/* ========================================
   IP Theme Patent Cards Enhanced Styles
   IP 테마 특허 카드 향상된 스타일
   ======================================== */

/* ===== 특허 그리드 레이아웃 ===== */
.patent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .patent-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* ===== IP 특허 카드 스타일 ===== */
.ip-patent-card {
    background: white;
    border: 1px solid var(--ip-border-color, #e5e7eb);
    border-radius: var(--ip-border-radius-lg, 0.75rem);
    box-shadow: var(--ip-shadow-sm, 0 1px 3px 0 rgba(0, 0, 0, 0.1));
    transition: all var(--ip-transition-fast, 0.15s ease);
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.ip-patent-card:hover {
    box-shadow: var(--ip-shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.1));
    transform: translateY(-2px);
    border-color: var(--ip-primary-300, #7dd3fc);
}

.ip-patent-card:focus-within {
    outline: 2px solid var(--ip-primary-500, #0ea5e9);
    outline-offset: 2px;
}

/* 특허 카드 헤더 */
.ip-patent-card-header {
    padding: 1rem 1.25rem 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.patent-status-indicators {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
}

.patent-favorite-action {
    flex-shrink: 0;
}

/* 특허 카드 본문 */
.ip-patent-card-body {
    padding: 1rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.patent-institution {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--ip-text-muted, #6b7280);
    font-size: 0.875rem;
    font-weight: 500;
}

.patent-institution i {
    color: var(--ip-primary-500, #0ea5e9);
    font-size: 1rem;
}

.institution-name {
    color: var(--ip-text-primary, #111827);
}

.patent-title {
    margin: 0;
    line-height: 1.4;
}

.patent-title-link {
    color: var(--ip-text-primary, #111827);
    text-decoration: none;
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    transition: color var(--ip-transition-fast, 0.15s ease);
    display: block;
}

.patent-title-link:hover,
.patent-title-link:focus {
    color: var(--ip-primary-600, #0284c7);
    text-decoration: none;
}

.patent-summary {
    flex: 1;
}

.summary-text {
    color: var(--ip-text-secondary, #4b5563);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.patent-metadata {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--ip-border-color-light, #f3f4f6);
}

.metadata-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.metadata-item i {
    color: var(--ip-primary-500, #0ea5e9);
    font-size: 0.875rem;
    width: 14px;
    text-align: center;
}

.metadata-label {
    color: var(--ip-text-muted, #6b7280);
    font-weight: 500;
    min-width: 50px;
}

.metadata-value {
    color: var(--ip-text-primary, #111827);
    font-weight: 500;
}

/* 특허 카드 푸터 */
.ip-patent-card-footer {
    padding: 1rem 1.25rem;
    background: var(--ip-background-light, #f9fafb);
    border-top: 1px solid var(--ip-border-color-light, #f3f4f6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.patent-actions {
    flex: 1;
}

.patent-extra-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.extra-info-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--ip-text-muted, #6b7280);
    background: var(--ip-primary-50, #f0f9ff);
    padding: 0.25rem 0.5rem;
    border-radius: var(--ip-border-radius-sm, 0.375rem);
    border: 1px solid var(--ip-primary-200, #bae6fd);
}

.extra-info-item i {
    font-size: 0.75rem;
    color: var(--ip-primary-600, #0284c7);
}

/* IP 배지 스타일 */
.ip-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--ip-border-radius-full, 9999px);
    border: 1px solid transparent;
    transition: all var(--ip-transition-fast, 0.15s ease);
}

.ip-badge-promising {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: white;
    border-color: #f59e0b;
    box-shadow: 0 2px 4px rgba(251, 191, 36, 0.3);
}

.ip-badge-trl {
    background: var(--ip-primary-100, #dbeafe);
    color: var(--ip-primary-700, #0369a1);
    border-color: var(--ip-primary-300, #7dd3fc);
}

.ip-badge-category {
    background: var(--ip-secondary-100, #f1f5f9);
    color: var(--ip-secondary-700, #334155);
    border-color: var(--ip-secondary-300, #cbd5e1);
}

/* 아이콘 버튼 스타일 */
.ip-btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 2px solid var(--ip-border-color, #e5e7eb);
    border-radius: var(--ip-border-radius-full, 9999px);
    background: white;
    color: var(--ip-text-muted, #6b7280);
    text-decoration: none;
    transition: all var(--ip-transition-fast, 0.15s ease);
    cursor: pointer;
    font-size: 1.125rem;
}

