/* ===================================
   Tamga Software - Main Styles
   Цветовая схема: #00BCD4 (cyan), #2196F3 (blue)
   =================================== */

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

:root {
    /* Primary Colors from Tamga Brand */
    --primary-cyan: #00BCD4;
    --primary-blue: #2196F3;
    --dark-blue: #1976D2;
    --light-cyan: #4DD0E1;
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F5F7FA;
    --gray: #E0E5EB;
    --dark-gray: #6B7280;
    --text-dark: #1F2937;
    --black: #0F172A;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-cyan) 0%, var(--primary-blue) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

html {
    scroll-behavior: smooth;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-heading);
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--dark-blue);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

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

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

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-label {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.1) 0%, rgba(33, 150, 243, 0.1) 100%);
    color: var(--primary-blue);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: 1.125rem;
    color: var(--dark-gray);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   Header & Navigation
   =================================== */

#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

#header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    flex-shrink: 0;
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-blue);
    cursor: pointer;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
    justify-content: flex-end;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.25rem;
    align-items: center;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

.nav-menu li {
    display: flex;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    font-size: 0.9375rem;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-blue);
    background: rgba(33, 150, 243, 0.1);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
    height: 2px;
    background: var(--gradient-primary);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
    margin-top: 70px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(0, 188, 212, 0.05) 0%, 
        rgba(33, 150, 243, 0.05) 50%,
        rgba(25, 118, 210, 0.05) 100%);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-background::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(33, 150, 243, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-text {
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

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

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInRight 1s ease 0.3s both;
}

.hero-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    max-width: 400px;
    position: relative;
    overflow: hidden;
    animation: float 6s ease-in-out infinite, pulse-glow 3s ease-in-out infinite;
}

.hero-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, 
        transparent 30%, 
        rgba(0, 188, 212, 0.1) 50%, 
        transparent 70%);
    background-size: 200% 200%;
    animation: rotate-gradient 8s linear infinite;
    pointer-events: none;
}

.hero-card .hero-logo {
    position: relative;
    z-index: 1;
    animation: float 4s ease-in-out infinite;
    animation-delay: 0.5s;
}

.hero-card h3,
.hero-card p {
    position: relative;
    z-index: 1;
}

.hero-card-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
}

.hero-card-particles .particle {
    position: absolute;
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.6), rgba(33, 150, 243, 0.6));
    border-radius: 50%;
    animation: particle-float 15s ease-in-out infinite;
}

.hero-card-particles .particle:nth-child(1) {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
    animation-duration: 12s;
}

.hero-card-particles .particle:nth-child(2) {
    width: 60px;
    height: 60px;
    top: 60%;
    right: 15%;
    animation-delay: 2s;
    animation-duration: 15s;
}

.hero-card-particles .particle:nth-child(3) {
    width: 40px;
    height: 40px;
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
    animation-duration: 18s;
}

.hero-card-particles .particle:nth-child(4) {
    width: 50px;
    height: 50px;
    top: 30%;
    right: 25%;
    animation-delay: 1s;
    animation-duration: 14s;
}

.hero-card-particles .particle:nth-child(5) {
    width: 35px;
    height: 35px;
    bottom: 30%;
    right: 10%;
    animation-delay: 3s;
    animation-duration: 16s;
}

@keyframes particle-float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.3;
    }
    25% {
        transform: translate(20px, -30px) scale(1.1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-20px, -60px) scale(0.9);
        opacity: 0.4;
    }
    75% {
        transform: translate(30px, -40px) scale(1.05);
        opacity: 0.6;
    }
}

.hero-card i {
    font-size: 4rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.hero-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.hero-card p {
    color: var(--dark-gray);
    margin-bottom: 0;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--primary-blue);
}

/* ===================================
   About Section
   =================================== */

.about {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.about-text h3 {
    font-size: 1.75rem;
    color: var(--black);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--dark-gray);
    font-size: 1.125rem;
    line-height: 1.8;
}

.values-list {
    list-style: none;
}

.values-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-size: 1.0625rem;
    color: var(--text-dark);
}

.values-list i {
    color: var(--primary-blue);
    font-size: 1.25rem;
    margin-top: 0.125rem;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.stat-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-base);
}

