* { margin: 0; padding: 0; box-sizing: border-box; }

        :root {
            --primary-navy: #1e3d6f;
            --primary-blue: #2c5aa0;
            --primary-cyan: #06b6d4;
            --accent-cyan: #4fc3f7;
            --accent-green: #10b981;
            --accent-orange: #f39c12;
            --warning-yellow: #f59e0b;
            --text-dark: #2d2d2d;
            --text-light: #555;
            --background-light: #f8f9fa;
            --background-white: #ffffff;
            --border-light: #e5e7eb;
            --shadow-sm: 0 2px 10px rgba(0,0,0,0.1);
            --shadow-md: 0 5px 15px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
        }

        [data-theme="dark"] {
            --primary-navy: #4fc3f7;
            --primary-blue: #3b82f6;
            --primary-cyan: #22d3ee;
            --accent-cyan: #06b6d4;
            --text-dark: #f0f0f0;
            --text-light: #d0d0d0;
            --background-light: #1a1a1a;
            --background-white: #2d2d2d;
            --border-light: #374151;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
            background: var(--background-white);
            transition: background-color 0.3s, color 0.3s;
        }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

        /* ===== HEADER (matches site standard) ===== */
        .header {
            background: var(--background-white);
            box-shadow: var(--shadow-sm);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo { height: 56px; }
        .logo-img { height: 100%; width: auto; }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 0.85rem;
            align-items: center;
        }

        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 600;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            padding: 0.5rem 0;
            transition: color 0.3s ease;
        }

        .nav-link:hover, .nav-link.active { color: var(--primary-blue); }
        [data-theme="dark"] .nav-link { color: white; }
        [data-theme="dark"] .nav-link:hover, [data-theme="dark"] .nav-link.active { color: var(--primary-cyan); }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--primary-blue);
        }
        [data-theme="dark"] .nav-link.active::after { background: var(--primary-cyan); }

        .theme-toggle {
            background: none;
            border: 1px solid var(--border-light);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            font-size: 1.1rem;
            cursor: pointer;
        }

        .mobile-menu-button {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-dark);
        }

        /* ===== HERO ===== */
        .hero {
            position: relative;
            min-height: 320px;
            background-image: linear-gradient(rgba(30, 61, 111, 0.75), rgba(30, 61, 111, 0.85)), url('/assets/images/backgrounds/Hero-Symposium.webp');
            background-size: cover;
            background-position: center;
            color: white;
            display: flex;
            align-items: center;
            padding: 3rem 0;
        }

        .hero-content { text-align: center; }
        .hero-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 700; margin-bottom: 1rem; }
        .hero-subtitle { font-size: clamp(1rem, 2vw, 1.25rem); max-width: 720px; margin: 0 auto; opacity: 0.95; }

        /* ===== INTRO ===== */
        .intro-section { padding: 3rem 0 1.5rem; }
        .intro-section p {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-light);
        }

        /* ===== EVENT CARDS ===== */
        .events-section { padding: 2rem 0 4rem; }

        .event-card {
            background: var(--background-light);
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 3rem;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }

        .event-card.placeholder {
            border: 2px dashed var(--border-light);
            background: transparent;
        }

        .event-header {
            padding: 2rem 2.5rem 1.25rem;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: flex-end;
            justify-content: space-between;
        }

        .event-title-block h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            color: var(--primary-navy);
            margin-bottom: 0.4rem;
        }
        [data-theme="dark"] .event-title-block h2 { color: var(--primary-cyan); }

        .event-title-block .event-meta {
            color: var(--text-light);
            font-size: 0.95rem;
        }

        .event-badge {
            background: var(--primary-blue);
            color: white;
            padding: 0.4rem 1rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .event-badge.recent { background: var(--accent-green); }
        .event-badge.inaugural { background: var(--accent-orange); }

        .event-body { padding: 2rem 2.5rem; }

        .event-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 2rem;
            align-items: start;
        }

        .photo-strip {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 8px;
            border-radius: 12px;
            overflow: hidden;
            min-height: 320px;
        }

        .photo-strip img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .photo-strip img:first-child { grid-row: span 2; }

