/* KhataIQ — spreadsheet-native. Layout: a single 1180px column; tools sit in bordered "sheets" with
   row gutters, a formula bar and cell-style inputs; prose sits in a 68ch reading column beside a narrow rail. */
:root {
  --paper: #ffffff; --sheet: #f6f8f7; --head: #edf1ee; --grid: #dee4e0; --grid-2: #c4cdc7;
  --ink: #17211b; --ink-2: #485650; --ink-3: #6f7d75;
  --accent: #12704a; --accent-ink: #0b5335; --accent-soft: #e2f0e8; --on-accent: #ffffff;
  --sel: #fff1bd; --sel-line: #12704a; --focus: #2a66d9;
  --pos: #12704a; --neg: #b3261e; --warn-bg: #fff6e0; --warn-line: #d79b1c;
  --s1: #12704a; --s2: #c4701a; --s3: #3a6bb3;
  --f-ui: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-head: 'IBM Plex Sans Condensed', 'IBM Plex Sans', system-ui, sans-serif;
  --f-num: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', Consolas, monospace;
  --wrap: 1180px; --r: 3px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #131815; --sheet: #181e1a; --head: #1d2420; --grid: #29312c; --grid-2: #3a443e;
    --ink: #e3eae5; --ink-2: #a7b5ad; --ink-3: #849289;
    --accent: #4fbf8b; --accent-ink: #7ed6ac; --accent-soft: #1b2e24; --on-accent: #0c1510;
    --sel: #3b3519; --sel-line: #4fbf8b; --focus: #7aa7ff;
    --pos: #5cc796; --neg: #ff8a80; --warn-bg: #2f2814; --warn-line: #c9952a;
    --s1: #4fbf8b; --s2: #e39a4a; --s3: #7fa8e8; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #131815; --sheet: #181e1a; --head: #1d2420; --grid: #29312c; --grid-2: #3a443e;
  --ink: #e3eae5; --ink-2: #a7b5ad; --ink-3: #849289;
  --accent: #4fbf8b; --accent-ink: #7ed6ac; --accent-soft: #1b2e24; --on-accent: #0c1510;
  --sel: #3b3519; --sel-line: #4fbf8b; --focus: #7aa7ff;
  --pos: #5cc796; --neg: #ff8a80; --warn-bg: #2f2814; --warn-line: #c9952a;
  --s1: #4fbf8b; --s2: #e39a4a; --s3: #7fa8e8; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--sheet); color: var(--ink); font: 15px/1.55 var(--f-ui); }
a { color: var(--accent-ink); text-underline-offset: 2px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--f-head); line-height: 1.15; text-wrap: balance; margin: 0; letter-spacing: -0.005em; }
h1 { font-size: clamp(26px, 3.4vw, 36px); font-weight: 600; }
h2 { font-size: 22px; font-weight: 600; }
h3 { font-size: 17px; font-weight: 600; }
p { margin: 0; }
.num, .mono { font-family: var(--f-num); font-variant-numeric: tabular-nums; }
.muted { color: var(--ink-3); }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 12px; top: 12px; z-index: 50; background: var(--paper); padding: 8px 12px; }

/* ---------- header ---------- */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--paper); }
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: var(--paper); border-bottom: 1px solid var(--grid-2); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 54px; }
.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--ink); font: 600 19px var(--f-head); letter-spacing: -0.01em; flex: none; }
.logo:hover { color: var(--ink); }
.logo svg { width: 24px; height: 24px; flex: none; }
.logo b { color: var(--accent); font-weight: 600; }
.nav { display: flex; gap: 2px; }
.nav a { color: var(--ink-2); text-decoration: none; padding: 6px 10px; border-radius: var(--r); font-size: 14px; }
.nav a:hover { background: var(--head); color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--head); font-weight: 500; }
.search { position: relative; margin-left: auto; width: min(300px, 40vw); }
.search input { width: 100%; font: 14px var(--f-ui); padding: 7px 34px 7px 10px; border: 1px solid var(--grid-2); background: var(--sheet); color: var(--ink); border-radius: var(--r); }
.search input:focus { outline: 2px solid var(--sel-line); outline-offset: -1px; background: var(--paper); }
.search kbd { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font: 11px var(--f-num); color: var(--ink-3); border: 1px solid var(--grid-2); border-radius: 3px; padding: 0 5px; }
.q-res { position: absolute; top: calc(100% + 4px); left: 0; right: 0; background: var(--paper); border: 1px solid var(--grid-2); box-shadow: 0 8px 24px rgba(0,0,0,.12); z-index: 40; max-height: 70vh; overflow: auto; }
.q-res a { display: flex; justify-content: space-between; gap: 10px; padding: 8px 10px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--grid); font-size: 14px; }
.q-res a small { color: var(--ink-3); white-space: nowrap; }
.q-res a.on, .q-res a:hover { background: var(--sel); }
.q-none { padding: 10px; color: var(--ink-3); font-size: 14px; }
.nav-toggle { display: none; }
@media (max-width: 860px) {
  .top .wrap { flex-wrap: wrap; gap: 8px 12px; padding-block: 8px; }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav { display: none; order: 4; width: 100%; flex-direction: column; padding-bottom: 6px; }
  .nav-open .nav { display: flex; }
  .search { order: 3; width: 100%; margin-left: 0; }
}

