/* ============================================
   PHÀO CHỈ VIỆT - Main Stylesheet
   Premium decorative molding landing page
   ============================================ */

/* ---------- Biến CSS ---------- */
:root {
    /* Màu sắc */
    --color-primary: #C8A951;
    --color-primary-dark: #B8860B;
    --color-primary-light: #E8D48B;
    --color-primary-rgb: 200, 169, 81;

    --color-dark: #1a1a2e;
    --color-dark-2: #16213e;
    --color-dark-3: #0f3460;

    --color-white: #ffffff;
    --color-light: #f8f9fa;
    --color-light-2: #eef0f2;
    --color-gray: #6c757d;
    --color-gray-light: #adb5bd;
    --color-gray-dark: #495057;

    --color-success: #28a745;
    --color-danger: #dc3545;

    /* Kiểu chữ */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    /* Kích thước */
    --navbar-height: 80px;
    --container-max: 1200px;
    --radius: 8px;
    --radius-lg: 16px;

    /* Đổ bóng */
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --shadow-gold: 0 4px 20px rgba(200,169,81,0.25);

    /* Hiệu ứng chuyển tiếp */
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ---------- Thiết lập lại và kiểu cơ bản ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-gray-dark);
    background: var(--color-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-dark);
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Các lớp tiện ích ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    box-shadow: var(--shadow-gold);
    transform: translateY(-2px);
}

.btn--outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn--block {
    width: 100%;
    justify-content: center;
}

.required {
    color: var(--color-danger);
}

/* ---------- Kiểu các khu vực ---------- */
.section {
    padding: 100px 0;
}

.section--dark {
    background: var(--color-dark);
}

.section--dark .section__title,
.section--dark .section__desc,
.section--dark .section__tag {
    color: var(--color-white);
}

.section--dark .section__tag {
    color: var(--color-primary);
}

.section--light {
    background: var(--color-light);
}

.section__header {
    text-align: center;
    margin-bottom: 60px;
}

.section__tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section__title {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.section--dark .section__title {
    color: var(--color-white);
}

.section__divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark));
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section__desc {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ---------- Biểu tượng đang tải ---------- */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    grid-column: 1 / -1;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-light-2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-spinner p {
    margin-top: 16px;
    color: var(--color-gray);
    font-size: 14px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    z-index: 1000;
    transition: all var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(26, 26, 46, 0.97);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
}

.navbar__logo i {
    color: var(--color-primary);
    font-size: 1.5rem;
}

.site-logo-image {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.site-logo-image[hidden] {
    display: none;
}

.navbar__list {
    display: flex;
    gap: 8px;
}

.navbar__link {
    display: block;
    padding: 8px 16px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    border-radius: var(--radius);
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.navbar__link:hover,
.navbar__link.active {
    color: var(--color-primary);
}

.navbar__actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar__phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    padding: 8px 16px;
    border: 1px solid rgba(200,169,81,0.4);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.navbar__phone:hover {
    background: rgba(200,169,81,0.15);
    border-color: var(--color-primary);
}

/* Nút menu */
.navbar__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.navbar__toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: all var(--transition);
}

.navbar__toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar__toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar__toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
}

/* Ảnh trình chiếu */
.hero__slider {
    position: absolute;
    inset: 0;
    z-index: 1;
}

.hero__slides {
    display: flex;
    height: 100%;
    transition: transform 0.7s cubic-bezier(0.65, 0, 0.35, 1);
}

.hero__slide {
    min-width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__slide-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-color: var(--color-dark);
}

.hero__slide-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26,26,46,0.85), rgba(22,33,62,0.7));
}

.hero__slide-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    max-width: 800px;
}

.hero__slide-title {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero__slide-title span {
    color: var(--color-primary);
}

.hero__slide-desc {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 36px;
    line-height: 1.8;
}

/* Các nút mũi tên */
.hero__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.3);
    background: rgba(0,0,0,0.3);
    color: var(--color-white);
    font-size: 18px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero__arrow:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.hero__arrow--prev { left: 30px; }
.hero__arrow--next { right: 30px; }

/* Các chấm điều hướng */
.hero__dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 10px;
}

.hero__dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.5);
    background: transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.hero__dot.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.2);
}

/* Nội dung đầu trang dự phòng */
.hero__fallback {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 50%, var(--color-dark-3) 100%);
}

.hero__fallback .hero__overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23C8A951' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
}

.hero__title {
    font-size: 3.5rem;
    color: var(--color-white);
    margin-bottom: 20px;
}

