/* assets/css/style.css - Design System cho Website Bán Điện Thoại */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent: #f43f5e;
    --success: #10b981;
    --warning: #f59e0b;
    --dark: #0f172a;
    --dark-muted: #64748b;
    --border-color: #e2e8f0;
    --bg-light: #f8fafc;
    --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
    --card-hover-shadow: 0 12px 30px -4px rgba(37, 99, 235, 0.16);
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html, body {
    overflow-x: hidden;
    max-width: 100%;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-light);
    color: #1e293b;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Topbar & Navbar */
.top-bar {
    background: #0f172a;
    color: #e2e8f0;
    font-size: 0.85rem;
    padding: 7px 0;
}

.top-bar strong {
    color: #ffffff;
}

.top-bar a {
    color: #e2e8f0;
    text-decoration: none;
    transition: var(--transition);
}

.top-bar a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.top-bar .text-primary {
    color: #60a5fa !important;
}

.top-bar .text-danger {
    color: #f87171 !important;
}

.main-header {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.brand-logo {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.5px;
}

.brand-logo span {
    color: var(--dark);
}

.search-bar-wrap {
    position: relative;
    max-width: 550px;
    width: 100%;
}

.search-input {
    border-radius: 50px;
    padding: 10px 48px 10px 20px;
    border: 1.5px solid var(--border-color);
    background-color: #f1f5f9;
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-input:focus {
    background-color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.search-btn {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    background: var(--primary);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-hover);
}

.header-action-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--dark);
    padding: 8px 14px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
}

.header-action-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.header-action-icon {
    position: relative;
    font-size: 1.3rem;
    color: var(--primary);
}

.badge-count {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 50px;
}

/* Navigation Categories Bar */
.cat-nav-bar {
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.nav-cat-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: #334155;
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
}

.nav-cat-link:hover, .nav-cat-link.active {
    color: var(--primary);
    background-color: var(--primary-light);
}

/* Hero Carousel & Promotion Banners */
.hero-slider-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--card-shadow);
}

.hero-slide {
    height: 380px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    color: white;
    padding: 40px;
    position: relative;
}

.hero-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.2) 100%);
}

.hero-slide-content {
    position: relative;
    z-index: 2;
    max-width: 500px;
}

.hero-slide-content h1,
.hero-slide-content h2,
.hero-slide-content h3,
.hero-slide-content h4 {
    color: #ffffff !important;
}

.hero-slide-content p {
    color: #f1f5f9 !important;
}

.banner-mini-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    height: 180px;
    display: flex;
    align-items: center;
    padding: 20px;
    color: #ffffff !important;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    text-decoration: none !important;
}

.banner-mini-card h5,
.banner-mini-card p {
    color: #ffffff !important;
}

.banner-mini-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-hover-shadow);
    color: #ffffff !important;
}

/* Product Card */
.product-card {
    background: #ffffff;
    border: 1px solid #f1f5f9;
    border-radius: var(--radius-md);
    padding: 16px;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-hover-shadow);
    border-color: #cbd5e1;
}

.product-badge-discount {
    position: absolute;
    top: 12px;
    left: 12px;
    background: linear-gradient(135deg, #ef4444, #f43f5e);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    z-index: 2;
}

.product-img-wrap {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    overflow: hidden;
}

.product-img-wrap img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    transition: transform 0.35s ease;
}

.product-card:hover .product-img-wrap img {
    transform: scale(1.08);
}

.product-brand {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--dark-muted);
    margin-bottom: 4px;
}

.product-title {
    font-size: 0.96rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 2.7rem;
    text-decoration: none;
}

.product-title:hover {
    color: var(--primary);
}

.product-specs-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 12px;
}

.spec-chip {
    font-size: 0.72rem;
    background: #f1f5f9;
    color: #475569;
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 500;
}

.product-price-box {
    margin-top: auto;
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 12px;
}

.current-price {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--accent);
}

.old-price {
    font-size: 0.85rem;
    color: #94a3b8;
    text-decoration: line-through;
}

.product-card-actions {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

.btn-add-cart {
    background-color: var(--primary-light);
    color: var(--primary);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.88rem;
    padding: 8px 12px;
    transition: var(--transition);
    text-align: center;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.btn-add-cart:hover {
    background-color: var(--primary);
    color: white;
}

/* Feature Box */
.feature-box {
    background: white;
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.feature-box:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-hover-shadow);
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

/* Footer */
footer {
    background: #0f172a;
    color: #cbd5e1;
    margin-top: auto;
}

footer p {
    color: #cbd5e1;
}

footer .text-muted {
    color: #94a3b8 !important;
}

.footer-title {
    color: #ffffff;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 18px;
    letter-spacing: -0.2px;
}

.footer-link {
    color: #cbd5e1;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    font-size: 0.92rem;
    transition: var(--transition);
}

.footer-link:hover {
    color: #ffffff;
    padding-left: 5px;
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding: 20px 0;
    font-size: 0.88rem;
    color: #94a3b8 !important;
}

.footer-bottom strong {
    color: #ffffff;
}

/* ========================================================
   MOBILE & RESPONSIVE DESIGN SYSTEM (Tối ưu giao diện điện thoại)
   ======================================================== */

/* Mobile Bottom Fixed Navigation Bar */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    height: 52px;
    background: #ffffff;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    padding: 0;
    margin: 0;
    z-index: 1040;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
    box-sizing: border-box;
}

.mobile-nav-item {
    flex: 1 1 0;
    width: 20%;
    max-width: 20%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #64748b;
    padding: 3px 0;
    margin: 0;
    transition: var(--transition);
    box-sizing: border-box;
}

.mobile-nav-icon-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 20px;
}

.mobile-nav-item i {
    font-size: 1.05rem;
    line-height: 1;
    margin-bottom: 2px;
    transition: var(--transition);
}

