/* ==========================================================================
           FULL INHERITANCE FROM MAIN SCHOOL STYLESHEET (same variables, components)
           Extended with club-specific layouts while preserving original design system
           ========================================================================== */
        :root {
            --primary-blue: #006652;
            --secondary-blue: #0056b3;
            --accent-gold: #dea704;
            --white: #FFFFFF;
            --light-gray: #f8f9fa;
            --medium-gray: #6c757d;
            --dark-gray: #343a40;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
            /* Club accent colors */
            --physics-club: #0d6efd;
            --chemistry-club: #198754;
            --biology-club: #fd7e14;
            --math-club: #6f42c1;
            --cs-club: #d63384;
        }

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

        body {
            font-family: 'Roboto', sans-serif;
            line-height: 1.6;
            color: var(--dark-gray);
            background-color: var(--white);
            overflow-x: hidden;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Typography (matching main site) */
        h1, h2, h3, h4 {
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            line-height: 1.3;
        }

        h2 {
            font-size: 2rem;
            color: var(--primary-blue);
            position: relative;
            padding-bottom: 10px;
            margin-bottom: 1.5rem;
        }
        h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--accent-gold);
        }

        /* Top Bar (identical to main site) */
        .top-bar {
            background-color: var(--primary-blue);
            color: var(--white);
            padding: 8px 0;
            font-size: 0.9rem;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .social-icons a {
            color: var(--white);
            margin-right: 15px;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .social-icons a:hover { color: var(--accent-gold); transform: translateY(-2px); }
        .contact-top span { margin-left: 20px; }
        .contact-top i { margin-right: 5px; color: var(--accent-gold); }

        /* Main Header */
        .main-header {
            background-color: var(--white);
            padding: 15px 0;
            box-shadow: var(--shadow);
        }
        .main-header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .logo { height: 80px; width: auto; }
        .school-name h1 { font-size: 1.6rem; margin-bottom: 5px; color: var(--primary-blue); }
        .motto { color: var(--accent-gold); font-style: italic; font-weight: 500; }

        /* Navigation (exactly as main site) */
        .navbar {
            background-color: var(--primary-blue);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .navbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .nav-menu {
            display: flex;
            list-style: none;
        }
        .nav-menu > li > a {
            color: var(--white);
            padding: 16px 18px;
            display: block;
            font-weight: 500;
            text-transform: uppercase;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .nav-menu > li > a:hover, .nav-menu > li > a.active {
            background-color: rgba(255,215,0,0.1);
            color: var(--accent-gold);
        }
        .dropdown { position: relative; }
        .dropdown-menu {
            position: absolute;
            top: 100%;
            left: 0;
            background: var(--white);
            min-width: 220px;
            box-shadow: var(--shadow);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            z-index: 1000;
            border-top: 3px solid var(--accent-gold);
            list-style: none;
        }
        .dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .dropdown-menu li { border-bottom: 1px solid #eee; }
        .dropdown-menu a {
            color: var(--dark-gray);
            padding: 12px 20px;
            display: block;
            transition: var(--transition);
        }
        .dropdown-menu a:hover { background: var(--light-gray); color: var(--primary-blue); padding-left: 25px; }

        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 10px;
        }
        .hamburger span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--white);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* ========== CLUB PAGE LAYOUTS (Separate pages style) ========== */
        .club-page {
            display: none;
            animation: fadeIn 0.4s ease;
        }
        .club-page.active-page {
            display: block;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px);}
            to { opacity: 1; transform: translateY(0);}
        }

        /* Club Hero Section with subject-specific gradient */
        .club-hero {
            padding: 20px 0;
            background: linear-gradient(135deg, var(--primary-blue), #004d3d);
            color: white;
            text-align: center;
            margin-bottom: 30px;
        }
        .club-hero h1 { font-size: 3rem; color: white; margin-bottom: 15px; }
        .club-hero h1 i { margin-right: 15px; }
        .club-hero p { font-size: 1.2rem; max-width: 700px; margin: 0 auto; opacity: 0.9; }

        /* Club Sticky Navigation */
        .club-nav {
            background: var(--white);
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            position: sticky;
            top: 76px;
            z-index: 99;
            border-bottom: 1px solid #e9ecef;
        }
        .club-nav .nav-club-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            list-style: none;
            gap: 5px;
            padding: 0;
            margin: 0;
        }
        .club-nav .nav-club-links li a {
            display: inline-block;
            padding: 15px 20px;
            font-weight: 500;
            color: var(--dark-gray);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .club-nav .nav-club-links li a:hover,
        .club-nav .nav-club-links li a.active-club-nav {
            color: var(--primary-blue);
            border-bottom: 3px solid var(--accent-gold);
        }

        /* Club Section Cards (reusing main site card style) */
        .club-section-card {
            background: var(--white);
            border-radius: 15px;
            padding: 35px;
            margin-bottom: 40px;
            box-shadow: var(--shadow);
            border: 1px solid #e1e5e9;
            transition: var(--transition);
        }
        .club-section-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(0,0,0,0.08); }
        .section-icon {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 15px;
        }
        .member-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 25px;
            margin-top: 20px;
        }
        .member-item {
            background: var(--light-gray);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
            transition: var(--transition);
        }
        .member-item i { font-size: 2.8rem; color: var(--primary-blue); margin-bottom: 12px; }
        .member-item h5 { margin-bottom: 5px; color: var(--dark-gray); }
        .leadership-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
            justify-content: space-between;
        }
        .leader-card {
            flex: 1;
            min-width: 200px;
            background: var(--light-gray);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
        }
        .timetable-table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            border-radius: 12px;
            overflow: hidden;
        }
        .timetable-table th {
            background: var(--primary-blue);
            color: white;
            padding: 12px;
            font-weight: 500;
        }
        .timetable-table td {
            padding: 12px;
            border-bottom: 1px solid #e9ecef;
        }
        .news-block {
            background: var(--light-gray);
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 20px;
            border-left: 5px solid var(--accent-gold);
        }
        .news-date {
            font-size: 0.8rem;
            color: var(--medium-gray);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-club-link {
            background: var(--primary-blue);
            color: white;
            border: none;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition);
        }

        /* Footer (same as main) */
        .main-footer {
            background-color: var(--primary-blue);
            color: var(--white);
            padding: 50px 0 20px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-column h3 { color: var(--accent-gold); margin-bottom: 20px; font-size: 1.2rem; }
        .footer-bottom { text-align: center; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 20px; }

        /* Back to Top */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--primary-blue);
            color: white;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--shadow);
            transition: var(--transition);
            z-index: 999;
        }
        .back-to-top:hover { background: var(--accent-gold); transform: translateY(-3px); }

        @media (max-width: 768px) {
            .hamburger { display: block; }
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 75%;
                height: 100vh;
                background: var(--primary-blue);
                flex-direction: column;
                padding-top: 80px;
                transition: 0.3s;
                z-index: 1000;
            }
            .nav-menu.active { right: 0; }
            .dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                background: rgba(0,0,0,0.1);
                border: none;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s;
            }
            .dropdown.active .dropdown-menu { max-height: 300px; }
            .club-hero h1 { font-size: 2rem; }
            .club-nav { top: 60px; }
            .club-nav .nav-club-links li a { padding: 12px 14px; font-size: 0.8rem; }
            .member-grid { grid-template-columns: 1fr 1fr; }
        }