/* 마스터 문제 스타일시트 */
:root {
    --primary-color: #6C63FF; /* 마스터 퍼플 */
    --primary-light: #F0EEFF; /* 연한 퍼플 배경 */
    --secondary-color: #4CAF50; /* 초록색 강조 */
    --success-color: #4CAF50; /* 초록색 */
    --warning-color: #FFC107; /* 노란색 */
    --error-color: #F44336; /* 빨간색 */
    --text-color: #333; /* 기본 텍스트 색상 */
    --light-text: #757575; /* 밝은 텍스트 색상 */
    --border-radius: 12px;
    --box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f8faff;
    margin: 0;
    padding: 0;
    padding-bottom: 80px; /* 푸터와 간격을 위한 여백 추가 */
}

.problem-container {
    max-width: 1000px;
    margin: 0 auto 40px;
    padding: 20px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* 문제 헤더 스타일 */
.problem-header {
    margin-bottom: 25px;
    border-bottom: 1px solid #e0e0f0;
    padding-bottom: 20px;
    position: relative;
}

.problem-info {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
}

.info-tag {
    background-color: var(--primary-light);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9em;
    display: inline-flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.info-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.info-tag i {
    margin-right: 8px;
    font-size: 1.1em;
}

/* 문제 설명 및 제약 조건 */
.problem-description {
    margin-bottom: 35px;
    line-height: 1.8;
    font-size: 1.05em;
}

.problem-description h2 {
    color: var(--primary-color);
    font-size: 1.8em;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.problem-description h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.constraints {
    background-color: var(--primary-light);
    padding: 20px 25px;
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    border-left: 5px solid var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.constraints h3 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.3em;
}

/* 문제 아이템 스타일 */
.question {
    background-color: white;
    padding: 25px;
    margin-bottom: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-top: 4px solid var(--primary-color);
}

.question h3 {
    color: var(--primary-color);
    margin-top: 0;
    padding-bottom: 10px;
    border-bottom: 1px solid #f0f0f0;
    font-size: 1.4em;
}

.question-text {
    font-size: 1.15em;
    margin-bottom: 20px;
    color: var(--text-color);
    font-weight: 500;
}

.question-instruction {
    font-weight: 500;
    margin-bottom: 20px;
    color: #555;
    font-size: 1.05em;
    background-color: var(--primary-light);
    padding: 10px 15px;
    border-radius: 8px;
    display: inline-block;
}

/* 옵션 스타일 */
.options-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option {
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid #e0e0f0;
    overflow: hidden;
    cursor: pointer;
    background-color: white;
    position: relative;
}

.option:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-color: var(--primary-color);
}

.option-label {
    display: block;
    padding: 15px 20px;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.option-input {
    margin-right: 10px;
    accent-color: var(--primary-color);
    width: 18px;
    height: 18px;
    vertical-align: middle;
}

.option-text {
    line-height: 1.7;
    display: inline-block;
    vertical-align: middle;
    margin-left: 5px;
}

.option.correct {
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid #4CAF50;
}

.option.incorrect {
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid #F44336;
}

/* 설명 스타일 */
.explanation {
    margin-top: 20px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: var(--border-radius);
    border-left: 5px solid #FFC107;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.explanation h4 {
    color: #333;
    margin-top: 0;
    margin-bottom: 10px;
    font-size: 1.1em;
}

/* 버튼 스타일 */
.submit-btn {
    display: block;
    margin: 35px auto;
    background-color: var(--primary-color);
    color: white;
    padding: 15px 35px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.15em;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.3);
}

.submit-btn:hover {
    background-color: #574ddb;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(108, 99, 255, 0.4);
}

.submit-btn i {
    margin-left: 8px;
}

/* 결과 섹션 스타일 */
.results-section {
    margin: 30px 0;
    background-color: #fff;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    animation: fadeIn 0.5s ease;
}

.results-section h2 {
    color: var(--primary-color);
    margin-top: 0;
    font-size: 1.8em;
    position: relative;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.results-section h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.result-item {
    margin-bottom: 15px;
    padding: 15px 20px;
    border-radius: var(--border-radius);
}

.result-item.pass {
    background-color: rgba(76, 175, 80, 0.1);
    border-left: 5px solid #4CAF50;
}

.result-item.fail {
    background-color: rgba(244, 67, 54, 0.1);
    border-left: 5px solid #F44336;
}

.retry-button {
    margin-top: 20px;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: bold;
}

.retry-button:hover {
    background-color: #574ddb;
    transform: translateY(-2px);
}

/* 힌트 섹션 스타일 */
.hints-section {
    margin-top: 40px;
    background-color: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.hints-section h2 {
    color: var(--primary-color);
    margin-top: 0;
    font-size: 1.8em;
    position: relative;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.hints-section h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.hint-item {
    background-color: #f0f7ff;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border-left: 5px solid #64b5f6;
    display: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    font-size: 1.05em;
    line-height: 1.7;
    animation: fadeIn 0.5s ease;
}

.show-hint-btn {
    display: block;
    width: 100%;
    padding: 12px 20px;
    margin-bottom: 15px;
    text-align: left;
    background-color: white;
    border: 1px solid #e0e0f0;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1.05em;
    font-weight: 500;
    color: var(--primary-color);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.show-hint-btn:hover {
    background-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.show-hint-btn i {
    float: right;
    margin-top: 3px;
}

/* 네비게이션 섹션 스타일 */
.navigation-section {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    padding-top: 25px;
    border-top: 1px solid #e0e0f0;
}

.action-btn {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: white;
    font-size: 0.95em;
    min-width: 120px;
    background-color: var(--primary-color);
}

.action-btn i {
    margin-right: 8px;
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
}

/* 애니메이션 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .info-tag {
        font-size: 0.8em;
        padding: 6px 12px;
    }
    
    .option-item {
        padding: 10px 15px;
    }
    
    .problem-container {
        padding: 15px;
    }
}