:root {
  color-scheme: light;
  --color-bg: #f7f2ee;
  --color-surface: #ffffff;
  --color-border: #d9dce1;
  --color-text: #213228;
  --color-muted: #6b7280;
  --color-primary: #7a1321;
  --color-primary-hover: #5c0e19;
  --color-danger: #c1272d;
  --color-selected: #f3dfe2;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  --font-heading: "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  font-family: var(--font-body);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: var(--color-bg);
  background-image: url("bg_noise.webp");
  background-repeat: repeat;
  color: var(--color-text);
  line-height: 1.6;
}

.form-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 16px 96px;
}

h1 {
  font-family: var(--font-heading);
  font-size: 2.1rem;
  color: var(--color-primary);
  margin-bottom: 24px;
}

h2 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.page > h2:first-of-type {
  margin-top: 8px;
}

.field {
  background: rgba(255, 255, 255, 0.55);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 16px;
}

.field-row {
  display: flex;
  gap: 12px;
}

.field-row .field {
  flex: 1;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.help {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: -4px 0 10px;
}

.required {
  color: var(--color-danger);
  font-size: 0.75rem;
  font-weight: 700;
  margin-left: 4px;
}

.optional {
  color: var(--color-muted);
  font-size: 0.75rem;
  font-weight: 600;
  margin-left: 4px;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="number"],
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

.radio-group,
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--color-primary);
}

.radio-group label,
.checkbox-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 400;
  margin-bottom: 0;
}

.checkbox-group-break {
  flex-basis: 100%;
  height: 0;
}

.field[hidden] {
  display: none;
}

.period-picker {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.calendar {
  flex: 1 1 340px;
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px;
}

.calendar-month {
  margin-bottom: 16px;
}

.calendar-month h3 {
  font-size: 0.9rem;
  margin: 4px 0 8px;
  text-align: center;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.calendar-weekday {
  text-align: center;
  font-size: 0.7rem;
  color: var(--color-muted);
  padding: 2px 0;
}

.calendar-day {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  text-align: center;
  font-size: 0.8rem;
  min-height: 34px;
  padding: 6px 0;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
  background: #fafafa;
}

.calendar-day .day-label {
  font-size: 0.6rem;
  line-height: 1;
}

.calendar-day.outside-month {
  color: var(--color-muted);
  background: transparent;
}

.calendar-day.disabled {
  color: var(--color-muted);
  background: transparent;
  cursor: not-allowed;
  opacity: 0.5;
}

.calendar-day.disabled:hover {
  background: transparent;
}

.calendar-day.soldout {
  color: var(--color-muted);
  background: #d9d9d9;
  cursor: not-allowed;
}

.calendar-day.soldout .day-label {
  font-weight: 700;
}

.calendar-day.soldout:hover {
  background: #d9d9d9;
}

.calendar-day.selected {
  background: var(--color-selected);
  font-weight: 700;
  outline: 2px solid var(--color-primary);
}

.calendar-day:hover {
  background: var(--color-selected);
}

.box-list {
  flex: 1 1 260px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.box-card {
  border: 1px solid var(--color-primary);
  background: #fff;
  border-radius: 6px;
  padding: 10px 12px;
}

.box-card .box-range {
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.box-list-empty {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.consent-note {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.consent-note a {
  color: var(--color-primary);
}

.page-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
}

button {
  font-family: inherit;
  font-size: 1rem;
  padding: 12px 24px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
}

.next-page,
#submit-button {
  background: var(--color-primary);
  color: #fff;
  margin-left: auto;
  display: block;
}

.next-page:hover,
#submit-button:hover {
  background: var(--color-primary-hover);
}

.prev-page {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.error-summary {
  background: #fdecea;
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.result {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

.result.success {
  border-color: var(--color-primary);
}

.result.error {
  border-color: var(--color-danger);
}