/* ==========================================================================
   CSS CHO LANDING PAGE TRANH DÁN TƯỜNG ZIMBA PREMIUM - 2026
   Phong cách: Sang trọng, Sạch sẽ, Cao cấp, Tin cậy
   Bảng màu chủ đạo: Trắng, Kem (#F9F6F0), Vàng đồng (#C5A880), Đen/Xám than (#1C1C1C)
   ========================================================================== */

/* 1. KHỞI TẠO BIẾN CSS & RESET */
:root {
    --primary-color: #C5A880; /* Vàng đồng sang trọng */
    --primary-hover: #B59870;
    --dark-charcoal: #1C1C1C; /* Đen/Xám than cao cấp */
    --bg-cream: #F9F6F0;      /* Kem nhạt tinh tế */
    --bg-white: #FFFFFF;
    --text-dark: #2A2A2A;     /* Chữ đen dịu mắt */
    --text-muted: #666666;
    --text-light: #FFFFFF;
    --border-color: #EAE5DB;  /* Viền kem mảnh */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Montserrat', sans-serif;
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-luxury: 0 15px 40px rgba(28, 28, 28, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    color: var(--text-dark);
    font-family: var(--font-body);
}

body {
    background-color: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* THIẾT LẬP PHẦN KHUNG CHUNG */
.container {
    width: 100%;
    margin-right: auto;
    margin-left: auto;
    padding-right: 20px;
    padding-left: 20px;
}

/* Responsive container widths */
@media (min-width: 576px) { .container { max-width: 540px; } }
@media (min-width: 768px) { .container { max-width: 720px; } }
@media (min-width: 992px) { .container { max-width: 960px; } }
@media (min-width: 1200px) { .container { max-width: 1140px; } }

/* CÁC PHẦN TIÊU ĐỀ & CHỮ SANG TRỌNG */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--dark-charcoal);
    line-height: 1.2;
}

p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

strong {
    color: var(--dark-charcoal);
    font-weight: 600;
}

.text-center { text-align: center; }

.section-header {
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.sub-title {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.2rem;
    letter-spacing: -0.5px;
    color: var(--dark-charcoal);
}

@media (max-width: 768px) {
    .section-title { font-size: 1.8rem; }
}

.title-divider {
    width: 60px;
    height: 1px;
    background-color: var(--primary-color);
    margin: 15px auto 20px;
}

.section-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* 2. CÁC NÚT (BUTTONS) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    border-radius: 0; /* Bo góc vuông vắn tạo cảm giác sang trọng cổ điển */
    text-decoration: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    border: 1px solid transparent;
    outline: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--dark-charcoal);
    color: var(--text-light);
}

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

.btn-secondary {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.btn-secondary:hover {
    background-color: #A3855B;
    color: var(--text-light);
}

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

.btn-primary-outline:hover {
    background-color: var(--dark-charcoal);
    color: var(--text-light);
}

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

.btn-secondary-outline:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
}

.btn-block {
    display: flex;
    width: 100%;
}

.hidden {
    display: none !important;
}

/* 3. HEADER & MENU */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.main-header.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-subtle);
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
}

.logo {
    text-decoration: none;
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--dark-charcoal);
    line-height: 1;
}

.logo-sub {
    font-family: var(--font-body);
    font-size: 0.55rem;
    letter-spacing: 4px;
    color: var(--primary-color);
    font-weight: 500;
    margin-top: 2px;
}

.nav-menu ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dark);
    transition: var(--transition-smooth);
    padding: 8px 0;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--primary-color);
    transition: var(--transition-smooth);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Menu Toggle for Mobile */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--dark-charcoal);
    position: relative;
    transition: var(--transition-smooth);
}

.hamburger::before, .hamburger::after {
    content: '';
    width: 24px;
    height: 2px;
    background-color: var(--dark-charcoal);
    position: absolute;
    left: 0;
    transition: var(--transition-smooth);
}

