/* =====================================================
   BLITZ STUDIO - Portfolio Page Styles
   Premium Portfolio Grid with Animations
   ===================================================== */

/* =====================================================
   Portfolio Hero
   ===================================================== */
.portfolio-hero {
    padding: 160px 0 80px;
    position: relative;
    overflow: hidden;
    min-height: 50vh;
    display: flex;
    align-items: center;
}

.portfolio-hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.portfolio-hero-title {
    margin-bottom: 24px;
}

.portfolio-hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* =====================================================
   Portfolio Filter
   ===================================================== */
.portfolio-filter {
    padding: 40px 0;
    position: relative;
    z-index: 10;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border);
}

.filter-tabs {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-tab {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 12px 24px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.filter-tab:hover {
    border-color: var(--border-green);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.filter-tab.active {
    background: var(--gradient-primary);
    border-color: var(--primary);
    color: var(--bg-dark);
    box-shadow: 0 4px 20px var(--glow-primary);
}

/* =====================================================
   Portfolio Grid
   ===================================================== */
.portfolio-grid-section {
    padding: 80px 0;
    background: var(--bg-dark);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.portfolio-item {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.portfolio-item.hidden {
    display: none;
}

/* Large portfolio item spans 2 columns */
.portfolio-item-large {
    grid-column: span 2;
}

.portfolio-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.portfolio-card:hover {
    border-color: var(--border-green);
    transform: translateY(-8px);
    box-shadow: 0 30px 60px rgba(29, 185, 84, 0.15);
}

/* Portfolio Image */
.portfolio-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.portfolio-item-large .portfolio-image {
    aspect-ratio: 16/9;
}

.image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: rgba(255, 255, 255, 0.3);
    transition: transform 0.5s ease;
}

.portfolio-card:hover .image-placeholder {
    transform: scale(1.05);
}

/* Portfolio Overlay */
.portfolio-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0) 0%,
        rgba(0, 0, 0, 0.8) 50%,
        rgba(0, 0, 0, 0.95) 100%
    );
    display: flex;
    align-items: flex-end;
    padding: 32px;
    opacity: 0;
    transition: opacity 0.5s ease;
}

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

.overlay-content {
    width: 100%;
    transform: translateY(20px);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card:hover .overlay-content {
    transform: translateY(0);
}

.project-category {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--bg-dark);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.project-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.project-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

/* Project Stats */
.project-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
}

.project-stats .stat {
    text-align: left;
}

.project-stats .stat-value {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 4px;
}

.project-stats .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.portfolio-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-green);
    color: var(--primary);
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.portfolio-btn:hover {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    transform: translateX(4px);
}

.portfolio-btn i {
    transition: transform 0.3s ease;
}

.portfolio-btn:hover i {
    transform: translateX(4px);
}

/* Portfolio Info (below image) */
.portfolio-info {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.portfolio-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.info-tag {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}

/* =====================================================
   Results Section
   ===================================================== */
.portfolio-results {
    padding: var(--section-padding) 0;
    background: var(--bg-card);
    position: relative;
}

.portfolio-results::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-green), transparent);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.result-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px 32px;
    text-align: center;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

.result-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-green);
    box-shadow: 0 20px 60px rgba(29, 185, 84, 0.15);
}

.result-card:hover::before {
    transform: scaleX(1);
}

.result-icon {
    width: 64px;
    height: 64px;
    background: var(--bg-dark);
    border: 1px solid var(--border-green);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: var(--primary);
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.result-card:hover .result-icon {
    background: var(--gradient-primary);
    color: var(--bg-dark);
    transform: scale(1.1) rotate(5deg);
}

.result-number {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 12px;
}

.result-number .counter-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.result-suffix {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}

.result-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-item-large {
        grid-column: span 2;
    }

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portfolio-hero {
        padding: 120px 0 60px;
    }

    .portfolio-filter {
        padding: 20px 0;
    }

    .filter-tabs {
        gap: 8px;
    }

    .filter-tab {
        padding: 10px 16px;
        font-size: 13px;
    }

    .portfolio-grid-section {
        padding: 40px 0;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .portfolio-item-large {
        grid-column: span 1;
    }

    .portfolio-image {
        aspect-ratio: 16/9;
    }

    .project-title {
        font-size: 20px;
    }

    .project-stats {
        gap: 16px;
    }

    .project-stats .stat-value {
        font-size: 20px;
    }

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .result-card {
        padding: 24px;
    }

    .result-number .counter-value {
        font-size: 36px;
    }

    .result-suffix {
        font-size: 22px;
    }
}

@media (max-width: 480px) {
    .results-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-overlay {
        padding: 20px;
    }
}

/* =====================================================
   Filter Animation
   ===================================================== */
.portfolio-item {
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.portfolio-item.filtering {
    opacity: 0;
    transform: scale(0.9);
}

/* Stagger animations */
.portfolio-grid .portfolio-item:nth-child(1) { transition-delay: 0s; }
.portfolio-grid .portfolio-item:nth-child(2) { transition-delay: 0.1s; }
.portfolio-grid .portfolio-item:nth-child(3) { transition-delay: 0.2s; }
.portfolio-grid .portfolio-item:nth-child(4) { transition-delay: 0.15s; }
.portfolio-grid .portfolio-item:nth-child(5) { transition-delay: 0.25s; }
.portfolio-grid .portfolio-item:nth-child(6) { transition-delay: 0.3s; }

.results-grid .result-card:nth-child(1) { transition-delay: 0s; }
.results-grid .result-card:nth-child(2) { transition-delay: 0.1s; }
.results-grid .result-card:nth-child(3) { transition-delay: 0.2s; }
.results-grid .result-card:nth-child(4) { transition-delay: 0.3s; }