:root {
  --bg: #F1F2F6;
  --surface: #FFFFFF;
  --surface-2: #E9EBF2;
  --ink: #1B2130;
  --ink-muted: #5B6478;
  --border: #D7DAE4;
  --accent: #2F6F5E;
  --accent-strong: #21594A;
  --accent-ink: #FFFFFF;
  --credit: #227A5B;
  --credit-bg: #E1F2EA;
  --debit: #A6402F;
  --debit-bg: #F7E7E3;
  --warn-bg: #FBEEDD;
  --warn-ink: #7A4B12;
  --focus: #2F6F5E;
  --shadow: 0 1px 2px rgba(27, 33, 48, 0.06), 0 8px 24px rgba(27, 33, 48, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #10141C;
    --surface: #1A202B;
    --surface-2: #212836;
    --ink: #E8EAF1;
    --ink-muted: #9AA3B8;
    --border: #2C3444;
    --accent: #4FB093;
    --accent-strong: #6FCBB0;
    --accent-ink: #0E1712;
    --credit: #4FC190;
    --credit-bg: #17301F;
    --debit: #E2896F;
    --debit-bg: #3A241D;
    --warn-bg: #3A2E1B;
    --warn-ink: #E8C98C;
    --focus: #6FCBB0;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

:root[data-theme="dark"] {
  --bg: #10141C;
  --surface: #1A202B;
  --surface-2: #212836;
  --ink: #E8EAF1;
  --ink-muted: #9AA3B8;
  --border: #2C3444;
  --accent: #4FB093;
  --accent-strong: #6FCBB0;
  --accent-ink: #0E1712;
  --credit: #4FC190;
  --credit-bg: #17301F;
  --debit: #E2896F;
  --debit-bg: #3A241D;
  --warn-bg: #3A2E1B;
  --warn-ink: #E8C98C;
  --focus: #6FCBB0;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Work Sans", -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.num, .stat-value, .cell-amount, .settle-amount, td.num, th.num {
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-variant-numeric: tabular-nums;
}

.install-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--accent-ink);
  font-size: 0.88rem;
  text-align: center;
}

.install-bar:empty { display: none; }

.install-bar .btn-secondary {
  background: transparent;
  border-color: color-mix(in srgb, var(--accent-ink) 40%, transparent);
  color: var(--accent-ink);
}

.install-bar .btn-secondary:hover {
  background: color-mix(in srgb, var(--accent-ink) 15%, transparent);
}

.install-bar-dismiss {
  appearance: none;
  border: none;
  background: none;
  color: var(--accent-ink);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  opacity: 0.8;
}

.install-bar-dismiss:hover { opacity: 1; }

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px 16px 64px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topbar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 2px;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 600;
}

.tripname {
  margin: 0;
  font-family: "Fraunces", "Iowan Old Style", Georgia, serif;
  font-weight: 600;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  text-wrap: balance;
  color: var(--ink);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.stat {
  background: var(--surface-2);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-value {
  font-size: 1.05rem;
  font-weight: 600;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.banner {
  margin: 0;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 0.88rem;
}

.banner-readonly {
  background: var(--surface-2);
  color: var(--ink-muted);
  border: 1px solid var(--border);
}

.banner-local {
  background: var(--warn-bg);
  color: var(--warn-ink);
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--ink-muted);
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 10px 14px;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  position: relative;
  top: 1px;
}

.tab:hover { color: var(--ink); }

.tab.active {
  color: var(--accent-strong);
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-color: var(--surface);
}

.tab:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.panel { min-height: 200px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card h2 {
  margin: 0;
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: 1.3rem;
}

.hint {
  margin: -8px 0 0;
  color: var(--ink-muted);
  font-size: 0.86rem;
}

.ledger {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.ledger th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
  font-weight: 600;
  padding: 0 10px 8px;
  border-bottom: 1px solid var(--border);
}

.ledger th.num, .ledger td.num { text-align: right; }

.ledger td {
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.ledger tr:last-child td { border-bottom: none; }

.cell-name { font-weight: 500; }
.subtle { color: var(--ink-muted); font-size: 0.8rem; margin-top: 2px; }
.cell-amount { text-align: right; white-space: nowrap; }
.cell-actions { text-align: right; white-space: nowrap; }

.link-btn {
  appearance: none;
  background: none;
  border: none;
  font: inherit;
  font-size: 0.82rem;
  color: var(--ink-muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
}

