:root {
  --paper: #f2f0ea;      /* warm ground — the friendliest single move in the system */
  --sheet: #ffffff;
  --ink: #111111;
  --ink-soft: #3d3d3d;
  --ink-muted: #5e5e5e;
  --rule: #111111;
  --hairline: #d3d0c8;
  --blue: #1d2bd6;
  --accent: #d92d17;     /* on white text: 4.84:1 */
  --accent-text: #c42a15;/* as text on cream: 5.00:1 */
  --lime: #d8f24a;
  --unit: 8px;
}

* { box-sizing: border-box; }
/* Author display rules outrank the UA [hidden] rule, so every hidden element with a
   display of its own would stay visible. One guard here beats patching each selector. */
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
h1, h2, h3 { font-weight: 700; letter-spacing: -.02em; }
h1, h2, p { text-wrap: pretty; }
svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: butt; stroke-linejoin: miter; }

/* Uppercase micro-label: the only decorative type move in the system. */
.eyebrow, .payment-topline, .open-badge, .section-heading h2, .nav-item, .receipt-count, .expense-payer {
  font-size: 11px;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 224px;
  padding: 24px 24px 24px 32px;
  border-right: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  background: var(--paper);
  z-index: 2;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 15px; font-weight: 700; letter-spacing: -.02em; text-transform: lowercase; }
.brand-mark { width: 24px; height: 24px; display: inline-grid; place-items: center; background: var(--ink); color: #fff; font-size: 13px; font-weight: 700; }
nav { margin-top: 56px; display: grid; }
.nav-item { min-height: 36px; display: flex; align-items: center; gap: 10px; color: var(--ink-muted); text-decoration: none; font-weight: 500; border-bottom: 1px solid var(--hairline); }
.nav-item:first-child { border-top: 1px solid var(--rule); }
.nav-item:hover { color: var(--ink); }
.nav-item.active { color: var(--ink); font-weight: 700; }
.nav-item svg { width: 14px; }
.house-card { margin-top: auto; display: grid; grid-template-columns: 28px 1fr 20px; gap: 10px; align-items: center; padding-top: 14px; border-top: 1px solid var(--rule); }
.house-icon, .mini-avatar { display: grid; place-items: center; background: var(--ink); color: #fff; font-size: 9px; font-weight: 700; letter-spacing: .04em; }
.house-icon { width: 28px; height: 28px; }
.house-card strong, .house-card span { display: block; }
.house-card strong { font-size: 12px; }
.house-card div span { color: var(--ink-muted); font-size: 11px; }
.house-card button { border: 0; padding: 0; background: none; color: var(--ink-muted); cursor: pointer; }

main { margin-left: 224px; padding: 0 32px 64px; max-width: 1360px; }
.topbar { min-height: 96px; display: flex; justify-content: space-between; align-items: flex-end; padding-bottom: 16px; }
.eyebrow { margin: 0 0 4px; color: var(--ink-muted); font-weight: 700; }
h1 { margin: 0; font-size: 26px; }
.top-actions { display: flex; align-items: center; gap: 8px; }
.icon-button { position: relative; width: 32px; height: 32px; display: grid; place-items: center; border: 0; background: transparent; color: var(--ink); cursor: pointer; font-size: 20px; }
.icon-button:hover { color: var(--accent-text); }
.icon-button:focus-visible, button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.notification-dot { position: absolute; right: 5px; top: 4px; width: 6px; height: 6px; background: var(--accent-text); }
.whoami-label { display: block; margin: 0; color: var(--ink-muted); font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
#whoami { width: auto; min-height: 32px; border: 1px solid var(--rule); font-size: 13px; font-weight: 500; }

/* Settlement: one saturated field, flush-left figure. */
.settlement { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; padding: 36px; background: var(--blue); color: #fff; }
.settlement .eyebrow { color: rgba(255,255,255,.72); }
.total { margin: 0 0 12px; font-size: clamp(52px, 7.5vw, 96px); line-height: .9; font-weight: 700; letter-spacing: -.045em; }
.settlement-note { margin: 0; color: rgba(255,255,255,.85); font-size: 13px; }
.status-dot { width: 8px; height: 8px; margin-right: 7px; display: inline-block; background: var(--lime); }
.member-stack { display: flex; align-items: stretch; }
.member { width: 88px; padding: 12px; border-left: 1px solid rgba(255,255,255,.35); }
.member:last-child { border-right: 1px solid rgba(255,255,255,.35); }
.member > span { display: block; margin-bottom: 22px; font-size: 11px; font-weight: 700; letter-spacing: .06em; }
.member small { display: block; color: rgba(255,255,255,.85); font-size: 11px; }
.member.paid small { display: inline-block; padding: 2px 6px; background: var(--lime); color: var(--ink); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }

.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 288px; gap: 32px; align-items: start; margin-top: 32px; }
.ledger, .receipts { padding: 0; background: none; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; padding-bottom: 10px; border-bottom: 1px solid var(--rule); }
.section-heading h2 { margin: 0; font-weight: 700; letter-spacing: .09em; }
.section-heading p { margin: 3px 0 0; color: var(--ink-muted); font-size: 12px; text-transform: none; letter-spacing: 0; }
.secondary-button, .receipt-button { min-height: 32px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--rule); background: var(--paper); padding: 0 12px; font-weight: 700; font-size: 11px; letter-spacing: .06em; text-transform: uppercase; cursor: pointer; }
.secondary-button:hover, .receipt-button:hover { background: var(--ink); color: #fff; }
.secondary-button svg { width: 12px; }
.expense { display: grid; grid-template-columns: 28px minmax(120px,1fr) 132px 108px; gap: 16px; align-items: center; min-height: 62px; border-bottom: 1px solid var(--hairline); }
/* Flat colour swatches, cycled by position — Bauhaus block, no extra markup. */
.expense-icon { width: 28px; height: 28px; display: grid; place-items: center; background: var(--lime); color: var(--ink); }
.expense:nth-child(4n+2) .expense-icon { background: var(--blue); color: #fff; }
.expense:nth-child(4n+3) .expense-icon { background: var(--accent); color: #fff; }
.expense:nth-child(4n+4) .expense-icon { background: var(--ink); color: #fff; }
.expense-icon svg { width: 15px; }
.expense strong, .expense span { display: block; }
.expense strong { font-size: 13px; font-weight: 500; }
.expense small { color: var(--ink-muted); font-size: 11px; }
.expense-payer { color: var(--ink-muted); }
.expense-amount { text-align: right; font-size: 13px; font-weight: 500; }
.ledger-total { display: flex; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--rule); font-size: 13px; font-weight: 700; }

.payment-card { position: sticky; top: 24px; padding: 20px 20px 20px; border-top: 4px solid var(--rule); background: var(--sheet); }
.payment-topline { display: flex; justify-content: space-between; align-items: center; color: var(--ink-muted); font-weight: 700; }
.open-badge { color: var(--accent-text); font-weight: 700; }
.open-badge.is-paid { padding: 2px 6px; background: var(--lime); color: var(--ink); }
.payment-card h2 { margin: 12px 0 2px; font-size: 40px; line-height: 1; font-weight: 700; letter-spacing: -.04em; }
.payment-card > p { margin: 4px 0 20px; color: var(--ink-muted); font-size: 11px; }
.payment-breakdown { display: grid; }
.payment-breakdown div { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; border-top: 1px solid var(--hairline); font-size: 12px; }
.payment-breakdown span { color: var(--ink-muted); }
.breakdown-total { border-top: 1px solid var(--rule) !important; font-weight: 700; }
.breakdown-total span { color: var(--ink); }
.pay-button { width: 100%; min-height: 46px; margin-top: 16px; display: flex; align-items: center; justify-content: center; gap: 8px; border: 0; background: var(--ink); color: #fff; font-weight: 700; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; cursor: pointer; transition: background 120ms; }
.pay-button:hover { background: var(--ink-soft); }
/* The accent marks one thing only: the action that moves money. */
#pay-button { background: var(--accent); }
#pay-button:hover { background: var(--ink); }
/* Same id specificity, or the rule above keeps a dead button looking clickable. */
#pay-button:disabled { background: var(--ink); cursor: default; }
#pay-button[aria-busy="true"] { background: var(--ink-muted); cursor: progress; }
.pay-button:disabled { background: var(--ink); cursor: default; }
.pay-button[aria-busy="true"] { background: var(--ink-muted); cursor: progress; }
.pay-button svg { width: 14px; }
.payment-card .secure-note { display: flex; align-items: center; gap: 6px; margin: 10px 0 20px; color: var(--ink-muted); font-size: 11px; }
.secure-note svg { width: 12px; }
.deadline { display: flex; justify-content: space-between; padding-top: 10px; border-top: 1px solid var(--hairline); color: var(--ink-muted); font-size: 11px; }
.deadline strong { color: var(--ink); }

