/* Hisaab — the digital khata. Paper, ink, one saffron stamp.
   No external fonts or CDNs; serif display comes from the system. */

:root {
  --bg: #f6f1e6;
  --surface: #fffdf6;
  --surface-2: #f1ebdc;
  --text: #231f18;
  --muted: #6e6555;
  --border: #d9cfb8;
  --ink: #231f18;
  --accent: #b45309;          /* burnt saffron — links, highlights */
  --accent-strong: #8a3e06;
  --accent-soft: #f7e8d2;
  --green: #1e6b47;           /* money-positive */
  --positive: #1e6b47;
  --negative: #b3261e;
  --warn-bg: #fbf0d3;
  --warn-border: #d9b45c;
  --warn-text: #5f4a08;
  --radius: 6px;
  --shadow: 3px 3px 0 var(--border);
  --shadow-ink: 3px 3px 0 var(--ink);
  --maxw: 960px;
  --serif: ui-serif, Georgia, 'Iowan Old Style', 'Palatino', 'Times New Roman', serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16130d;
    --surface: #201c13;
    --surface-2: #1a1710;
    --text: #ede5d3;
    --muted: #a3987f;
    --border: #453d2b;
    --ink: #0c0a06;
    --accent: #e59f4c;
    --accent-strong: #f0b56e;
    --accent-soft: #33270f;
    --green: #67b98d;
    --positive: #67b98d;
    --negative: #ef8078;
    --warn-bg: #2c2410;
    --warn-border: #6b5518;
    --warn-text: #ecd28a;
    --shadow: 3px 3px 0 rgba(0, 0, 0, 0.55);
    --shadow-ink: 3px 3px 0 rgba(0, 0, 0, 0.55);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent-strong); text-decoration-thickness: 2px; }

/* Header */
.site-header {
  border-bottom: 2px solid var(--text);
  background: var(--surface);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding-top: 13px; padding-bottom: 13px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.brand img { width: 32px; height: 32px; }
.brand b {
  font-family: var(--serif); font-size: 1.35rem; font-weight: 700;
  letter-spacing: -0.01em;
}
.brand b::after {
  content: " हिसाब"; font-family: var(--serif); font-weight: 400;
  font-size: 0.82em; color: var(--muted);
}
.brand span { color: var(--muted); font-size: 0.8rem; }
.brand span span { display: none; } /* hide the old tagline text, the wordmark carries it */
.nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 0.92rem; }
.nav a { text-decoration: none; color: var(--text); border-bottom: 2px solid transparent; padding-bottom: 1px; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--accent); color: var(--text); }

/* Main */
main { padding: 30px 0 8px; }
h1 {
  font-family: var(--serif);
  font-size: clamp(1.85rem, 4.5vw, 2.5rem);
  line-height: 1.12; letter-spacing: -0.01em; margin: 0 0 12px;
}
h2 { font-family: var(--serif); font-size: 1.4rem; margin: 34px 0 10px; line-height: 1.2; }
h3 { font-family: var(--serif); font-size: 1.08rem; margin: 20px 0 6px; }
.lead { color: var(--muted); font-size: 1.05rem; margin: 0 0 10px; max-width: 62ch; }

.fy-pill {
  display: inline-block; background: var(--accent-soft); color: var(--accent-strong);
  border: 1.5px solid var(--accent); border-radius: 3px; padding: 2px 10px;
  font-size: 0.76rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 16px; transform: rotate(-1.2deg);
}

.card {
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px;
}

/* Deadline / notice banner */
.banner {
  border: 1.5px solid var(--warn-border); background: var(--warn-bg); color: var(--warn-text);
  border-radius: var(--radius); padding: 9px 14px; font-size: 0.9rem; margin: 0 0 18px;
}
.banner strong { font-variant-numeric: tabular-nums; }

/* Calculator layout */
.calc { display: grid; gap: 20px; grid-template-columns: 1fr; margin-top: 10px; }
@media (min-width: 780px) { .calc { grid-template-columns: 1.05fr 0.95fr; align-items: start; } }

.field { margin-bottom: 14px; }
.field > label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 5px; }
.field .hint { color: var(--muted); font-size: 0.82rem; margin-top: 4px; }
.input, select {
  width: 100%; padding: 10px 12px; font-size: 1rem; color: var(--text);
  background: var(--surface); border: 1.5px solid var(--border);
  border-radius: 5px; font-family: inherit;
  font-variant-numeric: tabular-nums;
}
.input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.input-money { position: relative; }
.input-money input { padding-left: 26px; }
.input-money::before {
  content: "₹"; position: absolute; left: 11px; top: 50%; transform: translateY(-50%);
  color: var(--muted); pointer-events: none;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 460px) { .grid-2 { grid-template-columns: 1fr; } }

fieldset { border: 0; margin: 0 0 14px; padding: 0; }
fieldset legend { font-weight: 600; font-size: 0.92rem; margin-bottom: 6px; padding: 0; }
.segmented { display: inline-flex; border: 1.5px solid var(--text); border-radius: 5px; overflow: hidden; flex-wrap: wrap; }
.segmented label {
  padding: 8px 14px; cursor: pointer; font-size: 0.9rem; background: var(--surface);
  border-right: 1.5px solid var(--text);
}
.segmented label:last-child { border-right: 0; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented input:checked + span { color: var(--surface); font-weight: 600; }
.segmented label:has(input:checked) { background: var(--text); }
.segmented label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: -2px; }

