/* =============================================
   공감각 디자인 스튜디오 - 포트폴리오 페이지 스타일
   Arctic Blue & Luxury Gold Theme
   ============================================= */

/* ===== Portfolio Stats ===== */
.portfolio-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-2xl);
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--navy-200);
    position: relative;
    overflow: hidden;
}

.portfolio-stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.portfolio-stats .stat {
    text-align: center;
}

.portfolio-stats .stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-arctic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.portfolio-stats .stat:nth-child(2) .stat-value {
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.portfolio-stats .stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
}

/* ===== Portfolio Grid ===== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-lg);
    min-height: 300px;
}

.portfolio-item {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
    background: var(--bg-card);
    animation: fadeInUp 0.5s ease forwards;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--navy-200);
    transition: all var(--transition-smooth);
    text-decoration: none;
    display: block;
}

.portfolio-item:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    border-color: var(--arctic-300);
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-item:hover img {
    transform: scale(1.08);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, 
        rgba(15, 23, 42, 0.95) 0%, 
        rgba(15, 23, 42, 0.5) 40%, 
        transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-lg);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-category {
    display: inline-block;
    padding: 6px 14px;
    background: var(--gradient-arctic);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-sm);
    width: fit-content;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.portfolio-item:nth-child(even) .portfolio-category {
    background: var(--gradient-gold);
    color: var(--text-primary);
}

.portfolio-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: white;
}

.portfolio-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
}

.portfolio-view-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--primary);
    opacity: 0;
    transition: all var(--transition-smooth);
    box-shadow: var(--shadow-arctic);
}

.portfolio-item:nth-child(even) .portfolio-view-icon {
    color: var(--secondary);
    box-shadow: var(--shadow-gold);
}

.portfolio-item:hover .portfolio-view-icon {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* Placeholder for items without images */
.portfolio-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--arctic-50) 0%, var(--gold-50) 100%);
    color: var(--text-muted);
    position: relative;
    overflow: hidden;
}

.portfolio-placeholder::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(245, 158, 11, 0.08) 0%, transparent 50%);
}

.portfolio-placeholder i {
    font-size: 4rem;
    margin-bottom: var(--space-sm);
    background: var(--gradient-arctic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
}

.portfolio-placeholder span {
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    z-index: 1;
}

/* ===== Loading State ===== */
.loading-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    color: var(--text-muted);
}

.spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--arctic-100);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-lg);
}

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

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: var(--space-3xl);
}

.empty-icon {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--space-xl);
    background: linear-gradient(135deg, var(--arctic-50) 0%, var(--gold-50) 100%);
    border: 2px solid var(--navy-200);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-icon i {
    font-size: 3.5rem;
    background: var(--gradient-arctic);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state h3 {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.empty-state p {
    color: var(--text-muted);
}

/* ===== Load More ===== */
.load-more-container {
    text-align: center;
    margin-top: var(--space-2xl);
}

/* ===== Portfolio Modal ===== */
.portfolio-modal {
    max-width: 950px;
    max-height: 90vh;
    overflow: hidden;
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
}

.portfolio-modal .modal-body {
    padding: 0;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
}

.modal-image {
    background: linear-gradient(135deg, var(--arctic-50) 0%, var(--gold-50) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    max-height: 70vh;
    overflow: hidden;
    position: relative;
}

.modal-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 30% 30%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(245, 158, 11, 0.06) 0%, transparent 50%);
}

.modal-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    position: relative;
    z-index: 1;
}

.modal-info {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
}

.modal-category {
    display: inline-block;
    padding: 8px 18px;
    background: var(--gradient-arctic);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
    margin-bottom: var(--space-lg);
    width: fit-content;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-info h2 {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
}

.modal-info p {
    color: var(--text-secondary);
    line-height: 1.8;
    flex-grow: 1;
}

.modal-meta {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--navy-200);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.meta-item i {
    width: 24px;
    color: var(--primary);
}

/* ===== CTA Section ===== */
.cta-section {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-950) 100%);
    position: relative;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--arctic-500), var(--gold-400), transparent);
}

.cta-box {
    padding: var(--space-2xl) var(--space-3xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2xl);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-2xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

.cta-content h2 {
    margin-bottom: var(--space-sm);
    color: var(--text-light);
    font-size: 1.75rem;
}

.cta-content p {
    color: var(--navy-300);
    font-size: 1.05rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .portfolio-modal .modal-body {
        grid-template-columns: 1fr;
    }
    
    .modal-image {
        max-height: 45vh;
    }
    
    .cta-box {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--space-md);
    }
    
    .portfolio-stats {
        gap: var(--space-xl);
        padding: var(--space-md) var(--space-lg);
    }

    .portfolio-stats .stat-value {
        font-size: 2rem;
    }
    
    .portfolio-item {
        aspect-ratio: 4/3;
    }
    
    .portfolio-overlay {
        opacity: 1;
        background: linear-gradient(to top, 
            rgba(15, 23, 42, 0.9) 0%, 
            rgba(15, 23, 42, 0.4) 50%, 
            transparent 100%);
    }
    
    .portfolio-view-icon {
        display: none;
    }
    
    .modal-info {
        padding: var(--space-lg);
    }
    
    .modal-info h2 {
        font-size: 1.35rem;
    }
}

@media (max-width: 480px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--space-sm);
        -webkit-overflow-scrolling: touch;
        gap: 8px;
    }
    
    .filter-tab {
        flex-shrink: 0;
    }
}