:root {
  --pink-main: #f14b94;
  --pink-dark: #ed1e79;
  --pink-soft: #ffe5f0;
  --pink-mid: #ffb8d6;
  --accent-yellow: #ffe34d;
  --text-dark: #1a1a2e;
  --bg-light: #fff7fb;
  --gray-100: #f5f5f7;
  --gray-200: #e5e5e7;
  --gray-500: #888;
  --gray-700: #444;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Noto Sans JP', 'Hiragino Sans', sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

a { color: var(--pink-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ヘッダー */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 16px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-header .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.1em;
  color: var(--text-dark);
}
.site-header .brand img { width: 36px; height: 36px; }
.site-header .back-link {
  font-size: 14px;
  color: var(--gray-500);
}

/* ヒーロー */
.hero {
  background: linear-gradient(135deg, var(--pink-soft) 0%, #fff 100%);
  padding: 60px 20px;
  text-align: center;
}
.hero h1 {
  font-size: 36px;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.hero .lead {
  font-size: 16px;
  color: var(--gray-700);
  max-width: 600px;
  margin: 0 auto;
}
.hero .pink-bg {
  background: var(--pink-dark);
  color: #fff;
  padding: 2px 14px;
  border-radius: 4px;
}

/* セクション */
.section {
  padding: 48px 0;
}
.section h2 {
  font-size: 24px;
  font-weight: 900;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.section .sub {
  color: var(--gray-500);
  font-size: 14px;
  margin-bottom: 24px;
}

/* タイムテーブル */
.timetable {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.lesson-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 20px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
}
.lesson-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -10px rgba(237, 30, 121, 0.25);
  border-color: var(--pink-mid);
}
.lesson-card .day {
  display: inline-block;
  background: var(--pink-dark);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.lesson-card .time {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}
.lesson-card .title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.lesson-card .studio {
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: 12px;
}
.lesson-card .meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--gray-500);
  padding-top: 12px;
  border-top: 1px solid var(--gray-200);
}
.lesson-card .capacity {
  color: var(--pink-dark);
  font-weight: 700;
}

/* 店舗フィルタ */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.filter-btn {
  background: #fff;
  border: 1px solid var(--gray-200);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter-btn:hover {
  border-color: var(--pink-mid);
}
.filter-btn.active {
  background: var(--pink-dark);
  color: #fff;
  border-color: var(--pink-dark);
}

/* 日付セレクタ（タイムテーブル詳細画面） */
.date-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 16px 0;
  -webkit-overflow-scrolling: touch;
}
.date-tab {
  flex: 0 0 auto;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 12px 16px;
  cursor: pointer;
  text-align: center;
  min-width: 80px;
  transition: all 0.15s ease;
}
.date-tab.active {
  background: var(--pink-dark);
  color: #fff;
  border-color: var(--pink-dark);
}
.date-tab.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.date-tab .weekday {
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 4px;
}
.date-tab .day-num {
  font-size: 20px;
  font-weight: 900;
}

/* スロット表示 */
.slot-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}
.slot-row {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.slot-row.full {
  opacity: 0.5;
}
.slot-row .time-block {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.slot-row .info-block {
  flex: 1;
  font-size: 14px;
  color: var(--gray-700);
}
.slot-row .info-block .lesson-title {
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 2px;
}
.slot-row .count {
  font-size: 13px;
  color: var(--gray-500);
}
.slot-row .count.few {
  color: var(--pink-dark);
  font-weight: 700;
}
.slot-row .book-btn {
  background: var(--pink-dark);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  cursor: pointer;
  transition: opacity 0.15s ease;
  white-space: nowrap;
}
.slot-row .book-btn:hover {
  opacity: 0.85;
}
.slot-row .book-btn:disabled {
  background: var(--gray-200);
  color: var(--gray-500);
  cursor: not-allowed;
}

/* フォーム */
.form {
  background: #fff;
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 10px 30px -15px rgba(0,0,0,0.1);
}
.form .summary {
  background: var(--pink-soft);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 28px;
}
.form .summary .row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 14px;
}
.form .summary .row .label {
  color: var(--gray-700);
}
.form .summary .row .value {
  font-weight: 700;
}

