:root {
    color-scheme: light;
    --bg: #f6f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #4f46e5;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

header {
    background: linear-gradient(120deg, #4f46e5, #6366f1);
    color: white;
    padding: 32px 24px;
}

header h1 {
    margin: 0;
    font-size: 28px;
}

header p {
    margin: 8px 0 0;
    color: rgba(255, 255, 255, 0.9);
}

nav {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 2px solid transparent;
}

nav a:hover {
    border-bottom-color: white;
}

main {
    max-width: 960px;
    margin: 24px auto 64px;
    padding: 0 24px;
}

section {
    background: var(--card);
    padding: 24px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.05);
}

section+section {
    margin-top: 20px;
}

h2 {
    margin-top: 0;
}

ul {
    padding-left: 20px;
}

a {
    color: var(--primary);
}

footer {
    text-align: center;
    padding: 24px;
    color: var(--muted);
    font-size: 14px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 999px;
    background: #eef2ff;
    color: #3730a3;
    font-size: 12px;
    font-weight: 600;
    margin-right: 8px;
}

.note {
    background: #fffbeb;
    border: 1px solid #fcd34d;
    color: #92400e;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 14px;
}