:root {
  --bg: #f6f3ee;
  --ink: #1c1917;
  --accent: #0f766e;
  --muted: #78716c;
  --line: #e7e5e4;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at 0% 0%, #d9f3ef 0, transparent 45%),
    linear-gradient(180deg, #faf8f5, var(--bg));
  color: var(--ink);
}
.panel {
  padding: 16px;
}
h1 {
  font-size: 18px;
  margin: 0 0 8px;
}
.muted { color: var(--muted); font-size: 12px; }
.hidden { display: none; }
.row, .field {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0;
}
.field { flex-direction: column; align-items: stretch; }
input[type="number"] {
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
}
button {
  width: 100%;
  margin-top: 8px;
  padding: 10px 12px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}
button.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}