.hamburger::before { top: -8px; }
.hamburger::after { bottom: -8px; }

/* Hamburger open state */
.menu-toggle.open .hamburger {
    background-color: transparent;
}
.menu-toggle.open .hamburger::before {
    transform: translateY(8px) rotate(45deg);
}
.menu-toggle.open .hamburger::after {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 991px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 75px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 75px);
        background-color: var(--bg-white);
        transition: var(--transition-smooth);
        padding: 40px;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.open {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 30px;
        align-items: center;
    }
    
    .nav-link {
        font-size: 1.1rem;
    }
    
    .header-cta {
        display: none;
    }
}

/* 4. HERO SECTION */
.hero-section {
    padding-top: 150px;
    padding-bottom: 80px;
    background-color: var(--bg-cream);
    position: relative;
    overflow: hidden;
}

.hero-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

@media (max-width: 991px) {
    .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-tag {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--dark-charcoal);
    margin-bottom: 25px;
}

@media (max-width: 576px) {
    .hero-title { font-size: 2rem; }
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 550px;
}

@media (max-width: 991px) {
    .hero-desc { margin-left: auto; margin-right: auto; }
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

@media (max-width: 991px) {
    .hero-buttons { justify-content: center; }
}

@media (max-width: 576px) {
    .hero-buttons .btn { width: 100%; }
}

.hero-image {
    position: relative;
    z-index: 2;
}

.image-container {
    position: relative;
    padding-bottom: 66.66%; /* Tỉ lệ 3:2 sang trọng */
    height: 0;
    overflow: hidden;
    box-shadow: var(--shadow-luxury);
    border: 8px solid var(--bg-white);
}

.hero-img-element {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: scale 3s cubic-bezier(0.16, 1, 0.3, 1);
}

.image-container:hover .hero-img-element {
    scale: 1.05;
}

.image-overlay-text {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background-color: rgba(28, 28, 28, 0.85);
    color: var(--text-light);
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 6px 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Background Shapes */
.hero-bg-shapes div {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(197,168,128,0.08) 0%, rgba(255,255,255,0) 70%);
    z-index: 1;
}

.shape-circle-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    right: -100px;
}

.shape-circle-2 {
    width: 400px;
    height: 400px;
    bottom: -150px;
    left: -100px;
}

/* 5. BENEFITS SECTION */
.benefits-section {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
}

.benefit-card {
    background-color: var(--bg-cream);
    padding: 40px 30px;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.benefit-card:hover {
    transform: translateY(-5px);
    background-color: var(--bg-white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-subtle);
}

.benefit-icon {
    width: 50px;
    height: 50px;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.benefit-icon svg {
    width: 100%;
    height: 100%;
}

.benefit-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.benefit-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 6. CATALOG SECTION - NHÓM MẪU */
.catalog-section {
    padding: 80px 0;
    background-color: var(--bg-cream);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

@media (max-width: 768px) {
    .catalog-grid {
        grid-template-columns: 1fr;
    }
}

.catalog-card {
    background-color: var(--bg-white);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
    overflow: hidden;
}

.catalog-card:hover {
    box-shadow: var(--shadow-luxury);
    transform: translateY(-5px);
}

.catalog-image {
    position: relative;
    padding-bottom: 56.25%; /* Tỉ lệ 16:9 hiện đại */
    height: 0;
    overflow: hidden;
}

.catalog-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.5s ease;
}

.catalog-card:hover .catalog-image img {
    transform: scale(1.05);
}

.catalog-tag {
    position: absolute;
    top: 15px;
    left: 15px;
    background-color: rgba(28, 28, 28, 0.9);
    color: var(--text-light);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 5px 12px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.catalog-info {
    padding: 30px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.catalog-title {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.catalog-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 25px;
    flex-grow: 1;
}

.catalog-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-smooth);
    margin-top: auto;
}

.catalog-link svg {
    width: 14px;
    height: 14px;
    transition: var(--transition-smooth);
}