/* Quick preset chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 4px; }
.chip {
  font: inherit; font-size: 0.85rem; font-weight: 600; cursor: pointer;
  color: var(--text); background: var(--surface);
  border: 1.5px solid var(--text); border-radius: 999px; padding: 4px 13px;
  box-shadow: 2px 2px 0 var(--border);
}
.chip:hover { background: var(--accent-soft); }
.chip:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--border); }

/* Result panel — the ledger */
.result { background: var(--surface-2); }
.result .headline {
  font-size: 0.78rem; color: var(--muted); margin: 0;
  text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700;
}
.result .big {
  font-size: 2.1rem; font-weight: 700; letter-spacing: -0.02em; margin: 2px 0 2px;
  font-variant-numeric: tabular-nums;
}
.result .sub { color: var(--muted); font-size: 0.9rem; margin: 0 0 12px; }

.verdict {
  border: 1.5px solid var(--green); background: color-mix(in srgb, var(--green) 9%, var(--surface));
  color: var(--text); border-radius: 5px; padding: 8px 12px;
  font-size: 0.92rem; margin: 10px 0 12px;
}
.verdict b { color: var(--green); font-variant-numeric: tabular-nums; }

table.breakdown { width: 100%; border-collapse: collapse; font-size: 0.92rem; margin-top: 8px; }
table.breakdown th, table.breakdown td { text-align: left; padding: 7px 0; border-bottom: 1px dashed var(--border); }
table.breakdown td.num, table.breakdown th.num { text-align: right; font-variant-numeric: tabular-nums; }
table.breakdown tr:last-child td { border-bottom: 0; }
table.breakdown tr.total td {
  font-weight: 700; border-top: 3px double var(--text); border-bottom: 0;
  font-variant-numeric: tabular-nums;
}
.pos { color: var(--positive); }
.neg { color: var(--negative); }

details.math { margin-top: 14px; border: 1.5px solid var(--border); border-radius: 5px; background: var(--surface); }
details.math > summary { cursor: pointer; padding: 10px 14px; font-weight: 600; font-size: 0.92rem; }
details.math > summary::marker { color: var(--accent); }
details.math .math-body { padding: 0 14px 14px; font-size: 0.9rem; }
details.math ol { margin: 0; padding-left: 20px; }
details.math li { margin: 5px 0; }
code, .mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.88em; }

/* Share row */
.share-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.btn {
  font: inherit; font-size: 0.88rem; font-weight: 600; cursor: pointer;
  display: inline-block; text-decoration: none; text-align: center;
  color: var(--text); background: var(--surface);
  border: 1.5px solid var(--text); border-radius: 5px; padding: 7px 14px;
  box-shadow: 2px 2px 0 var(--ink);
}
.btn:hover { background: var(--accent-soft); color: var(--text); }
.btn:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--ink); }

/* Callouts */
.callout { border: 1.5px solid var(--border); border-radius: 5px; padding: 12px 14px; margin: 14px 0; font-size: 0.92rem; background: var(--surface); }
.callout-warn { background: var(--warn-bg); border-color: var(--warn-border); color: var(--warn-text); }
.callout-warn a { color: inherit; }

/* Prose */
.prose p, .prose li { color: var(--text); }
.prose { max-width: 68ch; }
.prose ul { padding-left: 20px; }

/* Trust strip */
.trust {
  display: flex; gap: 8px 22px; flex-wrap: wrap; align-items: center;
  margin: 18px 0 6px; padding: 12px 0; font-size: 0.88rem; color: var(--muted);
  border-top: 1.5px solid var(--border); border-bottom: 1.5px solid var(--border);
}
.trust b { color: var(--text); font-weight: 600; }
.trust span::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* Homepage tiles */
.tiles { display: grid; gap: 16px; grid-template-columns: 1fr; margin: 20px 0; }
@media (min-width: 620px) { .tiles { grid-template-columns: 1fr 1fr; } }
.tile { display: block; text-decoration: none; color: inherit; }
.tile.card:hover { border-color: var(--text); box-shadow: var(--shadow-ink); transform: translate(-1px, -1px); transition: all 0.1s; }
.tile h3 { margin: 0 0 4px; color: var(--text); }
.tile h3::after { content: " ↗"; color: var(--accent); font-family: var(--sans); font-size: 0.85em; }
.tile p { margin: 0; color: var(--muted); font-size: 0.9rem; }
.tile .kicker {
  display: block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 6px; font-family: var(--sans);
}
@media (min-width: 620px) { .tile-featured { grid-column: span 2; } }
.tile-featured h3 { font-size: 1.35rem; }

/* FAQ */
.faq details { border-bottom: 1px dashed var(--border); padding: 10px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 0.95rem; }
.faq summary::marker { color: var(--accent); }
.faq p { margin: 8px 0 2px; color: var(--muted); font-size: 0.92rem; max-width: 68ch; }

/* The signed note */
.sig { font-family: var(--serif); font-style: italic; color: var(--muted); }

/* Disclaimer + footer */
.disclaimer { font-size: 0.82rem; color: var(--muted); border-top: 1.5px solid var(--border); margin-top: 28px; padding-top: 14px; }
.site-footer { border-top: 2px solid var(--text); margin-top: 32px; background: var(--surface); }
.site-footer .wrap { padding-top: 20px; padding-bottom: 28px; font-size: 0.86rem; color: var(--muted); }
.site-footer .links { display: flex; gap: 6px 16px; flex-wrap: wrap; margin-bottom: 10px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); text-decoration: underline; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }