/* 2페이지: 포트폴리오 섹션 - Museum/Gallery Exhibition Design */

/* 페이지 배경 */
.page-portfolio {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
}

/* 포트폴리오 컨테이너 */
.portfolio-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
    position: relative;
    z-index: 2;
    min-height: calc(100vh - 140px);
}

/* 포트폴리오 헤더 */
.portfolio-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border-color);
    animation: fadeInUp 0.8s ease-out;
}

.portfolio-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 3.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    letter-spacing: -1px;
    line-height: 1.1;
}

.portfolio-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* 필터 버튼 */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.filter-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--text-primary);
    color: var(--white);
    border-color: var(--text-primary);
}

/* 포트폴리오 슬라이더 */
.portfolio-slider {
    flex: 1;
    position: relative;
    padding: var(--space-lg) 0;
}

.portfolio-swiper {
    width: 100%;
    height: 100%;
    padding: var(--space-xl) 80px;
}

.portfolio-slide {
    height: auto;
    display: flex;
    align-items: stretch;
    opacity: 0;
    animation: fadeIn 0.6s ease-out forwards;
}

/* 프로젝트 카드 - Gallery Exhibition Style */
.project-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0;
    overflow: hidden;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-slow);
    height: 100%;
    display: flex;
    flex-direction: column;
    max-width: 380px;
    margin: 0 auto;
}

.project-card:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-8px);
}

/* 프로젝트 이미지 */
.project-image {
    position: relative;
    height: 280px;
    overflow: hidden;
    background: var(--bg-tertiary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
    filter: grayscale(20%);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
    filter: grayscale(0%);
}

/* 프로젝트 오버레이 */
.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: 1px solid var(--white);
    color: var(--white);
    text-decoration: none;
    font-weight: 400;
    font-size: 0.85rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: var(--transition);
    cursor: pointer;
}

.action-btn:hover {
    background: var(--white);
    color: var(--text-primary);
}

.action-btn i {
    font-size: 1rem;
}

/* 프로젝트 콘텐츠 */
.project-content {
    padding: var(--space-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

.project-category {
    background: transparent;
    color: var(--accent-color);
    padding: 0;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.project-date {
    color: var(--text-light);
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.project-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    flex: 1;
    font-size: 0.95rem;
}

/* 기술 태그 */
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.tech-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    cursor: default;
    pointer-events: none;
    user-select: none;
}

/* 프로젝트 통계 */
.project-stats {
    display: flex;
    gap: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: center;
    flex: 1;
}

.stat-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-light);
    margin-bottom: var(--space-xs);
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.stat-value {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Swiper 커스터마이징 */
.portfolio-swiper {
    position: relative;
}

/* 포트폴리오 네비게이션 버튼 */
.portfolio-btn-prev,
.portfolio-btn-next {
    background: var(--bg-primary) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 0 !important;
    width: 48px !important;
    height: 48px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: var(--shadow-subtle) !important;
    transition: var(--transition) !important;
    cursor: pointer !important;
    position: absolute !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    z-index: 15 !important;
    margin-top: 0 !important;
    pointer-events: auto !important;
}

.portfolio-btn-prev {
    left: 20px !important;
}

.portfolio-btn-next {
    right: 20px !important;
}

.portfolio-btn-prev::after,
.portfolio-btn-next::after {
    font-size: 20px !important;
    color: var(--text-primary) !important;
    font-weight: normal !important;
    font-family: inherit !important;
}

.portfolio-btn-prev::after {
    content: '←' !important;
}

.portfolio-btn-next::after {
    content: '→' !important;
}

.portfolio-btn-prev:hover,
.portfolio-btn-next:hover {
    background: var(--text-primary) !important;
    border-color: var(--text-primary) !important;
    box-shadow: var(--shadow-light) !important;
}

.portfolio-btn-prev:hover::after,
.portfolio-btn-next:hover::after {
    color: var(--white) !important;
}

.portfolio-btn-prev.swiper-button-disabled,
.portfolio-btn-next.swiper-button-disabled {
    opacity: 0.3 !important;
    cursor: not-allowed !important;
    pointer-events: none !important;
}

/* 포트폴리오 네비게이션 컨테이너 */
.portfolio-navigation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 10;
}

