/* HEPA Lab Website Styles */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1a3a5c;
    --primary-dark: #0f2540;
    --accent: #c9a227;
    --accent-light: #e8c94a;
    --text: #2c2c2c;
    --text-light: #666;
    --bg: #f8f9fa;
    --white: #fff;
    --border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.12);
}
body { font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif; color: var(--text); background: var(--white); line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }

/* Header */
.site-header { background: var(--primary-dark); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--white); font-size: 1.4rem; font-weight: 700; }
.logo:hover { color: var(--accent-light); }
.logo-img { width: 40px; height: 40px; border-radius: 8px; object-fit: cover; }
.main-nav { display: flex; gap: 5px; }
.main-nav a { color: rgba(255,255,255,0.85); padding: 8px 14px; border-radius: 6px; font-size: 0.95rem; transition: all 0.2s; }
.main-nav a:hover, .main-nav a.active { color: var(--white); background: rgba(255,255,255,0.1); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 5px; }
.nav-toggle span { display: block; width: 25px; height: 3px; background: var(--white); margin: 5px 0; border-radius: 2px; transition: 0.3s; }

/* Hero */
.hero { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); color: var(--white); padding: 80px 0; text-align: center; }
.hero h1 { font-size: 2.8rem; margin-bottom: 15px; font-weight: 800; }
.hero p { font-size: 1.2rem; opacity: 0.9; max-width: 700px; margin: 0 auto 30px; }
.hero-buttons { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: 1rem; cursor: pointer; border: none; transition: all 0.2s; text-align: center; }
.btn-primary { background: var(--accent); color: var(--primary-dark); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--white); }
.btn-outline:hover { background: var(--white); color: var(--primary); }
.btn-sm { padding: 8px 18px; font-size: 0.9rem; }

/* Sections */
.section { padding: 60px 0; }
.section-alt { background: var(--bg); }
.section-title { font-size: 2rem; text-align: center; margin-bottom: 10px; color: var(--primary); }
.section-subtitle { text-align: center; color: var(--text-light); margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* Cards Grid */
.grid { display: grid; gap: 25px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--white); border-radius: 12px; padding: 25px; box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s; border: 1px solid var(--border); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card h3 { color: var(--primary); margin-bottom: 10px; font-size: 1.2rem; }
.card p { color: var(--text-light); font-size: 0.95rem; }
.card-meta { font-size: 0.85rem; color: var(--text-light); margin-bottom: 10px; display: flex; gap: 15px; flex-wrap: wrap; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-pinned { background: #fff3cd; color: #856404; }
.badge-category { background: #e8f0fe; color: var(--primary); }

/* Team */
.team-card { text-align: center; }
.team-photo { width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 15px; background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 2.5rem; color: var(--primary); overflow: hidden; }
.team-photo img { width: 100%; height: 100%; object-fit: cover; }
.team-card h3 { margin-bottom: 5px; }
.team-title { color: var(--accent); font-weight: 600; font-size: 0.9rem; margin-bottom: 10px; }
.team-filters { display: flex; gap: 10px; justify-content: center; margin-bottom: 30px; flex-wrap: wrap; }
.filter-btn { padding: 8px 20px; border: 2px solid var(--primary); background: transparent; color: var(--primary); border-radius: 25px; cursor: pointer; font-weight: 600; transition: all 0.2s; }
.filter-btn:hover, .filter-btn.active { background: var(--primary); color: var(--white); }

/* Detail Page */
.detail-page { padding: 50px 0; }
.detail-header { margin-bottom: 30px; }
.detail-header h1 { color: var(--primary); font-size: 2.2rem; margin-bottom: 10px; }
.detail-meta { color: var(--text-light); margin-bottom: 20px; display: flex; gap: 20px; flex-wrap: wrap; }
.detail-content { font-size: 1.05rem; line-height: 1.8; color: var(--text); }
.detail-content p { margin-bottom: 15px; }
.back-link { display: inline-block; margin-bottom: 20px; color: var(--primary); font-weight: 600; }
.pdf-link { display: inline-block; margin-top: 30px; padding: 12px 28px; background: var(--accent); color: var(--primary-dark); border-radius: 8px; font-weight: 700; }
.pdf-link:hover { background: var(--accent-light); }

