* { box-sizing: border-box; }
body {
    font-family: -apple-system, system-ui, Segoe UI, Roboto, sans-serif;
    margin: 0;
    background: #f5f6fa;
    color: #1f2937;
}
main.dashboard {
    max-width: 960px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
main.card, .card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
main.card {
    max-width: 420px;
    margin: 4rem auto;
}
h1, h2 { margin-top: 0; }
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: #1f2937;
    color: white;
}
.topbar a.link, .topbar button.link {
    background: none;
    border: 1px solid #93c5fd;
    color: #e5e7eb;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
}
.topbar a.link:hover, .topbar button.link:hover {
    background: #374151;
    color: #ffffff;
}
form label {
    display: block;
    margin-bottom: 0.75rem;
}
form input {
    width: 100%;
    padding: 0.5rem;
    margin-top: 0.25rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
}
button {
    padding: 0.5rem 1.25rem;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}
button.link {
    background: none;
    color: #dc2626;
    padding: 0;
    margin-left: 0.5rem;
}
.error { color: #b91c1c; }
.notice { color: #047857; }
.subtitle { color: #6b7280; margin-top: -0.5rem; }
pre { background: #111827; color: #f9fafb; padding: 1rem; border-radius: 6px; white-space: pre-wrap; }
ul { list-style: none; padding: 0; }
li { padding: 0.25rem 0; border-bottom: 1px dashed #e5e7eb; }