/* Layout: ledger-style tool pages. Header bar, tool index rail on desktop / chip row on phone, form column beside a "tally" result column. */
:root {
  --bg: #F2F5F3;
  --surface: #FFFFFF;
  --ink: #14231E;
  --muted: #56665F;
  --line: #D4DCD7;
  --accent: #0E6A55;
  --accent-ink: #FFFFFF;
  --accent-soft: #E0EEE8;
  --good: #1D7745;
  --warn: #A9510F;
  --bad: #B42318;
  --paper: #FFFFFF;
  --paper-ink: #1A1F1D;
  --paper-line: #E1E5E3;
  --font-display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E1412; --surface: #151D1A; --ink: #E4EBE8; --muted: #94A49D; --line: #29352F;
    --accent: #52C4A2; --accent-ink: #052019; --accent-soft: #163329;
    --good: #5CC98A; --warn: #E8A063; --bad: #F2796C;
    --paper: #FAFBFA; --paper-ink: #1A1F1D; --paper-line: #E1E5E3;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0E1412; --surface: #151D1A; --ink: #E4EBE8; --muted: #94A49D; --line: #29352F;
  --accent: #52C4A2; --accent-ink: #052019; --accent-soft: #163329;
  --good: #5CC98A; --warn: #E8A063; --bad: #F2796C;
  --paper: #FAFBFA; --paper-ink: #1A1F1D; --paper-line: #E1E5E3;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
}
a { color: var(--accent); }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem); font-weight: 700; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; font-weight: 650; }
h3 { font-size: 1rem; font-weight: 650; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.mono, .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* Header */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 21; background: var(--bg); }
.topbar-inner {
  max-width: 1180px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 12px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark {
  width: 30px; height: 30px; border-radius: 7px; background: var(--accent); color: var(--accent-ink);
  display: grid; place-items: center; font-family: var(--font-mono); font-weight: 600; font-size: 15px;
}
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: -0.01em; }
.brand-tag { color: var(--muted); font-size: 0.85rem; }
.cur-pick { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--muted); }
.cur-pick select { width: auto; }

/* Shell */
.shell {
  max-width: 1180px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 24px 64px;
  display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px;
}
.rail { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 72px); align-self: start; }
.rail-group + .rail-group { margin-top: 16px; }
.rail-label { font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.rail ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.rail a {
  display: block; padding: 7px 10px; border-radius: 7px; color: var(--ink); text-decoration: none; font-size: 0.93rem;
}
.rail a:hover { background: var(--accent-soft); }
.rail a[aria-current="page"] { background: var(--accent); color: var(--accent-ink); font-weight: 500; }

@media (max-width: 860px) {
  .topbar { position: static; }
  .brand-tag { display: none; }
  .shell { grid-template-columns: minmax(0, 1fr); gap: 16px; padding-block: 12px 48px; }
  .rail { position: static; }
  .rail-label { display: none; }
  .rail { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: thin; }
  .rail-group, .rail ul, .rail li { display: contents; }
  .rail-group + .rail-group { margin-top: 0; }
  .rail a { white-space: nowrap; border: 1px solid var(--line); background: var(--surface); }
}

/* Tool section */
.tool-head { display: grid; gap: 8px; margin-bottom: 20px; }
.eyebrow { font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.lede { color: var(--muted); max-width: 62ch; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 960px) { .tool-grid { grid-template-columns: minmax(0, 1fr); } }

.panel {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; display: grid; gap: 14px; min-width: 0;
}
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 14px; }
.fields .full { grid-column: 1 / -1; }
@media (max-width: 480px) { .fields { grid-template-columns: minmax(0, 1fr); } }
.field { display: grid; gap: 5px; min-width: 0; align-content: start; }
.field label, .lbl { font-size: 0.82rem; font-weight: 500; color: var(--ink); }
.hint { font-size: 0.78rem; color: var(--muted); }
.affix { display: flex; align-items: stretch; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); overflow: hidden; }
.affix:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.affix span { padding: 0 10px; display: grid; place-items: center; color: var(--muted); font-size: 0.85rem; font-family: var(--font-mono); }
.affix input { border: 0; background: transparent; box-shadow: none; }
.affix input:focus { box-shadow: none; }
input, select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; min-width: 0;
}
input[type="number"], input.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
textarea { resize: vertical; min-height: 64px; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: var(--bg); }
.seg button { font: inherit; font-size: 0.85rem; border: 0; background: transparent; color: var(--ink); padding: 7px 12px; cursor: pointer; }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); }

.btn {
  font: inherit; font-size: 0.9rem; font-weight: 500; cursor: pointer;
  border-radius: 8px; padding: 8px 14px; border: 1px solid var(--accent);
  background: var(--accent); color: var(--accent-ink);
}
.btn.ghost { background: transparent; color: var(--accent); }
.btn.small { padding: 5px 10px; font-size: 0.82rem; }
.btn:hover { filter: brightness(1.05); }
.actions { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* Tally (results) */
.tally { display: grid; gap: 0; }
.tally-row {
  display: flex; align-items: baseline; gap: 8px; padding: 7px 0; font-size: 0.93rem;
}
.tally-row .k { color: var(--muted); }
.tally-row .dots { flex: 1; border-bottom: 1px dotted var(--line); transform: translateY(-4px); min-width: 12px; }
.tally-row .v { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; }
.tally-total {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  margin-top: 6px; padding: 10px 0 6px; border-top: 1px solid var(--ink);
}
.tally-total .k { font-weight: 600; }
.tally-total .v {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-weight: 600;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  border-bottom: 3px double var(--ink); padding-bottom: 2px; line-height: 1.2;
}
.result-note { font-size: 0.85rem; color: var(--muted); }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 600; padding: 3px 9px; border-radius: 999px; border: 1px solid currentColor; }
.pill.good { color: var(--good); } .pill.warn { color: var(--warn); } .pill.bad { color: var(--bad); }
.pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }

/* Tables */
.table-wrap { overflow-x: auto; }
table.items { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.items th { text-align: left; font-weight: 500; color: var(--muted); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; padding: 4px 6px; }
table.items td { padding: 4px 6px; vertical-align: middle; }
table.items td.amt { font-family: var(--font-mono); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
table.items input { padding: 6px 8px; }
.icon-btn { border: 0; background: transparent; color: var(--muted); cursor: pointer; font-size: 1.1rem; padding: 4px 6px; border-radius: 6px; }
.icon-btn:hover { color: var(--bad); background: var(--accent-soft); }

/* Invoice paper */
.paper {
  background: var(--paper); color: var(--paper-ink); border-radius: 6px;
  border: 1px solid var(--line); padding: 26px 24px; font-size: 0.86rem;
  box-shadow: 0 1px 0 var(--line), 0 12px 30px -18px rgba(0,0,0,0.35);
  display: grid; gap: 18px; min-width: 0;
}
.paper .p-top { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.paper .p-title { font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; letter-spacing: 0.02em; }
.paper .p-meta { font-family: var(--font-mono); font-size: 0.8rem; display: grid; gap: 2px; text-align: right; }
.paper .p-parties { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.paper .p-label { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: #6B7570; margin-bottom: 3px; }
.paper .p-block { white-space: pre-line; overflow-wrap: anywhere; }
.paper table { width: 100%; border-collapse: collapse; }
.paper th { text-align: left; font-size: 0.68rem; letter-spacing: 0.08em; text-transform: uppercase; color: #6B7570; border-bottom: 1px solid var(--paper-ink); padding: 6px 4px; }
.paper td { padding: 7px 4px; border-bottom: 1px solid var(--paper-line); vertical-align: top; }
.paper td.r, .paper th.r { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.paper .p-sums { display: grid; justify-content: end; gap: 3px; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.paper .p-sums div { display: flex; justify-content: space-between; gap: 32px; }
.paper .p-sums .grand { font-weight: 600; font-size: 1.05rem; border-top: 1px solid var(--paper-ink); padding-top: 6px; margin-top: 3px; }
.paper .p-notes { color: #4A5450; white-space: pre-line; border-top: 1px solid var(--paper-line); padding-top: 10px; }
@media (max-width: 480px) { .paper { padding: 18px 14px; } .paper .p-parties { grid-template-columns: minmax(0, 1fr); } }

/* Explainers */
.explain { margin-top: 28px; display: grid; gap: 14px; max-width: 72ch; }
.explain p { color: var(--ink); }
.formula { font-family: var(--font-mono); font-size: 0.85rem; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; overflow-x: auto; white-space: pre; }
details { border-top: 1px solid var(--line); padding: 10px 0; }
details summary { cursor: pointer; font-weight: 500; }
details p { margin-top: 6px; color: var(--muted); }

.ad-slot {
  margin-top: 24px; border: 1px dashed var(--line); border-radius: var(--radius);
  min-height: 90px; display: grid; place-items: center; color: var(--muted); font-size: 0.78rem;
  letter-spacing: 0.06em; text-transform: uppercase;
}
.partner { margin-top: 16px; display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: 14px 16px; border-radius: var(--radius); background: var(--accent-soft); }
.partner p { font-size: 0.9rem; }

.toast {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 8px; font-size: 0.88rem; z-index: 50;
}
.copy-fallback { width: 100%; min-height: 120px; font-family: var(--font-mono); font-size: 0.8rem; }

.site-foot {
  border-top: 1px solid var(--line); color: var(--muted); font-size: 0.82rem;
}
.site-foot .inner {
  max-width: 1180px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 20px;
  display: flex; gap: 16px; justify-content: space-between; flex-wrap: wrap;
}
.home-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin-top: 20px; }
.home-card { display: grid; gap: 4px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); text-decoration: none; color: var(--ink); }
.home-card:hover { border-color: var(--accent); }
.home-card span { color: var(--muted); font-size: 0.88rem; }
.preview-note { font-size: 0.85rem; color: var(--muted); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 18px; }

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

@media print {
  body * { visibility: hidden; }
  .paper, .paper * { visibility: visible; }
  .paper { position: absolute; left: 0; top: 0; width: 100%; border: 0; box-shadow: none; }
}

.home-group { margin-top: 28px; }
.home-group + .home-grid { margin-top: 12px; }
body.embed { padding: 12px; }
body.embed .tool-grid { gap: 12px; }
.embed-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 12px; font-size: 0.82rem; }
.embed-foot select { width: auto; }