/* Современные CSS переменные для консистентности */
:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --gray-100: #f3f4f6;
    --gray-500: #6b7280;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-sm: 0.875rem;
    --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;
    
    --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);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    --border-radius-2xl: 1.5rem;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Базовые стили */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-800);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* Улучшенная навигация */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.navbar-brand {
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--primary-color) !important;
    text-decoration: none;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--primary-dark) !important;
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700) !important;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
}

.nav-link:hover {
    color: var(--primary-color) !important;
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

/* Герой секция */
.hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
    color: white;
    padding: 6rem 2rem;
    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 xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/></svg>');
    opacity: 0.3;
}

.hero h1 {
    font-weight: 800;
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.hero .lead {
    font-size: var(--font-size-xl);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
    opacity: 0.95;
}

/* Контент секции */
.content-section {
    padding: 4rem 1rem;
    position: relative;
}

.content-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-2xl);
    margin: 1rem;
    z-index: -1;
}

/* Карточки */
.card {
    border: none;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
}

/* Специальные стили для карточек тарифов */
.pricing-card {
    min-height: 500px;
}

.pricing-card .card-body {
    height: 100%;
}

.pricing-card .list-unstyled {
    min-height: 200px;
}

/* Популярная карточка */
.popular-card {
    transform: scale(1.05);
    z-index: 10;
    border: 2px solid var(--warning-color);
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.3);
}

.popular-card:hover {
    transform: translateY(-8px) scale(1.07);
}

/* Бейдж "Популярный" */
.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 20;
}

.popular-badge .badge {
    font-size: 0.9rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    animation: pulse 2s infinite;
}

.popular-badge .badge i {
    animation: bounce 1s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-3px);
    }
    60% {
        transform: translateY(-2px);
    }
}

.card-title {
    color: var(--primary-color);
    font-weight: 700;
    font-size: var(--font-size-2xl);
    margin-bottom: 1rem;
}

.card-price {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--gray-900);
    margin: 1.5rem 0;
}

.card-price span {
    font-size: var(--font-size-lg);
    color: var(--gray-500);
    font-weight: 500;
}

/* Кнопки */
.btn {
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    padding: 0.75rem 2rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.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: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}

/* Иконки */
.fas, .far, .fab {
    transition: var(--transition);
}

.text-primary {
    color: var(--primary-color) !important;
}

/* Секции с особенностями */
.feature-section {
    padding: 3rem 0;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: var(--transition);
}

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

.feature-icon i {
    font-size: 2rem;
    color: white;
}

/* Футер */
.footer {
    background: linear-gradient(135deg, var(--gray-800), var(--gray-900));
    color: white;
    padding: 3rem 0;
    margin-top: 4rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

.footer a:hover {
    color: white;
    text-decoration: underline;
    transform: translateY(-1px);
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fadeInRight {
    animation: fadeInRight 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Адаптивность */
@media (max-width: 768px) {
    .hero {
        padding: 4rem 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .content-section {
        padding: 2rem 1rem;
    }
    
    .card {
        margin-bottom: 2rem;
    }
    
    .navbar-nav {
        text-align: center;
        margin-top: 1rem;
    }
    
    .nav-link {
        padding: 0.75rem 1rem !important;
        margin: 0.25rem 0;
    }
    
    /* Адаптивность для карточек тарифов */
    .pricing-card {
        min-height: auto;
        margin-bottom: 2rem;
    }
    
    .popular-card {
        transform: none;
        margin-bottom: 2rem;
    }
    
    .popular-card:hover {
        transform: translateY(-4px) scale(1.02);
    }
    
    .popular-badge {
        top: -12px;
    }
    
    .pricing-card .list-unstyled {
        min-height: auto;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero .lead {
        font-size: var(--font-size-lg);
    }
    
    .card-price {
        font-size: var(--font-size-3xl);
    }
    
    .btn {
        padding: 0.625rem 1.5rem;
        font-size: var(--font-size-sm);
    }
}

/* Дополнительные утилиты */
.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-glass {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.shadow-glow {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

/* Улучшения для списков */
.list-unstyled li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.list-unstyled li:hover {
    transform: translateX(5px);
}

.list-unstyled li i {
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

/* Улучшения для разделителей */
hr {
    border: none;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    margin: 3rem 0;
}

/* Скрытие скроллбара для webkit браузеров */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-color));
}