:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1f2933;
  --muted: #6b7280;
  --accent: #2563eb;
  --danger: #dc2626;
  --ok: #047857;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .5rem;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: .8rem 1.2rem;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--ink); text-decoration: none; }
.topbar nav a {
  margin-left: 1rem;
  color: var(--accent);
  text-decoration: none;
  font-size: .92rem;
}
.topbar nav a:hover { text-decoration: underline; }

.container { max-width: 880px; margin: 2rem auto; padding: 0 1.2rem; }

h1 { font-size: 1.5rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }

.form {
  display: flex;
  flex-direction: column;
  gap: .9rem;
  max-width: 420px;
  background: var(--card);
  padding: 1.4rem;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.form.inline { flex-direction: row; align-items: flex-end; max-width: none; }
.form label { display: flex; flex-direction: column; gap: .3rem; font-size: .9rem; color: var(--muted); }
.form input, .form select {
  padding: .55rem .65rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-size: 1rem;
}
button, .btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: 0;
  padding: .55rem 1rem;
  border-radius: 7px;
  font-size: .95rem;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { opacity: .92; }
.link-danger { background: none; color: var(--danger); padding: 0; }

.alert { padding: .7rem 1rem; border-radius: 8px; margin: 1rem 0; }
.alert.success { background: #ecfdf5; color: var(--ok); border: 1px solid #a7f3d0; }
.alert.error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

.tbl { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; }
.tbl th, .tbl td { text-align: left; padding: .65rem .8rem; border-bottom: 1px solid var(--border); font-size: .92rem; }
.tbl th { background: #f9fafb; color: var(--muted); font-weight: 600; }

.cards { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  min-width: 180px;
  text-align: center;
}
.card .big { font-size: 2.2rem; font-weight: 700; color: var(--accent); }
.card .btn { margin-top: .8rem; }

.foot { text-align: center; color: var(--muted); font-size: .82rem; padding: 2rem 1rem; }