.catalog-card:hover .catalog-link {
    color: var(--dark-charcoal);
}

.catalog-card:hover .catalog-link svg {
    transform: translateX(5px);
}

/* 7. PRICING SECTION - BÁO GIÁ */
.pricing-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.pricing-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 991px) {
    .pricing-wrapper {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

.pricing-info {
    max-width: 650px;
}

.pricing-headline {
    font-size: 1.6rem;
    font-weight: 500;
    margin: 20px 0;
    font-family: var(--font-heading);
}

.price-highlight {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 2px;
}

.pricing-method h4 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.formula-box {
    background-color: var(--bg-cream);
    padding: 15px 20px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--dark-charcoal);
    border-left: 4px solid var(--primary-color);
    margin-bottom: 25px;
}

.example-box {
    border: 1px solid var(--border-color);
    padding: 25px;
    margin-bottom: 25px;
    position: relative;
}

.example-badge {
    position: absolute;
    top: -10px;
    left: 20px;
    background-color: var(--primary-color);
    color: var(--text-light);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 3px 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.example-box p {
    margin-bottom: 15px;
    font-weight: 500;
    color: var(--dark-charcoal);
}

.example-box ul {
    list-style-type: none;
}

.example-box ul li {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding-left: 20px;
    position: relative;
}

.example-box ul li::before {
    content: '▪';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.price-note {
    font-size: 0.8rem;
    font-style: italic;
}

/* Calculator Card Styling */
.pricing-calculator-card {
    background-color: var(--bg-cream);
    padding: 40px;
    box-shadow: var(--shadow-luxury);
    border: 1px solid var(--border-color);
}

@media (max-width: 576px) {
    .pricing-calculator-card { padding: 30px 20px; }
}

.calculator-header {
    text-align: center;
    margin-bottom: 30px;
}

.calculator-header h3 {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.calculator-header p {
    font-size: 0.8rem;
}

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

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    color: var(--dark-charcoal);
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    outline: none;
    transition: var(--transition-smooth);
    border-radius: 0;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
}

/* Calculator Results Box */
.calculator-result {
    margin-top: 30px;
}

.result-divider {
    height: 1px;
    background-color: var(--border-color);
    margin-bottom: 20px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.result-row strong {
    font-size: 1.1rem;
    color: var(--dark-charcoal);
}

.result-row.total-row {
    font-size: 1rem;
    color: var(--dark-charcoal);
    margin-top: 20px;
}

.result-row.total-row strong {
    font-size: 1.8rem;
    color: var(--primary-color);
    border-bottom: 2px double var(--primary-color);
}

.result-shipping-info {
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-color);
    margin: 20px 0;
}

#calculator-cta {
    margin-top: 10px;
}

/* 8. PROCESS SECTION - QUY TRÌNH */
.process-section {
    padding: 80px 0;
    background-color: var(--bg-cream);
}

.process-timeline {
    position: relative;
    max-width: 900px;
    margin: 60px auto 0;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 45px;
    width: 1px;
    height: 100%;
    background-color: var(--primary-color);
    opacity: 0.4;
}

.process-item {
    position: relative;
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
}

.process-item:last-child {
    margin-bottom: 0;
}

.process-number {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    width: 90px;
    height: 90px;
    background-color: var(--dark-charcoal);
    color: var(--primary-color);
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid var(--bg-cream);
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.process-item:hover .process-number {
    background-color: var(--primary-color);
    color: var(--text-light);
    scale: 1.05;
}

.process-content {
    padding-top: 15px;
}

.process-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.process-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 650px;
}

@media (max-width: 576px) {
    .process-timeline::before { left: 30px; }
    .process-item { gap: 20px; }
    .process-number {
        width: 60px;
        height: 60px;
        font-size: 1.3rem;
    }
    .process-content { padding-top: 8px; }
    .process-title { font-size: 1.2rem; }
}

/* 9. CUSTOM DESIGN SECTION - THIẾT KẾ RIÊNG */
.custom-design-section {
    padding: 100px 0;
    background-color: var(--bg-white);
}

