/* =====================================================
   PROJECT PAGE STYLES - SG ENERGY 2026
   Portfolio Showcase, Statistics, Filters
===================================================== */

/* ===================== PROJECT STATISTICS ===================== */
.project-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-2xl) 0;
}

.stat-box {
    background: #fff;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-light);
    text-align: center;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

    .stat-box::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: var(--gradient-primary);
        transform: scaleX(0);
        transition: transform var(--transition-smooth);
    }

    .stat-box:hover::before {
        transform: scaleX(1);
    }

    .stat-box:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-light);
    }

    .stat-box:nth-child(2)::before {
        background: var(--gradient-secondary);
    }

    .stat-box:nth-child(3)::before {
        background: var(--gradient-accent);
    }

    .stat-box:nth-child(4)::before {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }

.stat-box__icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-lg);
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-smooth);
}

.stat-box:nth-child(2) .stat-box__icon {
    background: var(--gradient-secondary);
}

.stat-box:nth-child(3) .stat-box__icon {
    background: var(--gradient-accent);
}

.stat-box:nth-child(4) .stat-box__icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-box:hover .stat-box__icon {
    transform: scale(1.1) rotate(5deg);
}

.stat-box__value,
.stat-box__number {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.stat-box__label {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-light);
}

/* ===================== PROJECT FILTERS ===================== */
.project-filters {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: var(--radius-xl);
    border: 2px solid var(--border-light);
}

.filter-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: #fff;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: all var(--transition-smooth);
}

    .filter-btn i {
        font-size: 16px;
        color: var(--primary-color);
        transition: transform var(--transition-smooth);
    }

    .filter-btn:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
        background: linear-gradient(135deg, rgba(66, 165, 245, 0.05) 0%, rgba(0, 172, 193, 0.08) 100%);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }

        .filter-btn:hover i {
            transform: scale(1.2) rotate(15deg);
        }

    .filter-btn.is-active {
        background: var(--gradient-primary);
        color: #fff;
        border-color: transparent;
        box-shadow: var(--shadow-md);
    }

        .filter-btn.is-active i {
            color: #fff;
        }

/* ===================== PROJECT GRID ===================== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

/* ===================== PROJECT CARD ===================== */
.project-card {
    display: block;
    border-radius: var(--radius-xl);
    overflow: hidden;
    position: relative;
    aspect-ratio: 4 / 3;
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-md);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

    .project-card:hover {
        transform: translateY(-6px) scale(1.02);
        box-shadow: 0 20px 50px rgba(21, 101, 192, 0.25);
    }

/* --- Ảnh nền --- */
.project-card__img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

    .project-card__img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter 0.4s ease;
        filter: brightness(0.85);
    }

.project-card:hover .project-card__img img {
    transform: scale(1.08);
    filter: brightness(0.35) blur(3px);
}

/* --- Gradient mờ dưới (luôn hiển thị nhẹ) --- */
.project-card__img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient( to top, rgba(10, 30, 70, 0.75) 0%, rgba(10, 30, 70, 0.15) 50%, transparent 100% );
    transition: opacity 0.4s ease;
}

.project-card:hover .project-card__img::after {
    opacity: 0;
}

/* --- Overlay toàn màn hover --- */
.project-card__overlay {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 20px;
    transition: background 0.4s ease;
}

.project-card:hover .project-card__overlay {
    background: rgba(10, 35, 80, 0.15);
}

/* --- Content bên dưới (luôn visible nhẹ) --- */
.project-card__content {
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s ease;
    transform: translateY(0);
}

/* --- Category badge --- */
.project-card__category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    margin-bottom: 10px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.35s ease 0.05s, transform 0.35s ease 0.05s;
}

.project-card:hover .project-card__category {
    opacity: 1;
    transform: translateY(0);
}

/* --- Tên dự án --- */
.project-card__name {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 12px;
    text-shadow: 0 1px 4px rgba(0,0,0,0.4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    /* Luôn hiển thị vì nằm trong gradient */
    opacity: 1;
    transform: translateY(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-card__name {
    transform: translateY(-4px);
}

