:root {
  --green: #6b8f71;
  --green-light: #eef4ef;
  --green-dark: #4a6b50;
  --bg: #f6f7f4;
  --white: #ffffff;
  --text: #2c2c2c;
  --muted: #888888;
  --ok: #3daa5e;
  --warn: #e08c00;
  --ng: #d94040;
  --border: #e2e8e2;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.07);
  --r: 14px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
body {
  font-family:
    -apple-system, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  touch-action: manipulation;
}
/* デスクトップ表示: 480pxカラムにカード感を出す */
@media (min-width: 520px) {
  body {
    background: #fff;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.08);
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
  }
  html { background: #e8e8e4; }
}

/* ── ローディング ── */
#loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  gap: 14px;
}
.spinner {
  width: 38px;
  height: 38px;
  border: 3px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'M PLUS Rounded 1c', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--green-dark);
  letter-spacing: 2px;
}
.logo-img {
  height: 56px;
  width: auto;
}

/* ── 画面切り替え ── */
.view {
  display: none;
  animation: slideIn 0.2s ease;
}
.view.on {
  display: block;
}
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(14px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ── ヘッダー ── */
.hdr {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  height: 52px;
  padding: 0 16px;
  gap: 10px;
}
.hdr-back {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--green);
  font-size: 30px;
  border-radius: 50%;
  flex-shrink: 0;
}
.hdr-spacer {
  width: 48px; /* hdr-back と同幅にしてタイトルを中央に保つ */
  flex-shrink: 0;
}
.hdr-title {
  font-size: 16px;
  font-weight: 700;
  flex: 1;
  text-align: center;
}
.hdr-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'M PLUS Rounded 1c', sans-serif;
  font-size: 19px;
  font-weight: 700;
  color: var(--green-dark);
  flex: 1;
  text-align: center;
}

/* ── ヒーロー ── */
.hero {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #fff;
  padding: 22px 20px 28px;
  text-align: center;
}
.hero h1 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 4px;
}
.hero p {
  font-size: 13px;
  opacity: 0.8;
}
.free-badge {
  display: inline-block;
  background: #ff7043;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 8px;
}

/* ── カレンダー ── */
.cal-wrap {
  background: var(--white);
  margin: 14px;
  border-radius: var(--r);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
}
.cal-btn {
  width: 34px;
  height: 34px;
  border: 1.5px solid var(--border);
  background: var(--white);
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  color: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
}
@media (hover: hover) {
  .cal-btn:hover:not(:disabled) {
    background: var(--green-light);
  }
}
.cal-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  color: var(--muted);
}
.cal-month {
  font-size: 17px;
  font-weight: 800;
}
.cal-wdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--green-light);
}
.cal-wdays span {
  text-align: center;
  padding: 9px 0;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
}
.cal-wdays span:nth-child(6) {
  color: #1e7dd4;
}
.cal-wdays span:last-child {
  color: #d94040;
}
.cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}
.cell {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 0.5px solid #f0f0ee;
  cursor: pointer;
  gap: 3px;
  min-height: 50px;
  transition: background 0.12s;
  user-select: none;
}
.cell.empty {
  background: #fafaf8;
  cursor: default;
}
.cell.past {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}
.cell.closed {
  cursor: default;
}
@media (hover: hover) {
  .cell:not(.empty):not(.past):not(.closed):hover {
    background: var(--green-light);
  }
}
.cell.today .dn {
  background: var(--green-dark);
  color: #fff;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cell.sun .dn {
  color: #d94040;
}
.cell.sat .dn {
  color: #1e7dd4;
}
.dn {
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
}
.ds {
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}
.ds.ok {
  color: var(--ok);
}
.ds.wa {
  color: var(--warn);
}
.ds.ng {
  color: var(--ng);
}
.legend {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 11px 16px;
  border-top: 1px solid var(--border);
  background: #fafaf8;
}
.lg-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--muted);
}
.lg-dot {
  font-size: 13px;
  font-weight: 800;
}
.notice {
  background: #fffde7;
  border-left: 4px solid #ffc107;
  border-radius: 0 10px 10px 0;
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: #5d4037;
  margin: 0 14px 14px;
}

/* ── 時間帯一覧 ── */
.day-hdr {
  background: var(--green-light);
  padding: 14px 14px;
  border-bottom: 1px solid var(--border);
}
.day-hdr-date {
  font-size: 17px;
  font-weight: 800;
  color: var(--green-dark);
  text-align: center;
  flex: 1;
  min-width: 0;
}
.day-hdr-sub {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: 3px;
}
.slots {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.slot-card {
  background: var(--white);
  border-radius: var(--r);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s;
}
@media (hover: hover) {
  .slot-card:hover:not(.disabled) {
    border-color: var(--green);
    background: var(--green-light);
  }
}
.slot-card.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.slot-time {
  font-size: 20px;
  font-weight: 800;
}
.slot-dur {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}
.slot-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}
.badge {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
}
.badge.ok {
  background: #e6f4ea;
  color: #1e6b3a;
}
.badge.wa {
  background: #fff3e0;
  color: #cc5500;
}
.badge.ng {
  background: #ffebee;
  color: #b71c1c;
}
.slot-rem {
  font-size: 11px;
  color: var(--muted);
}

