* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, sans-serif; background: #f5f5f5; padding: 20px; }
.container { max-width: 800px; margin: 0 auto; background: white; padding: 30px; border-radius: 10px; box-shadow: 0 0 20px rgba(0,0,0,0.1); }
h1 { color: #333; margin-bottom: 30px; text-align: center; }
h3 { color: #666; margin: 20px 0 10px; }

input, select, textarea, button { width: 100%; padding: 12px; margin: 10px 0; border: 1px solid #ddd; border-radius: 5px; font-size: 16px; }
textarea { resize: vertical; min-height: 100px; }
button { background: #4CAF50; color: white; border: none; cursor: pointer; font-weight: bold; }
button:hover { background: #45a049; }
.btn.big { font-size: 18px; padding: 15px; }

.back { display: inline-block; margin-bottom: 20px; color: #666; text-decoration: none; }
.error { color: #f44336; background: #ffebee; padding: 15px; border-radius: 5px; margin: 20px 0; }
.success { color: #4CAF50; background: #e8f5e8; padding: 15px; border-radius: 5px; margin: 20px 0; }

.text-box { background: #f9f9f9; padding: 20px; border-left: 4px solid #4CAF50; margin: 20px 0; min-height: 200px; border-radius: 5px; }
.timer { background: #fff3cd; padding: 15px; border-radius: 5px; font-size: 18px; font-weight: bold; margin: 20px 0; }

table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th, td { padding: 12px; text-align: left; border-bottom: 1px solid #ddd; }
th { background: #f8f9fa; font-weight: bold; }
tr:hover { background: #f5f5f5; }
.completed { color: #4CAF50; }
.failed { color: #f44336; }

.session { border: 2px solid #4CAF50; padding: 20px; border-radius: 10px; margin: 20px 0; }
.menu { display: flex; gap: 20px; flex-wrap: wrap; margin: 30px 0; }
@media (max-width: 600px) { .menu { flex-direction: column; } }