/* ===== CSS RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS VARIABLES ===== */
:root {
    /* Цветовая палитра */
    --gradient-primary: linear-gradient(135deg, #FFD43B 0%, #7F00FF 100%);
    --color-primary: #FFD43B;
    --color-secondary: #7F00FF;
    --color-accent-1: #00C9A7;
    --color-accent-2: #FF6F61;
    --color-text: #1A1A1A;
    --color-white: #FFFFFF;
    --color-light: #F8F9FA;
    --color-dark: #2C2C2C;
    
    /* Тени и скругления */
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 15px 35px rgba(0, 0, 0, 0.15);
    --border-radius: 1.5rem;
    --border-radius-lg: 2rem;
    
    /* Шрифты */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
}

/* ===== БАЗОВЫЕ СТИЛИ ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--gradient-primary);
    min-height: 100vh;
}

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

/* ===== КНОПКИ ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
}

.btn-primary {
    background: var(--color-accent-1);
    color: var(--color-white);
}

.btn-primary:hover {
    background: #00A085;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-text);
    border: 2px solid var(--color-accent-1);
}

.btn-secondary:hover {
    background: var(--color-accent-1);
    color: var(--color-white);
}

.btn-accent {
    background: var(--color-accent-2);
    color: var(--color-white);
}

.btn-accent:hover {
    background: #E55A4F;
    transform: translateY(-2px);
}

/* ===== HEADER ===== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-soft);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--color-text);
}

.logo-img {
    width: 40px;
    height: 40px;
    margin-right: var(--spacing-sm);
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-accent-1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-1);
    transition: width 0.3s ease;
}

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

/* Mobile Menu Toggle */
.menu-toggle-checkbox {
    display: none;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    position: relative;
    z-index: 1002;
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
    transform-origin: center;
}

/* Hamburger animation when checked */
.menu-toggle-checkbox:checked + .menu-toggle .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle-checkbox:checked + .menu-toggle .hamburger-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle-checkbox:checked + .menu-toggle .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== MAIN CONTENT ===== */
.main {
    margin-top: 80px;
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section:nth-child(even) {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
}

.section:nth-child(odd) {
    background: rgba(0, 0, 0, 0.05);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.section-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text);
    opacity: 0.8;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('./img/R44y8U.jpg') center/cover;
    opacity: 0.1;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-cta {
    animation: fadeInUp 1s ease 0.4s both;
}

/* ===== GRID LAYOUTS ===== */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ===== CARDS ===== */
.card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

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

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-lg);
    background: var(--color-accent-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: var(--font-size-2xl);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.card-description {
    color: var(--color-text);
    opacity: 0.8;
    line-height: 1.6;
}

/* ===== FORM STYLES ===== */
.form {
    background: var(--color-white);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid #E5E7EB;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: all 0.3s ease;
    background: var(--color-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.1);
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.form-checkbox input {
    margin-top: 2px;
}

.form-checkbox label {
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.form-checkbox a {
    color: var(--color-accent-1);
    text-decoration: none;
}

.form-checkbox a:hover {
    text-decoration: underline;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent-1);
}

.footer-description {
    opacity: 0.8;
    line-height: 1.6;
}

.contact-info p {
    margin-bottom: var(--spacing-sm);
}

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

.contact-info a:hover {
    color: var(--color-accent-1);
}

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

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

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-accent-1);
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
}

/* ===== COOKIE BANNER ===== */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-medium);
    padding: var(--spacing-lg);
    z-index: 1001;
    transform: translateY(100%);
    transition: all 0.3s ease;
}

.cookie-banner.show {
    transform: translateY(0);
}

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

.cookie-text h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.cookie-text p {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.cookie-text a {
    color: var(--color-accent-1);
    text-decoration: none;
}

.cookie-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

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

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

.fade-in {
    animation: fadeIn 1s ease;
}

.fade-in-up {
    animation: fadeInUp 1s ease;
}

/* ===== RESPONSIVE DESIGN ===== */

/* Large screens (1280px+) */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
}

/* Medium screens (1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
}

/* Tablets (768px) */
@media (max-width: 768px) {
    :root {
        --spacing-3xl: 3rem;
        --spacing-2xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        box-shadow: var(--shadow-soft);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 1001;
    }
    
    /* Show nav when checkbox is checked */
    .menu-toggle-checkbox:checked ~ .nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    /* Close menu when clicking on nav link */
    .nav-link {
        display: block;
        padding: var(--spacing-sm) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .cookie-content {
        flex-direction: column;
        text-align: center;
    }
    
    .cookie-actions {
        justify-content: center;
    }
    
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* Mobile phones (480px) */
@media (max-width: 480px) {
    :root {
        --spacing-3xl: 2rem;
        --spacing-2xl: 1.5rem;
        --spacing-xl: 1.25rem;
    }
    
    .hero {
        min-height: 70vh;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .form {
        padding: var(--spacing-lg);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}