/* EpilepsyMRI.com - Glassmorphism Design */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Space+Grotesk:wght@500;600;700&display=swap');

/* ===== Light Mode Variables ===== */
:root {
    --color-primary: #2563EB;
    --color-primary-dark: #1D4ED8;
    --color-primary-light: #3B82F6;
    --color-accent: #0EA5E9;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;
    --color-heading: #0F172A;
    --color-text: #1E293B;
    --color-text-light: #475569;
    --color-text-muted: #64748B;
    --color-bg: #F0F9FF;
    --color-bg-alt: #E0F2FE;
    --color-bg-solid: #FFFFFF;
    --color-border: rgba(255,255,255,0.6);
    --color-card-bg: rgba(255,255,255,0.7);
    --color-glass: rgba(255,255,255,0.25);
    --color-glass-border: rgba(255,255,255,0.4);
    --blur-amount: 20px;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
    --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.15);
}

/* ===== Dark Mode Variables ===== */
[data-theme="dark"] {
    --color-heading: #F1F5F9;
    --color-text: #E2E8F0;
    --color-text-light: #94A3B8;
    --color-text-muted: #94A3B8;
    --color-bg: #0F172A;
    --color-bg-alt: #1E293B;
    --color-bg-solid: #1E293B;
    --color-border: rgba(255,255,255,0.1);
    --color-card-bg: rgba(30,41,59,0.7);
    --color-glass: rgba(30,41,59,0.6);
    --color-glass-border: rgba(255,255,255,0.1);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.3);
}
[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3, [data-theme="dark"] h4 { color: #F1F5F9; }

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { 
    font-family: var(--font-body); 
    font-size: 16px; 
    line-height: 1.7; 
    color: var(--color-text); 
    background: var(--color-bg);
    transition: background 0.3s ease, color 0.3s ease;
}

/* ===== Typography ===== */
h1, h2, h3, h4 { 
    font-family: var(--font-heading); 
    font-weight: 700; 
    line-height: 1.35; 
    color: var(--color-heading);
    transition: color 0.3s ease;
}
h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); line-height: 1.4; }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { margin-bottom: 1rem; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }
ul { list-style: none; }

/* ===== Glassmorphism Card ===== */
.glass {
    background: var(--color-glass);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    box-shadow: var(--shadow-glass);
}

/* ===== Layout ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-badge { 
    display: inline-block; 
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); 
    color: white; 
    padding: 0.4rem 1.25rem; 
    border-radius: 50px; 
    font-size: 0.85rem; 
    font-weight: 600; 
    margin-bottom: 1rem;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}
.section-header h2 { margin-bottom: 0.5rem; }
.section-header p { color: var(--color-text-light); font-size: 1.1rem; }

/* ===== Header ===== */
.header { 
    position: sticky; 
    top: 0; 
    background: var(--color-glass);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-bottom: 1px solid var(--color-glass-border);
    z-index: 100;
    transition: all 0.3s ease;
}
.header-content { display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.5rem; }
.logo { display: flex; align-items: center; gap: 0.5rem; font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--color-heading); }
.logo-icon { font-size: 1.75rem; }
.logo-accent { color: var(--color-primary); }
.nav-list { display: flex; gap: 0.5rem; }
.nav-link { padding: 0.5rem 1rem; border-radius: var(--radius-md); font-weight: 500; color: var(--color-text-light); transition: all 0.2s; }
.nav-link:hover { color: var(--color-primary); background: var(--color-card-bg); }
.nav-link.highlight { background: var(--color-primary); color: white; }
.nav-link.highlight:hover { background: var(--color-primary-dark); color: white; }

/* Theme Toggle */
.theme-toggle {
    background: var(--color-card-bg);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all 0.2s;
    margin-right: 0.5rem;
}
.theme-toggle:hover { background: var(--color-glass); transform: scale(1.05); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.hamburger { display: block; width: 24px; height: 2px; background: var(--color-heading); position: relative; transition: background 0.3s; }
.hamburger::before, .hamburger::after { content: ''; position: absolute; width: 24px; height: 2px; background: var(--color-heading); left: 0; transition: background 0.3s; }
.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