.portfolio-swiper .swiper-pagination {
    position: absolute !important;
    bottom: 0 !important;
    left: 50% !important;
    transform: translateX(-50%) !important;
    width: auto !important;
    text-align: center;
    z-index: 10;
}

.portfolio-swiper .swiper-pagination-bullet {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    opacity: 1;
    width: 10px;
    height: 10px;
    margin: 0 6px;
    transition: var(--transition);
}

.portfolio-swiper .swiper-pagination-bullet-active {
    background: var(--text-primary);
    border-color: var(--text-primary);
    transform: scale(1.4);
}

/* 프로젝트 상세 모달 */
.project-modal {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    z-index: 10001 !important;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.project-modal.active {
    display: flex !important;
    opacity: 1 !important;
    justify-content: center !important;
    align-items: center !important;
    padding: var(--space-xl) !important;
    pointer-events: auto !important;
}

.modal-overlay {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    background: rgba(0, 0, 0, 0.85) !important;
    backdrop-filter: blur(8px) !important;
    cursor: pointer;
    z-index: 10000 !important;
}

.modal-content {
    position: relative !important;
    background: var(--bg-primary) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 0 !important;
    max-width: 900px !important;
    width: 90% !important;
    max-height: 85vh !important;
    margin: 0 auto !important;
    box-shadow: var(--shadow-strong) !important;
    overflow: hidden !important;
    animation: modalSlideIn 0.4s ease !important;
    z-index: 10002 !important;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(40px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    background: transparent;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    font-size: 20px;
    color: var(--text-primary);
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--text-primary);
    color: var(--white);
    border-color: var(--text-primary);
}

.modal-body {
    padding: var(--space-2xl);
    max-height: calc(85vh - 80px);
    overflow-y: auto;
}

/* 모달 스크롤바 */
.modal-body::-webkit-scrollbar {
    width: 8px;
}

.modal-body::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

/* ===== 모달 내부 콘텐츠 스타일 ===== */

/* 프로젝트 상세 레이아웃 */
.project-detail {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.project-detail .project-header {
    display: flex;
    gap: var(--space-2xl);
    align-items: flex-start;
}

/* 메인 이미지 */
.project-detail .project-main-image {
    width: 380px;
    min-width: 380px;
    height: 260px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

/* 프로젝트 정보 영역 */
.project-detail .project-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.project-detail .project-info .project-meta {
    display: flex;
    justify-content: flex-start;
    gap: var(--space-lg);
    align-items: center;
    margin-bottom: 0;
    padding-bottom: var(--space-sm);
    border-bottom: none;
}

.project-detail .project-info .project-title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.project-detail .project-info .project-description {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* Demo / GitHub 링크 버튼 */
.project-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-decoration: none;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    text-transform: uppercase;
}

.project-link i {
    font-style: normal;
    font-size: 1rem;
}

.project-link.demo-link {
    background: var(--text-primary);
    color: var(--white);
    border-color: var(--text-primary);
}

.project-link.demo-link:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.project-link.github-link {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--text-primary);
}

.project-link.github-link:hover {
    background: var(--text-primary);
    color: var(--white);
}

/* 상세 섹션 공통 */
.project-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

.detail-section {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.detail-section h3 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.3px;
}

/* 기술 스택 그리드 */
.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tech-item {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* 도전과제 */
.challenges {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.challenge-item {
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.challenge-item h4 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.challenge-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.challenge-item .solution {
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.challenge-item .solution strong {
    color: var(--accent-color);
    font-weight: 600;
    margin-right: var(--space-xs);
}

/* 성과 그리드 */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-lg);
}

.result-item {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    align-items: flex-start;
}

.result-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    text-align: center;
}

.result-content h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.result-content p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.result-value {
    display: inline-block;
    margin-top: var(--space-sm);
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-color);
}

/* 스크린샷 그리드 */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.screenshot-item {
    border: 1px solid var(--border-color);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.screenshot-item:hover {
    box-shadow: var(--shadow-medium);
    transform: translateY(-4px);
}

.screenshot-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    transition: var(--transition);
}

.screenshot-item:hover img {
    transform: scale(1.03);
}

.screenshot-caption {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8rem;
    color: var(--text-light);
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

