:root {
    --bg: #f6f7f9;
    --card: #ffffff;
    --ink: #1f2933;
    --muted: #647084;
    --accent: #8c1515; /* Harvard crimson */
    --border: #e2e6ec;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
        Arial, sans-serif;
    line-height: 1.5;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 2rem 1.25rem 3rem;
}

header h1 {
    margin: 0;
    color: var(--accent);
    font-size: 1.6rem;
}

header p {
    margin: 0.25rem 0 1.5rem;
    color: var(--muted);
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.card h2 { margin-top: 0; }

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    background: #f0f2f5;
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    font-size: 0.95em;
    word-break: break-all;
}

.assignments {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.assignments a {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    text-decoration: none;
    color: var(--accent);
}

.button {
    display: inline-block;
    margin: 0.5rem 0;
    padding: 0.6rem 1.1rem;
    background: var(--accent);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
}

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

.note {
    margin-top: 1rem;
    padding: 0.85rem 1rem;
    background: #fbf4f4;
    border: 1px solid #f0dede;
    border-radius: 8px;
    font-size: 0.92rem;
    color: var(--muted);
}

.blocked h2 { color: var(--accent); }

footer {
    margin-top: 2rem;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
}