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 6px; font: 500 14px var(--f-ui); color: var(--ink); background: var(--paper); border: 1px solid var(--grid-2); border-radius: var(--r); padding: 7px 12px; cursor: pointer; text-decoration: none; line-height: 1.2; }
.btn:hover { background: var(--head); color: var(--ink); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: var(--on-accent); }
.btn.small { padding: 5px 9px; font-size: 13px; }
.btn svg { width: 15px; height: 15px; }
.btn:disabled { opacity: .6; cursor: default; }
button.link { background: none; border: 0; color: var(--accent-ink); font: inherit; cursor: pointer; padding: 2px 4px; text-decoration: underline; text-underline-offset: 2px; }

/* ---------- page heads ---------- */
.crumbs { font-size: 13px; color: var(--ink-3); padding-top: 18px; }
.crumbs a { color: var(--ink-3); }
.page-head { padding-block: 10px 20px; display: grid; gap: 8px; }
.page-head p { color: var(--ink-2); max-width: 70ch; font-size: 16px; }
.eyebrow { font: 500 12px var(--f-num); text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); }

/* ---------- sheet primitives ---------- */
.sheet { background: var(--paper); border: 1px solid var(--grid-2); min-width: 0; }
.sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; background: var(--head); border-bottom: 1px solid var(--grid-2); padding: 7px 10px; font: 600 12px var(--f-num); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); }
.sheet-head .col { display: inline-block; min-width: 18px; text-align: center; border: 1px solid var(--grid-2); background: var(--paper); margin-right: 6px; border-radius: 2px; }

