@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=Kalam:wght@400;700&display=swap');

/* ============================================================
   cbsepyq+ brand layer v3 - full component style for all pages
   ============================================================ */

:root {
  --brand-navy:#0B1F3A; --brand-navy-raised:#132C4D;
  --brand-green:#226E2C; --action-green:#226E2C; --brand-yellow:#FFC629;
  --brand-paper:#EEF2EF; --green-tint:#E8F5E5; --yellow-tint:#FFF4CE;
  --math-standard:#346BC8; --math-basic:#23794C; --science:#7855B0; --social-science:#B96924;
  --ink:#1B2320; --ink-soft:#5A6A5A; --accent:#226E2C; --accent-2:#E27A22;
  --dark:#1B2320; --rule:#C8D4CA; --sol-bg:#E8F5E5; --band:#E0E8E2; --bg:#EEF2EF;
  --serif:'Lora',Georgia,'Times New Roman',serif;
  --sans:'Plus Jakarta Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  /* --- CBSEPYQ+ V3 semantic aliases (Stage 1, no value change) --- */
  --surface-page: var(--bg);
  --surface-card: #E0E8E2;
  --surface-raised: #E0E8E2;
  --text-primary: var(--ink);
  --text-secondary: var(--ink-soft);
  --stroke: var(--rule);
  --focus: var(--brand-navy);
  --success: var(--brand-green);
  --error: #B13E3E;
  --subject-std: var(--math-standard);
  --subject-basic: var(--math-basic);
  --subject-science: var(--science);
  --subject-social: var(--social-science);
  /* --- Type, spacing, motion tokens (1 Nov 2026) --- */
  --fs-caption: .75rem;
  --fs-small: .875rem;
  --fs-body: 1rem;
  --fs-emphasis: 1.25rem;
  --fs-display: 1.5rem;
  --fs-heading: 1.625rem;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --motion-fast: 120ms;
  --motion-base: 180ms;
  --motion-slow: 240ms;
  --ease-standard: cubic-bezier(.2, 0, 0, 1);
}

/* ---- Reset & base ---- */
*,*::before,*::after{box-sizing:border-box}
body {
  font-family: var(--sans); font-size: var(--fs-body); line-height: 1.65;
  color: var(--ink); background: var(--bg);
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  margin: 0;
}
h1, h2, h3, h4, h5, h6 { font-family: var(--sans); letter-spacing: -.025em; line-height: 1.25; margin: 0 0 .5em; color: var(--ink); }
h1 { font-weight: 800; font-size: clamp(1.65rem, 3vw, 2.2rem); }
h2 { font-weight: 700; font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
h3 { font-weight: 700; font-size: 1.15rem; }
a { color: var(--action-green); text-underline-offset: 3px; }

/* ---- Layout wrapper ---- */
.wrap { max-width: 820px; margin: 0 auto; padding: 0 20px; }

/* ---- Header bar ---- */
.top {
  background: rgba(224,232,226,.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
  position: sticky; top: 0; z-index: 50;
}
.top nav { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand {
  font-family: var(--sans); font-weight: 800; font-size: 1.32rem;
  letter-spacing: -.06em; color: var(--dark); text-decoration: none;
  display: inline-flex; align-items: baseline; line-height: 1;
}
.brand .brand-plus {
  color: var(--brand-yellow); font-weight: 700; letter-spacing: 0;
  margin-left: 1px; font-size: 1.28em; line-height: 1;
}
.brand-pi { display: none !important; }
.navlinks { display: flex; gap: 6px; align-items: center; }
.navlink {
  font-family: var(--sans); font-size: var(--fs-small); font-weight: 600;
  color: var(--ink-soft); text-decoration: none; padding: 8px 12px;
  border-radius: 8px; transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.navlink:hover { color: var(--ink); background: var(--band); }
.navlink.unlock, .navlink.hot {
  background: var(--dark); color: #fff !important;
  padding: 9px 16px; border-radius: 10px; font-weight: 700;
  margin-left: 6px;
}
.navlink.unlock:hover, .navlink.hot:hover { background: var(--brand-navy-raised); color: #fff !important; }
.grow { flex-grow: 1; }

