:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --border: #e5e7eb;
    --success: #34a853;
    --radius: 12px;
    --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

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

a:hover {
    text-decoration: underline;
}

.container {
    width: min(960px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.logo:hover {
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, #1a73e8, #34a853);
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 18px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.nav a {
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
}

.nav a.active,
.nav a:hover {
    color: var(--primary);
    text-decoration: none;
}

.lang-switch {
    display: inline-flex;
    border: 1px solid var(--border);
    border-radius: 999px;
    overflow: hidden;
    background: var(--surface);
}

.lang-switch a {
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    text-decoration: none;
}

.lang-switch a.active {
    background: var(--primary);
    color: #fff;
}

.hero {
    padding: 56px 0 32px;
}

.hero-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.15;
}

.hero p.lead {
    margin: 0 0 24px;
    font-size: 18px;
    color: var(--muted);
    max-width: 720px;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 999px;
    background: #eef4ff;
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
}

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    border: 1px solid transparent;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border);
}

.section {
    padding: 24px 0 48px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.card h3 {
    margin: 0 0 8px;
    font-size: 18px;
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

.content-page {
    padding: 40px 0 56px;
}

.content-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
}

.content-card h1 {
    margin: 0 0 8px;
    font-size: clamp(26px, 3vw, 34px);
}

.updated {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 28px;
}

.content-card h2 {
    margin: 28px 0 10px;
    font-size: 20px;
}

.content-card p,
.content-card li {
    color: #374151;
}

.content-card ul {
    padding-left: 20px;
}

.content-card ul li {
    margin-bottom: 8px;
}

.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 24px 0;
    color: var(--muted);
    font-size: 14px;
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

@media (max-width: 640px) {
    .hero-card,
    .content-card {
        padding: 24px;
    }

    .header-inner {
        align-items: flex-start;
        flex-direction: column;
    }
}