/* ========================================
   NHÀ GỖ XỨ THANH - Design System
   ======================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables - Design Tokens */
:root {
    /* Color Palette - Warm Wood Tones */
    --color-primary: #8B4513;        /* Saddle Brown - Gỗ chính */
    --color-primary-dark: #5D2E0C;   /* Dark Brown */
    --color-primary-light: #A0522D;  /* Sienna */
    --color-secondary: #D2691E;      /* Chocolate - Gỗ sáng */
    --color-accent: #228B22;         /* Forest Green - Lá cây */
    --color-accent-light: #32CD32;   /* Lime Green */
    --color-gold: #DAA520;           /* Goldenrod - Điểm nhấn sang trọng */
    
    /* Neutral Colors */
    --color-bg-light: #FDF5E6;       /* Old Lace - Nền kem */
    --color-bg-cream: #FAF0E6;       /* Linen */
    --color-bg-white: #FFFAF5;       /* Trắng ấm */
    --color-text-dark: #2C1810;      /* Nâu đậm */
    --color-text-medium: #4A3728;    /* Nâu vừa */
    --color-text-light: #6B5344;     /* Nâu nhạt */
    --color-border: #DEC9B4;         /* Viền nhẹ */
    
    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Font Sizes */
    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-lg: 1.125rem;
    --fs-xl: 1.25rem;
    --fs-2xl: 1.5rem;
    --fs-3xl: 2rem;
    --fs-4xl: 2.5rem;
    --fs-5xl: 3rem;
    --fs-6xl: 4rem;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(44, 24, 16, 0.1);
    --shadow-md: 0 4px 12px rgba(44, 24, 16, 0.12);
    --shadow-lg: 0 8px 30px rgba(44, 24, 16, 0.15);
    --shadow-xl: 0 15px 50px rgba(44, 24, 16, 0.2);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    align-items: center;
    justify-items: center;
    max-width: 100%;
    height: auto;
    display: block;
    margin: auto;
}

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

ul, ol {
    list-style: none;
}

button, input, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

button {
    cursor: pointer;
    background: none;
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-4xl) 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--fs-4xl);
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--space-md);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
    margin: var(--space-md) auto 0;
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 250, 245, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 250, 245, 0.98);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}
.logo-icon img {
    width: 60px;
    height: 55px;
}
.logo-text {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: 900;
    color: var(--color-primary);
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-medium);
    padding: var(--space-sm) 0;
    position: relative;
}

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

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

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

.nav-cta {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: var(--transition-base);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, var(--color-bg-cream) 0%, var(--color-bg-light) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    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='%238B4513' fill-opacity='0.03'%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");
    opacity: 0.5;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 0.8s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    color: white;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: 500;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 50px;
    font-weight: 500;
    color: var(--color-text-dark);
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-title span {
    color: var(--color-primary);
    position: relative;
}

.hero-title span::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-gold);
    opacity: 0.3;
    z-index: -1;
}

.hero-description {
    font-size: var(--fs-lg);
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    margin-top: var(--space-3xl);
    padding-top: var(--space-2xl);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: var(--fs-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

.hero-image {
    position: relative;
    animation: fadeInRight 0.8s ease 0.2s both;
}

.hero-image-main {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.hero-image-badge {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.hero-image-badge-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-gold), #F4C430);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.hero-image-badge-text {
    font-weight: 600;
    color: var(--color-text-dark);
}

.hero-image-badge-text span {
    display: block;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    font-weight: 400;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--fs-base);
    transition: var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(139, 69, 19, 0.4);
}

.btn-secondary {
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-gold {
    background: linear-gradient(135deg, var(--color-gold), #F4C430);
    color: var(--color-text-dark);
    box-shadow: 0 4px 15px rgba(218, 165, 32, 0.3);
}

.btn-gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(218, 165, 32, 0.4);
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    background: var(--color-bg-cream);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, var(--color-bg-white), transparent);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    width: 100%;
    height: 100%;
    border: 4px solid var(--color-primary);
    border-radius: var(--radius-xl);
    z-index: -1;
}

.about-experience {
    position: absolute;
    bottom: 30px;
    right: -30px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about-experience-number {
    font-family: var(--font-heading);
    font-size: var(--fs-4xl);
    font-weight: 700;
}

.about-experience-text {
    font-size: var(--fs-sm);
}

.about-text h2 {
    font-family: var(--font-heading);
    font-size: var(--fs-4xl);
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
    line-height: 1.2;
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
    font-size: var(--fs-lg);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.about-feature {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.about-feature-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.about-feature-text {
    font-weight: 600;
    color: var(--color-text-dark);
}

/* ========================================
   SERVICES SECTION
   ======================================== */
.services {
    background: var(--color-bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.service-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: linear-gradient(135deg, var(--color-bg-cream), var(--color-bg-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    transition: var(--transition-base);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    transform: scale(1.1);
}

.service-card:hover .service-icon span {
    filter: brightness(0) invert(1);
}

.service-title {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-md);
}

.service-description {
    color: var(--color-text-light);
    font-size: var(--fs-sm);
    line-height: 1.7;
}