.hero__subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.75);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero__cta {
    font-size: 16px;
    padding: 16px 40px;
}

/* Ẩn nội dung dự phòng khi ảnh trình chiếu đã tải */
.hero--has-slides .hero__fallback {
    display: none;
}

.hero--has-slides .hero__slider {
    position: relative;
    min-height: 100vh;
}

.hero--has-slides .hero__slides,
.hero--has-slides .hero__slide {
    min-height: 100vh;
}

/* ============================================
   ABOUT
   ============================================ */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about__image-wrapper {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-dark), var(--color-dark-2));
}

.about__image-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about__image-placeholder::after {
    content: '\f1ad';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 4rem;
    color: var(--color-primary);
    opacity: 0.3;
}

.about__image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about__image-badge {
    position: absolute;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    padding: 20px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow-gold);
}

.about__badge-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1;
}

.about__badge-text {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
    display: block;
}

.about__heading {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--color-dark);
}

.about__text {
    margin-bottom: 16px;
    color: var(--color-gray);
    line-height: 1.8;
}

.about__stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 36px;
}

.about__stat {
    text-align: center;
    padding: 20px;
    background: var(--color-light);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.about__stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.about__stat-icon {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.about__stat-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-dark);
    line-height: 1;
}

.about__stat-label {
    font-size: 13px;
    color: var(--color-gray);
    margin-top: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   CATEGORIES
   ============================================ */
.categories__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.category-card {
    flex: 1 1 240px;
    width: 100%;
    max-width: 320px;
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
    transition: all var(--transition);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.category-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.category-card:hover .category-card__image {
    transform: scale(1.1);
}

.category-card__placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-dark-2), var(--color-dark-3));
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-card__placeholder i {
    font-size: 3rem;
    color: var(--color-primary);
    opacity: 0.4;
}

.category-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 60%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}

.category-card__name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.category-card__count {
    font-size: 13px;
    color: var(--color-primary);
    margin-top: 4px;
}

/* ============================================
   PRODUCTS
   ============================================ */
.products__filters {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}

.products__filter {
    padding: 10px 24px;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid var(--color-light-2);
    border-radius: 50px;
    background: var(--color-white);
    color: var(--color-gray-dark);
    cursor: pointer;
    transition: all var(--transition);
}

.section--dark .products__filter {
    border-color: rgba(255,255,255,0.15);
    background: rgba(255,255,255,0.05);
    color: rgba(255,255,255,0.7);
}

.products__filter:hover,
.products__filter.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

.products__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 24px;
}

.product-card {
    flex: 1 1 240px;
    width: 100%;
    max-width: 320px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-card__image-wrapper {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-light);
}

.product-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.product-card__placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-light), var(--color-light-2));
}

.product-card__placeholder i {
    font-size: 3rem;
    color: var(--color-gray-light);
}

.product-card__badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.product-card__quick-view {
    position: absolute;
    bottom: -50px;
    left: 0;
    right: 0;
    background: rgba(200,169,81,0.92);
    color: var(--color-white);
    text-align: center;
    padding: 12px;
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: bottom var(--transition);
    border: none;
    cursor: pointer;
    width: 100%;
}

.product-card:hover .product-card__quick-view {
    bottom: 0;
}

.product-card__body {
    padding: 20px;
}

.product-card__category {
    font-size: 12px;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 6px;
}

.product-card__name {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card__price {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.product-card__price-old {
    font-size: 0.85rem;
    color: var(--color-gray-light);
    text-decoration: line-through;
    font-weight: 400;
    margin-left: 8px;
}

.product-card__footer {
    padding: 0 20px 20px;
}

.product-card__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition);
}

.product-card__btn:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.products__pagination {
    text-align: center;
    margin-top: 48px;
}

/* Nút thao tác khu vực nổi bật */
.featured__action {
    text-align: center;
    margin-top: 48px;
}

/* ============================================
   FEATURES / WHY CHOOSE US
   ============================================ */
.features__grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
}

.feature-card {
    flex: 1 1 240px;
    width: 100%;
    max-width: 340px;
    text-align: center;
    padding: 40px 24px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-dark));
    transform: scaleX(0);
    transition: transform var(--transition);
}

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(200,169,81,0.1), rgba(184,134,11,0.05));
    border-radius: 50%;
    font-size: 2rem;
    color: var(--color-primary);
    transition: all var(--transition);
}

.feature-card:hover .feature-card__icon {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    transform: scale(1.1);
}

.feature-card__title {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--color-dark);
}