/* --- Meta (location, investor) --- */
.project-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.35s ease 0.1s, transform 0.35s ease 0.1s;
}

.project-card:hover .project-card__meta {
    opacity: 1;
    transform: translateY(0);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-dark);
    font-weight: 500;
}

    .meta-item i {
        font-size: 13px;
        color: var(--primary-light);
        flex-shrink: 0;
    }

/* --- Arrow icon (góc phải dưới) --- */
.project-card__arrow {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    box-shadow: 0 4px 16px rgba(21, 101, 192, 0.5);
    opacity: 0;
    transform: scale(0.6) rotate(-45deg);
    transition: opacity 0.35s ease 0.12s, transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) 0.12s;
    z-index: 3;
}

.project-card:hover .project-card__arrow {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

/* --- Hover icon ở giữa ảnh (fallback nếu có .project-card__hover) --- */
.project-card__hover {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

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

.project-card__icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    transform: scale(0.7);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.project-card:hover .project-card__icon {
    transform: scale(1);
}

/* ===================== PAGINATION ===================== */
.project-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: var(--spacing-3xl);
}

.page-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-width: 44px;
    height: 44px;
    padding: 0 16px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    background: #fff;
    border: 2px solid var(--border-light);
    text-decoration: none;
    transition: all var(--transition-smooth);
    justify-content: center;
}

    .page-btn:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
        background: rgba(66, 165, 245, 0.06);
        transform: translateY(-2px);
    }

    .page-btn.is-active {
        background: var(--gradient-primary);
        color: #fff;
        border-color: transparent;
        box-shadow: var(--shadow-md);
    }

.page-dots {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    font-size: 16px;
    color: var(--text-light);
    letter-spacing: 2px;
}

/* ===================== PROJECT HEADER ===================== */
.project-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-3xl) 0;
}

.project-header__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(66, 165, 245, 0.1) 0%, rgba(0, 172, 193, 0.15) 100%);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-lg);
}

.project-header__title {
    font-size: 48px;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.project-header__subtitle {
    font-size: 18px;
    color: var(--text-medium);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===================== LOAD MORE ===================== */
.project-load-more {
    text-align: center;
    margin-top: var(--spacing-3xl);
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-smooth);
}

    .load-more-btn:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-xl);
    }

    .load-more-btn i {
        transition: transform var(--transition-smooth);
    }

    .load-more-btn:hover i {
        transform: rotate(180deg);
    }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1200px) {
    .project-stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .project-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .stat-box {
        padding: var(--spacing-lg);
    }

    .stat-box__icon {
        width: 54px;
        height: 54px;
        font-size: 24px;
    }

    .stat-box__value,
    .stat-box__number {
        font-size: 26px;
    }

    .project-filters {
        justify-content: flex-start;
    }

    .filter-btn {
        padding: 10px 18px;
        font-size: 13px;
    }

    .project-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    /* Mobile: luôn hiện content không cần hover */
    .project-card__category,
    .project-card__meta,
    .project-card__arrow {
        opacity: 1;
        transform: translateY(0) scale(1) rotate(0deg);
    }

    .project-card__img img {
        filter: brightness(0.5);
    }

    .project-card:hover .project-card__img img {
        transform: none;
        filter: brightness(0.45) blur(2px);
    }

    .project-header__title {
        font-size: 28px;
    }

    .project-header__subtitle {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .project-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .stat-box__value,
    .stat-box__number {
        font-size: 22px;
    }

    .stat-box__label {
        font-size: 11px;
    }

    .project-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .project-card {
        aspect-ratio: 4 / 3;
    }

    .project-card__name {
        font-size: 15px;
    }

    .filter-btn {
        flex: 1;
        min-width: calc(50% - var(--spacing-sm));
        justify-content: center;
    }

    .project-header__title {
        font-size: 24px;
    }
}