:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --text: #1b2430;
  --muted: #6b7785;
  --line: #dde3ea;
  --accent: #1f6feb;
  --danger: #c0392b;
  --warn: #a86212;
  --ok: #1e7d4f;
}

* { box-sizing: border-box; }

/* display: grid/flex は hidden 属性より強いため、明示的に打ち消す */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  padding: 16px 16px calc(32px + env(safe-area-inset-bottom));
  display: grid;
  gap: 16px;
}

h1 { font-size: 1.25rem; margin: 8px 0 0; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  display: grid;
  gap: 14px;
}

.field { display: grid; gap: 6px; }
.field__label { font-size: 0.875rem; color: var(--muted); }
.field__hint { font-size: 0.75rem; color: var(--muted); }

input, select {
  width: 100%;
  padding: 12px;
  font-size: 1.125rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}

input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.presets { display: flex; gap: 8px; }
.risk-preset {
  flex: 1;
  padding: 10px 0;
  font-size: 0.9375rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}
.risk-preset[aria-pressed="true"] {
  border-color: var(--accent);
  background: #e8f1fe;
  color: var(--accent);
  font-weight: 600;
}

.result__lot {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.result__lot-label { font-size: 0.875rem; color: var(--muted); }
.result__lot-value { font-size: 2.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }

.result__list { margin: 0; display: grid; gap: 10px; }
.result__row { display: flex; justify-content: space-between; gap: 12px; }
.result__row dt { font-size: 0.875rem; color: var(--muted); }
.result__row dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.result__row small { display: block; font-size: 0.75rem; color: var(--muted); }
.result__row[hidden] { display: none; }

.messages { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.messages:empty { display: none; }
.messages li { padding: 10px 12px; border-radius: 8px; font-size: 0.875rem; }
.messages--error li { background: #fdecea; color: var(--danger); }
.messages--warn li { background: #fdf3e3; color: var(--warn); }

.note { margin: 0; font-size: 0.75rem; color: var(--muted); }

summary { cursor: pointer; font-size: 0.9375rem; font-weight: 600; }