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

.stat-card i {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.stat-card h4 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.stat-card p {
    color: var(--dark-gray);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===================================
   Product Section
   =================================== */

.product {
    padding: var(--spacing-2xl) 0;
    background: var(--light-gray);
}

/* Products Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.product-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.product-card.main-product {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.05) 0%, rgba(33, 150, 243, 0.05) 100%);
    border: 2px solid var(--primary-blue);
}

.product-badge {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-badge.main {
    background: var(--gradient-primary);
    color: var(--white);
}

.product-badge.development {
    background: rgba(255, 152, 0, 0.1);
    color: #FF9800;
}

.product-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-md);
}

.product-icon i {
    font-size: 2.5rem;
    color: var(--white);
}

.product-card h3 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    color: var(--black);
}

.product-tagline {
    font-size: 0.9375rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.product-description {
    color: var(--dark-gray);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.product-features-list {
    list-style: none;
    padding: 0;
    margin-bottom: var(--spacing-lg);
}

.product-features-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.product-features-list i {
    color: var(--primary-blue);
    margin-top: 0.25rem;
}

.product-btn {
    margin-top: auto;
    justify-content: center;
}

.product-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Product Details Section */
.product-details-section {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.details-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--black);
}

.product-overview {
    margin-bottom: var(--spacing-2xl);
}

/* ===================================
   Other Products Section
   =================================== */

.other-products {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.other-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.product-main {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
}

.product-main h4 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

.product-main > p {
    font-size: 1.125rem;
    color: var(--dark-gray);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.product-highlights {
    display: grid;
    gap: var(--spacing-lg);
}

.highlight-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--light-gray);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.highlight-item:hover {
    background: rgba(33, 150, 243, 0.05);
    transform: translateX(10px);
}

.highlight-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    color: var(--white);
    font-size: 1.75rem;
}

.highlight-content h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.highlight-content p {
    color: var(--dark-gray);
    margin-bottom: 0;
    line-height: 1.6;
}

/* Product Benefits */
.product-benefits {
    margin-top: var(--spacing-2xl);
}

.product-benefits h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

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

.benefit-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

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

.benefit-card i {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.benefit-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--black);
}

.benefit-card p {
    color: var(--dark-gray);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card.main-product {
        grid-column: 1;
    }
    
    .other-products-grid {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ===================================
   Features Section
   =================================== */

.features {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.features-tabs {
    margin-top: var(--spacing-xl);
}

.tabs-nav {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--light-gray);
    border: 2px solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark-gray);
    min-width: 150px;
}

.tab-btn i {
    font-size: 1.75rem;
}

.tab-btn:hover {
    background: rgba(33, 150, 243, 0.1);
    color: var(--primary-blue);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: var(--white);
    border-color: var(--primary-blue);
}

.tabs-content {
    position: relative;
    min-height: 400px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

.feature-detail h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

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

.feature-item {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-blue);
    transform: translateY(-3px);
}

.feature-item i {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-md);
}

.feature-item h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--black);
}

.feature-item p {
    color: var(--dark-gray);
    font-size: 0.9375rem;
    margin-bottom: 0;
    line-height: 1.6;
}

/* Technical Specifications */
.technical-specs {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--light-gray);
    border-radius: var(--radius-2xl);
}

.technical-specs h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.spec-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.spec-card i {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-md);
}

.spec-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    color: var(--black);
}

.spec-card p {
    color: var(--dark-gray);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===================================
   Contact Section
   =================================== */

.contact {
    padding: var(--spacing-2xl) 0;
    background: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.contact-info h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: var(--radius-lg);
}

.contact-item i {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.contact-item p,
.contact-item a {
    margin: 0;
    color: var(--dark-gray);
}

.social-links {
    margin-top: var(--spacing-xl);
}

.social-links h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    border-radius: var(--radius-md);
    font-size: 1.5rem;
    color: var(--primary-blue);
    transition: all var(--transition-base);
}

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

/* Contact Form */
.contact-form-wrapper {
    background: var(--light-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-2xl);
}

.contact-form-wrapper h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-lg);
}

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--gray);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    grid-column: 1 / -1;
    justify-content: center;
    margin-top: var(--spacing-md);
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    display: none;
}

