* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 50%, #d299c2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 800px;
}

.survey-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 25px;
    padding: 50px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.survey-title {
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 50px;
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.survey-form {
    width: 100%;
}

.question-item {
    margin-bottom: 35px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.6) 100%);
    position: relative;
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.question-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1);
}

.question-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.question-text {
    font-size: 18px;
    color: #4a5568;
    font-weight: 600;
    line-height: 1.6;
    flex: 1;
    margin-right: 20px;
}

.required {
    color: #e74c3c;
}

.question-type {
    font-size: 12px;
    color: #667eea;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    padding: 6px 12px;
    border-radius: 15px;
    white-space: nowrap;
    font-weight: 500;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

/* 별점 평가 스타일 */
.rating-container {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
}

.star {
    font-size: 40px;
    color: #d1d5db;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    display: inline-block;
    line-height: 1;
    vertical-align: middle;
}

.star:hover,
.star.active {
    color: #ffd700;
    transform: scale(1.2);
    filter: drop-shadow(0 4px 8px rgba(255, 215, 0, 0.3));
}

.star:hover ~ .star {
    color: #d1d5db;
}

/* 텍스트 입력 스타일 */
.text-input {
    width: 100%;
    padding: 20px;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 15px;
    font-size: 16px;
    font-family: inherit;
    resize: vertical;
    min-height: 140px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}

.text-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: rgba(255, 255, 255, 0.95);
}

.text-input::placeholder {
    color: #a0aec0;
    font-style: italic;
}

/* 폼 액션 버튼들 */
.form-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 50px;
    padding-top: 40px;
    border-top: 1px solid rgba(102, 126, 234, 0.1);
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 18px 40px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 18px;
    font-weight: 700;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

.submit-btn:disabled {
    background: #a0aec0;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .survey-card {
        padding: 20px;
    }
    
    .survey-title {
        font-size: 24px;
    }
    
    .question-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .submit-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 로딩 애니메이션 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 성공 메시지 */
.success-message {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
    text-align: center;
    font-weight: 500;
}

/* 에러 메시지 */
.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #f5c6cb;
    text-align: center;
    font-weight: 500;
}

/* 완료 화면 */
.completion-screen {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 25px;
    padding: 60px 50px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.completion-content {
    max-width: 500px;
    margin: 0 auto;
}

.completion-icon {
    font-size: 80px;
    color: #28a745;
    margin-bottom: 30px;
    animation: bounceIn 0.8s ease-out;
}

.completion-title {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.completion-message {
    font-size: 18px;
    color: #5a6c7d;
    line-height: 1.6;
    margin-bottom: 40px;
}

.completion-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.retry-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.retry-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.retry-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
}


/* 애니메이션 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
    70% {
        transform: scale(0.9);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .completion-screen {
        padding: 40px 20px;
    }
    
    .completion-title {
        font-size: 24px;
    }
    
    .completion-message {
        font-size: 16px;
    }
    
    .completion-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .retry-btn {
        width: 100%;
        max-width: 250px;
    }
}