.custom-design-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

@media (max-width: 991px) {
    .custom-design-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .custom-design-image {
        order: 2;
    }
}

.custom-design-image img {
    width: 100%;
    height: auto;
    box-shadow: var(--shadow-luxury);
    border: 1px solid var(--border-color);
}

.custom-desc {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.custom-sub-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 35px;
}

/* 10. DELIVERY SECTION - THI CÔNG & VẬN CHUYỂN */
.delivery-section {
    padding: 80px 0;
    background-color: var(--bg-cream);
}

.delivery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.delivery-card {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-top: 4px solid var(--primary-color);
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.delivery-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-luxury);
}

.delivery-card-icon {
    width: 45px;
    height: 45px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.delivery-card-icon svg {
    width: 100%;
    height: 100%;
}

.delivery-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.delivery-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* 11. FAQ SECTION */
.faq-section {
    padding: 80px 0;
    background-color: var(--bg-white);
}

.faq-list {
    max-width: 800px;
    margin: 40px auto 0;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: none;
    border: none;
    padding: 20px 0;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark-charcoal);
    outline: none;
    transition: var(--transition-smooth);
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon-arrow {
    width: 16px;
    height: 16px;
    position: relative;
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.faq-icon-arrow::before, .faq-icon-arrow::after {
    content: '';
    position: absolute;
    background-color: var(--dark-charcoal);
    transition: var(--transition-smooth);
}

/* Create simple plus icon */
.faq-icon-arrow::before {
    top: 7px;
    left: 0;
    width: 16px;
    height: 2px;
}

.faq-icon-arrow::after {
    top: 0;
    left: 7px;
    width: 2px;
    height: 16px;
}

/* FAQ Active State */
.faq-item.active .faq-icon-arrow::after {
    transform: rotate(90deg);
    opacity: 0;
}

.faq-item.active .faq-icon-arrow::before {
    transform: rotate(180deg);
    background-color: var(--primary-color);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
}

.faq-item.active .faq-answer {
    max-height: 500px; /* An arbitrary large enough value */
    padding-bottom: 20px;
}

.faq-answer p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* 12. CONTACT SECTION & FORM */
.contact-section {
    padding: 100px 0;
    background-color: var(--bg-cream);
    position: relative;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: flex-start;
}

@media (max-width: 991px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

.contact-info-block {
    max-width: 500px;
}

.contact-intro {
    font-size: 1rem;
    margin-bottom: 35px;
}

.contact-details {
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-item h4 {
    font-family: var(--font-body);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.contact-item p {
    font-size: 1.05rem;
    color: var(--dark-charcoal);
    font-weight: 500;
}

.contact-link-text {
    text-decoration: none;
    color: var(--dark-charcoal);
    transition: var(--transition-smooth);
}

.contact-link-text:hover {
    color: var(--primary-color);
}

.quick-chat-buttons {
    margin-top: 30px;
}

.btn-chat {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 30px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    color: var(--text-light);
    border-radius: 0;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
    width: 100%;
}

.btn-zalo {
    background-color: #0068FF; /* Màu xanh Zalo */
}

.btn-zalo:hover {
    background-color: #0056D2;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 104, 255, 0.3);
}

/* Contact Form Card */
.contact-form-card {
    background-color: var(--bg-white);
    padding: 45px;
    box-shadow: var(--shadow-luxury);
    border: 1px solid var(--border-color);
}

@media (max-width: 576px) {
    .contact-form-card { padding: 30px 20px; }
}

.form-header {
    margin-bottom: 35px;
}

.form-header h3 {
    font-size: 1.6rem;
    margin-bottom: 10px;
}

.form-header p {
    font-size: 0.8rem;
}

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

@media (max-width: 576px) {
    .form-group-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
}

.form-success-alert {
    text-align: center;
    padding: 40px 20px;
    animation: fadeIn 0.5s ease-out;
}