@media (max-width: 900px) {
    .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--color-glass); backdrop-filter: blur(var(--blur-amount)); border-bottom: 1px solid var(--color-glass-border); padding: 1rem; }
    .nav.active { display: block; }
    .nav-list { flex-direction: column; }
    .nav-toggle { display: block; }
}

/* ===== Hero ===== */
.hero { 
    position: relative; 
    padding: 6rem 0; 
    overflow: hidden; 
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 50%, var(--color-bg) 100%);
}
.hero-content { max-width: 800px; position: relative; z-index: 1; }
.hero-badge { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    background: var(--color-card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    padding: 0.5rem 1.25rem; 
    border-radius: 50px; 
    font-size: 0.85rem; 
    font-weight: 500; 
    color: var(--color-text); 
    box-shadow: var(--shadow-glass);
    margin-bottom: 1.5rem; 
}
.badge-icon { font-size: 1rem; }
.hero h1 { margin-bottom: 1.5rem; }
.gradient-text { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-lead { font-size: 1.25rem; color: var(--color-text-light); margin-bottom: 2rem; max-width: 65ch; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero-stats { display: flex; gap: 2rem; flex-wrap: wrap; }
.stat { 
    text-align: left;
    padding: 1.25rem;
    background: var(--color-card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glass);
}
.stat-number { display: block; font-family: var(--font-heading); font-size: 2.5rem; font-weight: 700; color: var(--color-primary); }
.stat-label { font-size: 0.85rem; color: var(--color-text-muted); }
.hero-gradient { position: absolute; top: 0; right: 0; width: 50%; height: 100%; background: radial-gradient(circle at 70% 30%, rgba(37, 99, 235, 0.15), transparent 50%); pointer-events: none; }

/* ===== Buttons ===== */
.btn { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    padding: 0.85rem 1.75rem; 
    border-radius: var(--radius-lg); 
    font-weight: 600; 
    font-size: 0.95rem; 
    cursor: pointer; 
    transition: all 0.2s; 
    border: none;
}
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-primary { 
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white; 
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4); }
.btn-outline { 
    background: var(--color-card-bg);
    backdrop-filter: blur(10px);
    color: var(--color-primary); 
    border: 1px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary); color: white; }
.btn:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; }

/* ===== Problem Section ===== */
.problem-section { background: var(--color-bg-alt); }
.problem-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; max-width: 900px; margin: 0 auto; }
@media (max-width: 700px) { .problem-grid { grid-template-columns: 1fr; } }
.problem-card { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem; 
    box-shadow: var(--shadow-glass);
    transition: transform 0.2s, box-shadow 0.2s;
}
.problem-card:hover { transform: translateY(-4px); }
.problem-card.wrong { border-left: 4px solid #EF4444; }
.problem-card.right { border-left: 4px solid #10B981; }
.problem-card .card-icon { font-size: 2rem; margin-bottom: 1rem; }
.problem-card h3 { margin-bottom: 1rem; }
.problem-card ul { margin-bottom: 1.5rem; }
.problem-card li { padding: 0.5rem 0; padding-left: 1.5rem; position: relative; color: var(--color-text-light); }
.problem-card li::before { content: '•'; position: absolute; left: 0; color: var(--color-text-muted); }
.card-result { padding: 0.75rem 1rem; border-radius: var(--radius-md); font-weight: 600; text-align: center; }
.card-result.bad { background: rgba(239, 68, 68, 0.15); color: #EF4444; }
.card-result.good { background: rgba(16, 185, 129, 0.15); color: #10B981; }

