/* ================================
   GC HÒA BÌNH - Modern Professional Design
   Colors: Deep Navy, Clean White, Accent Blue
================================ */

/* ================================
   CSS Variables & Reset
================================ */
:root {
    /* Primary Colors - Modern Slate Blue */
    --primary: #0f172a;
    --primary-dark: #020617;
    --primary-light: #1e3a5f;
    --secondary: #2563eb;
    --secondary-light: #3b82f6;
    --accent: #60a5fa;
    
    /* Modern Accent - Emerald Green */
    --emerald: #059669;
    --emerald-light: #10b981;
    
    /* Neutral Colors - Slate */
    --dark: #0f172a;
    --gray-900: #1e293b;
    --gray-800: #334155;
    --gray-700: #475569;
    --gray-600: #64748b;
    --gray-500: #94a3b8;
    --gray-400: #cbd5e1;
    --gray-300: #e2e8f0;
    --gray-200: #f1f5f9;
    --gray-100: #f8fafc;
    --white: #ffffff;
    
    /* Background Colors */
    --bg-light: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e40af 50%, #3b82f6 100%);
    --bg-gradient-light: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --bg-gradient-accent: linear-gradient(135deg, #059669 0%, #10b981 100%);
    
    /* Effect Colors */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.2);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-blue: 0 4px 14px rgba(37, 99, 235, 0.4);
    --shadow-blue-lg: 0 8px 30px rgba(37, 99, 235, 0.5);
    
    /* Spacing */
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================
   Reset & Base Styles
================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Plus Jakarta Sans', 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark);
}

/* ================================
   Container
================================ */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ================================
   Header - Modern Glass Effect
================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: var(--bg-gradient);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.02em;
}

.logo-sub {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--gray-500);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Navigation */
.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--gray-600);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    position: relative;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary);
    background: var(--gray-100);
}

.nav-link.active {
    color: var(--primary);
    font-weight: 600;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ================================
   Hero Section - Modern & Clean
================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--white);
    overflow: hidden;
    padding-top: 72px;
}

/* Subtle Grid Pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

/* Gradient Orbs */
.hero::after {
    content: '';
    position: absolute;
    top: -20%;
    right: -5%;
    width: 60%;
    height: 80%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-content {
    flex: 1;
    display: flex;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 60px 0;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
    align-items: center;
}

/* Hero Text */
.hero-text {
    max-width: 580px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gray-200);
    color: var(--secondary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    font-size: 0.8rem;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--emerald-light);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero-title-line {
    display: block;
    color: var(--dark);
}

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

.hero-desc {
    font-size: 1.2rem;
    color: var(--gray-700);
    margin-bottom: 36px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.hero-visual::before {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    animation: float-bg 8s ease-in-out infinite;
}

@keyframes float-bg {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-icon {
    font-size: 10rem;
    position: relative;
    z-index: 1;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 25px 50px rgba(37, 99, 235, 0.25));
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ================================
   Buttons - Modern Style
================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 14px 28px;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
    color: var(--white);
    box-shadow: var(--shadow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-blue-lg);
}

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

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

.btn-full {
    width: 100%;
}

.btn-icon {
    font-size: 1.1rem;
    transition: var(--transition);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ================================
   Section Styles
================================ */
.section-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(5, 150, 105, 0.08) 100%);
    color: var(--secondary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 700;
    font-size: 0.8rem;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.section-title {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-700);
    line-height: 1.7;
}

.section-header.light .section-tag {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.25);
}

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

.section-header.light .section-subtitle {
    color: rgba(255, 255, 255, 0.85);
}

/* ================================
   About Section - Clean & Professional
================================ */
.about {
    padding: 60px 0 100px;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
    align-items: start;
}

.about-text p {
    margin-bottom: 20px;
    color: var(--gray-700);
    line-height: 1.8;
}

.about-lead {
    font-size: 1.15rem;
    color: var(--gray-800) !important;
    font-weight: 500;
}

.about-lead strong {
    color: var(--secondary);
}

/* About Features - Modern Cards */
.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
}

.about-feature {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    border: 1px solid transparent;
}

.about-feature:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary);
}

.feature-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
    color: var(--white);
    font-weight: 700;
    border-radius: var(--radius);
    font-size: 1rem;
}

.feature-text h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--dark);
}

.feature-text p {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin: 0;
}

/* Info Card - Modern Dark */
.about-info-card {
    background: linear-gradient(135deg, var(--dark) 0%, #1e3a5f 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    position: sticky;
    top: 96px;
}

.info-card-header {
    padding: 32px;
    background: rgba(255, 255, 255, 0.08);
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-card-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}

.info-card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
}

.info-card-body {
    padding: 32px;
}

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

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

.info-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-value {
    font-weight: 600;
    color: var(--white);
    font-size: 0.95rem;
}

/* ================================
   Products Section - Modern Cards
================================ */
.products {
    padding: 120px 0;
    background: var(--gray-100);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-300);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--secondary);
}

.product-card.featured {
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
    color: var(--white);
    border: none;
}

.product-card.featured .product-desc,
.product-card.featured .product-features li {
    color: rgba(255, 255, 255, 0.9);
}

.product-card.featured .product-badge {
    background: var(--white);
    color: var(--secondary);
}

.product-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    display: block;
}

.product-title {
    font-size: 1.35rem;
    margin-bottom: 16px;
    color: var(--dark);
}