/* ---- Skip link ---- */
.skip {
  position: fixed; left: 14px; top: -60px; z-index: 100;
  background: var(--dark); color: #fff; padding: 10px 15px;
  border-radius: 8px; text-decoration: none; font-weight: 600;
}
.skip:focus { top: 10px; }

/* ---- Breadcrumbs ---- */
.crumbs {
  font-family: var(--sans); font-size: .88rem; color: var(--ink-soft);
  margin: 20px 0; display: flex; align-items: center;
  gap: 8px; flex-wrap: wrap;
}
.crumbs a {
  color: var(--ink); background: var(--surface-card); border: 1px solid var(--rule);
  text-decoration: none; font-weight: 600; padding: 6px 12px;
  border-radius: 8px; transition: all var(--motion-fast) var(--ease-standard);
}
.crumbs a:hover { border-color: var(--action-green); color: var(--action-green); }
.crumbs .current { color: var(--ink-soft); font-weight: 700; padding: 6px 4px; }
.crumbs .sep { color: var(--ink-soft); opacity: .4; }

/* ---- Page title (chapter/question pages) ---- */
h1.pgtitle, .pgtitle {
  font-family: 'Lora', Georgia, serif; font-weight: 600;
  font-size: clamp(1.75rem, 3.2vw, 2.35rem); letter-spacing: -.035em;
  line-height: 1.18; color: var(--ink); margin: 8px 0 12px;
}
.pgsub {
  font-size: 1.02rem; color: var(--ink-soft); line-height: 1.6;
  margin-bottom: 22px; max-width: 70ch;
}

/* ---- Hint box ---- */
.hint {
  font-size: .9rem; color: var(--ink-soft); background: var(--band);
  border-left: 3px solid var(--brand-yellow); padding: 12px 18px;
  border-radius: 0 10px 10px 0; margin: 18px 0;
}
.hint kbd, kbd {
  font-family: ui-monospace, monospace; font-size: .78rem;
  padding: 2px 7px; background: var(--surface-card); border: 1px solid var(--rule);
  border-radius: 5px; color: var(--ink); box-shadow: 0 1px 0 var(--rule);
}

/* ---- Section headings ---- */
.topic-h, h2.topic-h {
  font-family: var(--sans); font-size: 1.15rem; font-weight: 800;
  letter-spacing: -.02em; color: var(--dark);
  margin: 32px 0 14px; padding-bottom: 8px;
  border-bottom: 2px solid var(--brand-yellow);
  display: inline-block; width: auto;
}

.mark-band {
  font-family: var(--sans); font-size: .76rem; font-weight: 800;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--action-green); margin: 22px 0 10px;
}

/* ---- Filter bar ---- */
.stickyfilters {
  position: sticky; top: 62px; z-index: 40;
  background: rgba(224,232,226,.94); backdrop-filter: blur(10px);
  padding: 12px 0; margin: 0 0 22px;
  border-bottom: 1px solid var(--rule);
}
.fbar {
  font-family: var(--sans); font-size: .85rem;
  display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center;
  margin-bottom: 10px;
}
.fgrp { display: inline-flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.fgrp > b { color: var(--ink); font-weight: 700; font-size: .82rem; margin-right: 2px; }
.fchip {
  border: 1px solid var(--rule); border-radius: 999px;
  padding: 6px 14px; background: var(--surface-card); color: var(--ink-soft);
  cursor: pointer; font-family: inherit; font-weight: 600; font-size: .82rem;
  transition: all var(--motion-fast) var(--ease-standard);
}
.fchip:hover { border-color: var(--action-green); color: var(--action-green); }
.fchip.on { background: var(--dark); color: #fff; border-color: var(--dark); }
.fchip.rep-chip { background: var(--yellow-tint); border-color: var(--brand-yellow); color: #6a4c0f; }
.fchip.rep-chip.on { background: var(--brand-yellow); color: #101828; border-color: var(--brand-yellow); }
.filter {
  width: 100%; padding: 12px 16px; border: 1px solid var(--rule);
  border-radius: 12px; font-family: inherit; font-size: .95rem;
  background: var(--surface-card); color: var(--ink); transition: border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
}
.filter:focus { outline: none; border-color: var(--action-green); box-shadow: 0 0 0 3px rgba(34,110,44,.12); }