/* ===== HARNESS Section ===== */
.harness-section { background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%); }
.harness-section .section-badge { animation: pulse-glow 2s ease-in-out infinite; }
@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(37, 99, 235, 0); }
}
.harness-highlight { 
    display: grid; 
    grid-template-columns: 1fr auto; 
    gap: 3rem; 
    align-items: center; 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2.5rem; 
    margin-bottom: 3rem; 
    box-shadow: var(--shadow-glass);
}
@media (max-width: 700px) { .harness-highlight { grid-template-columns: 1fr; padding: 2rem; } }
.harness-highlight h3 { margin-bottom: 1rem; color: var(--color-primary); }
.check-list li { padding: 0.5rem 0; padding-left: 2rem; position: relative; color: var(--color-text); }
.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--color-success); font-weight: 700; }
.check-list.alert li::before { content: '⚠'; color: var(--color-warning); }
.protocol-badge { text-align: center; }
.badge-3t { display: block; font-family: var(--font-heading); font-size: 4rem; font-weight: 700; background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.badge-label { display: block; font-size: 0.9rem; color: var(--color-text-muted); font-weight: 600; }

.protocol-table-wrapper { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem; 
    box-shadow: var(--shadow-glass);
    margin-bottom: 2rem; 
    overflow-x: auto; 
}
.protocol-table-wrapper h3 { margin-bottom: 1.5rem; }
.protocol-table { width: 100%; border-collapse: collapse; }
.protocol-table th, .protocol-table td { padding: 1rem 1.25rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.protocol-table th { background: var(--color-glass); font-weight: 600; color: var(--color-heading); }
.protocol-table td:first-child { font-weight: 600; color: var(--color-heading); }
.protocol-table tr:last-child td { border-bottom: none; }
.protocol-table tr:hover { background: var(--color-glass); }

.protocol-cta { text-align: center; }
.cta-note { margin-top: 0.75rem; font-size: 0.9rem; color: var(--color-text-muted); }

/* ===== Patient Section ===== */
.patients-section { background: var(--color-bg); }
.patient-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 3rem; }
@media (max-width: 900px) { .patient-cards { grid-template-columns: 1fr; } }
.patient-card { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem;
    box-shadow: var(--shadow-glass);
    transition: transform 0.2s, box-shadow 0.2s;
}
.patient-card:hover { transform: translateY(-4px); }
.patient-card .card-icon { font-size: 2rem; margin-bottom: 1rem; }
.patient-card h3 { margin-bottom: 1rem; }
.patient-card li { padding: 0.5rem 0; padding-left: 1.5rem; position: relative; color: var(--color-text-light); font-size: 0.95rem; }
.patient-card li::before { content: '→'; position: absolute; left: 0; color: var(--color-primary); }

.ask-box { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem;
    box-shadow: var(--shadow-glass);
}
.ask-box h3 { margin-bottom: 1.5rem; }
.ask-questions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
@media (max-width: 600px) { .ask-questions { grid-template-columns: 1fr; } }
.question { 
    background: var(--color-glass);
    padding: 1rem 1.25rem; 
    border-radius: var(--radius-md); 
    font-style: italic; 
    color: var(--color-text); 
    border-left: 3px solid var(--color-primary); 
}

/* ===== Clinicians Section ===== */
.clinicians-section { background: var(--color-bg-alt); }
.clinician-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-bottom: 2rem; }
@media (max-width: 900px) { .clinician-grid { grid-template-columns: 1fr; } }
.checklist-card { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem;
    box-shadow: var(--shadow-glass);
    transition: transform 0.2s;
}
.checklist-card:hover { transform: translateY(-4px); }
.checklist-card h3 { margin-bottom: 1rem; }

.key-principle { 
    display: flex; 
    gap: 1.5rem; 
    align-items: flex-start; 
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.2), rgba(245, 158, 11, 0.1));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(251, 191, 36, 0.3);
    border-radius: var(--radius-xl); 
    padding: 1.5rem 2rem;
}
.principle-icon { font-size: 2rem; }
.principle-content h4 { margin-bottom: 0.5rem; color: #B45309; }
.principle-content p { margin: 0; color: #92400E; }
[data-theme="dark"] .principle-content h4 { color: #FCD34D; }
[data-theme="dark"] .principle-content p { color: #FDE68A; }

