/* Tally. Light by default, dark when the system asks. Blue = owed to you, orange = you owe. */

:root {
  --ground: #F4F5F2;
  --card: #FFFFFF;
  --ink: #17201B;
  --ink-2: #3D4842;
  --muted: #5A6560;
  --line: #E2E5E0;
  --line-soft: #EDEFEC;
  --field-line: #C9CFCA;
  --track: #E7EAE5;
  --pos: #2149B8;
  --pos-soft: #E6ECFB;
  --neg: #A84C0D;
  --neg-soft: #FFF1E6;
  --neg-ink: #7A3608;
  --info-ink: #1A3A93;
  --hero: #17201B;
  --hero-ink: #FFFFFF;
  --hero-muted: #C9D1CC;
  --hero-pos: #A9C1FF;
  --hero-neg: #FFB98A;
  --bar: #BBCBF2;
  --danger: #9A2F1A;
  --shadow: 0 6px 18px rgba(33, 73, 184, 0.28);
  --radius: 16px;
  --font: system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'DejaVu Sans Mono', monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #121614;
    --card: #1B211E;
    --ink: #E8ECE9;
    --ink-2: #C3CAC6;
    --muted: #98A29D;
    --line: #2C3430;
    --line-soft: #242B28;
    --field-line: #3E4843;
    --track: #262E2A;
    --pos: #8FAEFF;
    --pos-soft: #1D2847;
    --neg: #F2A16B;
    --neg-soft: #3A2414;
    --neg-ink: #F7C49F;
    --info-ink: #BFD0FF;
    --hero: #0B0E0C;
    --hero-ink: #F2F4F2;
    --hero-muted: #A9B3AE;
    --bar: #33457A;
    --danger: #FF9C86;
    --shadow: 0 6px 18px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--ground);
  color: var(--ink);
  font: 16px/1.4 var(--font);
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
h1, h2, h3 { margin: 0; }
h1:focus { outline: none; }
:focus-visible { outline: 2px solid var(--pos); outline-offset: 2px; }

.app { max-width: 560px; margin: 0 auto; height: 100dvh; position: relative; }
.screen { height: 100%; display: flex; flex-direction: column; position: relative; }
.scroll {
  flex: 1; overflow-y: auto; padding: 8px 20px 28px;
  display: flex; flex-direction: column; gap: 16px;
}
.pad-fab { padding-bottom: 110px; }

/* --- type & layout helpers --- */
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.strong { font-weight: 600; }
.muted { color: var(--muted); }
.muted-ink { color: var(--ink-2); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.strike { text-decoration: line-through; }
.grow { flex: 1; min-width: 0; }
.col { display: flex; flex-direction: column; gap: 2px; }
.col.end { align-items: flex-end; }
.col.center { align-items: center; }
.row { display: flex; align-items: center; }
.row.between { justify-content: space-between; }
.row.end { align-items: flex-end; }
.gap6 { gap: 6px; } .gap8 { gap: 8px; } .gap16 { gap: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.empty { color: var(--muted); text-align: center; padding: 24px 8px; margin: 0; }
.error { color: var(--danger); margin: 0; font-size: 14px; }
.headline { font-size: 26px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; }
.lede { color: var(--ink-2); margin: 0; line-height: 1.45; }
.subhead { font-size: 15px; font-weight: 700; }

/* --- top bar & nav --- */
.topbar { display: flex; align-items: center; gap: 4px; padding: max(16px, env(safe-area-inset-top)) 12px 8px; }
.topbar-title { flex: 1; display: flex; flex-direction: column; min-width: 0; padding-left: 4px; }
.topbar-title h1 { font-size: 19px; font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.icon-btn {
  width: 44px; height: 44px; border-radius: 22px; border: 0; background: transparent;
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; cursor: pointer;
}
.icon-btn:hover { background: var(--line-soft); }
.bottom-nav {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line); background: var(--card);
  padding: 6px 8px max(10px, env(safe-area-inset-bottom));
}
.nav-item { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px; min-height: 48px; font-size: 12px; color: var(--muted); }
.nav-item.active { color: var(--ink); font-weight: 600; }

.home-head { display: flex; align-items: center; justify-content: space-between; padding-top: max(12px, env(safe-area-inset-top)); }
.brand { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.brand.big { font-size: 28px; margin: 24px 0 8px; }
.logo { width: 32px; height: 32px; border-radius: 9px; background: var(--hero); color: var(--hero-ink); display: inline-flex; align-items: center; justify-content: center; font-size: 17px; }
.avatar-btn { width: 44px; height: 44px; border-radius: 22px; border: 1px solid var(--line); background: var(--card); display: inline-flex; align-items: center; justify-content: center; font-weight: 600; font-size: 14px; }

/* --- pills & banners --- */
.pill { display: inline-flex; align-items: center; gap: 4px; padding: 4px 9px; border-radius: 999px; background: var(--line-soft); color: var(--ink-2); font-size: 12px; font-weight: 600; }
.pill-warn { background: var(--neg-soft); color: var(--neg-ink); }
.banner { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 12px; background: var(--line-soft); color: var(--ink-2); font-size: 14px; }
.banner-warn { background: var(--neg-soft); color: var(--neg-ink); font-weight: 500; }
.banner-info { background: var(--pos-soft); color: var(--info-ink); font-size: 13px; }
.banner .icon { flex-shrink: 0; }
.queued { display: inline-flex; align-items: center; gap: 3px; font-size: 11px; color: var(--muted); }

/* --- cards --- */
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.hero-card { background: var(--hero); color: var(--hero-ink); border-radius: 20px; padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.hero-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.hero-grid > div { display: flex; flex-direction: column; gap: 4px; }
.hero-label { font-size: 13px; color: var(--hero-muted); }
.hero-value { font: 500 24px var(--mono); overflow-wrap: anywhere; }
.hero-value.pos { color: var(--hero-pos); }
.hero-value.neg { color: var(--hero-neg); }

.section-head { display: flex; align-items: baseline; justify-content: space-between; }
.section-head h2 { font-size: 17px; font-weight: 700; }
.stack { display: flex; flex-direction: column; gap: 10px; }

.group-card { display: flex; align-items: center; gap: 14px; padding: 14px 16px; }
.group-card:hover { border-color: var(--field-line); }
.group-icon { width: 44px; height: 44px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.settled-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-2); font-weight: 500; }
.archived summary { color: var(--muted); font-size: 14px; padding: 8px 0; cursor: pointer; }

.tone-blue { background: var(--pos-soft); color: var(--pos); }
.tone-orange { background: var(--neg-soft); color: var(--neg); }
.tone-grey { background: var(--line-soft); color: var(--ink-2); }
.tone-teal { background: color-mix(in srgb, #0F766E 14%, var(--card)); color: color-mix(in srgb, #0F766E 80%, var(--ink)); }
.tone-purple { background: color-mix(in srgb, #6D28D9 12%, var(--card)); color: color-mix(in srgb, #6D28D9 75%, var(--ink)); }

.avatar { border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.avatar-sm { width: 28px; height: 28px; font-size: 11px; }
.avatar-md { width: 34px; height: 34px; font-size: 12px; }

.amount.zero { color: var(--ink-2); }
.amount.big { font-size: 30px; font-weight: 500; }

.month-nav { display: flex; align-items: center; justify-content: space-between; padding: 4px; border-radius: 14px; }
.balance-card { padding: 18px; display: flex; flex-direction: column; gap: 14px; border-radius: 20px; }
.balance-list { list-style: none; margin: 0; padding: 12px 0 0; border-top: 1px solid var(--line-soft); display: flex; flex-direction: column; gap: 8px; }
.balance-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; }

.list { list-style: none; margin: 0; padding: 0; overflow: hidden; }
.list > li + li { border-top: 1px solid var(--line-soft); }
.row-link { display: flex; align-items: center; gap: 12px; padding: 12px 14px; min-height: 60px; }
a.row-link:hover { background: var(--line-soft); }
.settled { background: var(--line-soft); border-color: transparent; color: var(--muted); }
.settled .mono { color: var(--muted); }
.date-chip { width: 40px; display: flex; flex-direction: column; align-items: center; font-size: 11px; color: var(--muted); line-height: 1.2; flex-shrink: 0; }
.date-chip .strong { font-size: 17px; font-weight: 700; color: var(--ink); }
.settled .date-chip .strong { color: var(--muted); }
.divider { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--field-line); }

.kpi { padding: 12px 14px; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.kpi-value { font-size: 19px; overflow-wrap: anywhere; }
.transfer { display: flex; align-items: center; gap: 8px; padding: 12px 14px; }
.notice { display: flex; align-items: center; gap: 10px; padding: 12px 14px; font-size: 14px; color: var(--ink-2); }

/* --- buttons --- */
.btn {
  min-height: 48px; padding: 0 18px; border-radius: 12px; border: 1px solid var(--field-line);
  background: var(--card); display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 15px; cursor: pointer; text-align: center;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--hero); color: var(--hero-ink); border-color: var(--hero); }
.btn-primary:hover { border-color: var(--hero); opacity: 0.92; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-2); font-weight: 500; }
.btn-dashed { background: transparent; border: 1.5px dashed var(--field-line); }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 35%, var(--line)); }
.btn-danger-text { color: var(--danger); }
.btn-small { min-height: 36px; padding: 0 12px; font-size: 13px; border-radius: 10px; }
.fab {
  position: absolute; right: 20px; bottom: max(24px, env(safe-area-inset-bottom)); height: 56px; padding: 0 22px;
  border-radius: 28px; background: var(--pos); color: #FFFFFF; display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; box-shadow: var(--shadow);
}
@media (prefers-color-scheme: dark) { .fab { color: #0B1430; } }
.action-bar { padding: 12px 20px max(16px, env(safe-area-inset-bottom)); border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 6px; background: var(--ground); }

