/**
 * AI 면접 도구 - 모던 디자인 시스템
 * 깔끔하고 전문적인 UI
 */

/* ========================================
   색상 시스템
   ======================================== */
:root {
    /* Primary Colors */
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;

    /* Neutral Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;

    /* Text Colors */
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;

    /* Border Colors */
    --border-light: #E5E7EB;
    --border-medium: #D1D5DB;
    --border-dark: #9CA3AF;

    /* Status Colors */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* ========================================
   기본 스타일
   ======================================== */
body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--bg-secondary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   컨테이너
   ======================================== */
.modern-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
}

.modern-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    border: 1px solid var(--border-light);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.modern-card:hover {
    box-shadow: var(--shadow-lg);
}

.modern-card-compact {
    padding: var(--space-lg);
}

/* ========================================
   타이포그래피
   ======================================== */
.modern-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
    letter-spacing: -0.02em;
}

.modern-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
}

.modern-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 var(--space-md) 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.modern-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.modern-text {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.modern-text-small {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ========================================
   폼 요소
   ======================================== */
.modern-input,
.modern-select,
.modern-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.modern-input:hover,
.modern-select:hover,
.modern-textarea:hover {
    border-color: var(--border-medium);
}

.modern-input:focus,
.modern-select:focus,
.modern-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.modern-input::placeholder {
    color: var(--text-tertiary);
}

.modern-textarea {
    min-height: 120px;
    resize: vertical;
}

.modern-form-group {
    margin-bottom: var(--space-lg);
}

.modern-form-hint {
    margin-top: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ========================================
   버튼
   ======================================== */
.modern-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    font-family: var(--font-sans);
}

.modern-btn-primary {
    background: var(--primary);
    color: white;
}

.modern-btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.modern-btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modern-btn-secondary:hover:not(:disabled) {
    background: var(--border-light);
}

.modern-btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

.modern-btn-outline:hover:not(:disabled) {
    background: var(--primary-light);
}

.modern-btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.modern-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.modern-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.modern-btn-block {
    width: 100%;
}

/* ========================================
   배지 & 태그
   ======================================== */
.modern-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: 9999px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.modern-badge-primary {
    background: var(--primary-light);
    color: var(--primary);
}

.modern-badge-success {
    background: #ECFDF5;
    color: var(--success);
}

.modern-badge-warning {
    background: #FFFBEB;
    color: var(--warning);
}

.modern-badge-error {
    background: #FEF2F2;
    color: var(--error);
}

/* ========================================
   체크박스 & 라디오
   ======================================== */
.modern-checkbox,
.modern-radio {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: background 0.2s ease;
}

.modern-checkbox:hover,
.modern-radio:hover {
    background: var(--bg-tertiary);
}

.modern-checkbox input[type="checkbox"],
.modern-radio input[type="radio"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--primary);
}

.modern-checkbox-label,
.modern-radio-label {
    font-size: 0.9375rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ========================================
   그리드
   ======================================== */
.modern-grid {
    display: grid;
    gap: var(--space-lg);
}

.modern-grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.modern-grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.modern-grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ========================================
   알림 & 메시지
   ======================================== */
.modern-alert {
    padding: var(--space-md);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    font-size: 0.9375rem;
}

.modern-alert-info {
    background: #EFF6FF;
    border-color: var(--info);
    color: #1E40AF;
}

.modern-alert-success {
    background: #ECFDF5;
    border-color: var(--success);
    color: #065F46;
}

.modern-alert-warning {
    background: #FFFBEB;
    border-color: var(--warning);
    color: #92400E;
}

.modern-alert-error {
    background: #FEF2F2;
    border-color: var(--error);
    color: #991B1B;
}

/* ========================================
   로딩 & 스피너
   ======================================== */
.modern-spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.modern-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* ========================================
   반응형
   ======================================== */
@media (max-width: 768px) {
    .modern-container {
        padding: var(--space-md);
    }

    .modern-card {
        padding: var(--space-lg);
        border-radius: var(--radius-lg);
    }

    .modern-title {
        font-size: 1.5rem;
    }

    .modern-subtitle {
        font-size: 1.25rem;
    }

    .modern-grid-2,
    .modern-grid-3,
    .modern-grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   애니메이션
   ======================================== */
.modern-fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modern-slide-up {
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   유틸리티
   ======================================== */
.modern-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-xl) 0;
}

.modern-flex {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.modern-flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modern-flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modern-text-center {
    text-align: center;
}

.modern-hidden {
    display: none !important;
}

.modern-mb-0 { margin-bottom: 0; }
.modern-mb-sm { margin-bottom: var(--space-sm); }
.modern-mb-md { margin-bottom: var(--space-md); }
.modern-mb-lg { margin-bottom: var(--space-lg); }
.modern-mb-xl { margin-bottom: var(--space-xl); }

.modern-mt-0 { margin-top: 0; }
.modern-mt-sm { margin-top: var(--space-sm); }
.modern-mt-md { margin-top: var(--space-md); }
.modern-mt-lg { margin-top: var(--space-lg); }
.modern-mt-xl { margin-top: var(--space-xl); }