.feature-card__text {
    font-size: 0.95rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ============================================
   CONTACT
   ============================================ */
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact__form {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(5px);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-white);
}

.form-label i {
    color: var(--color-primary);
    margin-right: 6px;
    width: 16px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-body);
    font-size: 15px;
    border: 2px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.06);
    color: var(--color-white);
    transition: all var(--transition);
}

.form-input::placeholder {
    color: rgba(255,255,255,0.35);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255,255,255,0.1);
    box-shadow: 0 0 0 3px rgba(200,169,81,0.15);
}

.form-input.error {
    border-color: var(--color-danger);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-error {
    display: block;
    font-size: 12px;
    color: var(--color-danger);
    margin-top: 6px;
    min-height: 18px;
}

.form-message {
    margin-top: 20px;
    padding: 14px;
    border-radius: var(--radius);
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background: rgba(40,167,69,0.15);
    color: var(--color-success);
    border: 1px solid rgba(40,167,69,0.3);
}

.form-message.error {
    display: block;
    background: rgba(220,53,69,0.15);
    color: var(--color-danger);
    border: 1px solid rgba(220,53,69,0.3);
}

/* Thông tin liên hệ */
.contact__info-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 40px;
    backdrop-filter: blur(5px);
}

.contact__info-item {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.contact__info-item:last-child {
    border-bottom: none;
}

.contact__info-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 1rem;
    flex-shrink: 0;
}

.contact__info-item h4 {
    font-size: 1rem;
    color: var(--color-white);
    margin-bottom: 4px;
}

.contact__info-item p {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
}

.contact__info-item a {
    color: var(--color-primary);
}

.contact__info-item a:hover {
    color: var(--color-primary-light);
}

/* Bản đồ */
.contact__map {
    margin-top: 24px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 200px;
}

.contact__map-placeholder {
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: rgba(255,255,255,0.4);
}

.contact__map-placeholder i {
    font-size: 2.5rem;
    color: var(--color-primary);
    opacity: 0.5;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--color-dark);
    padding: 80px 0 0;
    border-top: 1px solid rgba(200,169,81,0.2);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 60px;
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.footer__logo i {
    color: var(--color-primary);
}

.footer__logo .site-logo-image {
    width: 32px;
    height: 32px;
}

.footer__about {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

.footer__social {
    display: flex;
    gap: 12px;
}

.footer__social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.6);
    transition: all var(--transition);
}

.footer__social-link:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

.footer__heading {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 12px;
}

.footer__heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-primary);
}

.footer__links li {
    margin-bottom: 10px;
}

.footer__links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer__links a i {
    color: var(--color-primary);
    font-size: 12px;
    transition: transform var(--transition);
}

.footer__links a:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

.footer__links a:hover i {
    transform: translateX(3px);
}

.footer__contact li {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
}

.footer__contact i {
    color: var(--color-primary);
    width: 16px;
    text-align: center;
    margin-top: 4px;
}

.footer__contact a {
    color: rgba(255,255,255,0.6);
}

.footer__contact a:hover {
    color: var(--color-primary);
}

.footer__bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 24px 0;
    text-align: center;
}

.footer__bottom p {
    color: rgba(255,255,255,0.4);
    font-size: 0.9rem;
}

/* ============================================
   MODAL
   ============================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(4px);
}

.modal__content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow-y: auto;
    transform: translateY(30px) scale(0.95);
    transition: transform var(--transition);
    box-shadow: var(--shadow-lg);
}

.modal.active .modal__content {
    transform: translateY(0) scale(1);
}

.modal__close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--color-light);
    color: var(--color-dark);
    font-size: 18px;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.modal__close:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

.modal__body {
    padding: 0;
}

/* Hộp thoại chi tiết sản phẩm */
.modal__product {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.modal__product-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--color-light);
}

.modal__product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal__product-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-light), var(--color-light-2));
}

.modal__product-image-placeholder i {
    font-size: 4rem;
    color: var(--color-gray-light);
}

.modal__product-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
}

.modal__product-category {
    font-size: 13px;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    margin-bottom: 8px;
}

.modal__product-name {
    font-size: 1.6rem;
    color: var(--color-dark);
    margin-bottom: 16px;
}

.modal__product-price {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-primary-dark);
    margin-bottom: 20px;
}

.modal__product-desc {
    color: var(--color-gray);
    line-height: 1.8;
    margin-bottom: 24px;
    flex-grow: 1;
}

.modal__product-specs {
    border-top: 1px solid var(--color-light-2);
    padding-top: 20px;
    margin-bottom: 24px;
}

