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

:root {
    /* Color Palette */
    --primary-color: #0061ff;      /* Électrique bleu */
    --secondary-color: #00c6ae;    /* Birюзовий глубокий */
    --accent-color: #ff6a00;       /* Мандариновый яркий */
    --dark-color: #222831;         /* Светлый графит */
    --light-bg: #f9f9f9;          /* Ледяной белый */
    --white: #ffffff;
    --text-primary: #222831;
    --text-secondary: #666666;
    --text-light: #888888;
    
    /* Typography */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

a:hover {
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    line-height: 1.5;
}

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

.btn-primary:hover {
    background-color: #0051d5;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--white);
}

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

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

.btn-full {
    width: 100%;
}

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar {
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo:hover {
    color: var(--secondary-color);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 3px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: var(--transition-normal);
}

/* Menu mobile avec checkbox caché */
.nav-checkbox {
    display: none;
}

.nav-checkbox:checked ~ .nav-menu {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.nav-checkbox:checked ~ .nav-toggle .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-checkbox:checked ~ .nav-toggle .bar:nth-child(2) {
    opacity: 0;
}

.nav-checkbox:checked ~ .nav-toggle .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Main Content */
.main {
    margin-top: 80px; /* Height of fixed header */
}

/* Section Styles */
section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -2;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 97, 255, 0.8), rgba(0, 198, 174, 0.7));
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    max-width: 800px;
    margin: 0 auto;
    background: rgba(34, 40, 49, 0.3);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xxl);
    box-shadow: var(--shadow-lg);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

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

/* Advantages Section */
.advantages {
    background-color: var(--light-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.advantage-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.advantage-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.advantage-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.advantage-text {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.service-image {
    height: 200px;
    overflow: hidden;
}

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

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

.service-content {
    padding: var(--spacing-lg);
}

.service-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.service-description {
    margin-bottom: var(--spacing-md);
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-md);
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* Process Section */
.process {
    background-color: var(--light-bg);
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.process-step:not(:last-child)::after {
    content: "";
    position: absolute;
    left: 24px;
    top: 60px;
    width: 2px;
    height: calc(100% + var(--spacing-lg));
    background-color: var(--primary-color);
    opacity: 0.3;
}

.step-number {
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.step-description {
    color: var(--text-secondary);
}

/* Testimonials Section */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial-card {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--accent-color);
    transition: transform var(--transition-normal);
}

.testimonial-card:hover {
    transform: translateY(-3px);
}

.testimonial-text {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.testimonial-author strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Contact Form Section */
.contact-form-section {
    background-color: var(--light-bg);
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-weight: 500;
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.5;
}

.checkbox-input {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid #e0e0e0;
    border-radius: var(--border-radius-sm);
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
}

.checkbox-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-input:checked::after {
    content: "✓";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--white);
    font-size: 12px;
    font-weight: bold;
}

.form-note {
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
    margin-top: var(--spacing-md);
}

/* Alerts */
.alert {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-md);
}

.alert-error {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #c33;
}

.alert ul {
    margin: 0;
    padding-left: var(--spacing-md);
}

/* FAQ Section - Styles de base uniquement */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-title {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.footer-subtitle {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.footer-text {
    color: #ccc;
    line-height: 1.6;
}

.contact-info .contact-item {
    margin-bottom: var(--spacing-md);
    color: #ccc;
}

.contact-info strong {
    color: var(--white);
}

.contact-info a {
    color: var(--secondary-color);
    text-decoration: none;
}

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

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

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: var(--spacing-lg);
}

.footer-bottom-content {
    text-align: center;
}

.copyright {
    color: #ccc;
    margin-bottom: var(--spacing-sm);
}

.legal-notice {
    color: #999;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(34, 40, 49, 0.95);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: var(--spacing-md);
    z-index: 1001;
    opacity: 0;
    transition: opacity var(--transition-slow);
    display: none;
}

.cookie-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cookie-text {
    flex: 1;
    margin: 0;
    color: #ccc;
    min-width: 300px;
}

.cookie-link {
    color: var(--secondary-color);
    text-decoration: underline;
}

.cookie-link:hover {
    color: var(--white);
}

.cookie-btn,
.cookie-btn-secondary {
    padding: var(--spacing-xs) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.cookie-btn:hover {
    background-color: #0051d5;
}

.cookie-btn-secondary {
    background-color: transparent;
    color: #ccc;
    border: 1px solid #666;
    margin-left: var(--spacing-xs);
}

.cookie-btn-secondary:hover {
    background-color: #666;
    color: var(--white);
}

/* Responsive Design */

/* Tablet */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-xxl: 3rem;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-content {
        padding: var(--spacing-lg);
        margin: 0 var(--spacing-sm);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .advantages-grid,
    .services-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .process-step {
        flex-direction: column;
        text-align: center;
    }
    
    .process-step::after {
        display: none;
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-text {
        min-width: auto;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-content {
        padding: var(--spacing-md);
        margin: 0 var(--spacing-xs);
        backdrop-filter: blur(5px);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
    
    .advantage-card,
    .service-content,
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .testimonial-card {
        padding: var(--spacing-md);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* Large screens */
@media (min-width: 1400px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
}

/* Animation Classes */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* Focus states for accessibility */
.btn:focus,
.form-input:focus,
.form-select:focus,
.nav-link:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}