:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --ink: #1c1c1e;
  --muted: #6b7280;
  --line: #d1d5db;
  --brand: #06c755; /* LINE green */
  --err: #d92d20;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "Noto Sans Thai", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
.card {
  max-width: 560px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}
h1 { font-size: 1.4rem; margin: 8px 0 4px; }
.status { color: var(--muted); font-size: 0.85rem; margin: 0 0 12px; min-height: 1.2em; }
fieldset {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 0 0 16px;
  padding: 14px 14px 4px;
  background: var(--card);
}
legend { font-weight: 600; padding: 0 6px; }
label { display: block; margin-bottom: 12px; font-size: 0.9rem; }
input, textarea {
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.row { display: flex; gap: 12px; }
.row label { flex: 1; }
.req { color: var(--err); }
.hint { font-size: 0.8rem; color: var(--muted); margin: 0 0 12px; }
.rules { font-size: 0.85rem; color: var(--muted); padding-left: 20px; margin: 4px 0 12px; }
.checkbox { display: flex; align-items: flex-start; gap: 8px; }
.checkbox input { width: auto; margin-top: 2px; }
.errors {
  color: var(--err);
  background: #fef3f2;
  border: 1px solid #fecdca;
  border-radius: 8px;
  padding: 10px 14px 10px 30px;
  margin: 0 0 16px;
  font-size: 0.88rem;
}
button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
}
button:disabled { opacity: 0.55; cursor: default; }
.done {
  text-align: center;
  padding: 32px 16px;
}
.done .check { font-size: 3rem; }
.locked { background: #f3f4f6; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-bottom: 16px; font-size: 0.9rem; display: grid; gap: 4px; }
.slot { display: flex; align-items: center; gap: 10px; background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 8px; cursor: pointer; }
.slot input { width: auto; margin: 0; }