/* ==========================================================================
   Shared styles — clean, trustworthy fintech aesthetic (CLAUDE.md §1b).
   Mobile-first. One calm deep-blue accent, generous white space, large
   readable result numbers, ≥44px touch targets. System fonts (no external
   request) for speed + privacy. One stylesheet for the whole site (§7).
   ========================================================================== */

:root {
  --accent: #1657d0;
  --accent-dark: #0f3fa0;
  --accent-soft: #e8f0fe;
  --positive: #0a8f50;
  --positive-soft: #e6f5ee;
  --warn-soft: #fdf3e7;

  --ink: #0f1b2d;
  --ink-2: #43526b;
  --muted: #6b7a90;
  --line: #e4e8ef;
  --bg: #ffffff;
  --bg-soft: #f6f8fb;

  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(16, 27, 45, .06), 0 8px 28px rgba(16, 27, 45, .07);
  --maxw: 760px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg-soft);
  line-height: 1.6;
  font-size: 17px;
}

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

h1, h2, h3 { line-height: 1.25; color: var(--ink); letter-spacing: -0.01em; }
h1 { font-size: 1.7rem; margin: 0 0 .5rem; }
h2 { font-size: 1.3rem; margin: 2rem 0 .75rem; }
h3 { font-size: 1.05rem; margin: 1.25rem 0 .4rem; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 18px; }

/* ---------- Header / nav ---------- */
.site-header {
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
}
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 700; color: var(--ink); font-size: 1.05rem; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; display: grid; place-items: center; font-weight: 800; font-size: .95rem;
}
.nav-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink); font-size: 1.2rem; cursor: pointer;
}
#site-nav { display: none; }
#site-nav.is-open {
  display: block; position: absolute; left: 0; right: 0; top: 100%;
  background: var(--bg); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
}
#site-nav.is-open ul { list-style: none; margin: 0; padding: 8px 18px 14px; }
#site-nav.is-open li { padding: 4px 0; }
#site-nav a { display: block; padding: 10px 4px; color: var(--ink-2); font-weight: 500; }

/* ---------- Layout ---------- */
main { padding: 22px 0 40px; }
.page-intro { color: var(--ink-2); margin: 0 0 1.25rem; }
.breadcrumbs { font-size: .85rem; color: var(--muted); margin: 4px 0 14px; }
.breadcrumbs a { color: var(--muted); }

.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 18px;
}

/* ---------- Form ---------- */
.field { margin-bottom: 16px; }
.field > label { display: block; font-weight: 600; font-size: .95rem; margin-bottom: 7px; }
.field .hint { font-weight: 400; color: var(--muted); font-size: .85rem; }

input[type="number"], input[type="text"], input[type="email"], select, textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--ink);
  background: var(--bg);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.input-prefix { position: relative; }
.input-prefix > span { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 1.05rem; pointer-events: none; }
.input-prefix > input { padding-left: 30px; }

/* Segmented toggle (regime / FY) */
.segmented { display: inline-flex; background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 4px; gap: 4px; width: 100%; }
.segmented label {
  flex: 1; text-align: center; padding: 11px 10px; border-radius: 7px; cursor: pointer;
  font-weight: 600; font-size: .95rem; color: var(--ink-2); user-select: none;
}
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented input:checked + label { background: var(--bg); color: var(--accent); box-shadow: var(--shadow); }

.field--check { display: flex; align-items: center; gap: 10px; }
.field--check input { width: 20px; height: 20px; min-height: 0; accent-color: var(--accent); }
.field--check label { font-weight: 500; margin: 0; }

details.deductions { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0 14px; }
details.deductions > summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; }
details.deductions > summary::-webkit-details-marker { display: none; }
details.deductions > summary::after { content: "＋"; float: right; color: var(--muted); }
details.deductions[open] > summary::after { content: "−"; }
details.deductions[open] { padding-bottom: 8px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 20px; border: none; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn--ghost { background: transparent; color: var(--ink-2); border: 1.5px solid var(--line); }
.btn--ghost:hover { background: var(--bg-soft); }
.btn--block { width: 100%; }

/* ---------- Result block (the highest-engagement real estate) ---------- */
.result {
  background: linear-gradient(180deg, var(--accent-soft), #fff 70%);
  border: 1px solid #d4e0fb;
}
.result__label { font-size: .9rem; color: var(--ink-2); margin: 0; font-weight: 600; }
.result__amount { font-size: 2.6rem; font-weight: 800; letter-spacing: -0.02em; color: var(--ink); margin: 2px 0 2px; }
.result__sub { color: var(--ink-2); margin: 0; font-size: .95rem; }

.savings-pill {
  display: inline-flex; align-items: center; gap: 7px; margin-top: 10px;
  background: var(--positive-soft); color: var(--positive); font-weight: 700;
  padding: 8px 13px; border-radius: 999px; font-size: .95rem;
}

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 16px; }
.compare__cell { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px; background: var(--bg); }
.compare__cell.is-better { border-color: var(--positive); box-shadow: 0 0 0 2px var(--positive-soft); }
.compare__name { font-size: .82rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; margin: 0; }
.compare__val { font-size: 1.5rem; font-weight: 700; margin: 4px 0 0; }
.compare__tag { font-size: .75rem; color: var(--positive); font-weight: 700; }

.breakdown { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: .95rem; }
.breakdown th, .breakdown td { text-align: left; padding: 9px 4px; border-bottom: 1px solid var(--line); }
.breakdown td:last-child, .breakdown th:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.breakdown tr:last-child td { border-bottom: none; font-weight: 700; }