/* ---- Question card ---- */
.qcard {
  background: var(--surface-card); border: 1px solid var(--rule);
  border-radius: 14px; padding: 22px 24px; margin: 14px 0;
  box-shadow: 0 1px 2px rgba(11,31,58,.03);
  transition: border-color var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
}
.qcard:hover { border-color: #AEBDB1; }
.q-head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px; flex-wrap: wrap;
}
.q-n {
  background: var(--dark); color: #fff; font-size: .8rem;
  font-weight: 800; padding: 3px 10px; border-radius: 7px;
  min-width: 28px; text-align: center;
}
.q-meta { font-size: .76rem; color: var(--ink-soft); font-weight: 500; flex-grow: 1; }
.plink {
  font-size: var(--fs-caption); color: var(--ink-soft); border: 1px solid var(--rule);
  border-radius: 999px; padding: 4px 11px; text-decoration: none;
  font-weight: 600; transition: all var(--motion-fast) var(--ease-standard); white-space: nowrap;
}
.plink:hover { color: var(--action-green); border-color: var(--action-green); background: var(--green-tint); }
.q-text {
  font-size: var(--fs-body); line-height: 1.7; color: var(--ink);
  margin-bottom: 14px;
}
.opts { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 8px; }
.opts.one-col { grid-template-columns: 1fr; }
.opts li {
  font-size: var(--fs-body); line-height: 1.6; padding: 8px 12px;
  border-radius: 8px; background: var(--band);
  display: flex; gap: 10px; align-items: flex-start;
}
.opt-l { font-weight: 800; color: var(--action-green); flex-shrink: 0; min-width: 22px; }

/* ---- Solutions ---- */
details.sol { margin-top: 16px; }
details.sol summary {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: .85rem; font-weight: 700;
  color: #fff; background: var(--dark); border-radius: 999px;
  padding: 9px 18px; cursor: pointer; user-select: none;
  list-style: none; transition: background var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);
}
details.sol summary:hover { background: var(--brand-navy-raised); transform: translateY(-1px); }
details.sol summary::-webkit-details-marker { display: none; }
details.sol .s-hide { display: none; }
details.sol[open] .s-show { display: none; }
details.sol[open] .s-hide { display: inline; }
details.sol summary kbd {
  background: rgba(255,255,255,.2); border: none; color: #fff;
  padding: 1px 6px; font-size: .72rem; box-shadow: none;
}
.sol-inner {
  background: var(--sol-bg); border-left: 3px solid var(--brand-green);
  border-radius: 0 12px 12px 0; padding: 18px 22px; margin-top: 12px;
}
.sol-body { font-size: 15px; line-height: 1.75; color: var(--ink); }
.sol-body br { line-height: 1.75; }

/* ---- Question nav (prev/next) ---- */
.qnav {
  display: flex; justify-content: space-between; gap: 12px;
  margin: 24px 0; flex-wrap: wrap;
}
.qnav a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 16px; background: var(--surface-card); border: 1px solid var(--rule);
  border-radius: 10px; text-decoration: none; font-weight: 600;
  font-size: .9rem; color: var(--ink);
  transition: all var(--motion-fast) var(--ease-standard);
}
.qnav a:hover { border-color: var(--action-green); color: var(--action-green); transform: translateY(-1px); }
.qnav .nxt { margin-left: auto; }