/* ========================================
   PROJECTS/GALLERY SECTION
   ======================================== */
.projects {
    background: var(--color-bg-cream);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.project-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    cursor: pointer;
}

.project-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(44, 24, 16, 0.9), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-xl);
    opacity: 0;
    transition: var(--transition-base);
}

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

.project-title {
    font-family: var(--font-heading);
    font-size: var(--fs-xl);
    color: white;
    margin-bottom: var(--space-xs);
    transform: translateY(20px);
    transition: var(--transition-base);
}

.project-category {
    font-size: var(--fs-sm);
    color: var(--color-gold);
    transform: translateY(20px);
    transition: var(--transition-base) 0.1s;
}

.project-card:hover .project-title,
.project-card:hover .project-category {
    transform: translateY(0);
}

.projects-cta {
    text-align: center;
    margin-top: var(--space-3xl);
}

/* ========================================
   WHY CHOOSE US SECTION
   ======================================== */
.why-us {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.why-us::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.03' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.why-us .section-title {
    color: white;
}

.why-us .section-title::after {
    background: linear-gradient(90deg, var(--color-gold), white);
}

.why-us .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

.why-us-item {
    text-align: center;
    padding: var(--space-xl);
}

.why-us-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: var(--transition-base);
}

.why-us-item:hover .why-us-icon {
    background: white;
    transform: scale(1.1);
}

.why-us-item:hover .why-us-icon span {
    filter: none;
}

.why-us-number {
    font-family: var(--font-heading);
    font-size: var(--fs-4xl);
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: var(--space-xs);
}

.why-us-label {
    font-size: var(--fs-base);
    opacity: 0.9;
}

/* ========================================
   TESTIMONIALS SECTION
   ======================================== */
.testimonials {
    background: var(--color-bg-white);
}

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

.testimonial-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-md);
    position: relative;
}

.testimonial-card::before {
    content: '"';
    font-family: var(--font-heading);
    font-size: 100px;
    color: var(--color-primary);
    opacity: 0.1;
    position: absolute;
    top: 10px;
    left: 20px;
    line-height: 1;
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: var(--space-md);
    color: var(--color-gold);
    font-size: var(--fs-lg);
}

.testimonial-text {
    color: var(--color-text-medium);
    font-style: italic;
    margin-bottom: var(--space-xl);
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.testimonial-avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-primary);
}

.testimonial-name {
    font-weight: 600;
    color: var(--color-text-dark);
}

.testimonial-role {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    background: var(--color-bg-cream);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: var(--fs-3xl);
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

.contact-info > p {
    color: var(--color-text-light);
    margin-bottom: var(--space-2xl);
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-text strong {
    display: block;
    color: var(--color-text-dark);
    margin-bottom: 4px;
}

.contact-text span {
    color: var(--color-text-light);
    font-size: var(--fs-sm);
}

.contact-text a {
    color: var(--color-primary);
    font-weight: 500;
}

.contact-text a:hover {
    text-decoration: underline;
}

.contact-form-wrapper {
    background: white;
    padding: var(--space-2xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.contact-form-wrapper h3 {
    font-family: var(--font-heading);
    font-size: var(--fs-2xl);
    color: var(--color-primary);
    margin-bottom: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--color-text-dark);
    margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-white);
    transition: var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 69, 19, 0.1);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-text-dark);
    color: white;
    padding-top: var(--space-4xl);
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    padding-bottom: var(--space-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    color: white;
    font-size: var(--fs-2xl);
    margin-bottom: var(--space-md);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.footer-social a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

.footer-column h4 {
    font-family: var(--font-heading);
    font-size: var(--fs-lg);
    margin-bottom: var(--space-xl);
    position: relative;
    padding-bottom: var(--space-sm);
}

.footer-column h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-gold);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-base);
}

.footer-links a:hover {
    color: var(--color-gold);
    padding-left: var(--space-sm);
}

.footer-bottom {
    padding: var(--space-lg) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--fs-sm);
}

.footer-bottom-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--fs-sm);
}

.footer-bottom-links a:hover {
    color: white;
}

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

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1024px) {
    :root {
        --fs-6xl: 3rem;
        --fs-5xl: 2.5rem;
        --fs-4xl: 2rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-us-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --fs-6xl: 2.5rem;
        --fs-5xl: 2rem;
        --fs-4xl: 1.75rem;
        --fs-3xl: 1.5rem;
        --space-4xl: 4rem;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 350px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 100px var(--space-xl) var(--space-xl);
        box-shadow: var(--shadow-xl);
        transition: var(--transition-base);
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto var(--space-xl);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-image-main {
        height: 350px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-text {
        text-align: center;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .why-us-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .testimonials-slider {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-column h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --fs-6xl: 2rem;
        --fs-5xl: 1.75rem;
        --container-padding: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .stat-item {
        text-align: center;
    }
    
    .why-us-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-image-badge {
        position: relative;
        bottom: auto;
        left: auto;
        margin-top: var(--space-lg);
        justify-content: center;
    }
}

/* ========================================
   SCROLL TO TOP BUTTON
   ======================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   PRELOADER (Optional)
   ======================================== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-white);
    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;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ========================================
   FLOATING CONTACT BUTTONS
   ======================================== */
.floating-contact {
    position: fixed;
    bottom: 100px;
    right: 25px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-sm);
}