/* ── 日付ナビゲーション（day-hdr内に統合）── */
.day-hdr-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.day-nav-btn {
  padding: 10px 20px;
  border: 1.5px solid var(--border);
  background: var(--white);
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  color: var(--green-dark);
  transition: all 0.15s;
  white-space: nowrap;
  min-width: 80px;
}
@media (hover: hover) {
  .day-nav-btn:hover:not(:disabled) {
    border-color: var(--green);
    background: var(--green-light);
  }
}
.day-nav-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  color: var(--muted);
}

/* ── 予約フォーム ── */
.fw {
  padding: 14px;
}
.banner {
  background: var(--green-light);
  border-left: 4px solid var(--green);
  border-radius: 0 var(--r) var(--r) 0;
  padding: 14px;
  margin-bottom: 14px;
}
.brow {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 5px;
}
.brow:last-child {
  margin-bottom: 0;
}
.blabel {
  color: var(--muted);
  font-size: 12px;
  min-width: 60px;
}
.bval {
  font-weight: 700;
}
.card {
  background: var(--white);
  border-radius: var(--r);
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}
.card-ttl {
  font-size: 14px;
  font-weight: 800;
  color: var(--green-dark);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.fg {
  margin-bottom: 16px;
}
.fg:last-child {
  margin-bottom: 0;
}
.flabel {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 6px;
}
.req {
  color: #d94040;
  margin-left: 3px;
}
.finput {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 16px; /* 16px未満だとiOS Safariでフォーカス時にズームされる */
  font-family: inherit;
  background: #fafaf8;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}
.finput:focus {
  border-color: var(--green);
  background: #fff;
}
.finput.err {
  border-color: #d94040;
}
.errmsg {
  font-size: 12px;
  color: #d94040;
  margin-top: 4px;
  display: none;
}

/* レッスン選択 */
.lopts {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lopt {
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.lopt.sel {
  border-color: var(--green);
  background: var(--green-light);
}
.lopt.dis {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}
.lopt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.lopt-name {
  font-size: 15px;
  font-weight: 700;
}
.lopt-tag {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 20px;
  background: var(--green);
  color: #fff;
  font-weight: 700;
}
.lopt-tag.free {
  background: #ff7043;
}
.lopt-desc {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.5;
}

/* 人数選択 */
.num-grid {
  display: flex;
  gap: 8px;
}
.nbtn {
  flex: 1;
  padding: 12px 0;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: #fff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
  font-family: inherit;
}
.nbtn.sel {
  border-color: var(--green);
  background: var(--green-light);
  color: var(--green-dark);
}
.nbtn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ── 確認画面 ── */
.cfm-wrap {
  padding: 14px;
}
.cfm-card {
  background: var(--white);
  border-radius: var(--r);
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}
.cfm-ttl {
  font-size: 14px;
  font-weight: 800;
  color: var(--green-dark);
  padding-bottom: 12px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
.crow {
  display: flex;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
}
.crow:last-child {
  border-bottom: none;
}
.clabel {
  font-size: 12px;
  color: var(--muted);
  min-width: 84px;
  padding-top: 1px;
}
.cval {
  font-size: 14px;
  font-weight: 600;
  flex: 1;
  line-height: 1.5;
}

/* ── 完了画面 ── */
.suc-wrap {
  padding: 36px 20px;
  text-align: center;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.suc-icon {
  width: 80px;
  height: 80px;
  background: #e6f4ea;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  margin-bottom: 20px;
}
.suc-ttl {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--green-dark);
}
.suc-sub {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 24px;
}
.num-box {
  background: var(--green-light);
  border-radius: var(--r);
  padding: 18px 24px;
  margin-bottom: 20px;
  width: 100%;
}
.num-label {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}
.num-val {
  font-size: 34px;
  font-weight: 900;
  color: var(--green-dark);
  letter-spacing: 4px;
}
.suc-detail {
  background: #fff;
  border-radius: var(--r);
  box-shadow: var(--shadow);
  width: 100%;
  text-align: left;
  margin-bottom: 20px;
}
.srow {
  display: flex;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.srow:last-child {
  border-bottom: none;
}
.slabel {
  color: var(--muted);
  min-width: 80px;
  font-size: 12px;
  padding-top: 1px;
}
.sval {
  font-weight: 600;
  flex: 1;
}

/* ── ボタン ── */
.btnw {
  padding: 0 14px 28px;
}
.btnw.gap {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.btn-p {
  width: 100%;
  padding: 16px;
  background: var(--green);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
  letter-spacing: 0.5px;
}
@media (hover: hover) {
  .btn-p:hover:not(:disabled) {
    background: var(--green-dark);
  }
}
.btn-p:disabled {
  background: #bdbdbd;
  cursor: not-allowed;
}
.btn-s {
  width: 100%;
  padding: 14px;
  background: #fff;
  color: var(--muted);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
@media (hover: hover) {
  .btn-s:hover {
    border-color: var(--green);
    color: var(--green);
  }
}
.pad {
  height: 36px;
}

/* ── ローディングオーバーレイ ── */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.35);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: 12px;
}
.overlay.on {
  display: flex;
}
.overlay-box {
  background: var(--white);
  border-radius: 16px;
  padding: 28px 36px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}
.overlay-box .spinner {
  margin: 0 auto 10px;
}
.overlay-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}