:root {
  --color-bg: #f5f8f4;
  --color-bg-soft: #e9f2ec;
  --color-panel: #ffffff;
  --color-text: #22384a;
  --color-text-muted: #5b7268;
  --color-line: #d7e3da;
  --color-accent: #b9661d;
  --color-accent-green: #3f7a52;
  --color-closed: #a9b8ae;

  --font-serif: "Shippori Mincho", "Hiragino Mincho ProN", serif;
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.8;
  letter-spacing: 0.02em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 5rem;
}

header.page-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

header.page-header h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.7rem;
  letter-spacing: 0.12em;
  color: var(--color-text);
  margin: 0 0 0.4rem;
}

header.page-header p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  margin: 0;
}

section {
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin: 0 0 1rem;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 0.6rem;
}

/* --- カレンダー --- */

.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.cal-nav button {
  background: transparent;
  border: 1px solid var(--color-line);
  color: var(--color-text);
  font-size: 0.85rem;
  padding: 0.4rem 0.9rem;
  border-radius: 3px;
  cursor: pointer;
  font-family: inherit;
}

.cal-nav button:hover:not(:disabled) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.cal-nav button:disabled {
  opacity: 0.35;
  cursor: default;
}

.cal-nav .cal-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.cal-weekday {
  text-align: center;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  padding-bottom: 0.35rem;
  letter-spacing: 0.04em;
}

.cal-cell {
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 3px;
  font-size: 0.85rem;
  border: 1px solid transparent;
  background: var(--color-bg-soft);
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
}

.cal-cell.empty {
  background: transparent;
  cursor: default;
}

.cal-cell.disabled {
  background: transparent;
  color: var(--color-closed);
  cursor: default;
}

.cal-cell.reserved,
.cal-cell.closed {
  background: transparent;
  color: var(--color-closed);
  cursor: default;
  text-decoration: line-through;
  text-decoration-color: var(--color-closed);
}

.cal-cell.available:hover {
  border-color: var(--color-accent);
}

.cal-cell.selected {
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
}

.cal-legend {
  display: flex;
  gap: 1.2rem;
  margin-top: 1rem;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.cal-legend span::before {
  content: "";
  display: inline-block;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  margin-right: 0.35rem;
  vertical-align: middle;
}

.cal-legend .leg-available::before { background: var(--color-bg-soft); border: 1px solid var(--color-text-muted); }
.cal-legend .leg-selected::before { background: var(--color-accent); }
.cal-legend .leg-unavailable::before { background: var(--color-closed); }

/* --- 泊数選択 --- */

.nights-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.nights-row label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

select {
  background: var(--color-bg-soft);
  color: var(--color-text);
  border: 1px solid var(--color-line);
  border-radius: 3px;
  padding: 0.5rem 0.7rem;
  font-size: 0.95rem;
  font-family: inherit;
}

/* --- 料金表示 --- */

.quote-box {
  margin-top: 1.2rem;
  padding: 1rem;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: var(--color-bg-soft);
  min-height: 1.5rem;
}

.quote-box .quote-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
}

.quote-box .quote-total {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-accent);
  text-align: right;
  margin-top: 0.5rem;
}

.quote-box .quote-hint {
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

.message.error {
  color: var(--color-accent);
  font-size: 0.85rem;
}

/* --- フォーム --- */

.field {
  margin-bottom: 1.1rem;
}

.field label {
  display: block;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
  letter-spacing: 0.03em;
}

.field-note {
  margin: 0.4rem 0 0;
  font-size: 0.76rem;
  color: var(--color-text-muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-line);
  color: var(--color-text);
  border-radius: 3px;
  padding: 0.6rem 0.7rem;
  font-size: 0.95rem;
  font-family: inherit;
}

.field input:focus,
.field textarea:focus,
.field select:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.field textarea {
  min-height: 5rem;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  padding: 0.9rem;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 3px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.2s ease;
}

.submit-btn:hover:not(:disabled) {
  opacity: 0.85;
}

.submit-btn:disabled {
  background: var(--color-closed);
  color: #fff;
  opacity: 0.7;
  cursor: not-allowed;
}

.result-box {
  text-align: center;
  padding: 2rem 1rem;
}

.result-box h2 {
  border: none;
  color: var(--color-accent);
}

.result-box .detail-line {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  border-bottom: 1px dashed var(--color-line);
  padding: 0.5rem 0;
  text-align: left;
}

.result-box .detail-total {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--color-accent);
  border-bottom-style: solid;
}

.hidden {
  display: none !important;
}

@media (max-width: 480px) {
  .wrap {
    padding: 1.5rem 0.8rem 4rem;
  }

  header.page-header h1 {
    font-size: 1.4rem;
  }

  section {
    padding: 1.1rem;
  }

  .cal-cell {
    font-size: 0.75rem;
  }

  .nights-row {
    flex-direction: column;
    align-items: flex-start;
  }
}