/* 모달 에러 */
.modal-error {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.modal-error h3 {
    font-family: 'Playfair Display', Georgia, serif;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

/* ===== 모달 내부 반응형 ===== */
@media (max-width: 768px) {
    .project-detail .project-header {
        flex-direction: column;
    }

    .project-detail .project-main-image {
        width: 100%;
        min-width: unset;
        height: 220px;
    }

    .project-detail .project-info .project-title {
        font-size: 1.4rem;
    }

    .project-links {
        flex-direction: column;
    }

    .project-link {
        justify-content: center;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .screenshots-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .project-detail .project-main-image {
        height: 180px;
    }

    .project-detail .project-info .project-title {
        font-size: 1.2rem;
    }

    .detail-section h3 {
        font-size: 1.1rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }
}

/* 필터 애니메이션 */
.portfolio-slide {
    opacity: 1;
    transform: scale(1);
    transition: var(--transition-slow);
}

.portfolio-slide.filtered {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
}

.portfolio-empty-state {
    width: 100%;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    box-shadow: var(--shadow-subtle);
}

/* 로딩 애니메이션 */
.portfolio-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 300px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-loading.active {
    opacity: 1;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 반응형 디자인 */
@media (max-width: 1024px) {
    .portfolio-container {
        max-width: 100%;
        padding: var(--space-xl) var(--space-md);
    }

    .portfolio-title {
        font-size: 2.8rem;
    }

    .project-image {
        height: 240px;
    }

    .portfolio-swiper {
        padding: var(--space-lg) 60px;
    }

    .portfolio-btn-prev {
        left: 15px !important;
    }

    .portfolio-btn-next {
        right: 15px !important;
    }
}

@media (max-width: 768px) {
    .portfolio-container {
        gap: var(--space-xl);
        padding: var(--space-lg) var(--space-sm);
    }

    .portfolio-title {
        font-size: 2.2rem;
    }

    .portfolio-subtitle {
        font-size: 0.95rem;
    }

    .portfolio-filters {
        gap: var(--space-sm);
    }

    .filter-btn {
        padding: var(--space-sm) var(--space-md);
        font-size: 0.75rem;
    }

    .portfolio-swiper {
        padding: var(--space-md) 50px;
    }

    .project-card {
        max-width: 340px;
    }

    .project-image {
        height: 200px;
    }

    .project-content {
        padding: var(--space-lg);
    }

    .project-title {
        font-size: 1.3rem;
    }

    .project-actions {
        gap: var(--space-sm);
    }

    .action-btn {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.75rem;
    }

    .project-stats {
        gap: var(--space-lg);
    }

    .modal-content {
        width: 95% !important;
    }

    .modal-body {
        padding: var(--space-xl);
    }

    .portfolio-btn-prev,
    .portfolio-btn-next {
        width: 40px !important;
        height: 40px !important;
    }

    .portfolio-btn-prev {
        left: 10px !important;
    }

    .portfolio-btn-next {
        right: 10px !important;
    }
}

@media (max-width: 480px) {
    .portfolio-title {
        font-size: 1.8rem;
    }

    .portfolio-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-btn {
        width: 100%;
        text-align: center;
    }

    .portfolio-swiper {
        padding: var(--space-sm) 45px;
    }

    .project-card {
        max-width: 300px;
    }

    .project-image {
        height: 180px;
    }

    .project-content {
        padding: var(--space-md);
    }

    .project-meta {
        flex-direction: column;
        gap: var(--space-xs);
        align-items: flex-start;
    }

    .tech-tag {
        font-size: 0.7rem;
        padding: 4px 8px;
    }

    .project-stats {
        flex-direction: column;
        gap: var(--space-md);
    }

    .stat {
        padding: var(--space-sm);
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
    }

    .modal-body {
        padding: var(--space-lg);
    }

    .portfolio-btn-prev,
    .portfolio-btn-next {
        width: 36px !important;
        height: 36px !important;
        font-size: 16px !important;
    }

    .portfolio-btn-prev {
        left: 5px !important;
    }

    .portfolio-btn-next {
        right: 5px !important;
    }

    .portfolio-swiper .swiper-pagination-bullet {
        width: 8px;
        height: 8px;
        margin: 0 4px;
    }
}