/* ==========================================================================
   Finpockett — Design System
   A financial-calculator directory styled after the Indian bank passbook:
   ruled ledger paper, a red accounting margin line, dotted-leader entries,
   and monospace figures throughout so every number lines up like a printed
   statement. Type system is the IBM Plex superfamily (Serif/Sans/Mono) —
   one family spanning three roles, the way an institution's brand system
   would use it.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Serif:wght@500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Color */
  --ink: #1B2A41;
  --ink-soft: #4C5C72;
  --ink-faint: #8590A0;
  --paper: #EAEDE4;
  --paper-raised: #F7F8F3;
  --paper-deep: #DEE2D6;
  --rule: #C7CCBC;
  --rule-soft: #DBDED1;
  --margin-red: #A23B2E;
  --margin-red-soft: #E7C9C2;
  --gold: #AC7E28;
  --gold-deep: #8C6620;
  --gold-soft: #E7D6AC;
  --teal: #2C6459;
  --teal-soft: #CFE0D8;

  /* Type */
  --f-serif: 'IBM Plex Serif', Georgia, serif;
  --f-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --f-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  /* Scale */
  --radius-s: 3px;
  --radius-m: 6px;
  --shadow-card: 0 1px 2px rgba(27, 42, 65, 0.06), 0 4px 14px rgba(27, 42, 65, 0.06);
  --container: 1180px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.55;
  background-image:
    repeating-linear-gradient(var(--paper) 0px, var(--paper) 27px, var(--rule-soft) 28px);
  background-attachment: local;
}
/* Ledger ruling reads as a texture, not stripes on top of content */
body { background-image: none; }

h1, h2, h3, h4 { font-family: var(--f-serif); font-weight: 600; color: var(--ink); margin: 0 0 0.5em; line-height: 1.18; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 1.5rem + 2vw, 2.9rem); }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; color: var(--ink-soft); }
a { color: var(--teal); text-decoration-color: var(--teal-soft); text-underline-offset: 3px; }
a:hover { color: var(--margin-red); }
strong { color: var(--ink); }

/* Numerals: always mono, always tabular */
.num, .mono, input[type="number"], .amount, .stat-value, .headline-value {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

:focus-visible { outline: 2px solid var(--margin-red); outline-offset: 2px; border-radius: var(--radius-s); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.eyebrow { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold-deep); }

/* ==========================================================================
   Header / Footer
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--paper-raised);
  border-bottom: 1px solid var(--rule);
}
.site-header .bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.brand { display: flex; align-items: baseline; gap: 8px; text-decoration: none; }
.brand-mark {
  font-family: var(--f-mono); font-weight: 700; font-size: 1rem; color: var(--paper-raised);
  background: var(--ink); padding: 3px 7px; border-radius: var(--radius-s); letter-spacing: 0.02em;
}
.brand-word { font-family: var(--f-serif); font-weight: 600; font-size: 1.28rem; color: var(--ink); }
.brand:hover .brand-word { color: var(--ink); }

.header-search { position: relative; flex: 1; max-width: 360px; display: none; }
.header-search input {
  width: 100%; padding: 9px 12px 9px 32px; border: 1px solid var(--rule); border-radius: var(--radius-m);
  background: var(--paper); font-family: var(--f-sans); font-size: 0.88rem; color: var(--ink);
}
.header-search input:focus { outline: none; border-color: var(--teal); background: var(--paper-raised); }
.header-search svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 15px; height: 15px; color: var(--ink-faint); }
@media (min-width: 760px) { .header-search { display: block; } }

.nav-link { font-size: 0.92rem; font-weight: 500; color: var(--ink-soft); text-decoration: none; }
.nav-link:hover { color: var(--margin-red); }

.site-footer { border-top: 1px solid var(--rule); margin-top: 72px; padding: 44px 0 28px; background: var(--paper-raised); }
.footer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 20px; margin-bottom: 32px; }
@media (min-width: 700px) { .footer-grid { grid-template-columns: repeat(6, 1fr); } }
.footer-col h4 { font-family: var(--f-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold-deep); margin-bottom: 10px; }
.footer-col a { display: block; font-size: 0.85rem; color: var(--ink-soft); text-decoration: none; padding: 3px 0; }
.footer-col a:hover { color: var(--margin-red); }
.footer-bottom { border-top: 1px dashed var(--rule); padding-top: 20px; font-size: 0.8rem; color: var(--ink-faint); display: flex; flex-wrap: wrap; gap: 10px 20px; justify-content: space-between; }
.footer-disclaimer { max-width: 720px; }

