:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --text: #1d1d1b;
  --muted: #6c6b66;
  --border: #e3e1da;
  --accent: #2f6f5e;
  --accent-text: #ffffff;
  --pos: #23845f;
  --neg: #c2453b;
  --pos-bg: #d7efe4;
  --neg-bg: #f8dcd8;
  --radius: 12px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151614;
    --surface: #1f201e;
    --text: #ecebe6;
    --muted: #9b9a93;
    --border: #33342f;
    --accent: #5fb89c;
    --accent-text: #0f1a16;
    --pos: #62c79b;
    --neg: #f0857a;
    --pos-bg: #1e3a2f;
    --neg-bg: #43241f;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5rem; }
h1 { font-size: 1.75rem; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; }
h3 { font-size: 1rem; margin-top: .5rem; }
p { margin: 0 0 .5rem; }
a { color: var(--accent); }

.container { max-width: 720px; margin: 0 auto; padding: 16px 16px 64px; display: grid; gap: 16px; }
.topbar { border-bottom: 1px solid var(--border); background: var(--surface); }
.topbar-inner { max-width: 720px; margin: 0 auto; padding: 8px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.brand { display: inline-flex; align-items: center; gap: 8px; padding: 4px 0; font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap; }
.logo { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: var(--accent-text); font-size: 18px; }

/* Language switcher: inline list on wide screens, dropdown on narrow ones */
.flag { width: 20px; height: 14px; border-radius: 2px; object-fit: cover; flex: none; box-shadow: 0 0 0 1px rgb(0 0 0 / .15); }
.lang-btn {
  display: inline-flex; align-items: center; gap: 6px; font: inherit; font-size: .85rem; color: var(--muted);
  background: none; border: 1px solid transparent; border-radius: 8px; padding: 5px 8px; cursor: pointer; white-space: nowrap;
}
.lang-btn:hover { color: var(--text); background: var(--bg); }
.lang-btn[aria-pressed="true"] { color: var(--text); font-weight: 600; border-color: var(--border); background: var(--bg); }
.lang-list { display: flex; gap: 2px; }
.lang-menu { display: none; position: relative; }
.lang-menu summary {
  list-style: none; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; font-size: .85rem; font-weight: 600;
  border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; background: var(--bg);
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu .caret { color: var(--muted); font-size: .75rem; }
.lang-pop {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; min-width: 160px; display: grid; gap: 2px; padding: 6px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: 0 8px 24px rgb(0 0 0 / .18);
}
.lang-pop .lang-btn { justify-content: flex-start; font-size: .95rem; padding: 8px 10px; }
@media (max-width: 700px) {
  .lang-list { display: none; }
  .lang-menu { display: block; }
}

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.grow { flex: 1 1 auto; min-width: 0; }
.error { color: var(--neg); margin: 0; }

.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 2rem; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.card-title { display: flex; justify-content: space-between; align-items: baseline; }

.stack { display: grid; gap: 12px; }
.stack-sm { display: grid; gap: 8px; margin-bottom: 8px; }
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.currency { width: 110px; }

label { display: grid; gap: 4px; font-size: .9rem; color: var(--muted); }
fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; margin: 0; }
legend { font-size: .9rem; color: var(--muted); padding: 0 4px; }
input, select {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; width: 100%;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.btn {
  font: inherit; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 8px; padding: 10px 16px; text-decoration: none; display: inline-block; text-align: center;
}
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--neg); }
.btn.small { padding: 6px 10px; font-size: .85rem; }
.btn.block { width: 100%; padding: 14px; font-size: 1.05rem; }
.link { background: none; border: 0; padding: 0; font: inherit; color: var(--accent); cursor: pointer; }

.group-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.group-head h1 { word-break: break-word; }
.actions { display: flex; gap: 8px; }

.list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.item { display: flex; align-items: center; gap: 12px; padding: 8px 0; }
.list > li + li > .item, .list > .item + .item { border-top: 1px solid var(--border); }
.amt { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }

.date-sep { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); padding: 12px 0 2px; }
.expense { width: 100%; background: none; border: 0; text-align: left; font: inherit; color: inherit; cursor: pointer; border-radius: 8px; padding: 8px; }
.expense:hover { background: var(--bg); }
.expense .grow { display: grid; }
.expense .desc { font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.expense .muted { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon { flex: none; width: 36px; height: 36px; display: grid; place-items: center; border-radius: 50%; background: var(--bg); border: 1px solid var(--border); font-weight: 700; color: var(--accent); }
.transfer .icon { color: var(--muted); }
.transfer .amt { color: var(--muted); font-weight: 500; }

.balances { display: grid; gap: 12px; }
.bal { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) auto; gap: 12px; align-items: center; }
.bal-name { display: grid; min-width: 0; }
.bal-name > * { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bal-track { position: relative; height: 10px; }
.axis { position: absolute; left: 50%; top: -3px; bottom: -3px; width: 1px; background: var(--border); }
.bar { position: absolute; top: 0; bottom: 0; border-radius: 4px; min-width: 2px; }
.bar.pos { left: 50%; background: var(--pos); }
.bar.neg { right: 50%; background: var(--neg); }
.bal-amt { font-variant-numeric: tabular-nums; font-weight: 700; text-align: right; min-width: 6.5em; }
.pos { color: var(--pos); }
.neg { color: var(--neg); }
@media (max-width: 520px) {
  .bal { grid-template-columns: minmax(0, 1fr) auto; }
  .bal-track { grid-column: 1 / -1; order: 3; }
}

dialog {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 20px;
  background: var(--surface); color: var(--text);
  width: min(520px, calc(100vw - 32px)); max-height: calc(100vh - 32px);
}
dialog::backdrop { background: rgb(0 0 0 / .45); }
.dialog-actions { display: flex; gap: 8px; align-items: center; }

