:root {
  --bg: #0c0d10;
  --surface: #16171c;
  --surface-2: #202128;
  --line: #2b2c35;
  --text: #f4f4f6;
  --muted: #9c9da9;
  --accent: #ff6a2b;
  --accent-press: #e65a1e;
  --accent-soft: rgba(255, 106, 43, 0.14);
  --good: #3ad07f;
  --warn: #ffb547;
  --danger: #ff6b6b;
  --cause: #8fdcc4;
  --cause-soft: rgba(143, 220, 196, 0.09);
  --radius: 20px;
  --tabbar: 64px;
  color-scheme: dark;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body { margin: 0; background: var(--bg); color: var(--text); }

body {
  font: 16px/1.45 ui-rounded, -apple-system, BlinkMacSystemFont, system-ui, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
  min-height: 100dvh;
}

body.busy { cursor: progress; }
body.busy .primary { opacity: 0.7; }

h1, h2, p { margin: 0; }
h2 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
b, strong { font-weight: 700; }
a { color: inherit; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
button:disabled { opacity: 0.35; cursor: default; }
button:focus-visible, input:focus-visible, select:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

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

/* ---------- logo ---------- */

.logo {
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.5px;
  font-variant-numeric: tabular-nums;
}
.logo.sm { width: 28px; height: 28px; border-radius: 8px; font-size: 11px; margin-right: 8px; }
.logo.lg { width: 84px; height: 84px; border-radius: 24px; font-size: 30px; }

.loading { min-height: 100dvh; display: grid; place-content: center; gap: 16px; text-align: center; padding: 24px; }
.loading .logo { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { transform: scale(0.92); opacity: 0.7; } }

/* ---------- auth ---------- */

.auth {
  max-width: 440px;
  margin: 0 auto;
  padding: max(40px, calc(env(safe-area-inset-top) + 24px)) 16px calc(32px + env(safe-area-inset-bottom));
  display: grid;
  gap: 18px;
}
.brand { text-align: center; display: grid; justify-items: center; gap: 10px; margin-bottom: 6px; }
.brand h1 { font-size: 34px; font-weight: 900; letter-spacing: -0.5px; }
.brand p { color: var(--muted); max-width: 320px; }

.note {
  background: var(--cause-soft);
  border: 1px solid rgba(143, 220, 196, 0.25);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 14px;
}

.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); font-weight: 600; }
.form input {
  font: inherit;
  font-size: 17px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 14px;
  width: 100%;
}
.form input[name='pin'] { letter-spacing: 6px; font-variant-numeric: tabular-nums; }
.form input:focus { border-color: var(--accent); outline: none; }
.fine { font-size: 13px; color: var(--muted); }

/* ---------- shell ---------- */

.top {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(env(safe-area-inset-top) + 10px) 16px 10px;
  background: rgba(12, 13, 16, 0.86);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.brand-sm { display: flex; align-items: center; font-weight: 800; font-size: 17px; }
.pill { font-size: 13px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 5px 10px; border-radius: 999px; }

.view {
  max-width: 520px;
  margin: 0 auto;
  padding: 12px 16px calc(var(--tabbar) + env(safe-area-inset-bottom) + 24px);
  display: grid;
  gap: 14px;
}

.tabs {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 6px 8px env(safe-area-inset-bottom);
  background: rgba(18, 19, 23, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.tabs button {
  height: var(--tabbar);
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 3px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}
.tabs svg { width: 25px; height: 25px; }
.tabs button.on { color: var(--accent); }

/* ---------- cards ---------- */

.card { background: var(--surface); border-radius: var(--radius); padding: 18px; border: 1px solid rgba(255, 255, 255, 0.04); }
.card.center { text-align: center; }
.card p + p, .card p + .row, .card p + button, .card .status + p { margin-top: 10px; }
.empty { color: var(--muted); font-size: 15px; }
.row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

.primary {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  padding: 15px 18px;
  border-radius: 14px;
  transition: transform 0.08s ease, background 0.15s;
}
.primary:active { transform: scale(0.98); background: var(--accent-press); }
.primary.big { font-size: 19px; padding: 17px; }

