/* ========================================
   NỘI THẤT GỖ HV - LANDING PAGE STYLES
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #8B4513;
    --primary-dark: #5D2E0C;
    --primary-light: #A0522D;
    --secondary: #D4A574;
    --accent: #C9A66B;
    --gold: #D4AF37;
    
    /* Neutrals */
    --white: #FFFFFF;
    --off-white: #FAF8F5;
    --cream: #F5F1EB;
    --light-gray: #E8E4DE;
    --gray: #9A9590;
    --dark-gray: #4A4540;
    --dark: #2D2926;
    --black: #1A1815;
    
    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Roboto', system-ui, sans-serif;
    
    /* Spacing */
    --section-padding: 100px;
    --container-width: 1200px;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(45, 41, 38, 0.08);
    --shadow-md: 0 8px 30px rgba(45, 41, 38, 0.12);
    --shadow-lg: 0 15px 50px rgba(45, 41, 38, 0.15);
    --shadow-xl: 0 25px 80px rgba(45, 41, 38, 0.2);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--black);
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

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

/* ========================================
   PRELOADER
   ======================================== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader {
    text-align: center;
}

.loader-icon {
    font-size: 60px;
    color: var(--gold);
    animation: pulse 1.5s infinite;
}

.loader-text {
    display: block;
    margin-top: 20px;
    font-family: var(--font-heading);
    font-size: 24px;
    color: var(--white);
    letter-spacing: 2px;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--white);
}

.navbar.scrolled .logo {
    color: var(--primary-dark);
}

.logo i {
    font-size: 28px;
    color: var(--gold);
}

.logo .highlight {
    color: var(--gold);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    padding: 5px 0;
}

.navbar.scrolled .nav-link {
    color: var(--dark);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: var(--transition);
}

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

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

.phone-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gold);
    color: var(--black);
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.phone-btn:hover {
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--white);
    transition: var(--transition);
}

.navbar.scrolled .hamburger span {
    background: var(--dark);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.unsplash.com/photo-1618221195710-dd6b41faaea6?w=1920&h=1080&fit=crop') center/cover no-repeat;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(45, 41, 38, 0.85) 0%, rgba(139, 69, 19, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background: rgba(212, 175, 55, 0.15);
    border: 1px solid rgba(212, 175, 55, 0.3);
    border-radius: var(--radius-xl);
    color: var(--gold);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 30px;
    animation: fadeInDown 1s ease;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    color: var(--white);
    margin-bottom: 25px;
    animation: fadeInUp 1s ease 0.2s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--gold) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 650px;
    margin: 0 auto 40px;
    animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease 0.6s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 100%);
    color: var(--black);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-dark);
    border-color: var(--white);
}

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

/* Hero Stats */
.hero-stats {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 50px;
    animation: fadeInUp 1s ease 0.8s both;
}

.stat-item {
    text-align: center;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1.2;
    height: 60px;
}

.stat-number::after {
    content: '+';
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 8px;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.hero-scroll a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

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

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

/* ========================================
   SECTION COMMON STYLES
   ======================================== */
.section-label {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.section-label.center {
    justify-content: center;
}

.section-label span {
    width: 40px;
    height: 2px;
    background: var(--gold);
}

.section-label p {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 20px;
}

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

.section-title .highlight {
    color: var(--primary);
}

.section-description {
    font-size: 17px;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.section-header {
    margin-bottom: 60px;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    padding: var(--section-padding) 0;
    background: var(--off-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-images {
    position: relative;
}

.about-img {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.about-img:hover img {
    transform: scale(1.05);
}

.main-img {
    position: relative;
}

.experience-badge {
    position: absolute;
    bottom: -15px;
    right: -20px;
    background: rgba(139, 90, 43, 0.85);
    backdrop-filter: blur(10px);
    padding: 25px 40px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    opacity: 0.9;
}

.exp-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 42px;
    font-weight: 700;
    color: var(--gold);
    line-height: 1.1;
}

.exp-text {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
    margin-top: 5px;
}

.about-content {
    padding-left: 20px;
}

.about-text {
    font-size: 16px;
    color: var(--dark-gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    margin: 35px 0;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 20px;
    color: var(--white);
}

.feature-text h4 {
    font-size: 18px;
    margin-bottom: 5px;
    font-family: var(--font-body);
    font-weight: 600;
}

.feature-text p {
    font-size: 14px;
    color: var(--gray);
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.service-card {
    position: relative;
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--gold) 0%, var(--primary) 100%);
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-card.featured {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
}

.service-card.featured::before {
    background: var(--gold);
    transform: scaleX(1);
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.15);
}

.service-card.featured .service-icon i,
.service-card.featured h3,
.service-card.featured p,
.service-card.featured .service-features li {
    color: var(--white);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gold);
    color: var(--black);
    padding: 5px 12px;
    border-radius: var(--radius-xl);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(139, 69, 19, 0.1) 0%, rgba(212, 175, 55, 0.1) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon i {
    font-size: 28px;
    color: var(--primary);
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    font-family: var(--font-body);
    font-weight: 600;
}

.service-card p {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.service-features {
    margin-bottom: 25px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--dark-gray);
    margin-bottom: 10px;
}

