:root {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --ink: #0f1720;
  --muted: #4b5b68;
  --accent: #0a6c74;
  --accent-2: #094f54;
  --ok: #136f3a;
  --warn: #934a00;
  --error: #a91414;
  --line: #d9e2e7;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #ecf4f6 0%, var(--bg) 100%);
  color: var(--ink);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

header {
  background: linear-gradient(120deg, #083d42, #0a6c74);
  color: #fff;
  padding: 16px;
  position: sticky;
  top: 0;
}

.nav {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  gap: 16px;
  align-items: center;
}

.nav .title {
  margin-right: auto;
  font-weight: 700;
}

main {
  max-width: 1000px;
  margin: 24px auto;
  padding: 0 16px 40px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 6px 16px rgba(10, 60, 70, 0.06);
}

.grid {
  display: grid;
  gap: 12px;
}

.grid.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: block;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 6px;
}

input, select, textarea, button {
  width: 100%;
  border-radius: 8px;
  border: 1px solid #bfd0d8;
  font: inherit;
  padding: 10px 12px;
}

button {
  background: var(--accent);
  color: #fff;
  border: 0;
  cursor: pointer;
  font-weight: 600;
}

button:hover { background: var(--accent-2); }
button.secondary { background: #e9f2f5; color: #0f1720; border: 1px solid #bfd0d8; }
button.warning { background: #b55b00; }
button.success { background: var(--ok); }

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eaf3f7;
  color: #183a45;
  margin-right: 6px;
}

.kv {
  margin: 6px 0;
  color: var(--muted);
}

.notice, .error {
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.notice { background: #eef8f0; border: 1px solid #b9e1c0; color: #1c5630; }
.error { background: #fdeeee; border: 1px solid #f3bcbc; color: var(--error); }

.row {
  display: flex;
  gap: 10px;
}

.row > * { flex: 1; }

.right { text-align: right; }

@media (max-width: 720px) {
  .grid.cols-2 { grid-template-columns: 1fr; }
  .row { flex-direction: column; }
}