.field {
  margin-bottom: 20px;
}
.field label {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.field label .req {
  color: var(--pink-dark);
  margin-left: 4px;
}
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.15s ease;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--pink-dark);
}
.field .checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.submit-btn {
  background: var(--text-dark);
  color: #fff;
  border: none;
  padding: 16px 40px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 800;
  cursor: pointer;
  width: 100%;
  transition: opacity 0.15s ease;
}
.submit-btn:hover {
  opacity: 0.85;
}
.submit-btn:disabled {
  background: var(--gray-200);
  color: var(--gray-500);
  cursor: not-allowed;
}

/* 完了 / キャンセル */
.result-box {
  background: #fff;
  border-radius: 16px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 10px 30px -15px rgba(0,0,0,0.1);
}
.result-box .icon {
  font-size: 56px;
  margin-bottom: 16px;
}
.result-box h2 {
  font-size: 24px;
  margin-bottom: 16px;
}
.result-box .detail {
  color: var(--gray-700);
  margin-bottom: 24px;
}
.result-box .info-table {
  background: var(--pink-soft);
  border-radius: 12px;
  padding: 20px;
  text-align: left;
  margin: 0 auto 24px;
  max-width: 480px;
}
.result-box .info-table .row {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  font-size: 14px;
}
.result-box .info-table .label {
  color: var(--gray-700);
}
.result-box .info-table .value {
  font-weight: 700;
}

/* フッター */
.site-footer {
  background: var(--text-dark);
  color: #fff;
  padding: 32px 20px;
  text-align: center;
  font-size: 13px;
  margin-top: 80px;
}
.site-footer .stores {
  color: var(--pink-mid);
  margin: 8px 0;
}

/* レッスン（トレーナー）フィルタタブ */
.lesson-filter {
  display: grid;
  grid-template-columns: 100px 1fr 1fr;
  gap: 12px;
  margin: 16px 0 24px;
}
.lf-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}
.lf-price {
  font-size: 16px;
  font-weight: 900;
  color: var(--pink-dark);
  white-space: nowrap;
}
.lesson-filter-btn {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.lesson-filter-btn:hover {
  border-color: var(--pink-mid);
}
.lesson-filter-btn.active {
  border-color: var(--pink-dark);
  border-width: 2px;
  background: var(--pink-soft);
  padding: 15px;
}
.lesson-filter-btn.all-btn {
  align-items: center;
  text-align: center;
  font-size: 14px;
  font-weight: 800;
  color: var(--gray-700);
  min-width: 100px;
  padding-left: 20px;
  padding-right: 20px;
}
.lesson-filter-btn.all-btn.active {
  color: var(--pink-dark);
}
.lesson-filter-btn .lf-title {
  font-size: 15px;
  font-weight: 900;
  white-space: nowrap;
}
.lesson-filter-btn .lf-meta {
  font-size: 12px;
  color: var(--gray-700);
}
.lesson-filter-btn .lf-desc {
  font-size: 11px;
  color: var(--gray-500);
  margin-top: 4px;
  line-height: 1.5;
}

/* フィルタアウト状態 */
.cal-cell.filtered {
  opacity: 0.22;
  pointer-events: none;
}

/* カレンダー */
.calendar-wrap {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 24px;
}
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.calendar-header h3 {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.01em;
}
.calendar-header .nav-btn {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  width: 36px;
  height: 36px;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.calendar-header .nav-btn:hover {
  background: var(--pink-soft);
}
.calendar-header .nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.cal-weekday {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-500);
  padding: 8px 0 4px;
}
.cal-weekday.sun { color: #c33; }
.cal-weekday.sat { color: #36b; }

.cal-cell {
  aspect-ratio: 1 / 1.15;
  border-radius: 10px;
  background: var(--gray-100);
  border: 1px solid transparent;
  padding: 10px 6px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  position: relative;
  transition: all 0.15s ease;
  min-height: 92px;
}
.cal-cell.empty {
  background: transparent;
  cursor: default;
  pointer-events: none;
}
.cal-cell.past {
  opacity: 0.35;
  cursor: not-allowed;
}
.cal-cell.closed {
  background: #fafafa;
  cursor: not-allowed;
}
.cal-cell.available {
  background: #fff;
  border-color: var(--pink-mid);
}
.cal-cell.available:hover {
  background: var(--pink-soft);
  transform: translateY(-1px);
}
.cal-cell.full {
  background: #fff5f5;
  cursor: not-allowed;
}
.cal-cell.selected {
  background: var(--pink-dark) !important;
  color: #fff;
  border-color: var(--pink-dark);
}
.cal-cell.selected .cal-status,
.cal-cell.selected .cal-date {
  color: #fff !important;
}
.cal-cell.today {
  outline: 2px solid var(--text-dark);
  outline-offset: -2px;
}