/* ==========================================================================
   Homepage — the tool list IS the hero, styled as a passbook register
   ========================================================================== */
.hero { padding: 44px 0 8px; }
.hero-kicker { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.hero-kicker .rule-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--margin-red); }
.hero h1 { max-width: 15ch; }
.hero-sub { max-width: 52ch; font-size: 1.08rem; }

.search-row { margin: 26px 0 6px; position: relative; max-width: 480px; }
.search-row input {
  width: 100%; padding: 13px 16px 13px 40px; border: 1.5px solid var(--ink); border-radius: var(--radius-m);
  background: var(--paper-raised); font-family: var(--f-sans); font-size: 0.98rem; color: var(--ink);
}
.search-row input:focus { outline: none; box-shadow: 0 0 0 3px var(--gold-soft); }
.search-row svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); width: 17px; height: 17px; color: var(--ink-faint); }

.ledger {
  margin-top: 30px; background: var(--paper-raised); border: 1px solid var(--rule);
  border-radius: var(--radius-m); box-shadow: var(--shadow-card); overflow: hidden; position: relative;
}
.ledger::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 46px; width: 1px; background: var(--margin-red-soft);
  pointer-events: none;
}
.category-block { border-bottom: 1px solid var(--rule); }
.category-block:last-child { border-bottom: none; }
.category-head {
  display: flex; align-items: baseline; gap: 10px; padding: 16px 20px 10px 52px;
  font-family: var(--f-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint);
}
.category-head .count { color: var(--ink-faint); font-weight: 400; }
.tool-row {
  display: flex; align-items: center; gap: 14px; padding: 13px 20px 13px 52px; text-decoration: none;
  border-top: 1px dotted var(--rule); transition: background 0.12s ease;
}
.category-block .tool-row:first-of-type { border-top: none; }
.tool-row:hover { background: var(--paper); }
.tool-row:hover .tool-name { color: var(--margin-red); }
.tool-code {
  font-family: var(--f-mono); font-size: 0.72rem; font-weight: 600; color: var(--teal); background: var(--teal-soft);
  padding: 3px 6px; border-radius: var(--radius-s); min-width: 42px; text-align: center; flex-shrink: 0;
}
.tool-name { font-weight: 500; color: var(--ink); flex-shrink: 0; }
.tool-leader { flex: 1; border-bottom: 1px dotted var(--rule-soft); margin: 0 4px; height: 1px; align-self: center; display: none; }
@media (min-width: 640px) { .tool-leader { display: block; } }
.tool-desc { color: var(--ink-faint); font-size: 0.86rem; flex-shrink: 0; display: none; }
@media (min-width: 640px) { .tool-desc { display: block; } }
.tool-arrow { color: var(--ink-faint); flex-shrink: 0; font-family: var(--f-mono); }
.tool-row.is-hidden { display: none; }
.no-results { padding: 32px 52px; color: var(--ink-faint); font-style: italic; display: none; }

.strip {
  display: flex; gap: 22px; overflow-x: auto; padding: 22px 0 4px; margin-top: 8px; scrollbar-width: thin;
}
.strip-stat { flex-shrink: 0; }
.strip-stat .n { font-family: var(--f-mono); font-size: 1.5rem; font-weight: 600; color: var(--ink); }
.strip-stat .l { font-size: 0.78rem; color: var(--ink-faint); }

/* ==========================================================================
   Calculator page
   ========================================================================== */
.breadcrumb { display: flex; gap: 6px; align-items: center; font-size: 0.82rem; color: var(--ink-faint); margin: 22px 0 6px; flex-wrap: wrap; }
.breadcrumb a { color: var(--ink-faint); text-decoration: none; }
.breadcrumb a:hover { color: var(--margin-red); }

