:root { --primary: #3b82f6; --success: #22c55e; --danger: #ef4444; --bg: #f3f4f6; --card: #ffffff; }
body { font-family: sans-serif; background: var(--bg); margin: 0; padding: 20px; color: #1f2937; }
.container { max-width: 900px; margin: 0 auto; }
.card { background: var(--card); padding: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); margin-bottom: 20px; }
.header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.btn { padding: 10px 15px; border-radius: 5px; text-decoration: none; color: white; border: none; cursor: pointer; font-size: 14px; }
.btn-primary { background: var(--primary); }
.btn-danger { background: var(--danger); }
.btn-secondary { background: #6b7280; }
input, select, textarea { width: 100%; padding: 10px; margin: 5px 0 15px; border: 1px solid #d1d5db; border-radius: 5px; box-sizing: border-box; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 10px; text-align: left; border-bottom: 1px solid #e5e7eb; }
.nav-dot { width: 30px; height: 30px; border-radius: 50%; background: #e5e7eb; display: flex; align-items: center; justify-content: center; cursor: pointer; }
.nav-dot.active { background: var(--primary); color: white; }
.nav-dot.answered { border: 2px solid var(--success); }
.timer { font-size: 1.5rem; font-weight: bold; color: var(--primary); }