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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f8f9fa;
    min-height: 100vh;
    color: #212529;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

/* 사이드바 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 200px;
    height: 100vh;
    background: #ffffff;
    border-right: 1px solid #e9ecef;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px 15px;
    border-bottom: 1px solid #e9ecef;
    background: #212529;
    color: #ffffff;
}

.sidebar-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
}

.sidebar-nav {
    padding: 15px 0;
    flex: 1;
}

.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    color: #495057;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    font-size: 13px;
    font-weight: 500;
}

.sidebar-btn:hover {
    background: #f8f9fa;
    color: #212529;
    transform: translateX(4px);
}

.sidebar-btn.active {
    background: #212529;
    color: #ffffff;
    transform: translateX(4px);
}

.sidebar-btn.active:hover {
    background: #000000;
}

.sidebar-btn .icon {
    font-size: 18px;
    width: 20px;
    text-align: center;
}

.sidebar-btn .text {
    flex: 1;
}

/* 메인 콘텐츠 */
.main-content {
    margin-left: 200px;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* 헤더 */
.header {
    text-align: center;
    margin-bottom: 20px;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.header h1 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #212529;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.timer {
    font-size: 2.5rem;
    font-weight: 300;
    color: #212529;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    letter-spacing: 0.05em;
}

/* 타이머 컨트롤 */
.timer-controls {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

/* 버튼 스타일 */
.btn {
    padding: 8px 16px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    background: #ffffff;
    color: #212529;
}

.btn-primary {
    background: #212529;
    color: #ffffff;
    border-color: #212529;
}

.btn-primary:hover:not(:disabled) {
    background: #000000;
    border-color: #000000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: #6c757d;
    color: #ffffff;
    border-color: #6c757d;
}

.btn-secondary:hover:not(:disabled) {
    background: #5a6268;
    border-color: #5a6268;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-danger {
    background: #dc3545;
    color: #ffffff;
    border-color: #dc3545;
}

.btn-danger:hover:not(:disabled) {
    background: #c82333;
    border-color: #c82333;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background: transparent;
    color: #212529;
    border: 1px solid #dee2e6;
}

.btn-outline:hover {
    background: #212529;
    color: #ffffff;
    border-color: #212529;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    background: #f8f9fa;
    color: #6c757d;
    border-color: #dee2e6;
}

/* 증례 선택 */
.case-selection {
    background: #ffffff;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

/* 시험 기록 */
.session-notes {
    background: #ffffff;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #212529;
    letter-spacing: -0.01em;
}

.select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 13px;
    background: #ffffff;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.notes-textarea {
    width: 100%;
    min-height: 120px;
    padding: 10px 12px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 12px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.4;
    resize: vertical;
    background: #ffffff;
    transition: border-color 0.2s ease;
}

.notes-textarea:focus {
    outline: none;
    border-color: #212529;
    box-shadow: 0 0 0 3px rgba(33, 37, 41, 0.1);
}

.notes-textarea::placeholder {
    color: #6c757d;
    font-size: 11px;
    line-height: 1.4;
}

.select:focus {
    outline: none;
    border-color: #212529;
    box-shadow: 0 0 0 3px rgba(33, 37, 41, 0.1);
}

/* 체크리스트 섹션 */
.checklist-section {
    background: #ffffff;
    padding: 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.checklist-section h2 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: #212529;
    border-bottom: 2px solid #212529;
    padding-bottom: 8px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.checklist-section h3 {
    font-size: 0.9rem;
    margin-bottom: 12px;
    color: #495057;
    font-weight: 600;
}

/* 체크리스트 그리드 */
.checklist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 8px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.checklist-item:hover {
    background: #f8f9fa;
    border-color: #212529;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.checklist-item.checked {
    background: #212529;
    border-color: #212529;
    color: #ffffff;
}

.checklist-item input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: #212529;
}

.checklist-item span {
    font-weight: 500;
    font-size: 12px;
    letter-spacing: 0.01em;
}

/* 문진 체크리스트 (한 줄에 하나씩) */
.interview-checklist {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.interview-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: #ffffff;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.interview-item:hover {
    background: #f8f9fa;
    border-color: #212529;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.interview-item.checked {
    background: #212529;
    border-color: #212529;
    color: #ffffff;
}

.interview-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #212529;
}

.interview-item span {
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.01em;
}

/* 감별진단 및 Plan */
.ddx-list, .plan-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ddx-item, .plan-item {
    padding: 10px 14px;
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-weight: 500;
    color: #495057;
    font-size: 12px;
    letter-spacing: 0.01em;
}

/* 네비게이션 제거됨 - 사이드바로 대체 */

/* 반응형 디자인 */
@media (max-width: 768px) {
    .sidebar {
        width: 180px;
    }
    
    .main-content {
        margin-left: 180px;
    }
    
    .sidebar-header h2 {
        font-size: 1.1rem;
    }
    
    .sidebar-btn {
        padding: 10px 16px;
        font-size: 12px;
    }
    
    .container {
        padding: 10px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
    