.receipts { margin-top: 40px; }
.receipt-count { color: var(--ink-muted); font-weight: 700; }
.receipt-row { min-height: 62px; display: grid; grid-template-columns: 1fr 160px 96px 88px; gap: 16px; align-items: center; border-bottom: 1px solid var(--hairline); }
.receipt-person { display: flex; align-items: center; gap: 12px; }
.mini-avatar { width: 28px; height: 28px; }
.receipt-person strong, .receipt-person small { display: block; }
.receipt-person strong { font-size: 13px; font-weight: 500; }
.receipt-person small { color: var(--ink-muted); font-size: 11px; }
.receipt-reference { color: var(--ink-muted); font-size: 11px; }
.receipt-amount { text-align: right; font-size: 13px; font-weight: 500; }
.receipt-button { min-height: 28px; }

dialog { width: min(460px, calc(100vw - 32px)); padding: 0; border: 2px solid var(--rule); background: var(--paper); color: var(--ink); }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog form, .receipt-sheet { padding: 28px; }
.dialog-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding-bottom: 12px; border-bottom: 3px solid var(--rule); }
.dialog-heading h2 { margin: 0; font-size: 22px; }
label { display: grid; gap: 6px; margin-top: 18px; color: var(--ink-muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
input, select { width: 100%; min-height: 42px; padding: 0 10px; border: 1px solid var(--hairline); background: var(--sheet); color: var(--ink); font-size: 14px; letter-spacing: 0; text-transform: none; }
input:focus, select:focus { border-color: var(--ink); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.split-hint { margin: 16px 0 0; color: var(--ink-muted); font-size: 11px; }
.receipt-brand { display: flex; align-items: center; gap: 8px; margin-bottom: 40px; font-size: 15px; text-transform: lowercase; }
.receipt-sheet h2 { margin: 4px 0 8px; font-size: 26px; }
.receipt-lead { color: var(--ink-soft); font-size: 13px; }
.receipt-sheet dl { margin: 28px 0; border-bottom: 1px solid var(--rule); }
.receipt-sheet dl div { display: flex; justify-content: space-between; gap: 24px; padding: 9px 0; border-top: 1px solid var(--hairline); font-size: 13px; }
.receipt-sheet dl div:first-child { border-top: 1px solid var(--rule); }
.receipt-sheet dt { color: var(--ink-muted); }
.receipt-sheet dd { margin: 0; text-align: right; font-weight: 700; }
.receipt-paid { color: var(--ink); }
.receipt-legal { color: var(--ink-muted); font-size: 10px; line-height: 1.5; }
.receipt-actions { display: grid; grid-template-columns: 1fr 2fr; gap: 8px; margin-top: 28px; }
.receipt-actions .pay-button { margin: 0; }
.toast { position: fixed; right: 32px; bottom: 32px; max-width: 360px; padding: 12px 16px; background: var(--ink); color: #fff; font-size: 12px; opacity: 0; pointer-events: none; transition: opacity 150ms; z-index: 5; }
.toast.show { opacity: 1; }

@media (max-width: 900px) {
  .sidebar { position: static; width: 100%; height: 56px; padding: 0 20px; flex-direction: row; align-items: center; border-right: 0; border-bottom: 1px solid var(--rule); }
  .sidebar nav { margin: 0 0 0 auto; display: flex; gap: 20px; }
  .nav-item { border: 0; }
  .nav-item:first-child { border-top: 0; }
  .nav-item span, .nav-item { font-size: 0; }
  .house-card { display: none; }
  main { margin-left: 0; padding: 0 20px 48px; }
  .settlement { flex-direction: column; align-items: stretch; gap: 32px; }
  .member-stack { width: 100%; }
  .member { flex: 1; width: auto; }
  .content-grid { grid-template-columns: 1fr; gap: 24px; }
  .payment-card { position: static; grid-row: 1; }
}