.floating-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.8);
    transition: all 0.3s ease;
}

.floating-contact.active .floating-buttons {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.floating-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 12px 18px;
    border-radius: var(--radius-full);
    color: white;
    font-weight: 600;
    font-size: var(--fs-sm);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    white-space: nowrap;
}

.floating-btn:hover {
    transform: translateX(-5px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.floating-btn svg {
    flex-shrink: 0;
}

.zalo-btn {
    background: linear-gradient(135deg, #0068FF, #0052CC);
}

.phone-btn {
    background: linear-gradient(135deg, #25D366, #128C7E);
}

.messenger-btn {
    background: linear-gradient(135deg, #00B2FF, #006AFF);
}

.floating-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: 0 4px 20px rgba(139, 69, 19, 0.4);
    transition: var(--transition-base);
    position: relative;
    animation: pulse 2s infinite;
}

.floating-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(139, 69, 19, 0.5);
}

.toggle-icon-open,
.toggle-icon-close {
    position: absolute;
    transition: var(--transition-base);
}

.toggle-icon-close {
    opacity: 0;
    transform: rotate(-90deg);
}

.floating-contact.active .toggle-icon-open {
    opacity: 0;
    transform: rotate(90deg);
}

.floating-contact.active .toggle-icon-close {
    opacity: 1;
    transform: rotate(0);
}

.floating-contact.active .floating-toggle {
    animation: none;
    background: linear-gradient(135deg, #DC3545, #C82333);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(139, 69, 19, 0.4);
    }
    50% {
        box-shadow: 0 4px 30px rgba(139, 69, 19, 0.6), 0 0 0 10px rgba(139, 69, 19, 0.1);
    }
}

/* Mobile Call Banner */
.mobile-call-banner {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #25D366, #128C7E);
    color: white;
    padding: 15px var(--space-lg);
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--fs-base);
    z-index: 1001;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
}

.mobile-call-banner span {
    font-size: 1.25rem;
}

@media (max-width: 768px) {
    .mobile-call-banner {
        display: flex;
    }
    
    .floating-contact {
        bottom: 80px;
        right: 15px;
    }
    
    .floating-btn span {
        display: none;
    }
    
    .floating-btn {
        width: 50px;
        height: 50px;
        padding: 0;
        border-radius: 50%;
        justify-content: center;
    }
    
    .scroll-top {
        bottom: 80px;
    }
}

/* ========================================
   LIGHTBOX GALLERY
   ======================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

.lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
}

.lightbox-container {
    position: relative;
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    z-index: 1;
}

.lightbox-close {
    position: absolute;
    top: -50px;
    right: 0;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-base);
    z-index: 10;
}

.lightbox-close:hover {
    background: var(--color-primary);
    transform: rotate(180deg);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 55px;
    height: 55px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    font-size:1.5rem;
    cursor: pointer;
    transition: var(--transition-base);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-nav:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-50%) scale(1.1);
}

.lightbox-prev {
    left: -70px;
}

.lightbox-next {
    right: -70px;
}

.lightbox-content {
    position: relative;
    background: #1a1a1a;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
}

.lightbox-image {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
    display: block;
    transition: opacity 0.3s ease;
}

.lightbox-info {
    padding: var(--space-xl);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.lightbox-title {
    font-family: var(--font-heading);
    font-size: var(--fs-2xl);
    color: white;
    margin-bottom: var(--space-xs);
}

.lightbox-category {
    color: var(--color-gold);
    font-size: var(--fs-sm);
}

.lightbox-counter {
    position: absolute;
    top: -50px;
    left: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--fs-sm);
}

.lightbox-thumbnails {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-md);
    overflow-x: auto;
}

.lightbox-thumb {
    width: 80px;
    height: 60px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    opacity: 0.5;
    transition: var(--transition-base);
    border: 2px solid transparent;
    flex-shrink: 0;
}

.lightbox-thumb:hover {
    opacity: 0.8;
}

.lightbox-thumb.active {
    opacity: 1;
    border-color: var(--color-gold);
}

.lightbox-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Lightbox Animation */
.lightbox.active .lightbox-content {
    animation: lightboxZoomIn 0.4s ease;
}

@keyframes lightboxZoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Lightbox */
@media (max-width: 1024px) {
    .lightbox-prev {
        left: 10px;
    }
    
    .lightbox-next {
        right: 10px;
    }
    
    .lightbox-nav {
        width: 45px;
        height: 45px;
        font-size: 1.25rem;
    }
}

@media (max-width: 768px) {
    .lightbox-container {
        width: 95%;
    }
    
    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
    
    .lightbox-counter {
        top: 20px;
        left: 10px;
    }
    
    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    
    .lightbox-prev {
        left: 5px;
    }
    
    .lightbox-next {
        right: 5px;
    }
    
    .lightbox-title {
        font-size: var(--fs-lg);
    }
    
    .lightbox-thumbnails {
        display: none;
    }
    
    .lightbox-image {
        max-height: 60vh;
    }
}