px 16px;
    }

    .xz-section-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .xz-section-sub {
        text-align: left;
    }

    .xz-cta-row {
        flex-direction: column;
        width: 100%;
    }

    .xz-cta-row .cyber-btn {
        width: 100%;
    }
}