/* --- forms --- */
.form-shell { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > label, .label { font-size: 13px; font-weight: 600; }
fieldset.plain { border: 0; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
fieldset.plain legend { padding: 0; margin-bottom: 8px; }
input:where(:not([type=checkbox]):not([type=radio])), select {
  min-height: 48px; border: 1px solid var(--field-line); border-radius: 12px; padding: 0 14px;
  background: var(--card); width: 100%; min-width: 0;
}
input:where(:disabled), select:disabled { background: var(--line-soft); color: var(--ink-2); }
input[type=checkbox], input[type=radio] { width: 20px; height: 20px; margin: 0; accent-color: var(--pos); flex-shrink: 0; }
.amount-field { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 0 0; }
.amount-row { display: flex; align-items: baseline; gap: 8px; justify-content: center; }
.amount-row .currency { font-size: 20px; }
input.amount-input { border: 0; background: transparent; font-size: 42px; font-weight: 500; text-align: center; width: 220px; padding: 0; min-height: 56px; }
input.amount-input:focus { outline: none; border-bottom: 2px solid var(--pos); border-radius: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { min-height: 38px; padding: 0 14px; border-radius: 19px; border: 1px solid var(--field-line); background: var(--card); font-size: 14px; font-weight: 500; cursor: pointer; }
.chip.on { background: var(--hero); color: var(--hero-ink); border-color: var(--hero); }
.segmented { display: grid; grid-auto-columns: minmax(0, 1fr); grid-auto-flow: column; gap: 4px; background: var(--track); border-radius: 12px; padding: 4px; }
.segmented button { min-height: 40px; border: 0; border-radius: 9px; background: transparent; font-size: 14px; font-weight: 500; cursor: pointer; }
.segmented button.on { background: var(--card); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.14); }
.split-row { display: flex; align-items: center; gap: 10px; padding: 6px 14px; min-height: 56px; }
.split-row + .split-row { border-top: 1px solid var(--line-soft); }
.split-person { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; cursor: pointer; }
.share { min-width: 76px; text-align: right; }
input.mini-input { width: 64px; min-height: 40px; padding: 0 8px; text-align: center; }
input.mini-input.wide { width: 88px; }
.split-hint { padding: 0 4px; }
.mode-card { display: flex; gap: 12px; align-items: flex-start; padding: 14px; cursor: pointer; }
.mode-card input { margin-top: 2px; }
.mode-card.on { border: 2px solid var(--pos); padding: 13px; }
.member-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; flex-wrap: wrap; }
.member-row.inactive { opacity: 0.7; }
.member-actions { display: flex; gap: 6px; flex-wrap: wrap; width: 100%; padding-left: 46px; }
.link-box { padding: 14px; display: flex; flex-direction: column; gap: 10px; }
.qr-box { padding: 16px; display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
.qr-box img { background: #FFFFFF; border-radius: 12px; padding: 6px; }
.qr-box .link-box { border: 0; padding: 0; width: 100%; text-align: left; }
.codes { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.code-list { margin: 0; padding-left: 26px; columns: 2; font-size: 15px; line-height: 1.8; }
.steps { margin: 0; padding: 14px 16px 14px 34px; display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: var(--ink-2); }
.auth { gap: 18px; }

/* --- settle done --- */
.done { align-items: center; justify-content: center; text-align: center; gap: 14px; }
.done-icon { width: 72px; height: 72px; border-radius: 36px; background: var(--pos-soft); color: var(--pos); display: inline-flex; align-items: center; justify-content: center; }
.done .btn { min-width: 200px; }

/* --- charts --- */
.chart { margin: 0; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.chart-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.chart-title { font-size: 15px; font-weight: 700; }
.chart-readout { font-size: 13px; color: var(--ink-2); }
.bar-chart { width: 100%; height: auto; overflow: visible; }
.bar-chart .grid { stroke: var(--line); stroke-dasharray: 3 3; }
.bar-chart .axis { stroke: var(--field-line); }
.bar-chart .bar { fill: var(--bar); transition: fill 120ms; }
.bar-chart .bar.active { fill: var(--pos); }
.bar-chart .hit { fill: transparent; cursor: default; }
.bar-chart .hit:focus-visible { outline: none; stroke: var(--pos); stroke-width: 1.5; }
.bar-chart .tick { fill: var(--muted); font-size: 11px; text-anchor: middle; font-family: var(--font); }
.hbar { display: flex; flex-direction: column; gap: 5px; }
.hbar-head { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; }
.hbar-track { position: relative; height: 10px; border-radius: 5px; background: var(--line-soft); }
.hbar-fill { height: 100%; border-radius: 5px; background: var(--pos); }
.hbar-marker { position: absolute; top: -4px; bottom: -4px; width: 2px; background: var(--ink); }
.marker-key { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.marker-swatch { width: 2px; height: 12px; background: var(--ink); }

.toast {
  position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); max-width: min(92vw, 480px);
  background: var(--hero); color: var(--hero-ink); padding: 12px 16px; border-radius: 12px; font-size: 14px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25); z-index: 10;
}
.toast.warn { background: var(--neg-soft); color: var(--neg-ink); border: 1px solid var(--neg); }

@media (min-width: 600px) {
  .app { border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}