* { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: 'Malgun Gothic', 'Apple SD Gothic Neo', sans-serif; 
            background: #f5f5f5;
            padding: 20px;
        }
        .container {
            max-width: 600px;
            margin: 10 auto;
            background: white;
            padding: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        h1 {
            color: #333;
            margin-bottom: 30px;
            border-bottom: 3px solid #4CAF50;
            padding-bottom: 10px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: bold;
        }
        input[type="text"],
        input[type="email"],
        input[type="tel"],
        input[type="date"],
        input[type="time"],
        select,
        textarea {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 14px;
            font-family: 'Malgun Gothic', sans-serif;
        }
        textarea {
            resize: vertical;
            min-height: 100px;
        }
        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: #4CAF50;
        }
        .required { color: red; }
        
        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 30px;
        }
        .btn {
            flex: 1;
            padding: 12px 20px;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-decoration: none;
            text-align: center;
            transition: background 0.3s;
            display: inline-block;
        }
        .btn-primary {
            background-color: #4CAF50;
            color: white;
        }
        .btn-primary:hover { background-color: #45a049; }
        
        .btn-secondary {
            background-color: #999;
            color: white;
        }
        .btn-secondary:hover { background-color: #777; }
        
        .error {
            background: #f8d7da;
            color: #721c24;
            padding: 15px;
            border-radius: 4px;
            margin-bottom: 20px;
            border: 1px solid #f5c6cb;
        }
        
        /* 시간 선택 스타일 */
        .time-slots {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .time-period {
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 15px;
            background: #fafafa;
        }
        .period-label {
            font-size: 14px;
            font-weight: bold;
            color: #555;
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 2px solid #e0e0e0;
        }
        .time-buttons {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
            gap: 8px;
        }
        .time-btn {
            padding: 12px 8px;
            border: 2px solid #ddd;
            background: white;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
            color: #333;
        }
        .time-btn:hover {
            border-color: #4CAF50;
            background: #f1f8f4;
            transform: translateY(-2px);
            box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
        }
        .time-btn.selected {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-color: #667eea;
            font-weight: bold;
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
        }
        .time-btn:active {
            transform: translateY(0);
        }
        
        @media (max-width: 600px) {
            .time-buttons {
                grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
            }
            .time-btn {
                padding: 10px 5px;
                font-size: 13px;
            }
        }