/* Root variables for consistent branding */
:root {
    --primary-color: #1a73e8;
    --text-color: #3c4043;
    --bg-color: #f8f9fa;
    --link-color: #1a0dab;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
}

header {
    background-color: #fff;
    padding: 15px 0;
    border-bottom: 1px solid #dadce0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

h1 {
    font-size: 2.8rem;
    font-weight: 500;
    color: #202124;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.hero {
    text-align: center;
    padding: 80px 20px;
    background: #fff;
    margin-bottom: 30px;
}

.hero p.subtitle {
    font-size: 1.4rem;
    color: #5f6368;
    max-width: 600px;
    margin: 0 auto 30px;
}

.download-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 14px 45px;
    font-size: 1.15rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.2s, box-shadow 0.2s;
}

.download-btn:hover {
    background-color: #185abc;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.update-info {
    margin-top: 15px;
    font-size: 0.85rem;
    color: #70757a;
}

.section-title {
    font-size: 2rem;
    margin: 40px 0 20px;
    color: #202124;
    text-align: center;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 40px 0;
}

.feature-item {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    border: 1px solid #dadce0;
}

.feature-item h3 {
    margin-top: 0;
    color: #202124;
    font-size: 1.3rem;
}

.content-block {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    margin-bottom: 30px;
    border: 1px solid #dadce0;
}

.content-block h2 {
    color: #202124;
    border-bottom: 2px solid var(--primary-color);
    display: inline-block;
    padding-bottom: 5px;
    margin-bottom: 20px;
}

.faq-list dt {
    font-weight: 600;
    color: #202124;
    margin-top: 20px;
}

.faq-list dd {
    margin-left: 0;
    color: #5f6368;
    margin-bottom: 10px;
}

footer {
    padding: 60px 0;
    background-color: #f1f3f4;
    color: #70757a;
    font-size: 0.85rem;
    text-align: center;
    border-top: 1px solid #dadce0;
}

.footer-links {
    margin-top: 20px;
}

.footer-links a {
    color: #70757a;
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    .hero { padding: 40px 10px; }
    .hero p.subtitle { font-size: 1.1rem; }
}