/* ===== Findings Section ===== */
.findings-section { background: var(--color-bg); }
.findings-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 700px) { .findings-grid { grid-template-columns: 1fr; } }
.finding-card { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    overflow: hidden;
    box-shadow: var(--shadow-glass);
    transition: transform 0.2s;
}
.finding-card:hover { transform: translateY(-4px); }
.finding-header { display: flex; align-items: center; gap: 1rem; padding: 1.5rem 2rem; background: var(--color-glass); border-bottom: 1px solid var(--color-glass-border); }
.finding-emoji { font-size: 2rem; }
.finding-header h3 { margin: 0; }
.finding-body { padding: 2rem; }
.finding-body ul { margin: 1rem 0; }
.finding-body li { padding: 0.35rem 0; padding-left: 1.5rem; position: relative; color: var(--color-text-light); font-size: 0.95rem; }
.finding-body li::before { content: '•'; position: absolute; left: 0; color: var(--color-primary); }
.finding-note { background: rgba(16, 185, 129, 0.15); color: #059669; padding: 0.75rem 1rem; border-radius: var(--radius-md); font-size: 0.9rem; font-weight: 500; margin-top: 1rem; }
[data-theme="dark"] .finding-note { background: rgba(16, 185, 129, 0.2); color: #6EE7B7; }

/* ===== Resources Section ===== */
.resources-section { background: var(--color-bg-alt); }
.resources-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 700px) { .resources-grid { grid-template-columns: 1fr; } }
.resource-card { 
    background: var(--color-card-bg);
    backdrop-filter: blur(var(--blur-amount));
    border: 1px solid var(--color-glass-border);
    border-radius: var(--radius-xl); 
    padding: 2rem; 
    text-align: center;
    box-shadow: var(--shadow-glass);
    transition: transform 0.2s;
}
.resource-card:hover { transform: translateY(-4px); }
.resource-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.resource-card h3 { margin-bottom: 0.5rem; }
.resource-card p { color: var(--color-text-light); font-size: 0.95rem; margin-bottom: 1.5rem; }

/* ===== CTA Section ===== */
.cta-section { 
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%); 
    color: white;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(255,255,255,0.1), transparent 50%);
}
.cta-content { text-align: center; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }
.cta-content h2 { color: white; margin-bottom: 1rem; }
.cta-content p { color: rgba(255,255,255,0.9); font-size: 1.1rem; margin-bottom: 2rem; }
.cta-section .btn-primary { background: white; color: var(--color-primary); box-shadow: 0 4px 15px rgba(0,0,0,0.2); }
.cta-section .btn-primary:hover { background: rgba(255,255,255,0.9); }

/* ===== About Section ===== */
.about-section { background: var(--color-bg); }
.about-content { max-width: 700px; margin: 0 auto; text-align: center; }
.about-content h2 { margin-bottom: 1.5rem; }
.about-content p { color: var(--color-text-light); }
.about-links { margin-top: 1.5rem; }

/* ===== Footer ===== */
.footer { 
    background: linear-gradient(135deg, #0F172A, #1E293B);
    color: white; 
    padding: 4rem 0 3rem;
}
.footer-content { text-align: center; }
.footer-brand { display: flex; align-items: center; justify-content: center; gap: 0.5rem; font-family: var(--font-heading); font-size: 1.25rem; font-weight: 600; margin-bottom: 1rem; }
.disclaimer { color: rgba(255,255,255,0.7); font-size: 0.85rem; max-width: 600px; margin: 0 auto 1rem; }
.copyright { color: rgba(255,255,255,0.5); font-size: 0.8rem; }

/* ===== Mobile Fixes ===== */
@media (max-width: 600px) {
    .hero-stats { flex-direction: column; gap: 1rem; }
}
@media (max-width: 400px) {
    .hero { padding: 4rem 0; }
    .hero-cta { flex-direction: column; }
    .btn-lg { width: 100%; justify-content: center; }
    .stat-number { font-size: 2rem; }
}