:root {
    --bg: #f6f8fb;
    --surface: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --border: #e5e7eb;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --radius: 16px;
    --max-width: 1100px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(180deg, #f8fbff 0%, #f6f8fb 100%);
    color: var(--text);
}

body {
    line-height: 1.6;
}

.container {
    width: min(100% - 2rem, var(--max-width));
    margin: 0 auto;
}

.site-header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    flex-wrap: wrap;
}

.brand {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.nav a {
    text-decoration: none;
    color: var(--text);
    padding: 0.5rem 0.8rem;
    border-radius: 999px;
    transition: 0.2s ease;
}

.nav a:hover,
.nav a.active {
    background: #e8f0ff;
    color: var(--primary);
}

.hero {
    padding: 4rem 0;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    margin: 0.5rem 0 1rem;
}

.tag {
    display: inline-block;
    background: #e8f0ff;
    color: var(--primary);
    padding: 0.4rem 0.8rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
}

.lead {
    font-size: 1.15rem;
    color: var(--muted);
    margin-bottom: 1rem;
}

.actions {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    text-decoration: none;
    padding: 0.85rem 1.2rem;
    border-radius: 12px;
    font-weight: 600;
    transition: 0.2s ease;
}

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

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

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

.btn-secondary:hover {
    background: #f9fafb;
}

.hero-card {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.hero-card h2 {
    margin-top: 0;
    font-size: 1.25rem;
}

.hero-card ol {
    padding-left: 1.2rem;
    margin: 0;
}

.hero-card li + li {
    margin-top: 0.75rem;
}

@media (max-width: 800px) {
    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero {
        padding: 2.5rem 0;
    }

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