:root {
    --primary: #2176D0;
    --text: #1f2937;
    --muted: #6b7280;
    --bg: #f9fafb;
    --card: #ffffff;
    --border: #e5e7eb;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 24px;
}
.back:hover { color: var(--primary); }

h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.lead {
    color: var(--muted);
    font-size: 15px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin-top: 32px;
    margin-bottom: 10px;
}

p { margin-bottom: 12px; }
ul { margin: 12px 0 12px 24px; }
li { margin-bottom: 6px; }

.highlight {
    background: rgba(33, 118, 208, 0.08);
    border-left: 3px solid var(--primary);
    padding: 14px 18px;
    border-radius: 6px;
    margin: 16px 0;
}
.highlight p:last-child { margin-bottom: 0; }

.placeholder {
    display: inline-block;
    padding: 1px 8px;
    background: rgba(245, 166, 35, 0.12);
    border: 1px solid rgba(245, 166, 35, 0.4);
    color: #8a5d10;
    border-radius: 4px;
    font-size: 13px;
    font-family: ui-monospace, SFMono-Regular, monospace;
}

a { color: var(--primary); }
a:hover { text-decoration: underline; }

code {
    font-family: ui-monospace, SFMono-Regular, monospace;
    font-size: 0.92em;
    padding: 1px 5px;
    background: rgba(33, 118, 208, 0.06);
    border-radius: 3px;
}