        .video-gallery {
            margin-top: 1rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 10px;
        }

        .video-gallery video {
            width: 100%;
            height: 100%;
            border-radius: 12px;
            display: block;
            background: #000;
            max-height: 380px;
            object-fit: cover;
        }

        .video-gallery .video-slot-placeholder {
            border: 2px dashed var(--border-light);
            border-radius: 12px;
            min-height: 160px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 0.9rem;
            text-align: center;
            padding: 1rem;
            background: var(--background-white);
        }

        .video-gallery-label {
            margin: 1.5rem 0 0.5rem;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--text-light);
            font-weight: 600;
        }

        .event-details h3 {
            font-size: 1.1rem;
            color: var(--primary-navy);
            margin: 1.25rem 0 0.5rem;
        }
        [data-theme="dark"] .event-details h3 { color: var(--primary-cyan); }

        .event-details h3:first-child { margin-top: 0; }

        .event-details ul {
            list-style: none;
            padding: 0;
        }

        .event-details ul li {
            padding: 0.5rem 0 0.5rem 1.5rem;
            position: relative;
            color: var(--text-dark);
        }

        .event-details ul li::before {
            content: '\25B6';
            color: var(--primary-blue);
            position: absolute;
            left: 0;
            font-size: 0.8rem;
            top: 0.7rem;
        }

        .speaker-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .speaker-chip {
            background: var(--background-white);
            color: var(--text-dark);
            padding: 0.4rem 0.85rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-light);
        }
        [data-theme="dark"] .speaker-chip { background: rgba(79, 195, 247, 0.1); color: var(--text-dark); border-color: var(--primary-cyan); }

        .placeholder-note {
            background: rgba(245, 158, 11, 0.08);
            border-left: 4px solid var(--warning-yellow);
            padding: 1rem 1.25rem;
            border-radius: 8px;
            color: var(--text-light);
            font-style: italic;
        }

        /* ===== UPCOMING CTA ===== */
        .upcoming-cta {
            background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
            color: white;
            padding: 3rem 2rem;
            border-radius: 20px;
            text-align: center;
            margin: 3rem auto;
            max-width: 1100px;
        }

        .upcoming-cta h2 {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            margin-bottom: 0.75rem;
        }

        .upcoming-cta p { font-size: 1.05rem; opacity: 0.95; margin-bottom: 1.5rem; }

        .upcoming-cta a.btn {
            display: inline-block;
            background: var(--accent-orange);
            color: white;
            padding: 0.9rem 2rem;
            border-radius: 999px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .upcoming-cta a.btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.25);
        }

        /* ===== FOOTER (matches site standard) ===== */
        .footer {
            background: var(--primary-navy);
            color: white;
            padding: 3rem 0 1rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .footer-section h3, .footer-section h4 {
            color: var(--accent-cyan);
            margin-bottom: 1rem;
        }

        .footer-tagline { font-style: italic; margin-bottom: 1rem; opacity: 0.9; }

        .footer-section ul { list-style: none; }
        .footer-section ul li { margin-bottom: 0.5rem; }
        .footer-section a { color: white; text-decoration: none; opacity: 0.85; transition: opacity 0.2s; }
        .footer-section a:hover { opacity: 1; }

        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.2);
            opacity: 0.8;
            font-size: 0.9rem;
        }

        .footer-bottom a { color: var(--accent-cyan); text-decoration: none; }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 900px) {
            .nav-menu { display: none; gap: 0.75rem; }
            .nav-menu.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--background-white);
                padding: 1rem;
                box-shadow: var(--shadow-md);
            }
            .mobile-menu-button { display: block; }

            .event-grid { grid-template-columns: 1fr; }
            .event-header { flex-direction: column; align-items: flex-start; }
            .photo-strip { min-height: 240px; }
            .footer-content { grid-template-columns: 1fr; text-align: center; }
        }

        @media (max-width: 600px) {
            .event-body, .event-header { padding-left: 1.25rem; padding-right: 1.25rem; }
            .photo-strip { grid-template-columns: 1fr; grid-template-rows: auto; }
            .photo-strip img:first-child { grid-row: auto; }
        }