/* ---- Related questions ---- */
.related {
  margin: 32px 0; padding: 20px 22px;
  background: var(--band); border-radius: 12px;
}
.related h2 {
  font-size: 1rem; font-weight: 800; letter-spacing: -.01em;
  text-transform: uppercase; color: var(--ink-soft);
  margin: 0 0 12px;
}
.related ul { list-style: none; padding: 0; margin: 0; }
.related li {
  padding: 10px 0; border-bottom: 1px solid var(--rule);
  font-size: .93rem;
}
.related li:last-child { border-bottom: 0; }
.related li a { color: var(--ink); font-weight: 600; text-decoration: none; }
.related li a:hover { color: var(--action-green); }
.related .q-meta { font-size: .76rem; color: var(--ink-soft); margin-left: 6px; }

/* ---- Repeated banner ---- */
.rep-banner, .tool-banner {
  display: flex; align-items: center; gap: 16px;
  text-decoration: none; background: var(--yellow-tint);
  border: 1px solid var(--brand-yellow);
  border-radius: 16px; padding: 18px 22px; margin: 24px 0;
  color: var(--ink); transition: transform var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
}
.rep-banner:hover, .tool-banner:hover {
  transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255,198,41,.15);
}
.rb-icon, .tb-icon {
  font-size: 1.9rem; background: var(--surface-card);
  border-radius: 14px; width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.rb-h, .tb-h {
  display: block; font-weight: 800; font-size: 1.05rem;
  color: var(--dark); letter-spacing: -.015em; margin-bottom: 3px;
}
.rb-s, .tb-s { font-size: .85rem; color: var(--ink-soft); }
.rb-btn, .tb-btn {
  font-weight: 700; font-size: .88rem; background: var(--dark);
  color: #fff; border-radius: 999px; padding: 10px 20px;
  white-space: nowrap; margin-left: auto;
}

/* ---- Hero (homepage, hub pages) ---- */
.hero { padding: 40px 0 20px; }
.hero h1 {
  font-family: 'Lora', Georgia, serif;
  font-size: clamp(2rem, 4.4vw, 2.9rem);
  line-height: 1.14; font-weight: 600; letter-spacing: -.045em;
  color: var(--ink); margin: 0 0 20px;
}
.hero h1 em {
  font-style: normal; position: relative; white-space: nowrap;
}
.hero h1 em::after {
  content: ""; position: absolute; left: 1%; right: 1%;
  bottom: -.12em; height: 6px; background: var(--brand-yellow);
  border-radius: 100% 65% 70% 50%; transform: rotate(-1deg);
}
.hero p.lead, .hero .lead {
  font-size: 1.05rem; color: var(--ink-soft);
  margin: 0 0 20px; max-width: 62ch; line-height: 1.65;
}
.hero { padding: 40px 0 24px; }

/* ---- Stats pills ---- */
.stats { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 8px; }
.stat {
  font-size: .82rem; font-weight: 700;
  background: var(--band); color: var(--ink);
  border-radius: 999px; padding: 8px 16px;
}

/* ---- Subject picker (homepage + hubs) ---- */
.subject-picker {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px; margin: 16px 0 32px;
}
.subject-picker a {
  display: flex; align-items: center; justify-content: center;
  min-height: 88px; border-radius: 16px; color: #fff;
  text-decoration: none; font-size: 1.05rem; font-weight: 800;
  letter-spacing: -.02em; transition: transform var(--motion-fast) var(--ease-standard), filter var(--motion-base) var(--ease-standard);
  text-align: center; padding: 0 12px;
}
.subject-picker a:hover { transform: translateY(-2px); filter: brightness(.95); }
.subject-picker .maths { background: var(--math-standard); }
.subject-picker .math-basic { background: var(--subject-basic); }
.subject-picker .science { background: var(--science); }
.subject-picker .social-science { background: var(--social-science); }

/* ---- Chapter grid ---- */
.chgrid {
  list-style: none; padding: 0; margin: 16px 0 32px;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}
.chgrid a {
  position: relative; display: block;
  border: 1px solid var(--rule); border-radius: 12px;
  padding: 16px 44px 16px 18px; background: var(--surface-card);
  text-decoration: none; min-height: 62px;
  transition: border-color var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard);
}
.chgrid a:hover {
  border-color: var(--action-green); transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(11,31,58,.06);
}
.chgrid a::after {
  content: "\2192"; position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%); color: var(--ink-soft);
  font-size: 1rem; transition: transform var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.chgrid a:hover::after { color: var(--action-green); transform: translateY(-50%) translateX(3px); }
.chgrid .ch-name {
  display: block; font-weight: 700; color: var(--ink);
  font-size: .95rem; letter-spacing: -.015em; line-height: 1.35;
}
.chgrid .ch-count { display: none; }

/* ---- See all button ---- */
.see-all {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-size: .92rem; font-weight: 700;
  color: var(--action-green); background: transparent;
  border: 1px solid var(--action-green); border-radius: 10px;
  padding: 11px 20px; text-decoration: none; margin: 4px 0 32px;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);
}
.see-all:hover { background: var(--action-green); color: #fff; transform: translateY(-1px); }
.see-all::after { content: "\2192"; }

/* ---- Footer ---- */
.foot {
  background: var(--dark); color: #c5d2dd;
  padding: 40px 0 44px; margin-top: 60px;
}
.foot .wrap { max-width: 820px; }
.foot strong {
  color: #fff; font-weight: 700; display: block; margin-bottom: 12px;
  font-size: .8rem; letter-spacing: .05em; text-transform: uppercase;
}
.foot a { color: #c5d2dd; text-decoration: none; font-size: .88rem; transition: color var(--motion-fast) var(--ease-standard); }
.foot a:hover { color: var(--brand-yellow); }
.foot-subjects { margin-bottom: 22px; }
.foot-subjects a { margin-right: 18px; font-size: .95rem; font-weight: 600; }
.foot-chaps {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px 20px; line-height: 1.8;
}
.foot-chaps a { display: block; }

/* ---- Prose (about, editorial) ---- */
.prose {
  font-family: var(--sans); font-size: 1rem; line-height: 1.78;
  color: var(--ink); max-width: 72ch;
}
.prose h2 {
  font-family: 'Lora', Georgia, serif; font-weight: 600;
  letter-spacing: -.03em; font-size: 1.55rem; margin: 2.2rem 0 .6rem;
}
.prose p { margin: 0 0 1rem; }

/* ---- Trust grid ---- */
.trust-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px; margin: 20px 0;
}
.trust-card {
  background: var(--surface-card); border: 1px solid var(--rule);
  border-radius: 14px; padding: 22px;
}
.trust-card h2, .trust-card h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 8px; }
.trust-card p { font-size: .92rem; color: var(--ink-soft); margin: 0; }

/* ---- Subject cards (hub pages) ---- */
.subject-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px; margin: 20px 0;
}
.subject-card {
  display: block; padding: 22px; background: var(--surface-card);
  border: 1px solid var(--rule); border-radius: 14px;
  text-decoration: none; transition: all var(--motion-fast) var(--ease-standard);
}
.subject-card:hover { border-color: var(--action-green); transform: translateY(-2px); }
.subject-card h2 { font-size: 1.1rem; margin: 0 0 6px; }

/* ---- Continue card / path panel ---- */
.continue-card, .path-panel, .purchase-panel {
  background: var(--surface-card); border: 1px solid var(--rule);
  border-radius: 14px; padding: 22px; margin: 20px 0;
}