.link-btn:hover { color: var(--ink); background: var(--surface-2); }
.link-btn.danger:hover { color: var(--debit); }

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 999px;
}

.tag-income { background: var(--credit-bg); color: var(--credit); }
.tag-equal { background: var(--surface-2); color: var(--ink-muted); }

.inline-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.expense-form { grid-template-columns: repeat(2, 1fr); }

.field { display: flex; flex-direction: column; gap: 6px; }
.field-wide { grid-column: 1 / -1; }

.field label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-muted);
}

input[type="text"], input[type="number"], select {
  font: inherit;
  font-size: 0.94rem;
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
}

.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 10px 12px;
  background: var(--surface-2);
  border-radius: 8px;
}

.check { display: flex; align-items: center; gap: 6px; font-size: 0.9rem; }

.income-hidden { color: var(--ink-muted); font-style: italic; }
.income-toggle { padding: 10px 12px; background: var(--surface-2); border-radius: 8px; }

.percent-field {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 140px;
}

.percent-field input {
  flex: 1;
  min-width: 0;
}

.percent-field span {
  color: var(--ink-muted);
  font-weight: 600;
}

.segmented { display: flex; gap: 8px; }

.seg {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 0.86rem;
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  flex: 1;
}

.btn-primary {
  grid-column: 1 / -1;
  appearance: none;
  border: none;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 11px 18px;
  border-radius: 9px;
  cursor: pointer;
  justify-self: start;
}

.btn-primary:hover { background: var(--accent-strong); }

.empty {
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 28px 20px;
  text-align: center;
  color: var(--ink-muted);
}

.empty-title { margin: 0 0 4px; font-weight: 600; color: var(--ink); }
.empty-body { margin: 0; font-size: 0.9rem; }

.balances { display: flex; flex-direction: column; gap: 16px; }
.balance-row { display: flex; flex-direction: column; gap: 6px; }
.balance-head { display: flex; justify-content: space-between; align-items: baseline; }
.balance-name { font-weight: 600; }

.pill {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
}

.pill-credit { background: var(--credit-bg); color: var(--credit); }
.pill-debit { background: var(--debit-bg); color: var(--debit); }
.pill-even { background: var(--surface-2); color: var(--ink-muted); }

.balance-track {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-2);
  overflow: hidden;
}

.balance-fill { height: 100%; border-radius: 999px; }
.balance-fill-credit { background: var(--credit); }
.balance-fill-debit { background: var(--debit); }
.balance-fill-even { background: var(--border); }

.balance-detail { font-size: 0.8rem; color: var(--ink-muted); }

.settle-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.settle-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 14px;
  background: var(--surface-2);
  border-radius: 10px;
  font-size: 0.94rem;
}

.settle-from, .settle-to { font-weight: 600; }
.settle-arrow { color: var(--ink-muted); }
.settle-amount { margin-left: auto; font-weight: 600; }
.settle-history .settle-amount { margin-left: 0; }
.settle-history li .link-btn { margin-left: auto; }

.income-hidden { color: var(--ink-muted); font-style: italic; }
.income-toggle { padding: 10px 12px; background: var(--surface-2); border-radius: 8px; }

/* ---------- landing page ---------- */

.landing {
  max-width: 560px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.landing-hero { display: flex; flex-direction: column; gap: 10px; text-align: center; }

.landing-hero h1 {
  margin: 0;
  font-family: "Fraunces", Georgia, serif;
  font-weight: 600;
  font-size: clamp(2rem, 6vw, 2.7rem);
  text-wrap: balance;
}

.landing-hero p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.02rem;
}

.landing-card { align-items: stretch; }
.landing-card .btn-primary { justify-self: stretch; text-align: center; }

.landing-note {
  text-align: center;
  color: var(--ink-muted);
  font-size: 0.84rem;
}

/* ---------- trip page chrome ---------- */

.share-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.share-link {
  flex: 1;
  min-width: 160px;
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-muted);
}

.btn-secondary {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  font-size: 0.86rem;
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.btn-secondary:hover { background: var(--surface-2); }

.sync-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--credit);
  margin-right: 6px;
}

.sync-dot.stale { background: var(--warn-ink); }

@media (max-width: 560px) {
  .stat-row { grid-template-columns: 1fr 1fr; }
  .inline-form, .expense-form { grid-template-columns: 1fr; }
  .card { padding: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}