.error-msg { color: #b42318; background: #fdeceb; border-radius: var(--radius-sm); padding: 10px 13px; font-size: .9rem; margin-top: 10px; }
[hidden] { display: none !important; }

/* Principal vs interest split bar (EMI) */
.split-bar { display: flex; height: 14px; border-radius: 999px; overflow: hidden; margin-top: 16px; background: var(--line); }
.split-bar__seg { height: 100%; transition: width .2s ease; }
.split-bar__seg--principal { background: var(--accent); }
.split-bar__seg--interest { background: #f0a818; }
.split-legend { display: flex; gap: 18px; margin-top: 10px; font-size: .9rem; color: var(--ink-2); }
.split-legend .dot { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: middle; }
.dot--principal { background: var(--accent); }
.dot--interest { background: #f0a818; }

/* Related calculators cross-links (internal linking → more pages/session) */
.related ul { list-style: none; padding: 0; margin: 8px 0 0; }
.related li { padding: 6px 0; color: var(--ink-2); }

/* Language switcher (English · हिन्दी · தமிழ் · తెలుగు · বাংলা) */
.lang-note { margin: 0 0 10px; font-size: .9rem; color: var(--muted); }
.lang-note a { font-weight: 600; }
.lang-note__current { font-weight: 700; color: var(--ink); }

/* "Calculators" dropdown in the header (config-driven, keeps the nav uncluttered) */
.nav-calc { position: relative; }
.nav-calc summary { list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 5px; color: var(--ink-2); font-weight: 500; }
.nav-calc summary::-webkit-details-marker { display: none; }
.nav-calc summary::after { content: "▾"; font-size: .85em; color: var(--muted); }
.nav-calc__all { font-weight: 600; }

/* Desktop: floating two-column panel below the summary */
@media (min-width: 720px) {
  #site-nav .nav-calc__panel {
    position: absolute; top: 100%; left: 0; z-index: 30; margin-top: 10px;
    min-width: 360px; display: grid; grid-template-columns: 1fr 1fr; gap: 2px;
    background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
    box-shadow: var(--shadow); padding: 8px;
  }
  #site-nav .nav-calc__panel a { padding: 10px 12px; border-radius: 7px; color: var(--ink); font-weight: 500; }
  #site-nav .nav-calc__panel a:hover { background: var(--bg-soft); text-decoration: none; }
  .nav-calc__all { grid-column: 1 / -1; border-top: 1px solid var(--line); margin-top: 4px; }
}

/* Mobile: the dropdown sits inside the hamburger menu, indented */
@media (max-width: 719px) {
  .nav-calc__panel { padding: 2px 0 6px 14px; }
}

/* ---------- Ad placeholders (replaced with real units after approval) ---------- */
.ad-slot {
  margin: 18px 0; min-height: 90px; display: grid; place-items: center;
  background: repeating-linear-gradient(45deg, #f3f5f9, #f3f5f9 10px, #eef1f6 10px, #eef1f6 20px);
  border: 1px dashed #c9d2e0; border-radius: var(--radius-sm); color: var(--muted);
  font-size: .8rem; letter-spacing: .04em; text-transform: uppercase;
}

/* ---------- Long-form content / FAQ ---------- */
.prose p { color: var(--ink-2); }
.prose ul { color: var(--ink-2); padding-left: 1.2rem; }
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; float: right; color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 0; }

/* ---------- Calculator grid (list cards on landing) ---------- */
.calc-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin: 18px 0; }
.calc-card { display: block; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.calc-card:hover { border-color: var(--accent); text-decoration: none; }
.calc-card h3 { margin: 0 0 4px; }
.calc-card p { margin: 0; color: var(--ink-2); font-size: .92rem; }
.calc-card.is-soon { opacity: .6; box-shadow: none; }
.calc-card .soon-tag { font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 700; }

/* ---------- Footer ---------- */
.site-footer { background: var(--bg); border-top: 1px solid var(--line); padding: 26px 0; margin-top: 30px; color: var(--muted); font-size: .9rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 10px; }
.site-footer a { color: var(--ink-2); }
.disclaimer { font-size: .82rem; color: var(--muted); }

/* ---------- Consent banner ---------- */
.consent {
  position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 40;
  background: var(--ink); color: #fff; border-radius: var(--radius); padding: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,.3); display: grid; gap: 12px;
}
.consent__text { margin: 0; font-size: .9rem; line-height: 1.5; }
.consent__text a { color: #cfe0ff; }
.consent__actions { display: flex; gap: 10px; justify-content: flex-end; }
.consent .btn--ghost { color: #fff; border-color: rgba(255,255,255,.4); }

/* ---------- Desktop ---------- */
@media (min-width: 720px) {
  h1 { font-size: 2.1rem; }
  .card { padding: 24px; }
  .nav-toggle { display: none; }
  #site-nav { display: block !important; position: static; box-shadow: none; border: none; background: none; }
  #site-nav ul { display: flex; align-items: center; gap: 22px; list-style: none; margin: 0; padding: 0; }
  #site-nav a { padding: 8px 0; }
  .nav-calc summary { padding: 8px 0; }
  .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .result__amount { font-size: 3rem; }
  .calc-grid { grid-template-columns: 1fr 1fr; }
  .consent { left: auto; right: 18px; max-width: 460px; }
}