.cal-date {
  font-size: 16px;
  font-weight: 800;
  line-height: 1;
  color: var(--text-dark);
}
.cal-cell.sun .cal-date { color: #c33; }
.cal-cell.sat .cal-date { color: #36b; }
.cal-cell.holiday .cal-date { color: #c33; }
.cal-status {
  font-size: 15px;
  font-weight: 900;
  margin-top: auto;
  text-align: center;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.cal-status.ok { color: var(--pink-dark); }
.cal-status.few {
  color: #e67e22;
  background: #fff3e0;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 13px;
}
.cal-status.x {
  color: #c33;
  background: #fee;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 13px;
}
.cal-status.muted { color: var(--gray-500); font-size: 12px; font-weight: 700; }

.cal-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  font-size: 12px;
  color: var(--gray-500);
}
.cal-legend .item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.cal-legend .dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  display: inline-block;
}
.cal-legend .dot.available { background: #fff; border: 1px solid var(--pink-mid); }
.cal-legend .dot.full { background: #fff5f5; }
.cal-legend .dot.closed { background: #fafafa; border: 1px solid var(--gray-200); }

.slot-panel {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  display: none;
}
.slot-panel.active { display: block; }
.slot-panel h4 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 4px;
}
.slot-panel .panel-sub {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 16px;
}
.slot-panel .slot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}
.slot-panel .slot-btn {
  padding: 14px 12px;
  border: 1px solid var(--pink-mid);
  border-radius: 10px;
  text-align: center;
  text-decoration: none;
  color: var(--text-dark);
  background: #fff;
  transition: all 0.15s ease;
}
.slot-panel .slot-btn:hover {
  background: var(--pink-soft);
  transform: translateY(-1px);
}
.slot-panel .slot-btn.disabled {
  background: var(--gray-100);
  border-color: var(--gray-200);
  opacity: 0.55;
  pointer-events: none;
}
.slot-panel .slot-time {
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.slot-panel .slot-meta {
  font-size: 11px;
  font-weight: 700;
  margin-top: 4px;
}
.slot-panel .slot-meta.ok { color: var(--pink-dark); }
.slot-panel .slot-meta.few { color: #e67e22; }
.slot-panel .slot-meta.x { color: #c33; }
.slot-panel .slot-meta.muted { color: var(--gray-500); }

/* レスポンシブ */
@media (max-width: 640px) {
  .hero h1 { font-size: 28px; }
  .timetable { grid-template-columns: 1fr; }
  .form { padding: 20px; }
  .slot-row { flex-direction: column; align-items: stretch; }
  .slot-row .book-btn { width: 100%; }
  .cal-cell { min-height: 64px; padding: 6px 2px 4px; }
  .cal-date { font-size: 13px; }
  .cal-status { font-size: 11px; }
  .cal-status.few, .cal-status.x { font-size: 10px; padding: 1px 4px; }
  .calendar-wrap { padding: 10px 6px; }
  .calendar-grid { gap: 2px; }
  .cal-weekday { padding: 6px 0 2px; font-size: 11px; }
  .container { padding: 0 12px; }
  .section { padding: 24px 0; }

  /* レッスンフィルタタブはスマホ時に縦並び */
  .lesson-filter {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }
  .lesson-filter-btn.all-btn {
    grid-column: 1 / -1;
    min-width: 0;
    padding: 12px 16px;
  }
  .lf-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    margin-bottom: 6px;
  }
  .lesson-filter-btn .lf-title { font-size: 14px; white-space: normal; line-height: 1.2; }
  .lf-price { font-size: 16px; }
  .lesson-filter-btn .lf-meta { font-size: 11px; }
  .lesson-filter-btn .lf-desc { font-size: 11px; line-height: 1.4; }
}

/* ローディング */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--gray-500);
}
.error-msg {
  background: #fee;
  color: #c33;
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}