@media (max-width: 600px) {
  .brand > span:last-child { display: none; }
  .settlement { padding: 24px; }
  .expense { grid-template-columns: 24px 1fr 88px; gap: 12px; }
  .expense-payer { display: none; }
  .receipt-row { grid-template-columns: 1fr auto; padding: 10px 0; }
  .receipt-reference { display: none; }
  .receipt-amount { grid-row: 2; grid-column: 1; text-align: left; padding-left: 40px; }
  .receipt-button { grid-row: 1 / 3; grid-column: 2; }
  .form-row { grid-template-columns: 1fr; }
}

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

@media print {
  body * { visibility: hidden; }
  #receipt-dialog, #receipt-dialog * { visibility: visible; }
  #receipt-dialog { position: absolute; inset: 0; width: 100%; border: 0; }
  .receipt-actions { display: none; }
}

/* Auth gate */
/* dvh tracks the visible viewport as mobile toolbars collapse; the vh line above it is
   the fallback for browsers without dvh. Plain 100vh leaves dead scroll on iOS. */
#gate { min-height: 100vh; min-height: 100dvh; display: grid; place-items: center; padding: 32px 20px; background: var(--paper); }
.gate-panel { width: min(400px, 100%); padding: 32px; background: var(--sheet); border-top: 4px solid var(--rule); }
.gate-panel .brand { margin-bottom: 40px; }
.gate-panel h1 { margin: 0 0 20px; font-size: 26px; }
.gate-panel .pay-button { margin-top: 24px; }
.gate-panel .split-hint { text-align: center; }
.link-button { border: 0; padding: 0; background: none; color: var(--accent-text); font-size: 11px; font-weight: 700; text-decoration: underline; cursor: pointer; }
.sidebar-actions { display: grid; gap: 10px; justify-items: start; margin-top: 14px; }
.sidebar-actions .secondary-button { width: 100%; }
.empty { margin: 0; padding: 28px 0; color: var(--ink-muted); font-size: 13px; }

/* Contracts */
.heading-actions { display: flex; gap: 8px; }
.warning-banner { margin: 12px 0 0; padding: 8px 12px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; }
.contract { display: grid; grid-template-columns: minmax(140px,1fr) 130px 170px 84px 220px; gap: 16px; align-items: center; min-height: 62px; border-bottom: 1px solid var(--hairline); }
.contract-main strong { display: block; font-size: 13px; font-weight: 500; }
.contract-main small { color: var(--ink-muted); font-size: 11px; }
.contract-person, .contract-deadline { color: var(--ink-muted); font-size: 12px; }
.contract-deadline.is-soon { color: var(--accent-text); font-weight: 700; }
.contract-amount { text-align: right; font-size: 13px; font-weight: 500; }
.contract-actions { display: flex; gap: 8px; justify-content: flex-end; }
.contract-actions select { min-height: 28px; width: auto; font-size: 11px; }
.contract.is-cancelled { opacity: .55; }
.tag { display: inline-block; padding: 1px 5px; background: var(--lime); color: var(--ink); font-size: 9px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; vertical-align: middle; }
.tag-alert { background: var(--accent); color: #fff; }
.checkbox-row { display: flex; align-items: flex-start; gap: 10px; text-transform: none; letter-spacing: 0; font-weight: 400; font-size: 12px; color: var(--ink-soft); }
.checkbox-row input { width: 18px; min-height: 18px; margin-top: 1px; flex: none; }
#letter-text { width: 100%; margin-top: 16px; padding: 14px; border: 1px solid var(--hairline); background: var(--sheet); color: var(--ink); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 12px; line-height: 1.55; resize: vertical; }
#letter-dialog { width: min(640px, calc(100vw - 32px)); }

@media (max-width: 900px) {
  .contract { grid-template-columns: 1fr auto; gap: 8px; padding: 14px 0; }
  .contract-deadline, .contract-owner { grid-column: 1; font-size: 11px; }
  .contract-amount { grid-row: 1; grid-column: 2; }
  .contract-actions { grid-column: 1 / 3; justify-content: flex-start; }
  .heading-actions { flex-wrap: wrap; }
}