.ip-btn-icon:hover {
    background: var(--ip-primary-50, #f0f9ff);
    border-color: var(--ip-primary-300, #7dd3fc);
    color: var(--ip-primary-600, #0284c7);
    transform: scale(1.05);
    text-decoration: none;
}

.ip-btn-icon:focus {
    outline: 2px solid var(--ip-primary-500, #0ea5e9);
    outline-offset: 2px;
    text-decoration: none;
}

.ip-btn-icon.active {
    background: var(--ip-primary-500, #0ea5e9);
    border-color: var(--ip-primary-500, #0ea5e9);
    color: white;
}

.ip-btn-icon.active:hover {
    background: var(--ip-primary-600, #0284c7);
    border-color: var(--ip-primary-600, #0284c7);
    color: white;
}

/* 빈 상태 스타일 */
.patent-empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--ip-text-muted, #6b7280);
    max-width: 600px;
    margin: 0 auto;
}

.empty-state-icon {
    margin-bottom: 1.5rem;
}

.empty-state-icon i {
    font-size: 4rem;
    color: var(--ip-primary-300, #7dd3fc);
    opacity: 0.7;
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--ip-text-primary, #111827);
    margin-bottom: 1rem;
}

.empty-state-description {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: var(--ip-text-secondary, #4b5563);
}

.empty-state-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.empty-state-suggestions {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--ip-border-color-light, #f3f4f6);
}

.suggestions-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ip-text-muted, #6b7280);
    margin-bottom: 0.75rem;
}

.suggestions-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.suggestion-tag {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: var(--ip-primary-50, #f0f9ff);
    color: var(--ip-primary-600, #0284c7);
    text-decoration: none;
    border-radius: var(--ip-border-radius-full, 9999px);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--ip-primary-200, #bae6fd);
    transition: all var(--ip-transition-fast, 0.15s ease);
}

.suggestion-tag:hover {
    background: var(--ip-primary-100, #dbeafe);
    color: var(--ip-primary-700, #0369a1);
    border-color: var(--ip-primary-300, #7dd3fc);
    text-decoration: none;
    transform: translateY(-1px);
}

/* IP 페이지네이션 스타일 */
.ip-pagination-container {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid var(--ip-border-color-light, #f3f4f6);
}

.ip-pagination-info {
    text-align: center;
    margin-bottom: 1.5rem;
}

.pagination-summary {
    font-size: 0.9rem;
    color: var(--ip-text-secondary, #4b5563);
}

.pagination-summary strong {
    color: var(--ip-primary-600, #0284c7);
    font-weight: 600;
}

.ip-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.ip-page-item {
    margin: 0;
}

.ip-page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ip-text-primary, #111827);
    text-decoration: none;
    background: white;
    border: 1px solid var(--ip-border-color, #e5e7eb);
    border-radius: var(--ip-border-radius-md, 0.5rem);
    transition: all var(--ip-transition-fast, 0.15s ease);
    min-width: 44px;
    min-height: 44px;
}

.ip-page-link:hover:not(.disabled) {
    background: var(--ip-primary-50, #f0f9ff);
    border-color: var(--ip-primary-300, #7dd3fc);
    color: var(--ip-primary-700, #0369a1);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--ip-shadow-sm, 0 1px 3px 0 rgba(0, 0, 0, 0.1));
}

.ip-page-link.active {
    background: var(--ip-primary-600, #0284c7);
    border-color: var(--ip-primary-600, #0284c7);
    color: white;
    box-shadow: var(--ip-shadow-md, 0 4px 6px -1px rgba(0, 0, 0, 0.1));
}

.ip-page-link.disabled {
    background: var(--ip-background-light, #f9fafb);
    border-color: var(--ip-border-color-light, #f3f4f6);
    color: var(--ip-text-muted, #6b7280);
    cursor: not-allowed;
    opacity: 0.6;
}

.ip-page-prev,
.ip-page-next {
    padding: 0.75rem 1.25rem;
}

.ip-page-ellipsis {
    background: transparent;
    border: none;
    color: var(--ip-text-muted, #6b7280);
    cursor: default;
}

