:root {
  --bg: #f6f5f1;
  --card: #ffffff;
  --text: #1c1b19;
  --muted: #6b6860;
  --line: #e6e3dc;
  --accent: #1f7a5c;
  --accent-text: #ffffff;
  --accent-soft: #e3f1ea;
  --danger: #b4372f;
  --pending: #a86b00;
  --shadow: 0 1px 2px rgba(28, 27, 25, .06), 0 4px 16px rgba(28, 27, 25, .05);
  --radius: 18px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121412;
    --card: #1c1f1d;
    --text: #ecede9;
    --muted: #9a9d96;
    --line: #2c302d;
    --accent: #4cc38a;
    --accent-text: #0d1a13;
    --accent-soft: #1d3329;
    --danger: #ff8a7f;
    --pending: #f0b44c;
    --shadow: none;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #121412;
  --card: #1c1f1d;
  --text: #ecede9;
  --muted: #9a9d96;
  --line: #2c302d;
  --accent: #4cc38a;
  --accent-text: #0d1a13;
  --accent-soft: #1d3329;
  --danger: #ff8a7f;
  --pending: #f0b44c;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
}

button, input, select, textarea { font: inherit; color: inherit; }

[hidden] { display: none !important; }

.screen {
  max-width: 520px;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top) + 12px) 16px calc(env(safe-area-inset-bottom) + 32px);
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 14px;
}

.muted { color: var(--muted); }

/* ---- ヘッダー ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.month-nav { display: flex; align-items: center; gap: 2px; min-width: 0; }

.month-nav select {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  background: transparent;
  font-size: 20px;
  font-weight: 700;
  padding: 4px 6px;
  min-width: 0;
  text-align: center;
}

.topbar-actions { display: flex; gap: 2px; }

.icon-btn {
  border: 0;
  background: transparent;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  font-size: 22px;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
}
.icon-btn:active { background: var(--line); }
.icon-btn:disabled { opacity: .3; }
.icon-btn.spinning { animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- 精算サマリー ---- */
.summary { text-align: center; padding: 22px 18px 16px; }
.summary-label { margin: 0; font-size: 15px; color: var(--muted); font-weight: 600; }
.summary-amount {
  margin: 2px 0 2px;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.summary-total { margin: 0 0 14px; font-size: 14px; color: var(--muted); }

.people {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  text-align: left;
}
.person {
  background: var(--bg);
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.person strong { display: block; color: var(--text); font-size: 15px; margin-bottom: 2px; }

/* ---- 入力 ---- */
.amount-field {
  display: flex;
  align-items: baseline;
  gap: 6px;
  border-bottom: 2px solid var(--line);
  padding: 0 4px 6px;
  margin-bottom: 18px;
}
.amount-field:focus-within { border-color: var(--accent); }
.amount-field .yen { font-size: 28px; font-weight: 700; color: var(--muted); }
.amount-field input[type="text"] {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 40px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  padding: 0;
}

.field { margin-bottom: 16px; }
.field.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.field-label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.field.row .field-label { margin: 0; }

input[type="text"], input[type="password"], input[type="date"], textarea {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  padding: 10px 12px;
  outline: 0;
}
input[type="date"] { width: auto; min-height: 44px; }
input[type="text"]:focus, input[type="password"]:focus, input[type="date"]:focus, textarea:focus { border-color: var(--accent); }

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  background: var(--bg);
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
}
.segmented button {
  border: 0;
  background: transparent;
  border-radius: 9px;
  padding: 9px 0;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
.segmented button[aria-checked="true"] {
  background: var(--card);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chips button {
  border: 1.5px solid var(--line);
  background: var(--card);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 14px;
  cursor: pointer;
}
.chips button[aria-checked="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}
.chips.small { margin-top: 8px; gap: 6px; }
.chips.small button { padding: 4px 11px; font-size: 13px; color: var(--muted); }

.primary {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 14px;
  background: var(--accent);
  color: var(--accent-text);
  padding: 12px;
  font-weight: 700;
  cursor: pointer;
}
.primary.big { padding: 15px; font-size: 17px; margin-top: 4px; }
.primary:active { filter: brightness(.92); }
.primary:disabled { opacity: .45; }

.danger {
  width: 100%;
  border: 1.5px solid var(--danger);
  color: var(--danger);
  background: transparent;
  border-radius: 14px;
  padding: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}

/* ---- 一覧 ---- */
.list-card { padding: 14px 6px 6px; }
.list-head { display: flex; align-items: baseline; justify-content: space-between; padding: 0 12px 6px; }
.list-head h2 { margin: 0; font-size: 16px; }
.list-head span { font-size: 13px; }

.entries { list-style: none; margin: 0; padding: 0; }
.entry-row {
  display: flex;
  align-items: center;
  gap: 2px;
  border-top: 1px solid var(--line);
  padding-right: 6px;
}
.entry-row:first-child { border-top: 0; }
.entry-row.editing { background: var(--accent-soft); border-radius: 12px; }
.entry-tap {
  flex: 1;
  min-width: 0;
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center;
  gap: 6px;
  border: 0;
  background: transparent;
  text-align: left;
  padding: 10px 4px 10px 12px;
  cursor: pointer;
  border-radius: 12px;
}
.entry-tap:active:not(:disabled) { background: var(--bg); }
.entry-day { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.entry-main { min-width: 0; display: block; }
.entry-comment { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entry-meta { font-size: 12px; color: var(--muted); display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  display: inline-block;
  border-radius: 6px;
  padding: 0 6px;
  background: var(--bg);
  font-size: 12px;
}
.badge.me { background: var(--accent-soft); color: var(--accent); }
.badge.pending { background: transparent; color: var(--pending); padding: 0; }
.entry-amount { font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.entry-row.pending { opacity: .6; }
.delete-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  font-size: 18px;
  cursor: pointer;
}
.delete-btn:active { background: var(--line); }
.empty { text-align: center; padding: 18px 0 22px; margin: 0; }

