/* ============================================================
   PAISARITHM — design system
   Identity: the Indian household ledger / bank passbook.
   Numbers are stamped, verified, right-aligned and exact —
   never a generic "big gradient number" finance-app look.
   ============================================================ */

:root {
  /* --- color --- */
  --ink: #1B2A4A;            /* deep indigo ledger ink — headings, primary text */
  --ink-soft: #3B4A6B;       /* secondary headings */
  --paper: #F1EEE3;          /* parchment page background */
  --paper-dim: #E8E4D5;      /* recessed paper (alt sections) */
  --surface: #FFFFFF;        /* raised card surface, like a clean ledger sheet */
  --seal: #B5482D;           /* terracotta stamp-ink — used sparingly: CTAs, the seal */
  --seal-dark: #8F3720;
  --ledger-green: #2F5233;   /* rupee-note green — positive figures, growth */
  --ledger-green-soft: #E7EEE3;
  --line: #D8D2C0;           /* hairline rule, like ledger grid lines */
  --line-strong: #C2BAA1;
  --muted: #6B6657;          /* secondary / caption text */
  --danger: #9B3B2C;

  /* --- type --- */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* --- layout --- */
  --maxw: 1120px;
  --radius: 3px;
  --shadow-card: 0 1px 0 var(--line-strong), 0 8px 24px -16px rgba(27,42,74,0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; color: var(--ink-soft); }

a { color: var(--seal); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--seal);
  outline-offset: 2px;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  display: block;
  margin-bottom: 0.6em;
}

/* ---------------- header / nav ---------------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--ink);
}

.brand .mark {
  width: 28px;
  height: 28px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.brand .tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 400;
}

.main-nav { display: flex; gap: 28px; align-items: center; }
.main-nav a { color: var(--ink-soft); font-size: 0.92rem; font-weight: 500; }
.main-nav a:hover { color: var(--seal); text-decoration: none; }

.nav-toggle { display: none; }

@media (max-width: 720px) {
  .main-nav { display: none; }
}

/* ---------------- footer ---------------- */

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 80px;
  padding: 40px 0 32px;
  background: var(--paper-dim);
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}

.site-footer .foot-links { display: flex; gap: 20px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); font-size: 0.88rem; }
.site-footer .foot-note { font-size: 0.82rem; color: var(--muted); max-width: 520px; }

/* ---------------- hero ---------------- */

.hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}

.hero .lede {
  font-size: 1.1rem;
  color: var(--ink-soft);
  max-width: 540px;
}

.hero-stamp-row {
  display: flex;
  gap: 28px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.hero-figure {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--ink);
  font-weight: 600;
}

.hero-figure .label {
  display: block;
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
}

/* ---------------- ledger tabs / category index ---------------- */

.ledger-section { padding: 56px 0; }
.ledger-section + .ledger-section { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
  flex-wrap: wrap;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}

.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.tool-card:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  text-decoration: none;
}

.tool-card .t-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink);
}

.tool-card .t-desc { font-size: 0.85rem; color: var(--muted); margin: 0; }

.tool-card .t-arrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--seal);
  margin-top: auto;
}

.category-band {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.category-band .count {
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
  color: var(--ink-soft);
}

.coming-soon-strip {
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  font-size: 0.86rem;
  color: var(--muted);
  background: var(--paper-dim);
}

/* ---------------- breadcrumb ---------------- */

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted);
  padding: 18px 0 0;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--seal); }

/* ---------------- calculator layout ---------------- */

.calc-head { padding: 18px 0 32px; max-width: 720px; }
.calc-head p { font-size: 1.02rem; }

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 24px;
  align-items: start;
  padding-bottom: 56px;
}

@media (max-width: 860px) {
  .calc-grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 28px;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.field { margin-bottom: 20px; }
.field:last-child { margin-bottom: 0; }

.field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.field label .val {
  font-family: var(--font-mono);
  color: var(--ink);
  font-weight: 600;
}

.field input[type="number"],
.field input[type="text"],
.field select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1rem;
  background: var(--paper);
  color: var(--ink);
}

.field input:focus, .field select:focus {
  border-color: var(--ink);
  background: var(--surface);
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--seal);
  margin-top: 4px;
}

.radio-row { display: flex; gap: 10px; flex-wrap: wrap; }
.radio-row label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.84rem;
  color: var(--ink-soft);
  cursor: pointer;
  font-weight: 500;
}
.radio-row input { accent-color: var(--seal); }

/* ---- result panel ---- */

.result-panel { background: var(--ink); color: var(--paper); }
.result-panel .panel-title { color: rgba(241,238,227,0.6); border-color: rgba(241,238,227,0.18); }

.result-stamp {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 24px;
}

.seal-badge {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px dashed var(--seal);
  display: flex;
  align-items: center;
  justify-content: center;
  transform: rotate(-8deg);
  color: var(--seal);
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
}

.result-headline .r-value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 3.4vw, 2.5rem);
  font-weight: 600;
  color: var(--paper);
  display: block;
}

.result-headline .r-label {
  font-size: 0.84rem;
  color: rgba(241,238,227,0.65);
  margin-top: 2px;
}

