/* Caitty AI Chat Website Styles */

:root {
    /* App Theme Colors */
    --bg-primary: #0A0F14;
    --bg-secondary: #0F1A1F;
    --bg-tertiary: #1A2530;
    --accent-green: #4CAF50;
    --accent-blue: #2196F3;
    --text-primary: #FFFFFF;
    --text-secondary: #B0BEC5;
    --premium-gold: #FFD700;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Language Toggle */
.lang-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 1px solid rgba(76, 175, 80, 0.3);
    border-radius: 25px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    font-weight: 500;
}

.lang-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-green);
    transform: translateY(-2px);
}

/* Header */
header {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: 80px 20px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.logo {
    font-size: 48px;
    margin-bottom: 10px;
}

h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-green) 0%, var(--accent-blue) 100%);
    color: white;
    padding: 16px 48px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(76, 175, 80, 0.4);
}

/* Features Section */
.features {
    padding: 80px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.features h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 60px;
    color: var(--text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid rgba(76, 175, 80, 0.2);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-green);
    box-shadow: 0 10px 30px rgba(76, 175, 80, 0.2);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

/* Screenshots Section */
.screenshots {
    padding: 80px 20px;
    background: var(--bg-secondary);
    text-align: center;
}

.screenshots h2 {
    font-size: 42px;
    margin-bottom: 60px;
}

.screenshot-container {
    max-width: 400px;
    margin: 0 auto;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.screenshot-container img {
    width: 100%;
    display: block;
}

/* Footer */
footer {
    background: var(--bg-primary);
    padding: 60px 20px 30px;
    text-align: center;
    border-top: 1px solid rgba(76, 175, 80, 0.1);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

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

.copyright {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Legal Pages */
.legal-page {
    max-width: 900px;
    margin: 0 auto;
    padding: 100px 20px 80px;
}

.legal-page h1 {
    font-size: 48px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-green) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.legal-page .last-updated {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 14px;
}

.legal-content {
    background: var(--bg-secondary);
    border: 1px solid rgba(76, 175, 80, 0.2);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
}

.legal-content h2 {
    font-size: 28px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: var(--accent-green);
}

.legal-content h2:first-child {
    margin-top: 0;
}

.legal-content h3 {
    font-size: 22px;
    margin-top: 25px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.legal-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.legal-content ul,
.legal-content ol {
    color: var(--text-secondary);
    margin-left: 30px;
    margin-bottom: 15px;
}

.legal-content li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.legal-content strong {
    color: var(--text-primary);
}

.legal-content a {
    color: var(--accent-green);
    text-decoration: none;
}

.legal-content a:hover {
    text-decoration: underline;
}

/* Language Sections */
.lang-section {
    display: none;
}

.lang-section.active {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }

    .subtitle {
        font-size: 18px;
    }

    .features h2,
    .screenshots h2 {
        font-size: 32px;
    }

    .legal-page h1 {
        font-size: 36px;
    }

    .legal-content {
        padding: 30px 20px;
    }

    .footer-links {
        flex-direction: column;
        gap: 20px;
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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