:root {
            --primary: #284469;
            --primary-dark: #1e3554;
            --accent: #FEC763;
            --secondary: #f5b13f;
            --success: #27ae60;
            --bg: #f0f2f5;
            --white: #ffffff;
            --text: #2c3e50;
            --text-muted: #7f8c8d;
            --border: #e1e8ed;
        }

        * { margin:0; padding:0; box-sizing:border-box; font-family: 'Montserrat', system-ui, sans-serif; }

        body { background: var(--bg); color: var(--text); line-height: 1.6; padding-top: 85px; }

        /* NAVBAR MOBILE RESPONSIVE & HAMBURGER */
        nav {
            background-color: var(--primary);
            backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
            color: var(--white); padding: 0 5%; height: 75px;
            display: flex; justify-content: space-between; align-items: center;
            position: fixed; width: 100%; top: 0; z-index: 1000;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .nav-brand { display: flex; align-items: center; gap: 12px; }
        .nav-logo { height: 48px; width: 48px; object-fit: contain; background: var(--white); border-radius: 50%; padding: 4px; border: 1.5px solid var(--accent); }
        .brand-text h1 { font-size: 1.2rem; letter-spacing: 0.5px; color: var(--white); font-weight: 700; }
        .brand-text p { font-size: 0.68rem; opacity: 0.9; color: var(--accent); font-weight: 600; margin: 0; }

        .nav-links { display: flex; list-style: none; gap: 20px; align-items: center; }
        .nav-links a { color: var(--white); text-decoration: none; font-weight: 500; font-size: 0.88rem; transition: 0.2s; }
        .nav-links a:hover { color: var(--accent); }
        .nav-btn { background: transparent; border: 1px solid var(--accent) !important; color: var(--accent) !important; padding: 6px 14px; border-radius: 4px; font-weight: 600; }
        .nav-btn:hover { background: var(--accent); color: var(--primary) !important; }

        /* HAMBURGER STYLING */
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 5px; }
        .hamburger span { width: 25px; height: 2.5px; background: white; border-radius: 2px; transition: 0.3s; }

        .timer-banner { background: var(--primary); color: var(--white); text-align: center; padding: 12px; font-size: 0.9rem; font-weight: 700; position: sticky; top: 75px; z-index: 999; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }

        .container { max-width: 950px; margin: 0 auto; padding: 15px; }

        .hero-info-card { background: linear-gradient(135deg, var(--primary) 0%, #111e31 100%); color: var(--white); border-radius: 16px; padding: 25px 20px; margin-bottom: 20px; box-shadow: 0 10px 25px rgba(40,68,105,0.15); border-left: 6px solid var(--accent); }
        .hero-info-card h2 { color: var(--accent); font-size: 1.4rem; margin-bottom: 12px; font-weight: 700; }
        .hero-info-text { font-size: 0.95rem; opacity: 0.95; text-align: justify; margin-bottom: 15px; line-height: 1.6; }
        .highlight-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin-top: 15px; }
        .info-pill { background: rgba(255, 255, 255, 0.08); padding: 12px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.1); font-size: 0.82rem; }

        .card { background: var(--white); padding: 20px 15px; border-radius: 14px; box-shadow: 0 4px 15px rgba(0,0,0,0.04); border: 1px solid var(--border); margin-bottom: 20px; }
        .hero-img { width: 100%; height: auto; max-height: 380px; object-fit: contain; background: #000; border-bottom: 4px solid var(--accent); border-radius: 10px; margin-bottom: 15px; }
        .content-body { padding: 10px 5px; }
        .content-body h1 { color: var(--primary); font-size: 1.6rem; margin-bottom: 8px; font-weight: 800; line-height: 1.3; }
        .meta-info { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; color: var(--text-muted); font-size: 0.78rem; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
        .material-text { font-size: 1rem; line-height: 1.8; color: #334155; margin-bottom: 30px; text-align: justify; overflow-x: auto; }
        .material-text img { max-width: 100% !important; height: auto !important; border-radius: 8px; }

        .form-section { background: #f8f9fa; padding: 20px 15px; border-radius: 14px; border: 1px solid var(--border); }
        .form-section h3 { color: var(--primary); font-size: 1.2rem; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
        .form-grid { display: grid; grid-template-columns: 1fr; gap: 15px; margin-bottom: 15px; }

        label { display: block; font-weight: 700; margin-bottom: 6px; color: var(--text); font-size: 0.85rem; }
        input, select, textarea { width: 100%; padding: 12px; border: 2px solid #cbd5e1; border-radius: 10px; font-size: 0.95rem; transition: 0.2s; background: var(--white); }
        input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(40,68,105,0.1); }

        .btn-submit { background: var(--primary); color: var(--white); border: none; padding: 15px; font-size: 1rem; font-weight: 700; border-radius: 10px; cursor: pointer; width: 100%; transition: 0.2s; margin-top: 10px; box-shadow: 0 4px 15px rgba(40,68,105,0.2); }
        .btn-submit:hover { background: var(--primary-dark); }

        .quiz-item-box { background: #fff; border: 1px solid #cbd5e1; padding: 15px; border-radius: 10px; margin-bottom: 15px; }
        .quiz-item-box p { font-size: 0.95rem; }

        /* RESPONSIVE BREAKPOINT TABLET / PC (Min 768px) */
        @media (min-width: 768px) {
            .container { padding: 20px; }
            .card { padding: 30px; }
            .content-body { padding: 20px; }
            .content-body h1 { font-size: 2.1rem; }
            .hero-info-card { padding: 35px; }
            .form-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .form-section { padding: 30px; }
        }

        /* BREAKPOINT MOBILE NAVBAR TOGGLE */
        @media (max-width: 900px) {
            .hamburger { display: flex; }
            .nav-links {
                display: none; flex-direction: column; position: absolute; top: 75px; left: 0;
                width: 100%; background: var(--primary); padding: 20px 0; border-bottom: 3px solid var(--accent); gap: 0;
                box-shadow: 0 10px 20px rgba(0,0,0,0.15);
            }
            .nav-links.active { display: flex; }
            .nav-links a { display: block; padding: 12px 25px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.06); width: 100%; }
            .nav-btn { margin: 10px 25px; width: calc(100% - 50px); text-align: center; }
            .brand-text p { display: block; }
        }