/* ---------- calculator ---------- */
.calc-grid { display: grid; grid-template-columns: minmax(0, 420px) minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 900px) { .calc-grid { grid-template-columns: minmax(0, 1fr); } }
.inputs { counter-reset: row; }
.irow { display: grid; grid-template-columns: 34px minmax(0, 1fr) minmax(0, 168px); border-bottom: 1px solid var(--grid); align-items: stretch; }
.irow::before { counter-increment: row; content: counter(row); display: grid; place-items: center; background: var(--head); border-right: 1px solid var(--grid); font: 11px var(--f-num); color: var(--ink-3); }
.irow label, .irow .lab { padding: 8px 10px; font-size: 14px; color: var(--ink); align-self: center; }
.irow small { display: block; color: var(--ink-3); font-size: 12px; line-height: 1.35; margin-top: 2px; }
.irow .words { grid-column: 3; font: 11px/1.2 var(--f-num); color: var(--ink-3); text-align: right; padding: 0 10px 6px; border-left: 1px solid var(--grid); background: var(--paper); }
.irow:has(.words:not(:empty))::before, .irow:has(.words:not(:empty)) > label { grid-row: span 2; }
.cell:focus-within + .words { background: var(--sel); }
.irow .words:empty { display: none; }
.cell { display: flex; align-items: center; border-left: 1px solid var(--grid); background: var(--paper); position: relative; }
.cell:focus-within { outline: 2px solid var(--sel-line); outline-offset: -2px; z-index: 1; background: var(--sel); }
.cell input, .cell select { width: 100%; min-width: 0; border: 0; background: transparent; color: var(--ink); font: 15px var(--f-num); font-variant-numeric: tabular-nums; padding: 9px 10px; text-align: right; appearance: none; -webkit-appearance: none; }
.cell input:focus, .cell select:focus { outline: none; }
.cell select { text-align: left; text-align-last: left; font: 14px var(--f-ui); padding-right: 26px; cursor: pointer; background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 15px) 50%, calc(100% - 10px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.cell input[type=date] { font-size: 14px; text-align: left; }
.cell .pre, .cell .suf { font: 13px var(--f-num); color: var(--ink-3); padding: 0 0 0 10px; }
.cell .suf { padding: 0 10px 0 0; }
.cell .pre + input { padding-left: 4px; }
.group-row { padding: 7px 10px 7px 44px; background: var(--sheet); border-bottom: 1px solid var(--grid); font: 600 11px var(--f-num); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
.seg { display: flex; flex-wrap: wrap; border-left: 1px solid var(--grid); padding: 6px; gap: 4px; align-content: center; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { padding: 4px 8px; font-size: 13px; border: 1px solid var(--grid-2); border-radius: var(--r); cursor: pointer; color: var(--ink-2); background: var(--paper); line-height: 1.3; }
.seg input:checked + label { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); font-weight: 500; }
.seg input:focus-visible + label { outline: 2px solid var(--focus); outline-offset: 1px; }
.irow.wide { grid-template-columns: 34px minmax(0, 1fr); }
.irow.wide > .lab { grid-column: 2; }
.irow.wide > .seg, .irow.wide > .grid-in { grid-column: 2; border-left: 0; }
@media (max-width: 460px) { .irow { grid-template-columns: 30px minmax(0, 1fr) minmax(0, 136px); } }
.grid-in { width: 100%; border-collapse: collapse; }
.grid-in th { font: 500 12px var(--f-ui); color: var(--ink-3); text-align: left; padding: 6px 10px; border-top: 1px solid var(--grid); background: var(--sheet); }
.grid-in td { border-top: 1px solid var(--grid); padding: 0; }
.grid-in td + td { border-left: 1px solid var(--grid); }
.grid-in td.rl { padding: 6px 10px; font-size: 14px; white-space: nowrap; }
.grid-in input { width: 100%; border: 0; background: transparent; color: var(--ink); font: 14px var(--f-num); padding: 8px 10px; text-align: right; }
.grid-in input:focus { outline: 2px solid var(--sel-line); outline-offset: -2px; background: var(--sel); }

.out { display: grid; gap: 12px; min-width: 0; }
.fx { display: grid; grid-template-columns: 44px 30px minmax(0, 1fr); align-items: stretch; border-bottom: 1px solid var(--grid-2); background: var(--paper); font: 13px var(--f-num); min-height: 36px; }
.fx span { padding: 8px 8px; }
.fx .ref { background: var(--head); border-right: 1px solid var(--grid-2); text-align: center; color: var(--ink-2); }
.fx .ico { font-style: italic; color: var(--ink-3); border-right: 1px solid var(--grid); text-align: center; font-family: Georgia, serif; }
.fx #fx-text { color: var(--ink); overflow-wrap: anywhere; }
table.res { width: 100%; border-collapse: collapse; }
table.res th { width: 34px; background: var(--head); border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); font: 11px var(--f-num); color: var(--ink-3); font-weight: 400; }
table.res td { border-bottom: 1px solid var(--grid); padding: 9px 12px; }
table.res td.lbl { color: var(--ink-2); font-size: 14px; }
table.res td.val { text-align: right; font: 15px var(--f-num); font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--ink); }
table.res tr { cursor: pointer; }
table.res tr:hover td { background: var(--sheet); }
table.res tr.key td.lbl { color: var(--ink); font-weight: 500; }
table.res tr.key td.val { font-size: 19px; font-weight: 600; }
table.res tr.sel td { background: var(--sel); }
table.res tr.sel td.val { box-shadow: inset 0 0 0 2px var(--sel-line); }
table.res tr:focus-visible { outline: 2px solid var(--focus); outline-offset: -2px; }
.verdict { padding: 12px 14px; border-left: 3px solid var(--accent); background: var(--accent-soft); color: var(--ink); font-size: 15px; }
.warn { padding: 10px 14px; border-left: 3px solid var(--warn-line); background: var(--warn-bg); font-size: 14px; display: grid; gap: 4px; }
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; }
.toolbar .note { font-size: 12px; color: var(--ink-3); align-self: center; }

.panel { margin-top: 20px; }
.panel .sheet-head { text-transform: none; letter-spacing: 0; font: 600 14px var(--f-ui); color: var(--ink); }
.panel .sheet-head .acts { display: flex; gap: 6px; flex-wrap: wrap; }
.panel-body { padding: 12px; overflow-x: auto; }
.chart-box { padding: 12px 12px 6px; }
.legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.legend i, .tip i { display: inline-block; width: 10px; height: 10px; margin-right: 6px; border-radius: 2px; vertical-align: -1px; }
.chart-wrap { position: relative; }
.chart-wrap svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart-wrap .grid { stroke: var(--grid); stroke-width: 1; }
.chart-wrap .zero { stroke: var(--grid-2); stroke-width: 1.25; }
.chart-wrap .tick { fill: var(--ink-3); font: 11px var(--f-num); }
.chart-wrap .guide { stroke: var(--ink-3); stroke-dasharray: 3 3; }
.tip { position: absolute; top: 4px; background: var(--paper); border: 1px solid var(--grid-2); box-shadow: 0 6px 18px rgba(0,0,0,.12); padding: 7px 10px; font-size: 12px; pointer-events: none; min-width: 150px; }
.tip b { display: block; font-weight: 600; margin-bottom: 2px; }
.tip div { display: flex; align-items: center; gap: 2px; }
.tip span { margin-left: auto; padding-left: 12px; font-family: var(--f-num); }
table.data { width: 100%; border-collapse: collapse; font-size: 14px; }
table.data th { text-align: right; background: var(--head); font: 600 12px var(--f-ui); color: var(--ink-2); padding: 7px 10px; border: 1px solid var(--grid); white-space: nowrap; }
table.data th:first-child { text-align: left; }
table.data td { border: 1px solid var(--grid); padding: 6px 10px; }
table.data td.n { text-align: right; font-family: var(--f-num); font-variant-numeric: tabular-nums; white-space: nowrap; }
table.data td.t { text-align: left; }
table.data td.act { white-space: nowrap; text-align: right; }
table.data tr.tot td { font-weight: 600; background: var(--sheet); }
table.data tr.cur td { background: var(--sel); }
table.data .pos { color: var(--pos); } table.data .neg { color: var(--neg); }
.scen-form { display: flex; gap: 8px; flex-wrap: wrap; padding: 12px 12px 0; }
.scen-form input { flex: 1 1 200px; font: 14px var(--f-ui); padding: 7px 10px; border: 1px solid var(--grid-2); background: var(--paper); color: var(--ink); border-radius: var(--r); }
.panel .muted { padding-top: 8px; font-size: 13px; }

/* ---------- article + rail ---------- */
.content { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; margin-top: 44px; padding-top: 32px; border-top: 1px solid var(--grid-2); }
@media (max-width: 900px) { .content { grid-template-columns: minmax(0, 1fr); } }
.prose { max-width: 68ch; display: grid; gap: 14px; align-content: start; }
.prose h2 { margin-top: 14px; }
.prose ul, .prose ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
.prose .formula { font: 14px/1.7 var(--f-num); background: var(--paper); border: 1px solid var(--grid-2); border-left: 3px solid var(--accent); padding: 10px 14px; overflow-x: auto; white-space: pre; }
.faq details { border-bottom: 1px solid var(--grid); padding: 10px 0; }
.faq summary { cursor: pointer; font-weight: 500; }
.faq details p { margin-top: 8px; color: var(--ink-2); }
.rail { display: grid; gap: 16px; align-content: start; }
.rail .sheet { padding: 0; }
.rail .box { padding: 12px 14px; display: grid; gap: 10px; font-size: 14px; }
.rail ul { list-style: none; margin: 0; padding: 0; }
.rail li a { display: block; padding: 7px 14px; border-bottom: 1px solid var(--grid); text-decoration: none; color: var(--ink); font-size: 14px; }
.rail li:last-child a { border-bottom: 0; }
.rail li a:hover { background: var(--sel); }
.price { font: 600 20px var(--f-num); }

/* ---------- forms ---------- */
.form { display: grid; gap: 10px; }
.form label { display: grid; gap: 4px; font-size: 13px; color: var(--ink-2); }
.form input, .form select, .form textarea { font: 14px var(--f-ui); padding: 8px 10px; border: 1px solid var(--grid-2); background: var(--paper); color: var(--ink); border-radius: var(--r); width: 100%; }
.form textarea { min-height: 96px; resize: vertical; }
.form .two { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 520px) { .form .two { grid-template-columns: 1fr; } }
.form-result { font-size: 14px; display: grid; gap: 8px; }
.form-result.ok { color: var(--pos); }
.form-result.err { color: var(--neg); }
.form-result pre { white-space: pre-wrap; font: 12px var(--f-num); background: var(--sheet); border: 1px solid var(--grid); padding: 8px; margin: 0; }
.form .fine { font-size: 12px; color: var(--ink-3); }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 470px); gap: 40px; align-items: center; padding-block: 44px 36px; }
@media (max-width: 900px) { .hero { grid-template-columns: minmax(0, 1fr); padding-block: 26px; gap: 24px; } }
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); }
.hero .lede { font-size: 17px; color: var(--ink-2); max-width: 52ch; margin-top: 14px; }
.hero .ctas { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.hero .facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 22px; font: 13px var(--f-num); color: var(--ink-3); }
.mini .irow { grid-template-columns: 34px minmax(0, 1fr) minmax(0, 190px); }
.mini .out-row td.val { font-size: 15px; }
.section { padding-block: 34px; border-top: 1px solid var(--grid-2); }
.section > .wrap > header { display: flex; justify-content: space-between; align-items: end; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.section > .wrap > header p { color: var(--ink-2); max-width: 60ch; margin-top: 6px; }
.three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--grid-2); background: var(--paper); }
.three > div { padding: 18px; border-right: 1px solid var(--grid); display: grid; gap: 8px; align-content: start; }
.three > div:last-child { border-right: 0; }
.three .tag { font: 12px var(--f-num); color: var(--ink-3); }
.three p { color: var(--ink-2); font-size: 14px; }
@media (max-width: 820px) { .three { grid-template-columns: 1fr; } .three > div { border-right: 0; border-bottom: 1px solid var(--grid); } .three > div:last-child { border-bottom: 0; } }

/* ---------- calculator index list (sheet rows) ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.filters input { flex: 1 1 260px; font: 14px var(--f-ui); padding: 8px 10px; border: 1px solid var(--grid-2); background: var(--paper); color: var(--ink); border-radius: var(--r); }
.chip { font: 13px var(--f-ui); padding: 6px 10px; border: 1px solid var(--grid-2); background: var(--paper); color: var(--ink-2); border-radius: var(--r); cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); }
.count { font: 12px var(--f-num); color: var(--ink-3); margin-left: auto; }
.list { border: 1px solid var(--grid-2); background: var(--paper); }
.list-head, .calc-row { display: grid; grid-template-columns: 44px minmax(0, 1.1fr) minmax(0, 1.6fr) 150px; }
.list-head { background: var(--head); border-bottom: 1px solid var(--grid-2); font: 600 12px var(--f-ui); color: var(--ink-2); }
.list-head span, .calc-row > * { padding: 9px 12px; border-right: 1px solid var(--grid); }
.list-head span:last-child, .calc-row > *:last-child { border-right: 0; }
.calc-row { border-bottom: 1px solid var(--grid); text-decoration: none; color: var(--ink); }
.calc-row:last-child { border-bottom: 0; }
.calc-row:hover { background: var(--sel); color: var(--ink); }
.calc-row .rn { font: 12px var(--f-num); color: var(--ink-3); background: var(--head); text-align: center; }
.calc-row .nm { font-weight: 500; }
.calc-row .ds { color: var(--ink-2); font-size: 14px; }
.calc-row .ct { font-size: 13px; color: var(--ink-3); }
@media (max-width: 760px) {
  .list-head { display: none; }
  .calc-row { grid-template-columns: 36px minmax(0, 1fr); }
  .calc-row .rn { grid-row: span 3; }
  .calc-row > * { border-right: 0; padding: 4px 12px; }
  .calc-row .nm { padding-top: 10px; } .calc-row .ct { padding-bottom: 10px; }
}
.recent { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 14px; font-size: 13px; color: var(--ink-3); }
.recent a { font-size: 13px; padding: 4px 8px; border: 1px solid var(--grid-2); background: var(--paper); border-radius: var(--r); text-decoration: none; color: var(--ink); }