/* ---- Hub hero (subject pages) ---- */
.hub-hero { padding: 32px 0 20px; }

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .foot-chaps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 700px) {
  .subject-picker { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .subject-picker a { min-height: 72px; padding: 0 8px; font-size: .95rem; }
  .chgrid { grid-template-columns: 1fr; }
  .top nav { height: 56px; }
  .brand { font-size: 1.18rem; }
  .navlink { padding: 6px 8px; font-size: .82rem; }
  .navlink.unlock, .navlink.hot { padding: 8px 12px; font-size: .78rem; margin-left: 2px; }
  .rep-banner, .tool-banner { flex-wrap: wrap; padding: 16px; }
  .rb-btn, .tb-btn { width: 100%; text-align: center; margin-left: 0; margin-top: 8px; }
  .foot-chaps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qcard { padding: 18px 16px; }
  .stickyfilters { top: 56px; }
}
/* ==== v3.1 defensive nav CTA (14 Oct 2026) ==== */
.top .navlinks .navlink.unlock,
.top .navlinks .navlink.hot {
  background: var(--dark) !important;
  color: #fff !important;
  padding: 9px 16px !important;
  border-radius: 10px !important;
  font-weight: 700 !important;
  text-decoration: none !important;
  white-space: nowrap !important;
  font-size: .86rem !important;
  line-height: 1.1 !important;
  display: inline-flex !important;
  align-items: center !important;
  transition: background var(--motion-fast) var(--ease-standard) !important;
}
.top .navlinks .navlink.unlock:hover,
.top .navlinks .navlink.hot:hover {
  background: var(--brand-navy-raised) !important;
  color: #fff !important;
}
@media (max-width: 700px) {
  /* On mobile: keep brand + CTA visible; hide middle links to avoid crowding */
  .top .navlinks .navlink:not(.unlock):not(.hot) { display: none; }
  .top .navlinks .navlink.unlock, .top .navlinks .navlink.hot {
    padding: 8px 12px !important; font-size: .8rem !important;
  }
}
/* ==== v3.2 footer chapter fix (14 Oct 2026) ==== */
.foot-chaps {
  display: grid !important;
  grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
  gap: 6px 24px !important;
  line-height: 1.7 !important;
  align-items: start !important;
}
.foot-chaps a {
  display: block !important;
  margin: 0 !important;
  padding: 0 !important;
  font-size: .86rem !important;
  line-height: 1.5 !important;
  overflow-wrap: anywhere !important;
  word-break: normal !important;
  min-height: 1.5em !important;
}
@media (max-width: 900px) {
  .foot-chaps { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
}
@media (max-width: 500px) {
  .foot-chaps { grid-template-columns: 1fr !important; gap: 6px 0 !important; }
}
/* ==== v3.3 nav CTA sizing balance (14 Oct 2026) ==== */
.top .navlinks .navlink.unlock,
.top .navlinks .navlink.hot {
  padding: 7px 14px !important;
  font-size: .82rem !important;
  font-weight: 600 !important;
  border-radius: 8px !important;
  line-height: 1.15 !important;
}
.top nav { height: 60px !important; }
.brand { font-size: 1.36rem !important; }
@media (max-width: 700px) {
  .top .navlinks .navlink.unlock, .top .navlinks .navlink.hot {
    padding: 6px 11px !important; font-size: .78rem !important;
  }
  .top nav { height: 56px !important; }
  .brand { font-size: 1.2rem !important; }
}
/* ==== v3.4 unified nav (14 Oct 2026) ==== */
.top nav { height: 62px !important; align-items: center !important; }
.top .navlinks { display: flex !important; align-items: center !important; gap: 4px !important; }
.top .navlinks .navlink {
  font-family: var(--sans) !important;
  font-size: .875rem !important;
  font-weight: 500 !important;
  line-height: 1 !important;
  padding: 8px 12px !important;
  margin: 0 !important;
  border-radius: 8px !important;
  background: transparent !important;
  color: var(--ink-soft) !important;
  text-decoration: none !important;
  display: inline-flex !important;
  align-items: center !important;
  vertical-align: middle !important;
  transition: color var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard) !important;
}
.top .navlinks .navlink:hover { color: var(--ink) !important; background: var(--band) !important; }
.top .navlinks .navlink.unlock,
.top .navlinks .navlink.hot {
  background: var(--brand-yellow) !important;
  color: #0B1F3A !important;
  font-weight: 600 !important;
  font-size: .84rem !important;
  padding: 9px 16px !important;
  border-radius: 10px !important;
  margin-left: 10px !important;
}
.top .navlinks .navlink.unlock:hover,
.top .navlinks .navlink.hot:hover {
  background: #F0B429 !important;
  color: #0B1F3A !important;
}
.brand {
  font-size: 1.36rem !important;
  line-height: 1 !important;
  display: inline-flex !important;
  align-items: baseline !important;
}
@media (max-width: 700px) {
  .top nav { height: 56px !important; }
  .top .navlinks .navlink { font-size: .82rem !important; padding: 6px 9px !important; }
  .top .navlinks .navlink.unlock, .top .navlinks .navlink.hot {
    font-size: .8rem !important; padding: 8px 13px !important; margin-left: 6px !important;
  }
  .brand { font-size: 1.2rem !important; }
}
/* ==== v3.5 mobile nav cleanup + brand size (14 Oct 2026) ==== */
.brand { font-size: 1.5rem !important; }
.top .brand .brand-plus { font-size: 1.32em !important; }

