/* Minimal, clean styling in white/grey per user's preference */
:root {
  --bg: #ffffff;
  --fg: #222222;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #374151;
  --accent-2: #9ca3af;
  --ok: #16a34a;
  --warn: #b45309;
  --err: #dc2626;
}
* { box-sizing: border-box; }
html, body { margin:0; padding:0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
.container { max-width: 900px; margin: 0 auto; padding: 24px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 24px; box-shadow: 0 1px 4px rgba(0,0,0,0.04); }
h1 { font-size: 26px; margin: 0 0 16px; }
h2 { font-size: 20px; margin: 24px 0 8px; }
p.muted { color: var(--muted); margin: 4px 0 16px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.row-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
@media (max-width: 720px) { .row, .row-3, .row-4 { grid-template-columns: 1fr; } }
label { display:block; font-weight: 600; margin-bottom: 6px; }
input[type="text"], input[type="email"], input[type="number"], textarea, select {
  width: 100%; padding: 12px 14px; border:1px solid var(--line); border-radius: 12px; outline: none;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type="number"] { -moz-appearance: textfield; }
fieldset { border:1px solid var(--line); border-radius: 14px; padding: 16px; }
legend { padding: 0 8px; font-weight:700; color: var(--accent); }
.inline { display:flex; align-items:center; gap:10px; flex-wrap: wrap; }
hr { border:0; border-top:1px solid var(--line); margin: 20px 0; }
button {
  appearance: none; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; padding: 12px 16px;
  border-radius: 12px; font-weight: 700; cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
.small { font-size: 14px; color: var(--muted); }
.error { color: var(--err); font-size: 14px; margin-top: 6px; display:none; }
.success { color: var(--ok); }
.hint { color: var(--muted); font-size: 12px; }
.badge { display:inline-block; border:1px solid var(--line); padding:4px 8px; border-radius:999px; color: var(--muted); font-size:12px; }
.total { font-weight: 800; font-size: 18px; }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }
.hidden { display: none !important; }