/* Household */
.sub-heading { margin: 32px 0 4px; font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; }
.sub-note { color: var(--ink-muted); font-size: 12px; }
.sub-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
.sub-heading + .sub-note { display: block; margin-bottom: 8px; padding-bottom: 8px; border-bottom: 1px solid var(--rule); }
.upload-button { display: inline-flex; margin: 0; letter-spacing: .06em; }
.occupancy { display: grid; grid-template-columns: 1fr 190px 190px; gap: 16px; align-items: center; min-height: 58px; border-bottom: 1px solid var(--hairline); }
.inline-field { margin: 0; display: grid; gap: 4px; font-size: 10px; }
.inline-field input { min-height: 32px; font-size: 12px; }
.bill { padding: 14px 0; border-bottom: 1px solid var(--hairline); }
.bill-head { display: grid; grid-template-columns: 1fr auto 100px; gap: 12px; align-items: baseline; padding-bottom: 8px; }
.bill-head small { color: var(--ink-muted); font-size: 11px; }
.bill-row { display: grid; grid-template-columns: 1fr 90px 100px; gap: 12px; padding: 5px 0 5px 16px; font-size: 12px; border-left: 2px solid var(--hairline); }
.bill-row strong { text-align: right; }
.checklist-row { display: flex; align-items: center; gap: 12px; margin: 0; padding: 12px 0; border-bottom: 1px solid var(--hairline); text-transform: none; letter-spacing: 0; font-weight: 400; font-size: 13px; color: var(--ink); }
.checklist-row input { width: 18px; min-height: 18px; flex: none; }
#wgb-text { width: 100%; margin-top: 16px; padding: 14px; border: 1px solid var(--hairline); background: var(--sheet); color: var(--ink); font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 12px; line-height: 1.55; resize: vertical; }
#wgb-dialog { width: min(640px, calc(100vw - 32px)); }
a.receipt-button { text-decoration: none; }

@media (max-width: 900px) {
  .occupancy { grid-template-columns: 1fr 1fr; }
  .occupancy .contract-main { grid-column: 1 / 3; }
  .bill-head, .bill-row { grid-template-columns: 1fr auto; }
}

.checkline { display: flex; flex-direction: row; align-items: center; gap: 8px; }
.checkline input { width: auto; }

/* Internal console. Deliberately plain: three columns of lists, no chrome. */
.admin-body { padding: 24px clamp(16px, 4vw, 48px) 80px; }
.admin-head { display: flex; justify-content: space-between; align-items: flex-end; padding-bottom: 16px; border-bottom: 1px solid var(--rule); }
.admin-head h1 { margin: 0; font-size: 28px; }
.admin-who { margin: 0; color: var(--ink-muted); font-size: 12px; }
.admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; margin-top: 28px; align-items: start; }
.admin-panel { background: var(--sheet); padding: 20px; }
.admin-sub { margin-top: 28px; }
.admin-form { display: grid; gap: 10px; margin-top: 14px; }
.admin-form label { display: grid; gap: 4px; font-size: 12px; font-weight: 700; color: var(--ink-muted); }
.admin-form input, .admin-form select, .admin-form textarea {
  min-height: 38px; padding: 6px 10px; border: 1px solid var(--hairline);
  background: var(--paper); color: var(--ink); font: inherit; font-weight: 400;
}
.admin-filter { width: 100%; min-height: 38px; margin: 12px 0; padding: 6px 10px; border: 1px solid var(--hairline); background: var(--paper); }
.admin-list { list-style: none; margin: 0; padding: 0; max-height: 420px; overflow-y: auto; }
.admin-list li { display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--hairline); }
.admin-row { flex: 1; display: grid; gap: 2px; padding: 10px 0; border: 0; background: none; text-align: left; cursor: pointer; }
.admin-row strong { font-size: 14px; }
.admin-row small { color: var(--ink-muted); font-size: 12px; }
.admin-row.selected strong { color: var(--blue); }
.admin-denied { max-width: 480px; margin: 60px auto; text-align: center; }
.admin-claim { max-width: 420px; margin: 60px auto; }
.admin-claim p { color: var(--ink-muted); font-size: 14px; }
.admin-code { display: flex; align-items: center; gap: 8px; margin-top: 10px; padding: 10px; background: var(--paper); border: 1px solid var(--hairline); word-break: break-all; font-size: 12px; }