* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Tahoma, sans-serif; background: #f4f6f9; color: #333; line-height: 1.6; }
a { color: #1a73e8; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1000px; margin: 30px auto; padding: 20px; }
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.header h1 { font-size: 1.6rem; }

.login-container {
    max-width: 400px; margin: 80px auto; padding: 30px;
    background: #fff; border-radius: 10px; box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    text-align: center;
}
.login-container h1 { color: #1a73e8; margin-bottom: 5px; }
.login-container h2 { font-size: 1.1rem; color: #666; margin-bottom: 20px; font-weight: 400; }
.login-container input {
    width: 100%; padding: 12px; margin-bottom: 12px;
    border: 1px solid #ddd; border-radius: 6px; font-size: 1rem;
}
.login-container button { width: 100%; padding: 12px; border: none; background: #1a73e8; color: #fff;
    border-radius: 6px; font-size: 1rem; cursor: pointer; }
.login-container button:hover { background: #1557b0; }

.card { background: #fff; padding: 20px; border-radius: 10px; margin-bottom: 20px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.card h2 { margin-bottom: 15px; font-size: 1.2rem; }

.btn { display: inline-block; padding: 10px 18px; border-radius: 6px; border: none; cursor: pointer; font-size: 0.95rem; }
.btn-primary { background: #1a73e8; color: #fff; }
.btn-primary:hover { background: #1557b0; text-decoration: none; color: #fff; }
.btn-danger { background: #e53935; color: #fff; }
.btn-danger:hover { background: #c62828; text-decoration: none; color: #fff; }
.btn-submit { padding: 15px 40px; font-size: 1.1rem; margin: 20px auto; display: block; }

.error { color: #e53935; background: #ffebee; padding: 10px; border-radius: 6px; margin-bottom: 15px; }
.success { color: #2e7d32; background: #e8f5e9; padding: 10px; border-radius: 6px; margin-bottom: 15px; }
.warning { color: #ef6c00; background: #fff3e0; padding: 10px; border-radius: 6px; margin-bottom: 15px; }
.info { color: #0277bd; background: #e1f5fe; padding: 10px; border-radius: 6px; margin-bottom: 15px; }

.exam-header {
    position: sticky; top: 0; background: #1a73e8; color: #fff;
    padding: 15px 30px; display: flex; justify-content: space-between; z-index: 100;
}
.timer { font-weight: bold; font-size: 1.1rem; background: rgba(255,255,255,0.15); padding: 5px 15px; border-radius: 20px; }

.soal-card { background: #fff; padding: 20px; border-radius: 10px; margin-bottom: 15px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.kategori-badge { display: inline-block; background: #1a73e8; color: #fff; padding: 3px 10px;
    border-radius: 20px; font-size: 0.75rem; margin-bottom: 10px; }
.pertanyaan { margin-bottom: 12px; }
.opsi { display: flex; align-items: flex-start; padding: 10px; margin-bottom: 6px;
    border: 1px solid #eee; border-radius: 6px; cursor: pointer; }
.opsi:hover { background: #f9f9f9; }
.opsi input { margin-right: 10px; margin-top: 4px; }

.score-table { width: 100%; border-collapse: collapse; }
.score-table td { padding: 12px; border-bottom: 1px solid #eee; }
.total-row { background: #e8f5e9; font-size: 1.1rem; }
.review-card { padding: 15px; border: 1px solid #eee; border-radius: 8px; margin-bottom: 12px; }

.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #2c3e50; color: #ecf0f1; padding: 20px 0; }
.sidebar h3 { padding: 0 20px 15px; border-bottom: 1px solid #34495e; margin-bottom: 10px; }
.sidebar a { display: block; padding: 12px 20px; color: #ecf0f1; }
.sidebar a:hover, .sidebar a.active { background: #1a73e8; text-decoration: none; }
.main-content { flex: 1; padding: 30px; }
.main-content h1 { margin-bottom: 20px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 15px; margin-bottom: 20px; }
.stat-card { background: #fff; padding: 20px; border-radius: 10px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.stat-card h3 { font-size: 2rem; color: #1a73e8; }
.stat-card p { color: #666; }

.data-table { width: 100%; background: #fff; border-collapse: collapse; border-radius: 10px; overflow: hidden; margin-top: 15px; }
.data-table th, .data-table td { padding: 12px; text-align: left; border-bottom: 1px solid #eee; }
.data-table th { background: #f4f6f9; font-weight: 600; }

pre { background: #f4f6f9; padding: 15px; border-radius: 6px; overflow-x: auto; font-size: 0.85rem; margin: 10px 0; }