:root {
    --bg: #0f1115;
    --surface: #161a22;
    --border: #232936;
    --text: #e6e9ef;
    --muted: #8a93a6;
    --primary: #25d366;
    --primary-hover: #1faa53;
    --link: #5aa9ff;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.logo {
    font-weight: 700;
    font-size: 20px;
    color: var(--text);
}

.site-header nav {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

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

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

/* Hero */
.hero {
    padding: 80px 0 60px;
    text-align: center;
    background:
        radial-gradient(circle at 50% 0%, rgba(37, 211, 102, 0.12), transparent 60%),
        var(--bg);
}

.hero h1 {
    font-size: 42px;
    margin: 0 0 16px;
    line-height: 1.2;
}

.hero .lead {
    font-size: 18px;
    color: var(--muted);
    max-width: 720px;
    margin: 0 auto 32px;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary);
    color: #0a0d12;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
}

.btn:hover {
    background: var(--primary-hover);
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    background: var(--surface);
}

/* Features grid */
.features {
    padding: 60px 0;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
}

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

.card p {
    margin: 0;
    color: var(--muted);
}

/* Content pages */
.content {
    padding: 48px 24px 80px;
    max-width: 820px;
}

.content h1 {
    font-size: 34px;
    margin: 0 0 8px;
}

.content h2 {
    font-size: 22px;
    margin: 32px 0 12px;
    padding-top: 8px;
}

.content p,
.content li {
    color: #c8cdd9;
}

.content ul,
.content ol {
    padding-left: 24px;
}

.content li {
    margin-bottom: 6px;
}

.muted {
    color: var(--muted);
    font-size: 14px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 32px 0;
    margin-top: 60px;
    color: var(--muted);
    font-size: 14px;
    text-align: center;
}

.site-footer a {
    color: var(--muted);
}

.site-footer p {
    margin: 4px 0;
}

/* Mobile */
@media (max-width: 600px) {
    .hero h1 {
        font-size: 30px;
    }

    .hero .lead {
        font-size: 16px;
    }
}