.ip-page-ellipsis:hover {
    background: transparent;
    border: none;
    color: var(--ip-text-muted, #6b7280);
    transform: none;
    box-shadow: none;
}

.page-text {
    font-size: 0.875rem;
    font-weight: 500;
}

/* 페이지네이션 단축키 */
.ip-pagination-shortcuts {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--ip-border-color-light, #f3f4f6);
}

.pagination-shortcuts-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.shortcuts-label {
    font-size: 0.875rem;
    color: var(--ip-text-muted, #6b7280);
    font-weight: 500;
}

.shortcuts-buttons {
    display: flex;
    gap: 0.5rem;
}

/* 반응형 페이지네이션 */
@media (max-width: 768px) {
    .ip-pagination {
        gap: 0.125rem;
    }
    
    .ip-page-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.8125rem;
        min-width: 40px;
        min-height: 40px;
    }
    
    .ip-page-prev,
    .ip-page-next {
        padding: 0.5rem 1rem;
    }
    
    .page-text {
        display: none;
    }
    
    .pagination-shortcuts-content {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .empty-state-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .empty-state-actions .ip-btn {
        width: 100%;
        max-width: 280px;
    }
}

@media (max-width: 480px) {
    .patent-empty-state {
        padding: 2rem 1rem;
    }
    
    .empty-state-icon i {
        font-size: 3rem;
    }
    
    .empty-state-title {
        font-size: 1.25rem;
    }
    
    .ip-pagination-container {
        padding: 1.5rem 0;
    }
    
    .ip-page-link {
        padding: 0.375rem 0.5rem;
        min-width: 36px;
        min-height: 36px;
    }
}

/* 반응형 조정 */
@media (max-width: 576px) {
    .ip-patent-card-header {
        padding: 0.75rem 1rem 0;
    }
    
    .ip-patent-card-body {
        padding: 0.75rem 1rem;
    }
    
    .ip-patent-card-footer {
        padding: 0.75rem 1rem;
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }
    
    .patent-extra-info {
        justify-content: center;
    }
    
    .patent-metadata {
        gap: 0.375rem;
    }
    
    .metadata-item {
        font-size: 0.8125rem;
    }
    
    .patent-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
}

/* 로딩 상태 */
.patent-card-loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.patent-card-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2rem;
    height: 2rem;
    margin: -1rem 0 0 -1rem;
    border: 3px solid var(--ip-border-color, #e5e7eb);
    border-radius: 50%;
    border-top-color: var(--ip-primary-500, #0ea5e9);
    animation: patent-card-spin 0.8s linear infinite;
    z-index: 10;
}

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

/* 애니메이션 효과 */
.ip-patent-card {
    animation: fadeInCard 0.5s ease-out;
}

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

/* 고대비 모드 지원 */
@media (prefers-contrast: high) {
    .ip-patent-card {
        border-width: 2px;
    }
    
    .ip-btn-icon {
        border-width: 3px;
    }
    
    .ip-badge {
        border-width: 2px;
        border-color: currentColor;
    }
}

/* 모션 감소 설정 */
@media (prefers-reduced-motion: reduce) {
    .ip-patent-card,
    .ip-btn-icon,
    .patent-title-link,
    .patent-card-loading::after {
        animation: none !important;
        transition: none !important;
    }
    
    .ip-patent-card:hover,
    .ip-btn-icon:hover {
        transform: none !important;
    }
}

/* 다크 모드 지원 (선택사항) */
@media (prefers-color-scheme: dark) {
    .ip-patent-card {
        background: #1f2937;
        border-color: #374151;
    }
    
    .patent-title-link {
        color: #f9fafb;
    }
    
    .patent-title-link:hover {
        color: #60a5fa;
    }
    
    .summary-text {
        color: #d1d5db;
    }
    
    .metadata-label {
        color: #9ca3af;
    }
    
    .metadata-value {
        color: #f3f4f6;
    }
    
    .ip-patent-card-footer {
        background: #111827;
        border-color: #374151;
    }
    
    .ip-btn-icon {
        background: #374151;
        border-color: #4b5563;
        color: #d1d5db;
    }
    
    .ip-btn-icon:hover {
        background: #1e40af;
        border-color: #3b82f6;
        color: white;
    }
}