.result-rows { border-top: 1px solid rgba(241,238,227,0.18); padding-top: 18px; }

.r-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(241,238,227,0.1);
  font-size: 0.92rem;
}
.r-row:last-child { border-bottom: none; }
.r-row .r-key { color: rgba(241,238,227,0.7); }
.r-row .r-val { font-family: var(--font-mono); font-weight: 600; }

.bar-split {
  display: flex;
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  margin: 18px 0 10px;
  background: rgba(241,238,227,0.12);
}
.bar-split .seg-a { background: var(--seal); }
.bar-split .seg-b { background: #6E7C9A; }

.legend-row { display: flex; gap: 18px; font-size: 0.78rem; color: rgba(241,238,227,0.7); flex-wrap: wrap; }
.legend-row .dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }

/* ---- insight box ---- */

.insight-box {
  margin-top: 20px;
  padding: 16px 18px;
  background: rgba(241,238,227,0.08);
  border: 1px solid rgba(241,238,227,0.18);
  border-radius: var(--radius);
}
.insight-box .i-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--seal);
  display: block;
  margin-bottom: 8px;
}
.insight-box p { color: rgba(241,238,227,0.88); font-size: 0.9rem; margin: 0; }

/* ---- breakdown table ---- */

.breakdown-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: 0.88rem;
}
.breakdown-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--line-strong);
}
.breakdown-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}
.breakdown-table td.num, .breakdown-table th.num { text-align: right; }
.breakdown-table tr:last-child td { border-bottom: none; font-weight: 600; color: var(--ink); }

/* ---------------- buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--seal);
  color: #fff;
  border: none;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
}
.btn:hover { background: var(--seal-dark); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.btn-ghost:hover { border-color: var(--ink); background: transparent; }

/* ---------------- explainer / content ---------------- */

.explainer {
  margin-top: 8px;
  padding-top: 0;
}
.explainer h2 { margin-top: 0; }
.explainer .formula {
  font-family: var(--font-mono);
  background: var(--paper-dim);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-size: 0.9rem;
  overflow-x: auto;
  color: var(--ink);
}

.disclaimer-strip {
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  margin-top: 48px;
  padding-top: 18px;
}

/* ---------------- simple content pages ---------------- */

.prose { max-width: 720px; padding: 48px 0 64px; }
.prose h2 { margin-top: 1.6em; }
.prose ul { color: var(--ink-soft); }

/* ═══════════════════════════════════════════════════════════════
   MOBILE NAV — hamburger toggle
   ═══════════════════════════════════════════════════════════════ */

.nav-toggle {
  display: none;
  background: transparent;
  border: .5px solid rgba(241,238,227,.28);
  border-radius: 5px;
  color: var(--ink);
  font-size: 1.15rem;
  line-height: 1;
  padding: 6px 11px;
  cursor: pointer;
  transition: background .15s;
  flex-shrink: 0;
}
.nav-toggle:hover { background: rgba(241,238,227,.1); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; align-items: center; }

  .site-header .container {
    position: relative;
    flex-wrap: wrap;
    gap: 0;
  }

  .main-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    order: 3;
    border-top: .5px solid var(--line);
    padding: 6px 0 10px;
    gap: 0;
  }
  .main-nav.open { display: flex; }

  .main-nav a {
    padding: 11px 0;
    border-bottom: .5px solid rgba(241,238,227,.07);
    font-size: .92rem;
  }
  .main-nav a:last-child { border-bottom: none; }
}

/* ═══════════════════════════════════════════════════════════════
   SEARCH BAR
   ═══════════════════════════════════════════════════════════════ */

.search-section {
  background: var(--paper-dim);
  border-bottom: .5px solid var(--line);
  padding: 14px 0;
  position: sticky;
  top: 56px;
  z-index: 90;
}
.search-inner {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 560px;
  margin: 0 auto;
  background: var(--paper);
  border: .5px solid var(--line-strong);
  border-radius: 6px;
  padding: 0 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,.18);
}
.search-inner input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-body);
  font-size: .95rem;
  color: var(--ink);
  padding: 11px 0;
}
.search-inner input::placeholder { color: var(--muted); }
.search-icon { color: var(--muted); font-size: 1rem; flex-shrink: 0; }
.search-clear {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 1rem;
  cursor: pointer;
  padding: 4px;
  display: none;
  line-height: 1;
}
.search-clear.visible { display: flex; align-items: center; }
.search-count {
  font-size: .78rem;
  color: var(--muted);
  white-space: nowrap;
  font-family: var(--font-mono);
  padding: 0 2px;
}

/* hide non-matching cards */
.tool-card.sr-hide { display: none !important; }

/* empty-section notice */
.sr-empty {
  display: none;
  font-size: .84rem;
  color: var(--muted);
  padding: .25rem 0 1.25rem;
  font-style: italic;
}
.sr-empty.visible { display: block; }

/* no-results global banner */
.sr-no-results {
  display: none;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}
.sr-no-results.visible { display: block; }
.sr-no-results strong { color: var(--ink); font-size: 1.05rem; display: block; margin-bottom: .4rem; }

@media (max-width: 768px) {
  .search-section { top: auto; position: relative; padding: 12px 0; }
  .search-inner { max-width: 100%; }
}