/* ===== CSS 변수 ===== */
:root {
    --primary-blue: #3B82F6;
    --primary-green: #10B981;
    --primary-purple: #8B5CF6;
    --primary-orange: #F59E0B;
    --primary-red: #EF4444;
    --bg-color: #F9FAFB;
    --text-color: #1F2937;
    --border-color: #E5E7EB;
}

[data-theme="dark"] {
    --bg-color: #111827;
    --text-color: #F9FAFB;
    --border-color: #374151;
}

/* ===== 카드 스타일 강화 ===== */
.card-shadow {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.card-shadow:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

/* ===== 기본 스타일 ===== */
.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.dark .gradient-bg {
    background: linear-gradient(135deg, #4C1D95 0%, #581C87 100%);
}

.card-shadow {
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.card-shadow:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

/* 카드 텍스트 색상 강제 적용 */
.bg-gradient-to-r h3,
.bg-gradient-to-r p,
.bg-gradient-to-r div,
.bg-gradient-to-r i {
    color: white !important;
}

/* 특정 카드 배경 강화 */
.bg-gradient-to-r.from-indigo-500 {
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%) !important;
    color: white !important;
}

.bg-gradient-to-r.from-indigo-500 * {
    color: white !important;
}

.evaluation-bar {
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.evaluation-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ===== 애니메이션 ===== */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.loading-spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* ===== 레이아웃 ===== */
.sticky-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
}

.dark .sticky-header {
    background: rgba(17, 24, 39, 0.9);
}

.mobile-menu {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.open {
    transform: translateX(0);
}

/* ===== 인터랙션 ===== */
.tooltip {
    position: relative;
}

.tooltip:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 1000;
    opacity: 0;
    animation: tooltipFade 0.3s ease forwards;
}

@keyframes tooltipFade {
    to { opacity: 1; }
}

.virtual-scroll {
    height: 600px;
    overflow-y: auto;
}

.rank-badge {
    background: linear-gradient(45deg, #FFD700, #FFA500);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: bold;
}

/* ===== 비교 모드 ===== */
.comparison-mode .selectable-row {
    cursor: pointer;
    transition: all 0.3s ease;
}

.comparison-mode .selectable-row:hover {
    background-color: rgba(59, 130, 246, 0.1);
}

.comparison-mode .selected-row {
    background-color: rgba(59, 130, 246, 0.2);
    border-left: 4px solid var(--primary-blue);
}

/* ===== 반응형 디자인 ===== */
@media (max-width: 768px) {
    .mobile-hidden { 
        display: none; 
    }
    
    .mobile-full { 
        width: 100%; 
    }
    
    .mobile-text-sm { 
        font-size: 0.875rem; 
    }
    
    .mobile-p-2 { 
        padding: 0.5rem; 
    }
    
    /* 모바일에서 테이블 개선 */
    .overflow-x-auto {
        -webkit-overflow-scrolling: touch;
    }
    
    /* 모바일에서 카드 간격 조정 */
    .card-shadow {
        margin-bottom: 1rem;
    }
    
    /* 모바일에서 헤더 조정 */
    .gradient-bg h1 {
        font-size: 2rem;
    }
    
    .gradient-bg p {
        font-size: 1rem;
    }
}

@media (max-width: 640px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    /* 더 작은 화면에서 추가 조정 */
    .grid {
        grid-template-columns: 1fr;
    }
    
    .lg\:grid-cols-4,
    .md\:grid-cols-2,
    .md\:grid-cols-3,
    .md\:grid-cols-4,
    .md\:grid-cols-5 {
        grid-template-columns: 1fr;
    }
}

/* ===== 프린트 스타일 ===== */
@media print {
    body { 
        font-size: 12px; 
    }
    
    .no-print { 
        display: none !important; 
    }
    
    .card-shadow { 
        box-shadow: none; 
    }
    
    .gradient-bg {
        background: #667eea !important;
        -webkit-print-color-adjust: exact;
    }
    
    /* 프린트에서 페이지 나누기 방지 */
    .card-shadow,
    .bg-white {
        page-break-inside: avoid;
    }
}

/* ===== 접근성 개선 ===== */
.focus-visible:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

.screen-reader-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 키보드 네비게이션 개선 */
button:focus,
select:focus,
input:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* ===== 아이콘 백업 스타일 ===== */
.icon-fallback {
    display: inline-block;
    width: 1em;
    height: 1em;
    text-align: center;
}

/* FontAwesome이 로드되지 않았을 때 대체 텍스트 */
.fas:not([class*="fa-"]):before,
.far:not([class*="fa-"]):before,
.fab:not([class*="fa-"]):before {
    content: "●";
}

/* ===== 다크모드 스타일 ===== */
.dark {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.dark .bg-white {
    background-color: #1F2937;
    color: #F9FAFB;
}

.dark .bg-gray-50 {
    background-color: #374151;
}

.dark .bg-gray-100 {
    background-color: #4B5563;
}

.dark .text-gray-800 {
    color: #F9FAFB;
}

.dark .text-gray-600 {
    color: #D1D5DB;
}

.dark .border-gray-300 {
    border-color: #4B5563;
}

/* ===== 추가 유틸리티 클래스 ===== */
.transition-all {
    transition: all 0.3s ease;
}

.transform {
    transform: translateZ(0);
}

.hover\:scale-110:hover {
    transform: scale(1.1);
}

.hover\:scale-105:hover {
    transform: scale(1.05);
}

/* 스크롤바 스타일링 */
.virtual-scroll::-webkit-scrollbar {
    width: 8px;
}

.virtual-scroll::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.virtual-scroll::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

.virtual-scroll::-webkit-scrollbar-thumb:hover {
    background: #555;
}

.dark .virtual-scroll::-webkit-scrollbar-track {
    background: #374151;
}

.dark .virtual-scroll::-webkit-scrollbar-thumb {
    background: #6B7280;
}

.dark .virtual-scroll::-webkit-scrollbar-thumb:hover {
    background: #9CA3AF;
}

/* ===== 커스텀 컴포넌트 스타일 ===== */
.progress-bar {
    background: linear-gradient(90deg, var(--primary-blue) 0%, var(--primary-green) 100%);
    height: 4px;
    border-radius: 2px;
    transition: width 0.5s ease;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-primary {
    background-color: rgba(59, 130, 246, 0.1);
    color: #1D4ED8;
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: #D97706;
}

.badge-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #DC2626;
}

/* 다크모드에서 배지 색상 조정 */
.dark .badge-primary {
    background-color: rgba(59, 130, 246, 0.2);
    color: #93C5FD;
}

.dark .badge-success {
    background-color: rgba(16, 185, 129, 0.2);
    color: #86EFAC;
}

.dark .badge-warning {
    background-color: rgba(245, 158, 11, 0.2);
    color: #FCD34D;
}

.dark .badge-danger {
    background-color: rgba(239, 68, 68, 0.2);
    color: #FCA5A5;
}

/* ===== 성능 최적화 ===== */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* GPU 가속 활성화 */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000;
}

/* ===== 로딩 상태 ===== */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

.dark .skeleton {
    background: linear-gradient(90deg, #374151 25%, #4B5563 50%, #374151 75%);
    background-size: 200% 100%;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}