.modal__product-spec {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-light);
    font-size: 0.95rem;
}

.modal__product-spec-label {
    color: var(--color-gray);
}

.modal__product-spec-value {
    font-weight: 600;
    color: var(--color-dark);
}

.modal__product-actions {
    display: flex;
    gap: 12px;
}

/* ============================================
   SCROLL TO TOP
   ============================================ */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    border: none;
    font-size: 20px;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    box-shadow: var(--shadow-gold);
    display: flex;
    align-items: center;
    justify-content: center;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(200,169,81,0.4);
}

/* ============================================
   ANIMATIONS
   ============================================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-fade-up {
    animation: fadeUp 0.8s ease forwards;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hiệu ứng xuất hiện lần lượt */
.animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .navbar__menu {
        position: fixed;
        top: 0;
        right: 0;
        width: min(320px, 100vw);
        height: 100vh;
        height: 100dvh;
        padding: calc(var(--navbar-height) + 24px) 24px 24px;
        background: var(--color-dark);
        transform: translateX(100%);
        transition: transform var(--transition);
        box-shadow: -5px 0 30px rgba(0,0,0,0.3);
        overflow-y: auto;
        z-index: 1000;
    }

    .navbar__menu.active {
        transform: translateX(0);
    }

    .navbar__list {
        flex-direction: column;
        gap: 4px;
    }

    .navbar__link {
        padding: 12px 14px;
    }

    .navbar__toggle {
        display: flex;
    }

    .navbar__actions {
        gap: 8px;
    }

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

    .about__grid {
        gap: 40px;
    }

    .section__title {
        font-size: 2rem;
    }

    .hero__slide-title,
    .hero__title {
        font-size: 2.8rem;
    }

    .modal__product {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    :root {
        --navbar-height: 70px;
    }

    .section {
        padding: 70px 0;
    }

    /* Thanh điều hướng trên điện thoại */
    .navbar__menu {
        padding-top: calc(var(--navbar-height) + 24px);
    }

    .navbar__link {
        font-size: 15px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .navbar__phone span {
        display: none;
    }

    .navbar__phone {
        padding: 10px;
        border: none;
    }

    /* Khu vực đầu trang */
    .hero__slide-title,
    .hero__title {
        font-size: 2rem;
    }

    .hero__slide-desc,
    .hero__subtitle {
        font-size: 1rem;
    }

    .hero__arrow {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    .hero__arrow--prev { left: 15px; }
    .hero__arrow--next { right: 15px; }

    /* Phần giới thiệu */
    .about__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about__heading {
        font-size: 1.5rem;
    }

    /* Căn giữa thẻ sản phẩm và cam kết khi hàng cuối chưa đủ thẻ. */
    .products__grid,
    .features__grid {
        gap: 16px;
    }

    /* Phần liên hệ */
    .contact__grid {
        grid-template-columns: 1fr;
    }

    .contact__form {
        padding: 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Chân trang */
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .section__header {
        margin-bottom: 40px;
    }
}

@media (max-width: 480px) {
    .container {
        padding-right: 16px;
        padding-left: 16px;
    }

    .section {
        padding: 50px 0;
    }

    .section__title {
        font-size: 1.6rem;
    }

    .hero__slide-title,
    .hero__title {
        font-size: 1.6rem;
    }

    .about__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .about__stat {
        padding: 16px 12px;
    }

    .about__stat-number {
        font-size: 1.5rem;
    }

    .contact__form {
        padding: 20px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 13px;
    }

    .categories__grid {
        gap: 12px;
    }

    .category-card,
    .product-card,
    .feature-card {
        flex-basis: 100%;
        max-width: 360px;
    }

    .modal__content {
        width: calc(100% - 20px);
        max-height: calc(100dvh - 20px);
    }

    .modal__product-info {
        padding: 24px 20px;
    }

    .modal__product-actions {
        flex-wrap: wrap;
    }

    .footer {
        padding-top: 56px;
    }

    .footer__grid {
        padding-bottom: 36px;
    }

    .footer__bottom p {
        padding: 0 16px;
        overflow-wrap: anywhere;
    }

    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 360px) {
    .navbar__logo {
        gap: 6px;
        font-size: 1.1rem;
        letter-spacing: 1px;
    }

    .site-logo-image {
        width: 30px;
        height: 30px;
    }

    .navbar__phone {
        padding: 8px;
    }

    .navbar__actions {
        gap: 4px;
    }

    .hero__arrow--prev { left: 8px; }
    .hero__arrow--next { right: 8px; }
}