/* Forms */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; color: var(--text); }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; font-family: inherit; }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,58,92,0.1); }
textarea.form-control { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* Footer */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.8); padding: 50px 0 0; margin-top: 60px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-col h3 { color: var(--white); margin-bottom: 15px; font-size: 1.1rem; }
.footer-col p { margin-bottom: 10px; font-size: 0.9rem; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 0.85rem; }

/* Admin */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar { width: 250px; background: var(--primary-dark); color: var(--white); padding: 20px 0; position: fixed; height: 100vh; overflow-y: auto; }
.admin-sidebar .admin-logo { padding: 0 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.1); margin-bottom: 15px; display: flex; align-items: center; gap: 10px; }
.admin-sidebar .admin-logo img { width: 35px; height: 35px; border-radius: 6px; }
.admin-sidebar .admin-logo span { font-weight: 700; font-size: 1.1rem; }
.admin-nav a { display: block; padding: 12px 20px; color: rgba(255,255,255,0.8); font-size: 0.95rem; transition: all 0.2s; }
.admin-nav a:hover, .admin-nav a.active { background: rgba(255,255,255,0.1); color: var(--white); padding-left: 25px; }
.admin-nav .nav-section { padding: 15px 20px 5px; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,0.5); }
.admin-content { margin-left: 250px; flex: 1; padding: 30px; background: var(--bg); min-height: 100vh; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 30px; }
.admin-header h1 { color: var(--primary); font-size: 1.8rem; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 30px; }
.stat-card { background: var(--white); padding: 25px; border-radius: 12px; box-shadow: var(--shadow); }
.stat-card .stat-number { font-size: 2.5rem; font-weight: 800; color: var(--primary); }
.stat-card .stat-label { color: var(--text-light); font-size: 0.9rem; margin-top: 5px; }
.admin-table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.admin-table th { background: var(--primary); color: var(--white); padding: 14px; text-align: left; font-size: 0.9rem; }
.admin-table td { padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 0.9rem; }
.admin-table tr:hover { background: var(--bg); }
.admin-actions { display: flex; gap: 8px; }
.btn-edit { background: #e8f0fe; color: var(--primary); padding: 5px 12px; border-radius: 6px; font-size: 0.85rem; border: none; cursor: pointer; }
.btn-delete { background: #fde8e8; color: #c0392b; padding: 5px 12px; border-radius: 6px; font-size: 0.85rem; border: none; cursor: pointer; }
.btn-pin { background: #fff3cd; color: #856404; padding: 5px 12px; border-radius: 6px; font-size: 0.85rem; border: none; cursor: pointer; }
.alert { padding: 15px 20px; border-radius: 8px; margin-bottom: 20px; }
.alert-success { background: #d4edda; color: #155724; }
.alert-error { background: #f8d7da; color: #721c24; }
.login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary-dark), var(--primary)); }
.login-box { background: var(--white); padding: 40px; border-radius: 16px; box-shadow: var(--shadow-lg); width: 100%; max-width: 400px; }
.login-box h2 { text-align: center; color: var(--primary); margin-bottom: 5px; }
.login-box .login-subtitle { text-align: center; color: var(--text-light); margin-bottom: 30px; font-size: 0.9rem; }
.login-box .btn { width: 100%; }

/* Responsive */
@media (max-width: 992px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .admin-sidebar { width: 200px; }
    .admin-content { margin-left: 200px; }
}
@media (max-width: 768px) {
    .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--primary-dark); flex-direction: column; padding: 15px; gap: 5px; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px; }
    .nav-toggle { display: block; }
    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .admin-layout { flex-direction: column; }
    .admin-sidebar { position: relative; width: 100%; height: auto; }
    .admin-content { margin-left: 0; padding: 20px; }
    .section { padding: 40px 0; }
    .hero { padding: 50px 0; }
}