/* Основные стили */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --dark-color: #1f2937;
    --dark-light: #374151;
    --light-color: #f9fafb;
    --light-gray: #f3f4f6;
    --border-color: #e5e7eb;
    --text-color: #374151;
    --text-light: #6b7280;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background-color: var(--light-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Кнопки */
.btn-primary, .btn-secondary, .btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    font-size: 16px;
    position: relative;
    overflow: hidden;
}

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

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

.btn-primary:active {
    transform: translateY(0);
}

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

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

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

.btn-login:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
    border-radius: 12px;
}

.btn-block {
    width: 100%;
    text-align: center;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

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

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

/* Header */
.header {
    background: var(--white);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.navbar {
    padding: 1.25rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: transform 0.3s;
}

.logo:hover {
    transform: scale(1.05);
}

.logo i {
    font-size: 32px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s;
}

.nav-links a:not(.btn-primary):not(.btn-login):hover {
    color: var(--primary-color);
    background: var(--light-gray);
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" 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;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 48px;
    opacity: 0.95;
    line-height: 1.6;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

/* Sections */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    color: var(--dark-color);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* About Section */
.about-section {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.about-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.about-card:hover::before {
    transform: scaleX(1);
}

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

.icon-box {
    width: 90px;
    height: 90px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: white;
    font-size: 36px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s;
}

.about-card:hover .icon-box {
    transform: scale(1.1) rotate(5deg);
}

.about-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--dark-color);
    font-weight: 700;
}

.about-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* Program Section */
.program-section {
    background: var(--light-gray);
}

.program-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.program-item {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 32px;
    background: var(--white);
    border-radius: 16px;
    transition: all 0.3s;
    border: 2px solid transparent;
    box-shadow: var(--shadow-sm);
}

.program-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
    transform: translateX(8px);
}

.program-number {
    font-size: 56px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 100px;
    text-align: center;
}

.program-content h3 {
    font-size: 26px;
    margin-bottom: 12px;
    color: var(--dark-color);
    font-weight: 700;
}

.program-content p {
    color: var(--text-light);
    font-size: 16px;
}

/* Pricing Section */
.pricing-section {
    background: var(--white);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.pricing-card {
    background: var(--white);
    border-radius: 20px;
    padding: 48px 40px;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid var(--border-color);
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.pricing-card:hover::before {
    transform: scaleX(1);
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.pricing-card.featured {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured::before {
    transform: scaleX(1);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-10px);
}

.pricing-card.featured .badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gradient-primary);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    box-shadow: var(--shadow-md);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
}

.pricing-header h3 {
    font-size: 28px;
    margin-bottom: 24px;
    color: var(--dark-color);
    font-weight: 700;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 6px;
    margin-bottom: 12px;
}

.amount {
    font-size: 56px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.currency {
    font-size: 28px;
    color: var(--text-light);
    font-weight: 600;
}

.price-period {
    color: var(--text-light);
    margin-bottom: 12px;
    font-size: 16px;
}

.price-save {
    color: var(--success-color);
    font-weight: 700;
    font-size: 18px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--text-color);
}

.pricing-features i {
    color: var(--success-color);
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 22px;
    font-weight: 700;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Alerts */
.alert {
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

.alert i {
    font-size: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .nav-links {
        gap: 4px;
    }
    
    .nav-links a {
        padding: 6px 12px;
        font-size: 14px;
    }
    
    .pricing-card.featured {
        transform: scale(1);
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-10px);
    }
    
    .program-item {
        flex-direction: column;
        text-align: center;
    }
    
    .program-number {
        min-width: auto;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons a {
        width: 100%;
    }
}