.service-features li i {
    color: var(--gold);
    font-size: 12px;
}

/* ========================================
   PRODUCTS SECTION
   ======================================== */
.products {
    padding: var(--section-padding) 0;
    background: var(--off-white);
}

.product-filters {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 28px;
    background: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 500;
    color: var(--dark-gray);
    transition: var(--transition);
}

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

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 280px;
    overflow: hidden;
}

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

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--primary);
    color: var(--white);
    padding: 5px 15px;
    border-radius: var(--radius-xl);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.product-badge.new {
    background: var(--gold);
    color: var(--black);
}

.product-info {
    padding: 25px;
}

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

.product-info h4 {
    font-size: 20px;
    margin: 10px 0;
    font-family: var(--font-body);
    font-weight: 600;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
}

/* ========================================
   PROCESS SECTION
   ======================================== */
.process {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
}

.process .section-label p,
.process .section-label span {
    color: var(--gold);
    background: var(--gold);
}

.process .section-label p {
    background: transparent;
}

.process .section-title {
    color: var(--white);
}

.process .section-title .highlight {
    color: var(--gold);
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
}

.process-timeline::before {
    content: '';
    position: absolute;
    top: 50px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
}

.process-step {
    text-align: center;
    position: relative;
}

.step-number {
    font-family: var(--font-heading);
    font-size: 60px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.1);
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
}

.step-content {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 40px 25px;
    transition: var(--transition);
}

.step-content:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    position: relative;
    z-index: 1;
}

.step-icon i {
    font-size: 30px;
    color: var(--white);
}

.step-content h3 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 15px;
    font-family: var(--font-body);
    font-weight: 600;
}

.step-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.testimonials-slider {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background: var(--off-white);
    padding: 35px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.testimonial-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--gold);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-info h4 {
    font-size: 16px;
    font-family: var(--font-body);
    font-weight: 600;
}

.testimonial-info span {
    font-size: 13px;
    color: var(--gray);
}

.testimonial-rating {
    margin-left: auto;
}

.testimonial-rating i {
    color: var(--gold);
    font-size: 14px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--dark-gray);
    line-height: 1.8;
    font-style: italic;
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta {
    padding: 80px 0;
    background: url('https://images.unsplash.com/photo-1600585152220-90363fe7e115?w=1920&h=600&fit=crop') center/cover no-repeat fixed;
    position: relative;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(45, 41, 38, 0.9) 0%, rgba(139, 69, 19, 0.85) 100%);
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(28px, 4vw, 42px);
    color: var(--white);
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 35px;
}

.cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    padding: var(--section-padding) 0;
    background: var(--off-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-details {
    margin: 30px 0;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--accent) 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 18px;
    color: var(--white);
}

.contact-item .contact-text h4 {
    font-size: 16px;
    margin-bottom: 5px;
    font-family: var(--font-body);
    font-weight: 600;
}

.contact-item .contact-text p {
    font-size: 14px;
    color: var(--gray);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 45px;
    height: 45px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 18px;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--gold);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--white);
    padding: 45px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 30px;
    text-align: center;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

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

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--black);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
}

.footer-logo i {
    color: var(--gold);
}

.footer-logo .highlight {
    color: var(--gold);
}

.footer-about p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    margin-bottom: 25px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 16px;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--gold);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    color: var(--white);
    margin-bottom: 25px;
    font-family: var(--font-body);
    font-weight: 600;
}

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

.footer-links ul li a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-contact ul li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 15px;
}

.footer-contact ul li i {
    color: var(--gold);
    width: 18px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--gold);
    transform: translateY(-5px);
}

/* ========================================
   FLOAT BUTTONS
   ======================================== */
.float-buttons {
    position: fixed;
    bottom: 100px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 998;
}

.float-btn {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    animation: pulse-ring 2s infinite;
}

.float-btn:hover {
    transform: scale(1.1);
}

.phone-float {
    background: var(--primary);
    color: var(--white);
    font-size: 22px;
}

.zalo-float {
    background: #0068ff;
}

.zalo-float img {
    width: 30px;
    height: 30px;
}

.messenger-float {
    background: linear-gradient(135deg, #00c6ff, #0078ff);
    color: var(--white);
    font-size: 24px;
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 rgba(139, 69, 19, 0.4); }
    70% { box-shadow: 0 0 0 15px rgba(139, 69, 19, 0); }
    100% { box-shadow: 0 0 0 0 rgba(139, 69, 19, 0); }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-timeline::before {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 70px;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 25px;
        transition: var(--transition);
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-link {
        color: var(--dark);
        font-size: 18px;
    }
    
    .hamburger {
        display: flex;
    }
    
    .phone-btn span {
        display: none;
    }
    
    .phone-btn {
        padding: 12px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .experience-badge {
        position: static;
        margin-top: 20px;
        display: inline-block;
    }
    
    .services-grid,
    .products-grid,
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    .process-timeline {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .float-buttons {
        right: 20px;
        bottom: 80px;
    }
    
    .back-to-top {
        right: 20px;
        bottom: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    .service-card,
    .step-content {
        padding: 30px 20px;
    }
}