    .timer {
        font-size: 2rem;
    }
    
    .timer-controls {
        flex-wrap: wrap;
    }
    
    .checklist-grid {
        grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
        gap: 8px;
    }
    
    .checklist-item {
        padding: 8px 10px;
    }
    
    .checklist-item span {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 50px;
    }
    
    .main-content {
        margin-left: 50px;
    }
    
    .sidebar-header {
        padding: 15px 8px;
    }
    
    .sidebar-header h2 {
        font-size: 0.9rem;
        text-align: center;
    }
    
    .sidebar-btn {
        padding: 12px 8px;
        justify-content: center;
    }
    
    .sidebar-btn .text {
        display: none;
    }
    
    .sidebar-btn .icon {
        font-size: 18px;
    }
}

/* 애니메이션 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.checklist-section {
    animation: fadeIn 0.5s ease-out;
}

/* 완료 상태 */
.timer.completed {
    color: #212529;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

/* 모달 스타일 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal-content {
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px 20px 0 20px;
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 20px;
}

.modal-header h3 {
    margin: 0 0 15px 0;
    font-size: 1.2rem;
    color: #212529;
    font-weight: 600;
}

.modal-body {
    padding: 0 20px;
}

.modal-body p {
    margin: 0 0 20px 0;
    color: #495057;
    font-size: 0.9rem;
    line-height: 1.4;
}

.score-input-group {
    margin-bottom: 20px;
}

.score-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: #212529;
}

.score-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    font-size: 13px;
    margin-bottom: 15px;
    text-align: center;
    font-weight: 600;
    color: #212529;
}

.score-input:focus {
    outline: none;
    border-color: #212529;
    box-shadow: 0 0 0 3px rgba(33, 37, 41, 0.1);
}

.score-slider-container {
    position: relative;
    margin-bottom: 10px;
}

.score-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: #dee2e6;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.score-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #212529;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.score-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #212529;
    cursor: pointer;
    border: 2px solid #ffffff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.score-display {
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: #212529;
    margin-top: 10px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid #e9ecef;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.modal-footer .btn {
    padding: 8px 16px;
    font-size: 13px;
}

/* 버튼 로딩 상태 및 스피너 */
.spinner {
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn.is-loading {
    position: relative;
    pointer-events: none;
}

.btn.is-loading .spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    vertical-align: middle;
    margin-right: 6px;
}

/* OSCE 탭 및 콘텐츠 */
.osce-tabs {
    display: flex;
    margin-bottom: 20px;
    background: #ffffff;
    border-radius: 8px;
    padding: 6px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.osce-tab-button {
    flex: 1;
    padding: 12px 18px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.2s ease;
    color: #6c757d;
}

.osce-tab-button.active {
    background: #212529;
    color: #ffffff;
}

.osce-tab-button:hover:not(.active) {
    background: transparent;
    color: #6c757d;
}

.osce-content {
    display: block;
}

.osce-step-card {
    background: #ffffff;
    padding: 10px;
    border-radius: 6px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    border: 1px solid #e9ecef;
    margin-bottom: 8px;
}

.osce-step-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 6px;
}

.osce-step-order {
    min-width: 22px;
    height: 22px;
    border-radius: 11px;
    background: #212529;
    color: #ffffff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 11px;
}

.osce-step-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #212529;
}

.osce-item-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.osce-item {
    border: 1px solid #dee2e6;
    border-radius: 4px;
    background: #ffffff;
    transition: all 0.2s ease;
    font-size: 12px;
}

.osce-item:hover {
    background: #f8f9fa;
    border-color: #212529;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.osce-item.checked {
    background: #212529;
    border-color: #212529;
    color: #ffffff;
}

.osce-item-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    cursor: pointer;
}

.osce-item-label span {
    font-size: 12px;
}

.osce-item-input {
    width: 14px;
    height: 14px;
    accent-color: #212529;
}

.osce-empty {
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    text-align: center;
    color: #6c757d;
}

@media (max-width: 480px) {
    .osce-tab-button {
        font-size: 12px;
        padding: 8px 10px;
    }
}

/* OSCE 좌/우 분할 레이아웃 */
.osce-split {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 16px;
}

.osce-left, .osce-right {
    min-width: 0;
}

.osce-panel {
    background: #ffffff;
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

@media (max-width: 992px) {
    .osce-split {
        grid-template-columns: 1fr;
    }
}

/* OSCE 좌측 미디어 패널 */
.osce-media-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.osce-media {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #f1f3f5;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.osce-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.osce-exam-note {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    border-radius: 6px;
    padding: 12px;
}

.osce-exam-title {
    margin: 0 0 6px 0;
    font-size: 0.95rem;
    color: #212529;
    font-weight: 600;
}

.osce-exam-text {
    margin: 0;
    font-size: 0.9rem;
    color: #495057;
    line-height: 1.5;
}