.tool-header { padding: 6px 0 8px; }
.tool-header .eyebrow { display: block; margin-bottom: 10px; }
.tool-header h1 { max-width: 22ch; }
.tool-header .lede { font-size: 1.05rem; max-width: 62ch; }

.calc-shell {
  display: grid; grid-template-columns: 1fr; gap: 18px; margin: 28px 0 12px;
}
@media (min-width: 900px) { .calc-shell { grid-template-columns: 1.05fr 0.95fr; align-items: start; } }

.panel {
  background: var(--paper-raised); border: 1px solid var(--rule); border-radius: var(--radius-m);
  box-shadow: var(--shadow-card); padding: 24px 22px; position: relative;
}
.panel.inputs-panel { border-left: 3px solid var(--margin-red); }
.panel-title { font-family: var(--f-mono); font-size: 0.74rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 18px; }

.field { margin-bottom: 20px; }
.field:last-child { margin-bottom: 0; }
.field-top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.field label { font-size: 0.9rem; font-weight: 500; color: var(--ink); }
.field-input-wrap { display: flex; align-items: center; border: 1.5px solid var(--rule); border-radius: var(--radius-m); background: var(--paper); overflow: hidden; }
.field-input-wrap:focus-within { border-color: var(--teal); }
.field-prefix, .field-suffix { padding: 0 10px; color: var(--ink-faint); font-family: var(--f-mono); font-size: 0.9rem; flex-shrink: 0; }
.field-input-wrap input[type="number"], .field-input-wrap input[type="text"], .field-input-wrap input[type="date"] {
  flex: 1; min-width: 0; border: none; background: transparent; padding: 10px 8px; font-size: 1rem; color: var(--ink);
  text-align: right;
}
.field-input-wrap input:focus { outline: none; }
.field select { width: 100%; border: 1.5px solid var(--rule); border-radius: var(--radius-m); background: var(--paper); padding: 10px 12px; font-family: var(--f-sans); font-size: 0.95rem; color: var(--ink); }
.field select:focus { outline: none; border-color: var(--teal); }

input[type="range"] {
  width: 100%; margin-top: 10px; -webkit-appearance: none; appearance: none; height: 4px;
  background: var(--rule); border-radius: 2px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 17px; height: 17px; border-radius: 50%;
  background: var(--margin-red); border: 2px solid var(--paper-raised); box-shadow: 0 0 0 1px var(--margin-red); cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 17px; height: 17px; border-radius: 50%; background: var(--margin-red); border: 2px solid var(--paper-raised);
  box-shadow: 0 0 0 1px var(--margin-red); cursor: pointer;
}

.toggle-row { display: flex; gap: 8px; flex-wrap: wrap; }
.toggle-chip {
  font-family: var(--f-mono); font-size: 0.82rem; padding: 7px 13px; border: 1.5px solid var(--rule);
  border-radius: 20px; background: var(--paper); color: var(--ink-soft); cursor: pointer; transition: all 0.12s ease;
}
.toggle-chip.active { background: var(--ink); border-color: var(--ink); color: var(--paper-raised); }
.toggle-chip:hover:not(.active) { border-color: var(--ink-soft); }

.row-add-btn, .btn-ghost {
  font-family: var(--f-sans); font-size: 0.86rem; font-weight: 500; color: var(--teal); background: none;
  border: 1.5px dashed var(--teal-soft); border-radius: var(--radius-m); padding: 9px 14px; cursor: pointer; width: 100%;
}
.row-add-btn:hover { background: var(--teal-soft); }

/* Results — the "passbook printout" */
.panel.results-panel { border-left: 3px solid var(--gold); }
.stamp {
  position: absolute; top: 18px; right: 18px; width: 58px; height: 58px; border-radius: 50%;
  border: 2px solid var(--teal); color: var(--teal); display: flex; align-items: center; justify-content: center;
  text-align: center; font-family: var(--f-mono); font-size: 0.56rem; font-weight: 700; letter-spacing: 0.03em;
  transform: rotate(-9deg); opacity: 0.5; line-height: 1.15; text-transform: uppercase;
}
.headline { margin-bottom: 20px; }
.headline-label { font-size: 0.86rem; color: var(--ink-soft); margin-bottom: 4px; }
.headline-value { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.5rem); font-weight: 600; color: var(--ink); }
.headline-value .cur { font-size: 0.62em; color: var(--ink-faint); margin-right: 2px; }

