/**
 * Intro landing — extracted from NeuroDetect_Pro.html
 * Load AFTER bootstrap.min.css on body.page-intro only
 */

:root {
    --primary: #0d0d0d;
    --accent: #c9a84c;
    --accent2: #e8c96a;
    --surface: #ffffff;
    --surface2: #f7f6f2;
    --border: #e2e0d8;
    --text: #1a1a1a;
    --muted: #6b6860;
    --success: #16a34a;
    --danger: #dc2626;
    --info: #2563eb;
    --shadow-lg: 0 16px 48px rgba(0,0,0, 0.12);
}

body.page-intro {
    font-family: 'DM Sans', sans-serif;
    background: var(--surface2);
    color: var(--text);
    overflow-x: hidden;
}

body.page-intro h1,
body.page-intro h2,
body.page-intro h3,
body.page-intro h4,
body.page-intro h5,
body.page-intro h6,
body.page-intro .logo-text {
    font-family: 'Syne', sans-serif;
}

/* EEG background */
body.page-intro .eeg-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.06;
}

body.page-intro .eeg-line {
    animation: ipEegScroll 6s linear infinite;
}

@keyframes ipEegScroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* Intro page shell */
body.page-intro #introPage {
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

body.page-intro .intro-nav {
    position: sticky;
    top: 0;
    z-index: 900;
    background: rgba(13, 13, 13, 0.97);
    backdrop-filter: blur(20px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}

body.page-intro .logo-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.01em;
}

body.page-intro .logo-text span {
    color: #fff;
}

body.page-intro .logo-text .logo-accent {
    color: var(--accent);
}

body.page-intro .intro-logo-img {
    height: 42px;
    width: auto;
    object-fit: contain;
}

body.page-intro .intro-hero {
    padding: 7rem 0 5rem;
    text-align: center;
    position: relative;
}

body.page-intro .intro-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(201, 168, 76, 0.12);
    border: 1px solid rgba(201, 168, 76, 0.3);
    color: var(--accent);
    padding: 0.4rem 1.2rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 2rem;
}

body.page-intro .intro-hero h1 {
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.03em;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

body.page-intro .intro-hero h1 .gold {
    color: var(--accent);
}

/* Override Bootstrap .lead */
body.page-intro #introPage .intro-hero .lead {
    font-size: 1.15rem;
    color: var(--muted);
    max-width: 680px;
    margin: 0 auto 3rem;
    line-height: 1.7;
    font-weight: 400;
}

/* Buttons — scoped so Bootstrap .btn-* never wins */
body.page-intro #introPage .btn-gold {
    background: var(--accent);
    color: var(--primary);
    border: none;
    padding: 0.85rem 2.2rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.95rem;
    font-family: 'Syne', sans-serif;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
}

body.page-intro #introPage .btn-gold:hover {
    background: var(--accent2);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(201, 168, 76, 0.5);
    color: var(--primary);
}

body.page-intro #introPage .btn-dark {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 0.85rem 2.2rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.95rem;
    font-family: 'Syne', sans-serif;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

body.page-intro #introPage .btn-dark:hover {
    background: #222;
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    color: #fff;
}

body.page-intro #introPage .btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 0.8rem 2rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.25s ease;
}

body.page-intro #introPage .btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

body.page-intro #introPage .intro-nav .btn-outline {
    color: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.35);
}

body.page-intro #introPage .intro-nav .btn-outline:hover {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
}

body.page-intro #introPage .intro-nav .btn-gold,
body.page-intro #introPage .intro-nav .btn-outline {
    padding: 0.5rem 1.4rem;
    font-size: 0.875rem;
}

body.page-intro .features-grid {
    padding: 5rem 0;
}

body.page-intro .module-card {
    background: #fff;
    border-radius: 24px;
    padding: 2.5rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    height: 100%;
}

body.page-intro .module-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

body.page-intro .module-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

body.page-intro .module-card:hover::before {
    transform: scaleX(1);
}

body.page-intro .module-icon {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

body.page-intro .module-tag {
    display: inline-block;
    background: rgba(201, 168, 76, 0.1);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    margin-bottom: 0.8rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

body.page-intro .stats-bar {
    background: var(--primary);
    padding: 3rem 0;
    margin: 4rem 0;
}

body.page-intro .stat-item {
    text-align: center;
}

body.page-intro .stat-item .num {
    font-family: 'Syne', sans-serif;
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--accent);
}

body.page-intro .stat-item .label {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-top: 0.3rem;
}

body.page-intro .intro-cta {
    background: var(--primary);
    padding: 5rem 0;
    text-align: center;
    position: relative;
}

body.page-intro .intro-cta .container {
    position: relative;
    z-index: 1;
}

body.page-intro .intro-cta h2 {
    font-size: 2.5rem;
    color: #fff;
    font-weight: 800;
    margin-bottom: 1rem;
}

body.page-intro .intro-cta p {
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 2.5rem;
    font-size: 1rem;
}

body.page-intro #introPage .btn-cta {
    font-size: 1.05rem;
    padding: 1rem 3rem;
}

body.page-intro .intro-footer {
    background: #0a0a0a;
    color: rgba(255, 255, 255, 0.3);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.85rem;
}

body.page-intro .features-head h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-top: 1rem;
}

body.page-intro .features-head p {
    color: var(--muted);
    margin-top: 0.75rem;
    font-size: 1rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

body.page-intro .module-card h5 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

body.page-intro .module-card p {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.65;
    margin-bottom: 0;
}

/* Toast */
body.page-intro .toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

body.page-intro .toast-msg {
    background: var(--primary);
    color: #fff;
    padding: 0.9rem 1.4rem;
    border-radius: 14px;
    font-size: 0.9rem;
    box-shadow: var(--shadow-lg);
    animation: ipToastIn 0.3s ease;
    max-width: 320px;
}

body.page-intro .toast-msg.success { border-left: 4px solid var(--success); }
body.page-intro .toast-msg.danger { border-left: 4px solid var(--danger); }
body.page-intro .toast-msg.info { border-left: 4px solid var(--info); }

@keyframes ipToastIn {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

/* Lang float */
body.page-intro .lang-float {
    position: fixed;
    bottom: 28px;
    right: 24px;
    z-index: 999;
    display: flex;
    gap: 0.4rem;
    background: #fff;
    padding: 0.4rem;
    border-radius: 999px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

body.page-intro .lang-btn {
    padding: 0.4rem 0.9rem;
    border: none;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    background: transparent;
    color: var(--muted);
}

body.page-intro .lang-btn.active {
    background: var(--primary);
    color: #fff;
}

body.page-intro .lang-btn-theme {
    padding: 0.4rem 0.7rem;
}

/* Dark mode */
body.page-intro.dark-mode {
    background: #141414;
    color: #f0f0f0;
}

body.page-intro.dark-mode .intro-hero h1,
body.page-intro.dark-mode .features-head h2 {
    color: #fff;
}

body.page-intro.dark-mode .module-card {
    background: #1c1c1c;
    border-color: #2a2a2a;
}

body.page-intro.dark-mode .stats-bar {
    background: #0a0a0a;
}

body.page-intro.dark-mode .lang-float {
    background: #1c1c1c;
    border-color: #2a2a2a;
}

body.page-intro.dark-mode .lang-btn.active {
    background: var(--accent);
    color: var(--primary);
}

body.page-intro[dir="rtl"] .lang-float {
    right: auto;
    left: 24px;
}

body.page-intro[dir="rtl"] .toast-container {
    right: auto;
    left: 20px;
}

@media (max-width: 768px) {
    body.page-intro .intro-hero h1 {
        font-size: 2.2rem;
    }
}