.mobile-nav-item span {
    font-size: 0.65rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 95%;
    display: block;
}

.mobile-nav-item.active, 
.mobile-nav-item:hover {
    color: var(--primary);
}

.mobile-nav-item.active i {
    transform: translateY(-1px);
}

.mobile-nav-badge {
    position: absolute;
    top: -5px;
    right: -10px;
    background: var(--accent);
    color: #ffffff;
    font-size: 0.58rem;
    font-weight: 700;
    padding: 0 4px;
    min-width: 14px;
    height: 14px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    border: 1px solid #ffffff;
}

/* Horizontal scrollable category / brand chips */
.mobile-cat-scroll {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    white-space: nowrap;
    padding: 6px 0 8px 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.mobile-cat-scroll::-webkit-scrollbar {
    display: none;
}

.mobile-cat-chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: #f1f5f9;
    color: #334155;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid #e2e8f0;
    flex-shrink: 0;
}

.mobile-cat-chip:hover, 
.mobile-cat-chip.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* Tablet & Mobile Tweaks (< 992px) */
@media (max-width: 991.98px) {
    .hero-slider-card {
        margin-bottom: 1rem;
    }
}

/* Mobile Screens (< 768px) */
@media (max-width: 767.98px) {
    body {
        padding-bottom: 58px; /* Dành chỗ cho thanh điều hướng đáy 52px */
    }

    /* Container Spacing */
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }

    /* Top Bar */
    .top-bar {
        font-size: 0.75rem;
        padding: 5px 0;
    }
    .top-bar .gap-3 {
        gap: 8px !important;
    }

    /* Header */
    .main-header {
        padding-top: 8px !important;
        padding-bottom: 8px !important;
    }

    .brand-logo {
        font-size: 1.35rem;
        gap: 6px;
    }

    .header-action-btn {
        padding: 6px 8px;
        gap: 6px;
    }

    .header-action-icon {
        font-size: 1.15rem;
    }

    .search-bar-wrap {
        max-width: 100%;
        margin: 0 !important;
    }

    .search-input {
        padding: 8px 40px 8px 14px;
        font-size: 0.88rem;
    }

    .search-btn {
        width: 30px;
        height: 30px;
        right: 4px;
        font-size: 0.8rem;
    }

    /* Hero Slide */
    .hero-slide {
        height: 220px;
        padding: 16px;
    }

    .hero-slide-content h1,
    .hero-slide-content h2,
    .hero-slide-content h3 {
        font-size: 1.25rem !important;
        margin-bottom: 6px !important;
        line-height: 1.25;
    }

    .hero-slide-content p {
        font-size: 0.8rem !important;
        margin-bottom: 12px !important;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .hero-slide-content .btn {
        padding: 6px 14px !important;
        font-size: 0.82rem !important;
    }

    /* Mini Banners */
    .banner-mini-card {
        height: 105px;
        padding: 12px;
    }

    .banner-mini-card h5 {
        font-size: 0.95rem !important;
        margin-bottom: 2px !important;
    }

    .banner-mini-card p {
        font-size: 0.75rem !important;
        margin-bottom: 6px !important;
    }

    .banner-mini-card .btn {
        padding: 2px 10px !important;
        font-size: 0.72rem !important;
    }

    /* Feature Boxes (Giá trị cam kết) */
    .feature-box {
        padding: 10px 10px;
        gap: 8px;
    }

    .feature-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
        border-radius: 8px;
    }

    .feature-box h6 {
        font-size: 0.8rem;
    }

    .feature-box small {
        font-size: 0.68rem;
    }

    /* Product Cards in Grid (2 cards/row) */
    .product-card {
        padding: 10px;
        border-radius: 10px;
    }

    .product-img-wrap {
        height: 130px;
        margin-bottom: 8px;
    }

    .product-badge-discount {
        top: 6px;
        left: 6px;
        font-size: 0.68rem;
        padding: 2px 6px;
    }

    .product-brand {
        font-size: 0.68rem;
        margin-bottom: 2px;
    }

    .product-title {
        font-size: 0.82rem;
        height: 2.2rem;
        line-height: 1.3;
        margin-bottom: 6px;
    }

    .product-specs-chips {
        gap: 3px;
        margin-bottom: 8px;
    }

    .spec-chip {
        font-size: 0.65rem;
        padding: 1px 5px;
    }

    /* Ẩn chip thứ 3 trên mobile hẹp để card đều đẹp */
    .product-specs-chips .spec-chip:nth-child(n+3) {
        display: none;
    }

    .product-price-box {
        margin-bottom: 8px;
        gap: 4px;
        flex-wrap: wrap;
    }

    .current-price {
        font-size: 0.95rem;
    }

    .old-price {
        font-size: 0.72rem;
    }

    .product-card-actions {
        gap: 4px;
    }

    .btn-add-cart {
        font-size: 0.75rem;
        padding: 6px 6px;
        gap: 3px;
    }

    .product-card-actions .btn-outline-secondary {
        padding: 4px 8px;
        font-size: 0.78rem;
    }

    /* Product Detail Page Mobile */
    .product-detail-img-box {
        min-height: 240px !important;
        padding: 1rem !important;
    }

    /* Cart & Checkout Mobile */
    .table-responsive {
        font-size: 0.88rem;
    }

    /* Footer Mobile */
    footer {
        padding-top: 2rem !important;
        margin-top: 2rem !important;
    }

    .footer-title {
        margin-bottom: 10px;
        font-size: 0.95rem;
    }

    .footer-link {
        font-size: 0.85rem;
        margin-bottom: 6px;
    }

    .footer-bottom {
        padding: 14px 0;
        font-size: 0.78rem;
    }
}