.seg { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.seg label { position: relative; flex: 1; display: block; text-align: center; padding: 8px; cursor: pointer; color: var(--text); font-size: .95rem; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label:has(input:checked) { background: var(--accent); color: var(--accent-text); font-weight: 600; }
.seg label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: -2px; }

.seg-sm { margin-bottom: 10px; }
.seg-sm label { padding: 6px; font-size: .85rem; }

.split-rows { display: grid; gap: 6px; }
.split-row { display: flex; align-items: center; gap: 10px; color: var(--text); font-size: .95rem; }
.split-row input { width: 96px; flex: none; padding: 6px 10px; text-align: right; font-variant-numeric: tabular-nums; }
.split-row .preview { width: 76px; flex: none; text-align: right; font-variant-numeric: tabular-nums; }
.check [data-preview] { font-variant-numeric: tabular-nums; white-space: nowrap; }
.split-hint { margin: 8px 0 0; color: var(--muted); }
.split-hint:empty { display: none; }
.split-hint.pos { color: var(--pos); }
.split-hint.neg { color: var(--neg); }

.split-tools { display: flex; gap: 12px; margin-bottom: 8px; font-size: .85rem; }
.split-tools[hidden] { display: none; }
.checks { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 6px; }
.check { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: .95rem; padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
.check input { width: auto; margin: 0; accent-color: var(--accent); }

#member-list .item input { padding: 6px 10px; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 999px;
  font-size: .9rem; box-shadow: 0 4px 16px rgb(0 0 0 / .2); z-index: 10;
}
.toast[hidden] { display: none; }

.btn.armed, .btn.danger.armed { background: var(--neg); border-color: var(--neg); color: #fff; }
.offscreen { position: fixed; left: -9999px; top: 0; opacity: 0; }

/* Settle up: [who] [✓] [amount] [Enter payment] */
.settle { flex-wrap: wrap; row-gap: 6px; }
.settle-check {
  flex: none; width: 26px; height: 26px; border-radius: 6px; cursor: pointer; padding: 0;
  border: 2px solid var(--pos); background: transparent; display: grid; place-items: center;
}
.settle-check::after { content: '✓'; color: var(--pos); font-weight: 800; font-size: 15px; line-height: 1; opacity: .35; }
.settle-check:hover::after, .settle-check:focus-visible::after { opacity: 1; }
.settle-check[aria-checked="true"] { background: var(--pos); }
.settle-check[aria-checked="true"]::after { color: var(--surface); opacity: 1; }
.settle-check:focus-visible { outline: 2px solid var(--pos); outline-offset: 2px; }
@media (max-width: 520px) {
  .settle-who { flex-basis: 100%; }
  .settle-pay { margin-left: auto; }
}

/* Settlement proposal */
.proposal-table { display: grid; gap: 2px; font-variant-numeric: tabular-nums; }
.pt-row { display: grid; grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr)); gap: 8px; align-items: baseline; padding: 6px 0; border-top: 1px solid var(--border); }
.pt-row > * { text-align: right; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pt-row > :first-child { text-align: left; }
.pt-head { border-top: 0; font-size: .8rem; color: var(--muted); padding-top: 0; }
.pt-row > span:last-child { font-weight: 700; }
.pt-head > span:last-child { font-weight: 400; }
@media (max-width: 520px) { .pt-row { font-size: .85rem; gap: 6px; } }
#propose-btn { margin-top: 4px; }
.pt-head > * { white-space: normal; line-height: 1.2; }

/* Password page (server.js → SITE_PASSWORD) */
.login { max-width: 380px; padding-top: 15vh; }
.bal-name > .small { white-space: normal; } /* payment details may need two lines */

/* Collapsible cards */
[data-section] .card-title { align-items: center; gap: 12px; }
[data-section] .card-title h2 { margin: 0; }
[data-section].card > .card-title + * { margin-top: 10px; }
.collapse-btn {
  flex: none; width: 30px; height: 30px; display: grid; place-items: center; padding: 0; cursor: pointer;
  background: none; border: 1px solid var(--border); border-radius: 8px; color: var(--muted);
}
.collapse-btn:hover { color: var(--text); border-color: var(--muted); }
.collapse-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: transform .15s; }
.collapsed .collapse-btn svg { transform: rotate(180deg); }
.card.collapsed > :not(.card-title) { display: none; }

/* Partner mentions */
.sponsor-line { padding-top: 6px; }
.sponsor-line a { color: var(--accent); text-decoration: none; }
.sponsor-line a:hover { text-decoration: underline; }
.app-footer { max-width: 720px; margin: 0 auto; padding: 8px 16px 32px; text-align: center; color: var(--muted); font-size: .85rem; }
.app-footer a { color: var(--muted); }
.app-footer a:hover { color: var(--text); }
.celebrate { text-align: center; max-width: 440px; }
.celebrate .celebrate-icon { font-size: 44px; line-height: 1; }
.celebrate p { color: var(--muted); margin: 0; }
.celebrate .dialog-actions { margin-top: 4px; }
.lang-btn[aria-current="page"] { color: var(--text); font-weight: 600; border-color: var(--border); background: var(--bg); }

/* Logo + wordmark (split.rs) */
.logo-img { width: 28px; height: 28px; flex: none; display: block; }
.brand-name { letter-spacing: -0.01em; }
.tld { color: var(--accent); }