.ledger-rows { border-top: 1px dashed var(--rule); padding-top: 14px; }
.ledger-row { display: flex; align-items: baseline; gap: 8px; padding: 7px 0; }
.ledger-row .lbl { font-size: 0.88rem; color: var(--ink-soft); flex-shrink: 0; }
.ledger-row .dots { flex: 1; border-bottom: 1px dotted var(--rule); height: 1px; margin-bottom: 4px; }
.ledger-row .val { font-family: var(--f-mono); font-size: 0.94rem; font-weight: 600; color: var(--ink); flex-shrink: 0; }
.ledger-row .val.positive { color: var(--teal); }
.ledger-row .val.negative { color: var(--margin-red); }

.chart-wrap { margin: 20px 0; display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.legend { display: flex; flex-direction: column; gap: 8px; font-size: 0.86rem; }
.legend-item { display: flex; align-items: center; gap: 8px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }
.legend-item .v { font-family: var(--f-mono); color: var(--ink-faint); margin-left: 4px; }

.table-toggle { margin-top: 16px; }
.data-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 0.86rem; }
.data-table th { text-align: right; font-family: var(--f-mono); font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-faint); padding: 8px 6px; border-bottom: 1.5px solid var(--rule); }
.data-table th:first-child, .data-table td:first-child { text-align: left; }
.data-table td { text-align: right; padding: 7px 6px; font-family: var(--f-mono); border-bottom: 1px dotted var(--rule-soft); color: var(--ink-soft); }
.data-table tr:hover td { background: var(--paper); }
.table-scroll { overflow-x: auto; }
details.table-toggle summary { cursor: pointer; font-size: 0.86rem; font-weight: 500; color: var(--teal); list-style: none; display: flex; align-items: center; gap: 6px; }
details.table-toggle summary::-webkit-details-marker { display: none; }
details.table-toggle summary::before { content: "▸"; font-size: 0.7rem; transition: transform 0.15s ease; }
details.table-toggle[open] summary::before { transform: rotate(90deg); }

/* ==========================================================================
   Content sections: explainer, FAQ, related
   ========================================================================== */
.content-section { max-width: 760px; margin: 56px auto 0; }
.content-section h2 { margin-bottom: 14px; }
.formula-box {
  background: var(--paper-raised); border: 1px solid var(--rule); border-left: 3px solid var(--teal);
  border-radius: var(--radius-m); padding: 16px 20px; margin: 18px 0; font-family: var(--f-mono); font-size: 0.92rem;
  overflow-x: auto; white-space: nowrap; color: var(--ink);
}
.faq-item { border-top: 1px solid var(--rule); padding: 16px 0; }
.faq-item:last-child { border-bottom: 1px solid var(--rule); }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--ink); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-family: var(--f-mono); color: var(--ink-faint); flex-shrink: 0; }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin-top: 10px; }

.related-section { max-width: 1180px; margin: 56px auto 0; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; margin-top: 16px; }
.related-card {
  display: block; text-decoration: none; background: var(--paper-raised); border: 1px solid var(--rule);
  border-radius: var(--radius-m); padding: 16px; transition: border-color 0.12s ease;
}
.related-card:hover { border-color: var(--margin-red); }
.related-card .tool-code { margin-bottom: 8px; display: inline-block; }
.related-card .rc-name { display: block; font-weight: 600; color: var(--ink); margin-bottom: 3px; }
.related-card .rc-desc { font-size: 0.82rem; color: var(--ink-faint); }

.disclaimer-strip {
  max-width: 760px; margin: 40px auto 0; padding: 14px 18px; border: 1px dashed var(--rule);
  border-radius: var(--radius-m); font-size: 0.82rem; color: var(--ink-faint); background: var(--paper-raised);
}
.rates-note { font-size: 0.78rem; color: var(--ink-faint); margin-top: 10px; font-family: var(--f-mono); }

/* ==========================================================================
   Category index pages
   ========================================================================== */
.category-hero { padding: 40px 0 10px; }
.category-hero .eyebrow { margin-bottom: 10px; }

/* Utility */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.mt-0 { margin-top: 0; }