.ghost { background: var(--surface-2); padding: 10px 14px; border-radius: 12px; font-weight: 700; font-size: 15px; }
.ghost:active { background: var(--line); }
.link { color: var(--accent); font-weight: 700; font-size: 15px; }
.link.danger { color: var(--danger); margin-top: 12px; }

.seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: var(--surface-2); padding: 4px; border-radius: 12px; gap: 4px; }
.seg button { padding: 9px; border-radius: 9px; font-weight: 700; font-size: 15px; color: var(--muted); }
.seg button.on { background: var(--surface); color: var(--text); box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4); }
.card .seg { margin-bottom: 14px; }

/* ---------- today ---------- */

.hero { display: grid; justify-items: center; gap: 8px; padding: 8px 0 2px; }
.ring-wrap { position: relative; width: min(64vw, 230px); aspect-ratio: 1; }
.ring { width: 100%; height: 100%; transform: rotate(-90deg); overflow: visible; }
.ring circle { fill: none; stroke-width: 14; }
.ring .track { stroke: var(--surface-2); }
.ring .fill { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset 0.6s cubic-bezier(0.2, 0.8, 0.2, 1); }
.ring.full .fill { stroke: var(--good); filter: drop-shadow(0 0 10px rgba(58, 208, 127, 0.45)); }
.ring-label { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.ring-label strong { font-size: clamp(48px, 15vw, 64px); font-weight: 900; line-height: 1; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
.ring-label span { color: var(--muted); font-weight: 600; font-size: 15px; margin-top: 4px; }
.hero-sub { font-size: 17px; text-align: center; display: grid; gap: 2px; }
.hero-sub .owe { font-size: 14px; color: var(--warn); }

.logger { display: grid; gap: 14px; }
.stepper { display: grid; grid-template-columns: 56px 1fr 56px; align-items: center; gap: 10px; }
.round {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--surface-2);
  font-size: 28px;
  font-weight: 600;
  line-height: 1;
}
.round:active { background: var(--line); }
.amount { display: grid; justify-items: center; }
.amount input {
  width: 100%;
  text-align: center;
  font: inherit;
  font-size: 44px;
  font-weight: 900;
  color: var(--text);
  background: none;
  border: 0;
  padding: 0;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
}
.amount input::-webkit-outer-spin-button, .amount input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.amount input:focus { outline: none; }
.amount small { color: var(--muted); font-size: 13px; font-weight: 600; margin-top: -2px; }
.chips { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; }
.chips button { padding: 9px 0; border-radius: 10px; background: var(--surface-2); font-weight: 700; font-size: 15px; font-variant-numeric: tabular-nums; }
.chips button.on { background: var(--accent-soft); color: var(--accent); box-shadow: inset 0 0 0 1.5px var(--accent); }
.day-pick { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 14px; color: var(--muted); }
.day-pick select {
  font: inherit;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  background: var(--surface-2);
  border: 0;
  border-radius: 10px;
  padding: 7px 10px;
}

.cause { background: linear-gradient(160deg, rgba(143, 220, 196, 0.1), rgba(143, 220, 196, 0.03)), var(--surface); border-color: rgba(143, 220, 196, 0.16); }
.cause-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.kicker { color: var(--cause); font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.4px; }
.pager { display: flex; gap: 4px; }
.pager button { width: 32px; height: 32px; border-radius: 50%; background: rgba(255, 255, 255, 0.06); font-size: 20px; line-height: 1; color: var(--cause); }
.cause-text { font-size: 18px; line-height: 1.4; font-weight: 600; }
.cause-source { color: var(--muted); font-size: 13px; margin-top: 6px !important; }
.cause-source::before { content: '— '; }
.cause-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-top: 14px; }
.cause .link { color: var(--cause); }
.cause.slim { display: grid; gap: 12px; justify-items: start; }
.cause.slim p { font-weight: 600; }

