/* Landing Page Styles */

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    /* Градиент используется как fallback, если нет фонового изображения */
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Если есть фоновое изображение, оно перекрывает градиент */
.hero-section[style*="background-image"] {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 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;
    z-index: 1;
}

/* Feature Cards */
.feature-card {
    background: var(--surface-card, #fff);
    border-radius: var(--radius-lg, 12px);
    box-shadow: var(--shadow-md, 0 4px 6px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--surface-border, #e0e0e0);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg, 0 8px 16px rgba(0, 0, 0, 0.15));
}

.feature-icon {
    color: var(--color-primary, #2563eb);
}

/* Stat Cards */
.stat-card {
    background: var(--surface-card, #fff);
    border-radius: var(--radius-lg, 12px);
    box-shadow: var(--shadow-md, 0 4px 6px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--surface-border, #e0e0e0);
    height: 100%;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg, 0 8px 16px rgba(0, 0, 0, 0.15));
}

.stat-icon {
    color: var(--color-primary, #2563eb);
}

.stat-number {
    font-size: 2.5rem;
    color: var(--text-strong, #1a1a1a);
    font-weight: 700;
}

/* Navigation */
.navbar {
    background: rgba(0, 0, 0, 0.9) !important;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: color 0.3s ease;
    font-weight: 500;
}

.navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 1) !important;
}

/* Sections */
section {
    padding: 4rem 0;
}

section.bg-light {
    background-color: var(--surface-bg, #f8f9fa) !important;
}

section.bg-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
}

/* Buttons */
.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-md, 8px);
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--color-primary, #2563eb);
    border: none;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: var(--color-primary-hover, #1d4ed8);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(37, 99, 235, 0.4);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: white;
    background: transparent;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: white;
    color: white;
}

/* Footer */
footer {
    background: var(--surface-dark, #1a1a1a) !important;
    color: rgba(255, 255, 255, 0.8);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }
    
    .hero-section .lead {
        font-size: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    section {
        padding: 2rem 0;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Text colors */
.text-muted {
    color: var(--text-muted, #6c757d) !important;
}

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

.stat-card,
.feature-card {
    animation: fadeInUp 0.6s ease-out;
}

.stat-card:nth-child(1) { animation-delay: 0.1s; }
.stat-card:nth-child(2) { animation-delay: 0.2s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }
.stat-card:nth-child(4) { animation-delay: 0.4s; }

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }