/* ===== ОСНОВНЫЕ ПЕРЕМЕННЫЕ ===== */
:root {
    --primary-color: #3A0CA3; /* ультрамариновый */
    --secondary-color: #FF6F59; /* кораллово-оранжевый */
    --accent-color: #B9FBC0; /* бледно-зеленый */
    --background-color: #050505; /* темно-синий фоновый */
    --text-color: #FFFFFF; /* белый */
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    --gradient-accent: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== ТИПОГРАФИКА ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--accent-color);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--secondary-color);
}

p {
    margin-bottom: 1rem;
    font-size: clamp(1rem, 2vw, 1.125rem);
    opacity: 0.9;
}

/* ===== КОНТЕЙНЕРЫ ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
    position: relative;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(58, 12, 163, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(5, 5, 5, 0.98);
    box-shadow: var(--shadow);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

.logo:hover {
    color: var(--secondary-color);
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: var(--transition);
}

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

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

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: 
        radial-gradient(circle at 20% 80%, rgba(58, 12, 163, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 111, 89, 0.3) 0%, transparent 50%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

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

.hero-content {
    z-index: 2;
    position: relative;
    max-width: 800px;
    animation: fadeInUp 1s ease-out;
}

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

.hero-title {
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    opacity: 0.8;
    animation: fadeInUp 1s ease-out 0.4s both;
}

/* ===== КНОПКИ ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 15px 30px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 5px 20px rgba(58, 12, 163, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(58, 12, 163, 0.6);
}

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

.btn-secondary:hover {
    background: var(--accent-color);
    color: var(--background-color);
    transform: translateY(-3px);
}

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

.btn-outline:hover {
    background: var(--text-color);
    color: var(--background-color);
    border-color: var(--text-color);
}

/* ===== КАРТОЧКИ ===== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: translateX(-100%);
    transition: var(--transition);
}

.card:hover::before {
    transform: translateX(0);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
    border-color: var(--secondary-color);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card-title {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.card-text {
    opacity: 0.8;
    line-height: 1.6;
}

/* ===== СЕТКА ===== */
.grid {
    display: grid;
    gap: 2rem;
}

.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));
}

/* ===== ФОРМА ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--accent-color);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

.form-select option {
    background: var(--background-color);
    color: var(--text-color);
    padding: 10px;
    border: none;
}

.form-select option:hover {
    background: var(--secondary-color);
    color: var(--text-color);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 0 3px rgba(255, 111, 89, 0.2);
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.form-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--secondary-color);
    margin-top: 2px;
}

.form-checkbox label {
    font-size: 0.9rem;
    line-height: 1.4;
    cursor: pointer;
}

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

.form-checkbox a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* ===== FOOTER ===== */
.footer {
    background: rgba(0, 0, 0, 0.8);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

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

.footer-section h3 {
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    margin-bottom: 0.5rem;
    display: block;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: rgba(255, 255, 255, 0.5);
}

/* ===== COOKIE BANNER ===== */
.cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(5, 5, 5, 0.98);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    z-index: 10000;
    display: none;
    animation: slideInUp 0.5s ease-out;
    max-width: 400px;
    margin: 0 auto;
    box-shadow: var(--shadow);
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(100px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.cookie-banner.show {
    display: block;
}

.cookie-banner h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    color: var(--accent-color);
}

.cookie-banner p {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

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

/* ===== АНИМАЦИИ ===== */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease-out forwards;
}

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

.slide-in-left {
    transform: translateX(-30px);
    opacity: 0;
    animation: slideInLeft 0.6s ease-out forwards;
}

@keyframes slideInLeft {
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.slide-in-right {
    transform: translateX(30px);
    opacity: 0;
    animation: slideInRight 0.6s ease-out forwards;
}

@keyframes slideInRight {
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ===== МЕДИАЗАПРОСЫ ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero {
        padding: 0 20px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .cookie-banner {
        bottom: 10px;
        left: 10px;
        right: 10px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content {
        padding: 0 10px;
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: 12px;
    }
    
    .card {
        padding: 1rem;
    }
}

/* ===== УТИЛИТЫ ===== */
.text-center {
    text-align: center;
}

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

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

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-90 { opacity: 0.9; }

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== ВЫСОКОЕ РАЗРЕШЕНИЕ ===== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero::before {
        background-size: 20px 20px;
    }
}