/* ---------- store ---------- */
.products { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.product { background: var(--paper); border: 1px solid var(--grid-2); display: grid; grid-template-rows: auto 1fr; text-decoration: none; color: var(--ink); }
.product:hover { border-color: var(--accent); color: var(--ink); }
.product .body { padding: 14px; display: grid; gap: 6px; align-content: start; }
.product .body p { font-size: 14px; color: var(--ink-2); }
.product .meta { display: flex; justify-content: space-between; align-items: baseline; margin-top: 6px; }
.product .who { font-size: 12px; color: var(--ink-3); }
.status { font: 11px var(--f-num); text-transform: uppercase; letter-spacing: .06em; padding: 2px 6px; border-radius: 2px; background: var(--head); color: var(--ink-2); }
.status.live { background: var(--accent-soft); color: var(--accent-ink); }
.mock { font: 11px var(--f-num); border-bottom: 1px solid var(--grid-2); background: var(--sheet); overflow: hidden; }
.mock table { width: 100%; border-collapse: collapse; }
.mock td, .mock th { border: 1px solid var(--grid); padding: 3px 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.mock th { background: var(--head); color: var(--ink-3); font-weight: 400; text-align: center; }
.mock td { background: var(--paper); color: var(--ink-2); }
.mock td.n { text-align: right; }
.mock td.in { color: var(--s3); }
.mock td.h { font-weight: 600; color: var(--ink); background: var(--accent-soft); }
.mock .tabs { display: flex; gap: 2px; padding: 4px 6px 0; background: var(--head); }
.mock .tabs span { padding: 3px 8px; background: var(--sheet); border: 1px solid var(--grid); border-bottom: 0; color: var(--ink-3); }
.mock .tabs span:first-child { background: var(--paper); color: var(--accent-ink); font-weight: 600; }
.pp { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .pp { grid-template-columns: minmax(0, 1fr); } }
.buybox { position: sticky; top: 72px; }
.buybox .box { padding: 16px; display: grid; gap: 12px; }
.specs { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: 13px; }
.specs dt { color: var(--ink-3); }
.specs dd { margin: 0; }

/* ---------- MIS ---------- */
.tiers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--grid-2); background: var(--paper); }
.tiers > div { padding: 18px; border-right: 1px solid var(--grid); display: grid; gap: 10px; align-content: start; }
.tiers > div:last-child { border-right: 0; }
.tiers .feat { background: var(--accent-soft); }
.tiers ul { margin: 0; padding-left: 18px; font-size: 14px; color: var(--ink-2); display: grid; gap: 4px; }
.tiers .amt { font: 600 22px var(--f-num); }
.tiers .amt small { font: 13px var(--f-ui); color: var(--ink-3); font-weight: 400; }
@media (max-width: 860px) { .tiers { grid-template-columns: 1fr; } .tiers > div { border-right: 0; border-bottom: 1px solid var(--grid); } }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--grid-2); background: var(--paper); counter-reset: st; }
.steps li { padding: 16px; border-right: 1px solid var(--grid); display: grid; gap: 6px; align-content: start; counter-increment: st; font-size: 14px; color: var(--ink-2); }
.steps li::before { content: "Step " counter(st); font: 12px var(--f-num); color: var(--ink-3); }
.steps li b { color: var(--ink); font-size: 15px; }
.steps li:last-child { border-right: 0; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr 1fr; } .steps li:nth-child(2) { border-right: 0; } .steps li:nth-child(-n+2) { border-bottom: 1px solid var(--grid); } }
@media (max-width: 480px) { .steps { grid-template-columns: 1fr; } .steps li { border-right: 0; border-bottom: 1px solid var(--grid); } }
.demo { background: var(--paper); border: 1px solid var(--grid-2); }
.demo-bar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; padding: 10px 12px; background: var(--head); border-bottom: 1px solid var(--grid-2); font-size: 14px; }
.demo-bar select { font: 14px var(--f-ui); padding: 5px 8px; border: 1px solid var(--grid-2); background: var(--paper); color: var(--ink); border-radius: var(--r); }
.kpis { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-bottom: 1px solid var(--grid-2); }
.kpi { padding: 12px 14px; border-right: 1px solid var(--grid); display: grid; gap: 2px; }
.kpi:last-child { border-right: 0; }
.kpi .k { font-size: 12px; color: var(--ink-3); }
.kpi b { font: 600 20px var(--f-num); }
.d { font: 12px var(--f-num); color: var(--ink-3); }
.d.up { color: var(--pos); } .d.down { color: var(--neg); }
@media (max-width: 820px) { .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); } .kpi { border-bottom: 1px solid var(--grid); } }
.demo-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
.demo-grid > div { padding: 12px; border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); min-width: 0; }
.demo-grid > div:nth-child(2n) { border-right: 0; }
.demo-grid h3 { font-size: 14px; margin-bottom: 8px; font-family: var(--f-ui); }
.demo-grid .chart-box { padding: 0; }
@media (max-width: 860px) { .demo-grid { grid-template-columns: minmax(0, 1fr); } .demo-grid > div { border-right: 0; } }
.notes { margin: 0; padding-left: 18px; display: grid; gap: 6px; font-size: 14px; }
.demo .pnl { overflow-x: auto; }