.form-message.success {
    background: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
    display: block;
}

.form-message.error {
    background: rgba(244, 67, 54, 0.1);
    color: #F44336;
    display: block;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--black);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-logo img {
    height: 35px;
    width: auto;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-cyan);
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer-links a:hover {
    color: var(--primary-cyan);
}

/* ===================================
   Authentication Modal
   =================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
    font-weight: 300;
    color: #6B7280;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: #EF4444;
    background: rgba(239, 68, 68, 0.1);
    transform: rotate(90deg);
}

.auth-form h2 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.auth-form h2 i {
    color: var(--primary-cyan);
}

.auth-description {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-form label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-form label i {
    color: var(--primary-cyan);
    font-size: 0.875rem;
}

.auth-form input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary-cyan);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-cyan);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.auth-switch a:hover {
    color: var(--primary-blue);
    text-decoration: underline;
}

.auth-divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: #E5E7EB;
}

.auth-divider::before {
    left: 0;
}

.auth-divider::after {
    right: 0;
}

.auth-admin-note {
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.1), rgba(33, 150, 243, 0.1));
    border-left: 4px solid var(--primary-cyan);
    padding: 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.auth-admin-note i {
    color: var(--primary-cyan);
    margin-right: 0.5rem;
}

.auth-admin-note strong {
    color: var(--primary-blue);
}

.btn-login {
    background: linear-gradient(135deg, var(--primary-cyan), var(--primary-blue));
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    white-space: nowrap;
}
    gap: 0.5rem;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 188, 212, 0.3);
}

.btn-logout {
    background: #EF4444;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
}

.btn-logout:hover {
    background: #DC2626;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.3);
}

.user-info {
    display: none;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.user-name {
    color: var(--text-primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    font-size: 0.875rem;
}

.user-name i {
    color: var(--primary-cyan);
}

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

/* ===================================
   Comments Section
   =================================== */

.comments-section {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 2px solid #E5E7EB;
}

.comments-section h3 {
    color: var(--text-primary);
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comments-section h3 i {
    color: var(--primary-cyan);
}

.comment-form {
    background: #F9FAFB;
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.comment-form textarea {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    border: 2px solid #E5E7EB;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--primary-cyan);
    box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.1);
}

.comment-item {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid #E5E7EB;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.comment-item:hover {
    border-color: var(--primary-cyan);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.comment-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.comment-author {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.comment-author i {
    color: var(--primary-cyan);
}

.comment-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.comment-text {
    color: var(--text-primary);
    line-height: 1.6;
}

.login-prompt {
    background: linear-gradient(135deg, rgba(0, 188, 212, 0.1), rgba(33, 150, 243, 0.1));
    border: 2px solid var(--primary-cyan);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
}

.login-prompt h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.login-prompt p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 188, 212, 0.3),
                    0 0 40px rgba(33, 150, 243, 0.2),
                    0 10px 30px rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 188, 212, 0.5),
                    0 0 60px rgba(33, 150, 243, 0.3),
                    0 15px 40px rgba(0, 0, 0, 0.15);
    }
}

@keyframes rotate-gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .section-title {
        font-size: 2rem;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-right {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-lg);
        transition: left var(--transition-base);
        box-shadow: var(--shadow-lg);
        align-items: stretch;
        gap: 2rem;
    }
    
    .nav-right.active {
        left: 0;
    }
    
    .nav-menu {
        position: static;
        width: 100%;
        height: auto;
        flex-direction: column;
        padding: 0;
        box-shadow: none;
        left: 0;
        gap: 0.5rem;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu .nav-link {
        display: block;
        width: 100%;
        text-align: left;
        padding: 1rem;
    }
    
    .nav-menu .btn-login {
        width: 100%;
        justify-content: center;
    }
    
    .user-info {
        flex-direction: column;
        width: 100%;
        gap: 1rem;
    }
    
    .user-info .btn-logout {
        width: 100%;
        justify-content: center;
    }
    
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .benefits-grid,
    .feature-grid,
    .specs-grid {
        grid-template-columns: 1fr;
    }
    
    .tabs-nav {
        flex-direction: column;
    }
    
    .tab-btn {
        min-width: auto;
    }
    
    .coming-soon-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */

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

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }