:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b7280;
  --line: #d9dde3;
  --accent: #1a56db;
  --accent-dark: #16409e;
  --danger: #dc2626;
  --ok: #16a34a;
  --ok-bg: #f0fdf4;
  --err-bg: #fef2f2;
  --pending-bg: #eff6ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.head h1 {
  font-size: 22px;
  margin: 0 0 6px;
  letter-spacing: 0.02em;
}

.head .sub {
  margin: 0 0 12px;
  color: var(--muted);
}

.head .note {
  margin: 0 0 28px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: #f8fafc;
  font-size: 13.5px;
  color: #374151;
}

.card {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 20px 20px 8px;
  margin-bottom: 16px;
}

.card h2 {
  font-size: 15px;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  letter-spacing: 0.05em;
}

.field {
  margin-bottom: 16px;
}

.field > .label,
.field > label:not(.options label) {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
}

.req { color: var(--danger); }

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="password"],
select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 15px;
  background: #fff;
  color: var(--fg);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.15);
}

.phone-row {
  display: flex;
  align-items: stretch;
}

.phone-row .prefix {
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-right: 0;
  border-radius: 4px 0 0 4px;
  background: #f8fafc;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.phone-row input {
  border-radius: 0 4px 4px 0;
}

.options {
  display: flex;
  gap: 24px;
}

.options label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.field.check label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  cursor: pointer;
  font-weight: 400;
}

.hint {
  margin: 5px 0 0;
  font-size: 12.5px;
  color: var(--muted);
}

.field.invalid input,
.field.invalid select {
  border-color: var(--danger);
}

.field .err-msg {
  display: none;
  margin: 5px 0 0;
  font-size: 12.5px;
  color: var(--danger);
}

.field.invalid .err-msg { display: block; }

.actions {
  margin: 24px 0 0;
}

.actions button {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.05em;
}

.actions button:hover { background: var(--accent-dark); }

.actions button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.status {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 14px;
}

.status.pending {
  background: var(--pending-bg);
  border-color: #bfdbfe;
  color: #1d4ed8;
}

.status.ok {
  background: var(--ok-bg);
  border-color: #bbf7d0;
  color: #15803d;
}

.status.err {
  background: var(--err-bg);
  border-color: #fecaca;
  color: #b91c1c;
}

.status code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: rgba(0, 0, 0, 0.05);
  padding: 1px 6px;
  border-radius: 3px;
}

.foot {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12.5px;
}

@media (max-width: 480px) {
  .wrap { padding: 24px 14px 40px; }
  .options { gap: 16px; }
}