:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --brand: #0b3d91;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; background: var(--bg); color: var(--text); }
.header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 20px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; }
.logo { height: 44px; width: auto; }
.title { font-size: 18px; font-weight: 700; }
.subtitle { font-size: 13px; color: var(--muted); margin-top: 2px; }
.container { max-width: 860px; margin: 24px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; box-shadow: 0 4px 16px rgba(2, 6, 23, 0.06); }
h1 { margin: 0 0 8px 0; font-size: 22px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.form { display: grid; gap: 10px; margin-top: 12px; }
label { font-size: 13px; font-weight: 700; }
input, textarea, select { border: 1px solid var(--line); border-radius: 10px; padding: 10px; font-size: 14px; width: 100%; background: #fff; }
textarea { resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.col { display: grid; gap: 8px; }
.btn { background: var(--brand); color: white; border: none; border-radius: 12px; padding: 10px 14px; font-weight: 700; cursor: pointer; width: fit-content; }
.btn-secondary { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
.alert { background: #f1f5f9; border: 1px solid var(--line); padding: 10px; border-radius: 10px; }
.alert-error { background: #fff1f2; border-color: #fecdd3; color: #9f1239; }
.footer { text-align: center; color: var(--muted); padding: 18px; }