.sets { list-style: none; margin: 0; padding: 0; }
.sets li { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.sets li:first-child { border-top: 0; padding-top: 2px; }
.sets b { font-size: 20px; min-width: 44px; font-variant-numeric: tabular-nums; }
.sets span { color: var(--muted); flex: 1; }
.sets button { width: 36px; height: 36px; border-radius: 50%; color: var(--muted); }
.sets button:active { background: var(--surface-2); }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; text-align: center; }
.stats div { background: var(--surface-2); border-radius: 14px; padding: 10px 4px; display: grid; }
.stats b { font-size: 22px; font-variant-numeric: tabular-nums; }
.stats small { color: var(--muted); font-size: 12px; font-weight: 600; }
.status { font-weight: 700; font-size: 15px; margin-top: 12px; }
.status.good { color: var(--good); }
.status.warn { color: var(--warn); }

.cal { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; margin-top: 14px; }
.cal .wd { text-align: center; font-size: 11px; color: var(--muted); font-weight: 700; padding-bottom: 2px; }
.cell {
  aspect-ratio: 1;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(to top, var(--accent-soft) calc(var(--p) * 100%), var(--surface-2) 0);
  color: var(--muted);
}
.cell.part { color: var(--text); }
.cell.done { background: var(--good); color: #06240f; }
.cell.today { box-shadow: inset 0 0 0 2px var(--accent); }
.cell.sel { outline: 2px solid var(--text); outline-offset: 1px; }
.cell:disabled { opacity: 0.4; background: var(--surface-2); }

/* ---------- leaderboard ---------- */

.board { list-style: none; margin: 0; padding: 0; }
.board li { display: grid; grid-template-columns: 1fr auto; gap: 14px; align-items: center; padding: 12px 10px; border-top: 1px solid var(--line); }
.board li:first-child { border-top: 0; }
.board li.me { background: var(--accent-soft); border-radius: 14px; border-color: transparent; }
.board li.me + li { border-color: transparent; }
.who { min-width: 0; display: grid; gap: 5px; }
.name { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.bar { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.bar i.full { background: var(--good); }
.meta { font-size: 13px; color: var(--muted); }
.score { font-size: 22px; font-weight: 900; font-variant-numeric: tabular-nums; padding-right: 4px; }

/* ---------- you ---------- */

.steps { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.steps + .fine { margin-top: 10px; }
.helplines { list-style: none; margin: 14px 0 12px; padding: 0; display: grid; gap: 8px; }
.helplines a { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; text-decoration: none; background: var(--surface-2); padding: 12px 14px; border-radius: 14px; }
.helplines a:active { background: var(--line); }
.helplines .where { font-size: 12px; color: var(--cause); font-weight: 700; text-align: right; }
.helplines span:last-child { grid-column: 1 / -1; color: var(--muted); font-size: 14px; }

.invite-link {
  margin-top: 12px !important;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface-2);
  font-family: ui-monospace, Menlo, monospace;
  font-size: 15px;
  color: var(--accent);
  user-select: all;
  -webkit-user-select: all;
  overflow-wrap: anywhere;
}
.row .grow { flex: 1; width: auto; }
.card .invite-link + .row { margin-top: 12px; }

.toggles { margin: 8px 0 14px; }
.toggle { display: flex; align-items: center; justify-content: space-between; gap: 14px; width: 100%; text-align: left; padding: 12px 0; border-top: 1px solid var(--line); }
.toggle:first-child { border-top: 0; }
.toggle b { display: block; font-size: 16px; }
.toggle small { display: block; color: var(--muted); font-size: 13px; margin-top: 2px; }
.switch { flex: none; position: relative; width: 50px; height: 30px; border-radius: 15px; background: var(--line); transition: background 0.2s; }
.switch::after { content: ''; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 50%; background: #fff; transition: transform 0.2s; }
.toggle[aria-checked='true'] .switch { background: var(--good); }
.toggle[aria-checked='true'] .switch::after { transform: translateX(20px); }

/* ---------- toast ---------- */

#toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tabbar) + env(safe-area-inset-bottom) + 18px);
  transform: translate(-50%, 20px);
  width: max-content;
  max-width: calc(100% - 32px);
  display: flex;
  align-items: center;
  gap: 14px;
  background: #f4f4f6;
  color: #111;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 16px;
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 10;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
#toast button { color: var(--accent-press); font-weight: 800; white-space: nowrap; }

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