:root {
    --primary-color: #FF6B35;
    --secondary-color: #00D9FF;
    --background: #FAFAFA;
    --surface: #FFFFFF;
    --text: #0A1128;
    --accent: #FFD23F;
    
    --gradient-primary: linear-gradient(135deg, #FF6B35 0%, #FF8C5A 50%, #FFB88C 100%);
    --gradient-secondary: linear-gradient(90deg, #FF6B35 0%, #FFD23F 100%);
    --gradient-tertiary: linear-gradient(135deg, #FF6B35 0%, #FFD23F 100%);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 4px 16px rgba(255, 107, 53, 0.3);
    
    --transition: all 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
    
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    --border-radius-pill: 28px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'SF Pro Display', 'Inter', system-ui, sans-serif;
    background: var(--background);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 56px;
    font-weight: 800;
}

h2 {
    font-size: 36px;
}

h3 {
    font-size: 24px;
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: 18px;
    line-height: 1.7;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

img {
    max-width: 100%;
    height: auto;
}

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

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

.lang-toggle-btn {
    padding: 8px 20px;
    border: 2px solid var(--primary-color);
    background: var(--surface);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    border-radius: var(--border-radius-pill);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    min-width: 60px;
}

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

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

footer {
    background: #F5F5F5;
    color: #4A5568;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
    list-style: none;
}

.footer-links a {
    color: #4A5568;
    font-size: 14px;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-links a.modal-link {
    text-decoration: underline;
    text-decoration-color: var(--secondary-color);
}

.footer-contact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
    font-size: 14px;
}

.footer-contact a {
    color: #4A5568;
    display: flex;
    align-items: center;
    gap: 6px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #E2E8F0;
    font-size: 13px;
}

.footer-disclaimer {
    margin-top: var(--spacing-sm);
    opacity: 0.7;
    font-size: 12px;
}

main {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.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));
}

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

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    h3 {
        font-size: 20px;
    }
    
    p {
        font-size: 16px;
    }
    
    .nav-menu {
        display: none;
    }
    
    main {
        padding-top: 70px;
        padding-bottom: 80px;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
}