.product-card.featured .product-title {
    color: var(--white);
}

.product-desc {
    color: var(--gray-700);
    margin-bottom: 24px;
    line-height: 1.7;
}

.product-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.product-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.product-features li::before {
    content: '';
    width: 20px;
    height: 20px;
    background: var(--secondary);
    border-radius: 50%;
    flex-shrink: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: 12px;
    background-repeat: no-repeat;
    background-position: center;
    margin-top: 2px;
}

.product-card.featured .product-features li::before {
    background-color: rgba(255, 255, 255, 0.3);
}

.product-badge {
    position: absolute;
    top: 24px;
    right: 24px;
    background: var(--secondary);
    color: var(--white);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 600;
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ================================
   Benefits Section - Dark Theme
================================ */
.benefits {
    padding: 120px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    position: relative;
    overflow: hidden;
}

/* Subtle Pattern */
.benefits::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(5, 150, 105, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.benefits-bg {
    position: relative;
    z-index: 1;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 36px;
    text-align: center;
    transition: var(--transition);
}

.benefit-card:hover {
    background: rgba(37, 99, 235, 0.15);
    transform: translateY(-6px);
    border-color: rgba(37, 99, 235, 0.3);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    display: block;
}

.benefit-title {
    font-size: 1.1rem;
    color: var(--white);
    margin-bottom: 12px;
}

.benefit-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
}

/* Benefits Detail */
.benefits-detail {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.benefit-detail-card {
    display: flex;
    gap: 24px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: 36px;
}

.benefit-detail-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.benefit-detail-content h3 {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.benefit-detail-content p {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 12px;
    line-height: 1.7;
}

/* ================================
   Contact Section
================================ */
.contact {
    padding: 120px 0;
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

/* Contact Info Cards */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    gap: 20px;
    padding: 28px;
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    transition: var(--transition);
    border: 1px solid transparent;
}

.contact-card:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary);
    transform: translateX(8px);
}

.contact-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-card-content h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--dark);
}

.contact-card-content p {
    color: var(--gray-700);
    font-size: 0.95rem;
    line-height: 1.6;
}

.contact-card-content a {
    color: var(--secondary);
    font-weight: 600;
}

.contact-card:hover .contact-card-content a {
    color: var(--secondary);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--gray-100);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 32px;
    color: var(--dark);
}

.form-group {
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--gray-800);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-500);
}

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

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 18px;
}

/* ================================
   Footer - Modern Clean
================================ */
.footer {
    background: var(--dark);
    color: var(--white);
}

.footer-main {
    padding: 80px 0 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 60px;
}

.footer-brand {
    max-width: 320px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.footer-logo .logo-icon {
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
}

.footer-logo .logo-main {
    color: var(--white);
}

.footer-logo .logo-sub {
    color: rgba(255, 255, 255, 0.6);
}

.footer-desc {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 6px;
}

.footer-contact h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.9rem;
}

.footer-contact-item a {
    color: rgba(255, 255, 255, 0.75);
}

.footer-contact-item a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* ================================
   Back to Top - Modern Button
================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--secondary) 0%, #1d4ed8 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-blue-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.5);
}

/* ================================
   Animations
================================ */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* ================================
   Responsive Design
================================ */
@media (max-width: 1200px) {
    .hero-inner {
        gap: 60px;
    }

    .hero-title {
        font-size: 3.25rem;
    }
}

@media (max-width: 1024px) {
    .hero-inner {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 48px;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-icon {
        font-size: 8rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-info-card {
        position: static;
        max-width: 500px;
        margin: 0 auto;
    }

    .products-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

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

    .benefits-detail {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        padding: 24px;
        box-shadow: var(--shadow-xl);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        gap: 8px;
    }

    .nav-link {
        display: block;
        padding: 14px 20px;
        border-radius: var(--radius);
    }

    .mobile-toggle {
        display: flex;
    }

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

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

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

    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero-content {
        padding: 40px 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-desc {
        font-size: 1.05rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
    }

    .hero-icon {
        font-size: 6rem;
    }

    .section-title {
        font-size: 2.25rem;
    }

    .about {
        padding: 80px 0;
    }

    .about-features {
        gap: 16px;
    }

    .about-feature {
        padding: 16px;
    }

    .products {
        padding: 80px 0;
    }

    .product-card {
        padding: 32px;
    }

    .benefits {
        padding: 80px 0;
    }

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

    .benefit-card {
        padding: 28px;
    }

    .benefit-detail-card {
        flex-direction: column;
        text-align: center;
        padding: 28px;
    }

    .contact {
        padding: 80px 0;
    }

    .contact-form-wrapper {
        padding: 32px 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .footer-main {
        padding: 60px 0 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .footer-brand {
        max-width: 100%;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-links ul {
        align-items: center;
    }

    .footer-contact-item {
        justify-content: center;
    }

    .footer-bottom-inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .back-to-top {
        bottom: 24px;
        right: 24px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .header-inner {
        height: 64px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.875rem;
    }

    .about-feature {
        align-items: flex-start;
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }

    .product-icon {
        font-size: 2.5rem;
    }

    .product-title {
        font-size: 1.2rem;
    }

    .contact-card {
        padding: 20px;
        flex-direction: column;
        text-align: center;
    }

    .contact-card-icon {
        width: 48px;
        height: 48px;
        margin: 0 auto;
    }
}

/* ================================
   Print Styles
================================ */
@media print {
    .header,
    .back-to-top {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: 40px 0;
    }
}