/*
 * Portfolio Page CSS
 */

/* Hero */
.portfolio-hero {
    padding-top: var(--space-4xl);
    padding-bottom: var(--space-lg);
}

/* ==========================================================================
   Tab Filter
   ========================================================================== */
.portfolio-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--rounded-full);
    padding: 8px 20px;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--easing-default);
}
.tab-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}
.tab-btn.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--on-accent);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

/* ==========================================================================
   Portfolio Cards
   ========================================================================== */
.portfolio-card {
    padding: 0;
    overflow: hidden;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    transition: opacity var(--duration-base) var(--easing-out),
                transform var(--duration-base) var(--easing-out),
                box-shadow var(--duration-base) var(--easing-out);
}
.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}
.portfolio-card.is-hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    position: absolute;
    visibility: hidden;
}

.portfolio-thumb {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
    background-color: var(--bg-secondary);
}
.portfolio-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(12px);
    transition: transform var(--duration-slow) var(--easing-default),
                filter 0.5s ease;
}
.portfolio-thumb img.is-loaded {
    filter: blur(0);
}
.portfolio-thumb .img-placeholder {
    border-radius: 0;
    border: none;
}
.portfolio-card:hover .portfolio-thumb img {
    transform: scale(1.06);
}

/* KPI Badge */
.portfolio-kpi {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background-color: var(--accent);
    color: var(--on-accent);
    padding: 6px 14px;
    border-radius: var(--rounded-md);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    z-index: 2;
}

.portfolio-info {
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.portfolio-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.portfolio-info h3 {
    margin-bottom: var(--space-xs);
}
.portfolio-info p {
    flex-grow: 1;
    margin-bottom: var(--space-md);
}

.btn-detail {
    background: transparent;
    border: none;
    color: var(--accent);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    text-align: left;
    transition: color var(--duration-fast);
}
.btn-detail:hover {
    color: var(--accent-hover);
}

/* Staggered reveal for portfolio grid */
.portfolio-grid .portfolio-card:nth-child(1) { transition-delay: 0.05s; }
.portfolio-grid .portfolio-card:nth-child(2) { transition-delay: 0.1s; }
.portfolio-grid .portfolio-card:nth-child(3) { transition-delay: 0.15s; }
.portfolio-grid .portfolio-card:nth-child(4) { transition-delay: 0.2s; }

/* ==========================================================================
   Project Detail Modal
   ========================================================================== */
.portfolio-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-base), visibility var(--duration-base);
}
.portfolio-modal.is-open {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    z-index: 201;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--space-xl);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.4);
    transform: translateY(20px) scale(0.96);
    transition: transform var(--duration-base) var(--easing-spring);
}
.portfolio-modal.is-open .modal-content {
    transform: translateY(0) scale(1);
}

/* 라이트 테마 모달 가독성 보강 */
[data-theme="light"] .modal-content {
    background-color: #ffffff;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.15);
}
[data-theme="light"] .modal-section .body-md {
    color: var(--text-primary);
}
[data-theme="light"] .modal-kpi-item {
    background-color: rgba(var(--accent-rgb), 0.06);
}
[data-theme="light"] .modal-kpi-label {
    color: var(--text-secondary);
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    z-index: 202;
    transition: color var(--duration-fast);
}
.modal-close:hover {
    color: var(--accent);
}

.modal-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    border-radius: var(--rounded-md);
    background-color: var(--bg-secondary);
    margin-bottom: var(--space-xl);
}
.modal-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-section {
    margin-bottom: var(--space-lg);
}
.modal-section .label {
    display: block;
    margin-bottom: var(--space-xs);
}

.modal-kpis {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}
.modal-kpi-item {
    background-color: var(--accent-subtle);
    border: 1px solid var(--accent);
    border-radius: var(--rounded-md);
    padding: var(--space-sm) var(--space-md);
    text-align: center;
}
.modal-kpi-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}
.modal-kpi-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.modal-tech {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.modal-cta {
    margin-top: var(--space-xl);
    text-align: center;
}


/* ==========================================================================
   Mobile Responsive (M-6, M-11)
   ========================================================================== */
@media (max-width: 767px) {
    /* M-6: 탭 수평 스크롤 */
    .portfolio-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: var(--space-xs);
        padding-bottom: var(--space-xs);
    }
    .portfolio-tabs::-webkit-scrollbar {
        display: none;
    }
    .tab-btn {
        flex-shrink: 0;
        font-size: 0.8rem;
        padding: 6px 14px;
    }

    /* M-11: 이미지 높이 축소 */
    .portfolio-thumb {
        height: 200px;
    }

    /* 히어로 패딩 축소 */
    .portfolio-hero {
        padding-top: var(--space-3xl);
    }
}