:root {
            --primary: #284469;
            --primary-light: #1e3554;
            --accent: #FEC763;
            --success: #27ae60;
            --danger: #e74c3c;
            --text-dark: #2c3e50;
            --text-muted: #7f8c8d;
            --bg-body: #f4f7fa;
            --card-bg: #ffffff;
            --border-color: #dee2e6;
        }

        * { box-sizing: border-box; }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0; padding: 0;
            background-color: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.6;
            /* Proteksi Copy */
            user-select: none;
            -webkit-user-select: none;
            -moz-user-select: none;
            -ms-user-select: none;
        }
        /* --- NAVBAR --- */
        nav {
            background: var(--primary); 
            color: white; 
            padding: 15px 5%;
            display: flex; 
            justify-content: space-between; 
            align-items: center;
            position: sticky; 
            top: 0; 
            z-index: 1000; 
            box-shadow: 0 4px 20px rgba(0, 33, 71, 0.3);
            flex-wrap: wrap; /* Responsive wrap */
        }
        .nav-brand { display: flex; align-items: center; gap: 15px; }
        .nav-logo { height: 50px; width: 50px; object-fit: contain; background: white; border-radius: 50%; padding: 4px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
        .nav-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
        .brand-name { font-size: 1.4rem; letter-spacing: 0.5px; font-weight: 800; }
        .brand-sub { opacity: 0.8; font-size: 0.8rem; font-weight: 400; }
        
        .nav-links { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 10px; }
        .nav-links a { color: white; text-decoration: none; font-weight: 500; font-size: 0.95rem; transition: 0.3s; opacity: 0.85; display: flex; align-items: center; gap: 5px; }
        .nav-links a:hover { color: var(--accent); opacity: 1; transform: translateY(-2px); }
       
        .container { max-width: 1000px; margin: 30px auto; padding: 0 20px; }

        /* Header & Badges */
        .header-card {
            background: var(--card-bg); padding: 25px; border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.05); margin-bottom: 25px;
            border-bottom: 4px solid var(--accent);
        }

        .exam-info { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
        .user-meta { display: flex; align-items: center; gap: 15px; }
        .status-badge { padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 800; text-transform: uppercase; letter-spacing: 1px; }

        /* Passage Section */
        .passage-card { background: var(--card-bg); padding: 35px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); margin-bottom: 25px; }
        .passage-title { font-size: 1.5rem; color: var(--primary); margin-bottom: 20px; border-left: 5px solid var(--accent); padding-left: 15px; }
        .reading-text { font-size: 1.15rem; text-align: justify; white-space: pre-wrap; }

        /* Task Table */
        .task-card { background: var(--card-bg); padding: 30px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
        .it-table { width: 100%; border-collapse: collapse; margin-top: 20px; }
        .it-table th { background: #f8f9fa; text-align: left; padding: 15px; color: var(--primary); border-bottom: 2px solid var(--border-color); }
        .it-table td { padding: 15px; border-bottom: 1px solid var(--border-color); }
        .it-table input { width: 100%; padding: 10px; border: 1px solid var(--border-color); border-radius: 6px; font-size: 1rem; outline: none; }
        .it-table input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.1); }

        /* Results & Buttons */
        .score-box { display: none; background: #e8f5e9; color: #2e7d32; padding: 25px; border-radius: 12px; text-align: center; margin-bottom: 25px; border: 1px solid #c8e6c9; }
        .score-val { font-size: 2.8rem; font-weight: 900; display: block; }
        .btn-group { display: flex; justify-content: flex-end; gap: 15px; margin-top: 25px; }
        .btn { padding: 12px 28px; border-radius: 8px; font-weight: 700; cursor: pointer; border: none; display: flex; align-items: center; gap: 10px; transition: 0.3s; }
        .btn-submit { background: var(--primary); color: white; }
        .btn-pdf { background: var(--success); color: white; display: none; }

        /* Footer */
        footer { background: var(--primary); color: rgba(255,255,255,0.7); text-align: center; padding: 40px 20px; margin-top: 50px; }
        .footer-logo { color: white; font-size: 1.5rem; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; justify-content: center; gap: 10px; }

        /* =======================================================
                   🚀 NECTAR LMS: SPLIT-SCREEN READING LAYOUT
                   ======================================================= */
                .passage-block {
                    display: grid;
                    grid-template-columns: 1fr 1fr; /* 2 Kolom untuk Desktop (50% Teks, 50% Soal) */
                    gap: 30px;
                    margin-bottom: 50px;
                    align-items: start;
                }
                
                .passage-pane {
                    background: white;
                    padding: 35px;
                    border-radius: 12px;
                    box-shadow: 0 4px 15px rgba(0,0,0,0.04);
                    border: 1px solid #e2e8f0;
                    position: sticky; /* Kunci teks agar tidak hilang saat scroll soal */
                    top: 90px; 
                    max-height: calc(100vh - 120px);
                    overflow-y: auto; /* Bisa scroll teks di dalam kotaknya sendiri */
                }
                
                .questions-pane {
                    display: flex;
                    flex-direction: column;
                    gap: 20px; /* Jarak antar kartu soal */
                }
                
                /* =======================================================
                   📱 MOBILE ADJUSTMENTS (HP & TABLET)
                   ======================================================= */
                @media (max-width: 992px) {
                    .passage-block {
                        grid-template-columns: 1fr; /* Berubah jadi 1 Kolom (Atas-Bawah) */
                    }
                    .passage-pane {
                        position: relative; /* Matikan sticky di HP agar soal di bawah bisa diakses */
                        top: 0;
                        max-height: 45vh; /* Batasi tinggi teks maksimal setengah layar HP */
                    }
                }
        
                /* Mobile */
                @media (max-width: 768px) {
                    .navbar { padding: 1rem 15px; }
                    .passage-pane {
                        padding: 20px; /
                    }
                    .q-card {
                        padding: 15px !important; 
                    }
                    .student-answer-input {
                        font-size: 16px !important; 
                    }
                }