.success-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(197, 168, 128, 0.1);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    margin: 0 auto 25px;
}

.form-success-alert h4 {
    font-size: 1.6rem;
    margin-bottom: 15px;
}

.form-success-alert p {
    font-size: 0.9rem;
    line-height: 1.7;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* 13. FOOTER */
.main-footer {
    background-color: var(--dark-charcoal);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 80px;
    border-top: 2px solid var(--primary-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 1fr;
    gap: 50px;
    margin-bottom: 60px;
}

@media (max-width: 991px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.footer-col-brand .logo {
    margin-bottom: 20px;
}

.footer-col-brand .logo-text {
    color: var(--text-light);
}

.brand-desc {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-grid h4 {
    color: var(--text-light);
    font-family: var(--font-body);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 25px;
}

.footer-col-links ul {
    list-style: none;
}

.footer-col-links ul li {
    margin-bottom: 12px;
}

.footer-col-links ul li a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.footer-col-links ul li a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-col-contact p {
    font-size: 0.85rem;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col-contact p a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.footer-bottom {
    background-color: #121212;
    padding: 25px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 768px) {
    .footer-bottom-wrapper {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}

.footer-credit {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* 14. NÚT LIÊN HỆ NỔI (FLOAT ACTIONS) */
.float-contact-wrapper {
    position: fixed;
    bottom: 30px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-btn {
    display: flex;
    align-items: center;
    text-decoration: none;
    height: 48px;
    background-color: var(--bg-white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    border-radius: 24px;
    overflow: hidden;
    max-width: 48px; /* Ban đầu chỉ hiện icon tròn */
    transition: max-width 0.5s ease-in-out, background-color 0.3s;
}

.float-btn:hover {
    max-width: 280px; /* Hover hiện label chữ */
}

.float-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--text-light);
    flex-shrink: 0;
}

.float-label {
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
    padding: 0 20px 0 10px;
    white-space: nowrap;
}

/* Định nghĩa màu và icon cụ thể cho từng nút */
.float-btn-phone {
    background-color: #E22D30;
}
.float-btn-phone .float-icon {
    background-color: #E22D30;
}
.float-btn-phone .float-icon svg {
    width: 20px;
    height: 20px;
}

.float-btn-zalo {
    background-color: #0068FF;
}
.float-btn-zalo .float-icon {
    background-color: #0068FF;
}
.zalo-text-icon {
    font-family: var(--font-body);
    font-size: 0.65rem;
    font-weight: 900;
    letter-spacing: -0.5px;
}

.float-btn-messenger {
    background-color: #0084FF;
}
.float-btn-messenger .float-icon {
    background-color: #0084FF;
}
.float-btn-messenger .float-icon svg {
    width: 22px;
    height: 22px;
}

/* Pulse animation cho các nút nổi bật */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(226, 45, 48, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(226, 45, 48, 0); }
    100% { box-shadow: 0 0 0 0 rgba(226, 45, 48, 0); }
}

@keyframes pulseZalo {
    0% { box-shadow: 0 0 0 0 rgba(0, 104, 255, 0.7); }
    70% { box-shadow: 0 0 0 15px rgba(0, 104, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 104, 255, 0); }
}

.float-btn-phone {
    animation: pulse 2s infinite;
}
.float-btn-zalo {
    animation: pulseZalo 2s infinite 0.7s;
}

/* 15. HIỆU ỨNG ANIAMTION KHI SCROLL (Intersection Observer) */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in-up.appear {
    opacity: 1;
    transform: translateY(0);
}

.delay-100 { transition-delay: 100ms; }
.delay-150 { transition-delay: 150ms; }
.delay-200 { transition-delay: 200ms; }
.delay-250 { transition-delay: 250ms; }
.delay-300 { transition-delay: 300ms; }
.delay-350 { transition-delay: 350ms; }
.delay-400 { transition-delay: 400ms; }
.delay-500 { transition-delay: 500ms; }