* { box-sizing: border-box; }
body {
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    background: #f5f6fa;
    color: #222;
}
.topbar {
    background: #1a202c;
    color: #fff;
    padding: 12px 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
}
.topbar .logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: #fff;
    text-decoration: none;
}
.topbar nav { display: flex; flex-wrap: wrap; gap: 12px; margin-left: auto; }
.topbar nav a, .topbar nav .btn-link {
    color: #cbd5e0;
    text-decoration: none;
    font-size: 0.9rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.topbar nav a:hover, .topbar nav .btn-link:hover { color: #fff; }
.inline-form { display: inline; }
.container {
    max-width: 960px;
    margin: 24px auto;
    padding: 0 16px;
}
h1, h2, h3 { color: #1a202c; }
.card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.btn {
    display: inline-block;
    padding: 10px 16px;
    background: #3182ce;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
}
.btn:hover { background: #2c5282; }
.btn-secondary { background: #718096; }
.btn-danger { background: #e53e3e; }
.btn-ghost { background: transparent; color: #3182ce; border: 1px solid #3182ce; }
input, select, textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid #cbd5e0;
    border-radius: 6px;
    font-size: 0.95rem;
    margin-top: 4px;
}
label { display: block; margin-top: 12px; font-size: 0.9rem; color: #4a5568; }
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 8px; border-bottom: 1px solid #e2e8f0; text-align: left; }
.flex { display: flex; gap: 12px; align-items: center; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.muted { color: #718096; font-size: 0.85rem; }
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    background: #edf2f7;
    font-size: 0.75rem;
}
.badge-green { background: #c6f6d5; color: #22543d; }
.badge-red { background: #fed7d7; color: #742a2a; }
.badge-blue { background: #bee3f8; color: #2a4365; }
.error { color: #c53030; margin-top: 8px; }