:root {
    --primary-color: #00A1D6;
    --secondary-color: #FB7299;
    --text-color: #212121;
    --text-light: #666666;
    --bg-color: #FFFFFF;
    --bg-alt: #F4F5F7;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-alt);
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo img {
    height: 32px;
    width: 32px;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #e3f5ff 0%, #fff0f5 100%);
    padding: 6rem 2rem;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 161, 214, 0.3);
    transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 161, 214, 0.4);
    background-color: #0092c2;
}

.cta-secondary {
    background-color: white;
    color: var(--text-color);
    margin-left: 1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.cta-secondary:hover {
    background-color: #f8f8f8;
}

/* Features Grid */
.features {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
    border: 1px solid rgba(0,0,0,0.02);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--text-light);
}

/* Download Section */
.download-section {
    background-color: white;
    padding: 5rem 2rem;
    text-align: center;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.download-card {
    background: var(--bg-alt);
    padding: 2rem;
    border-radius: 12px;
    width: 300px;
    text-align: left;
}

.download-card h3 {
    margin-bottom: 0.5rem;
}

.download-card .tag {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.download-card ul {
    margin: 1rem 0 2rem 1.2rem;
    color: var(--text-light);
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 3rem 2rem;
    text-align: center;
}

.footer-links {
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: #bdc3c7;
    margin: 0 1rem;
}

.footer-links a:hover {
    color: white;
}

.copyright {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
}