/* ---------- footer ---------- */
.foot { margin-top: 56px; border-top: 1px solid var(--grid-2); background: var(--paper); padding-block: 28px calc(28px + env(safe-area-inset-bottom, 0px)); font-size: 14px; }
.foot .cols { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 24px; }
.foot h4 { margin: 0 0 8px; font: 600 12px var(--f-num); text-transform: uppercase; letter-spacing: .06em; color: var(--ink-3); }
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.foot a { color: var(--ink-2); text-decoration: none; }
.foot a:hover { color: var(--accent-ink); text-decoration: underline; }
.foot .small { font-size: 12px; color: var(--ink-3); margin-top: 18px; max-width: 90ch; }
.theme { display: inline-flex; border: 1px solid var(--grid-2); border-radius: var(--r); overflow: hidden; margin-top: 10px; }
.theme button { font: 12px var(--f-ui); padding: 4px 9px; border: 0; background: var(--paper); color: var(--ink-2); cursor: pointer; }
.theme button + button { border-left: 1px solid var(--grid-2); }
.theme button[aria-pressed="true"] { background: var(--accent-soft); color: var(--accent-ink); }
@media (max-width: 760px) { .foot .cols { grid-template-columns: 1fr 1fr; } .foot .cols > div:first-child { grid-column: 1 / -1; } }

.toast { position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom, 0px)); transform: translate(-50%, 20px); background: var(--ink); color: var(--paper); padding: 9px 14px; border-radius: var(--r); font-size: 14px; opacity: 0; transition: .18s; pointer-events: none; z-index: 60; max-width: calc(100% - 32px); }
.toast.on { opacity: 1; transform: translate(-50%, 0); }
.copy-fallback { position: fixed; left: 16px; bottom: 16px; width: calc(100% - 32px); height: 80px; z-index: 70; }
.callout { background: var(--paper); border: 1px solid var(--grid-2); padding: 18px; display: grid; gap: 10px; }
.legal { max-width: 74ch; display: grid; gap: 14px; }
.legal h2 { font-size: 18px; margin-top: 10px; }
.legal ul { margin: 0; padding-left: 20px; display: grid; gap: 4px; }
.posts { border: 1px solid var(--grid-2); background: var(--paper); }
.posts a { display: grid; gap: 4px; padding: 16px; border-bottom: 1px solid var(--grid); text-decoration: none; color: var(--ink); }
.posts a:last-child { border-bottom: 0; }
.posts a:hover { background: var(--sel); }
.posts small { color: var(--ink-3); font: 12px var(--f-num); }
.posts span { color: var(--ink-2); font-size: 14px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }
@media print {
  .top, .foot, .toolbar, #kq-scen, .rail, .content .lead-box, body::before { display: none !important; }
  body { background: #fff; color: #000; }
  .calc-grid { grid-template-columns: 1fr 1fr; }
}
.irow.wide::before { grid-row: span 2; }
.irow.wide > .lab { padding-bottom: 2px; }
.irow.wide > .seg { padding: 0 10px 10px; }
.irow.wide > .grid-in { margin-top: 2px; }