.footnote { text-align: center; font-size: 12px; margin: 8px 0 0; }

/* ---- セットアップ ---- */
.setup-card { text-align: center; padding-top: 10vh; }
.setup-icon { width: 88px; height: 88px; border-radius: 22px; }
.setup-card h1 { margin: 12px 0 8px; font-size: 26px; }
.setup-card p { color: var(--muted); }
.setup-card textarea { margin-bottom: 12px; resize: none; font-size: 14px; }
.member-choice { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 8px 0; }
.member-choice button {
  border: 1.5px solid var(--line);
  background: var(--card);
  border-radius: 14px;
  padding: 16px 0;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
}
.member-choice button[aria-checked="true"] { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.error { color: var(--danger); min-height: 1.5em; }

/* ---- 設定ダイアログ ---- */
dialog {
  border: 0;
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  width: min(420px, calc(100vw - 32px));
  padding: 20px;
}
dialog::backdrop { background: rgba(0, 0, 0, .4); }
dialog h2 { margin: 0 0 8px; font-size: 18px; }
dialog hr { border: 0; border-top: 1px solid var(--line); margin: 16px 0; }
.small-text { font-size: 12px; }

/* ---- トースト ---- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 20px);
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  max-width: calc(100vw - 32px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, .2);
  z-index: 10;
}
.toast.error { background: var(--danger); color: #fff; }

/* ---- 起動中・ログイン ---- */
.boot { display: flex; justify-content: center; padding-top: 30vh; }
#login-fields { display: grid; gap: 10px; margin-top: 8px; text-align: left; }
#login-fields .small-text { margin: 0; text-align: center; }

/* ---- 精算済み ---- */
.settle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  min-height: 36px;
}
.settle-status { margin: 0; font-size: 13px; text-align: left; color: var(--muted); }
.settle-status.done { color: var(--accent); font-weight: 600; }
.settle-status.changed { color: var(--pending); }
.ghost {
  border: 1.5px solid var(--line);
  background: transparent;
  border-radius: 12px;
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  margin-left: auto;
}
.ghost:active { background: var(--line); }
a.ghost.block {
  display: block;
  text-align: center;
  text-decoration: none;
  color: var(--text);
  margin: 0 0 10px;
  padding: 11px;
}

/* ---- 編集中 ---- */
.edit-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 14px;
  border-radius: 10px;
  padding: 6px 12px;
  margin-bottom: 14px;
}
.link-btn { border: 0; background: transparent; color: inherit; font-weight: 600; text-decoration: underline; cursor: pointer; }

/* ---- 設定 ---- */
dialog h3 { font-size: 14px; margin: 0; color: var(--muted); }
.stack { display: grid; gap: 8px; }
.stack .ghost { margin-left: 0; }
dialog .primary { margin-top: 4px; }
.stack p:empty { display: none; }

.badge.burden { background: transparent; border: 1px solid var(--line); padding: 0 5px; }
.file-btn { cursor: pointer; }

/* ---- カード明細の仕分け ---- */
.block-btn { display: block; width: 100%; margin: 0 0 10px; padding: 12px; }
.screen-title { font-size: 17px; margin: 0; flex: 1; text-align: center; }
.cards-screen { padding-bottom: calc(env(safe-area-inset-bottom) + 190px); }
.drop {
  display: grid;
  gap: 4px;
  text-align: center;
  border: 2px dashed var(--line);
  border-radius: 14px;
  padding: 18px 12px;
  cursor: pointer;
}
.drop:active { background: var(--bg); }
.cards-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin: 4px 4px 8px; }
.check-all { display: flex; align-items: center; gap: 6px; font-size: 14px; white-space: nowrap; }
.cards-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.card-row {
  background: var(--card);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 10px 12px;
  display: grid;
  gap: 8px;
  border: 2px solid transparent;
}
.card-row.selected { border-color: var(--accent); }
.card-row.exclude .card-head, .card-row.dup .card-head { opacity: .55; }
.card-row.exclude .card-amount, .card-row.dup .card-amount { text-decoration: line-through; }
.card-head { display: grid; grid-template-columns: auto 40px 1fr auto; align-items: center; gap: 8px; }
.card-check input { width: 20px; height: 20px; accent-color: var(--accent); }
.card-date { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.card-place { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.card-amount { font-weight: 700; font-variant-numeric: tabular-nums; }
.segmented.small button { padding: 5px 0; font-size: 13px; }
.card-note { margin: 0; font-size: 12px; color: var(--muted); }
.card-detail { display: grid; gap: 8px; }
.card-inputs { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 8px; }
.card-inputs select, .card-inputs input {
  width: 100%;
  min-width: 0;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  padding: 8px;
  font-size: 14px;
}
.cards-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--card);
  border-top: 1px solid var(--line);
  padding: 10px 16px calc(env(safe-area-inset-bottom) + 12px);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, .06);
  z-index: 5;
}
.cards-footer > * { max-width: 488px; margin-left: auto; margin-right: auto; }
.cards-bulk { display: grid; gap: 6px; margin-bottom: 8px; font-size: 13px; font-weight: 600; }
.cards-summary { font-size: 12px; color: var(--muted); margin: 0 auto 8px; text-align: center; }
.chips.small button[aria-checked="true"] { color: var(--accent-text); }
#cards-error:empty { display: none; }