@media (max-width: 700px) {
  .top .navlinks .navlink:not(.unlock):not(.hot) { display: none !important; }
  .top .navlinks { gap: 8px !important; }
  .brand { font-size: 1.32rem !important; }
  .top .navlinks .navlink.unlock, .top .navlinks .navlink.hot {
    font-size: .82rem !important; padding: 8px 14px !important; margin-left: 0 !important;
  }
}
/* ==== v3.6 homepage sections (14 Oct 2026) ==== */
.wrap { max-width: 820px; }

/* Steps strip */
.steps-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 24px 0 36px; }
.step-card { background: var(--surface-card); border: 1px solid var(--rule); border-radius: 14px; padding: 22px 20px; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 50%; background: var(--green-tint); color: var(--action-green); font-weight: 800; font-size: 1rem; margin-bottom: 14px; }
.step-card h3 { font-size: 1rem; font-weight: 800; margin: 0 0 6px; color: var(--ink); letter-spacing: -.015em; }
.step-card p { font-size: .9rem; color: var(--ink-soft); margin: 0; line-height: 1.55; }

/* Exam updates preview */
.updates-preview { margin: 32px 0; padding: 26px 26px 20px; border: 1px solid var(--rule); border-radius: 16px; background: var(--surface-card); }
.updates-preview h2 { font-family: var(--sans); font-size: 1.15rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 6px; color: var(--dark); padding: 0; border: none; display: block; }
.updates-preview .subtitle { font-size: .88rem; color: var(--ink-soft); margin: 0 0 16px; }
.update-item { display: flex; align-items: center; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--rule); text-decoration: none; color: var(--ink); transition: color var(--motion-fast) var(--ease-standard); }
.update-item:last-of-type { border-bottom: 0; }
.update-item:hover { color: var(--action-green); }
.update-tag { display: inline-block; font-size: .68rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; padding: 4px 10px; border-radius: 6px; background: var(--yellow-tint); color: #6a4c0f; flex-shrink: 0; }
.update-title { font-size: .95rem; font-weight: 600; flex: 1; line-height: 1.4; }
.update-arrow { color: var(--ink-soft); }
.update-item:hover .update-arrow { color: var(--action-green); }
.updates-preview .browse-all { display: inline-block; margin-top: 14px; font-size: .9rem; font-weight: 700; color: var(--action-green); text-decoration: none; }
.updates-preview .browse-all:hover { text-decoration: underline; }

/* FAQ */
.faq { margin: 36px 0 24px; }
.faq h2 { font-family: var(--sans); font-size: 1.15rem; font-weight: 800; letter-spacing: -.02em; margin: 0 0 16px; color: var(--dark); padding-bottom: 8px; border-bottom: 2px solid var(--brand-yellow); display: inline-block; }
.faq-item { border-bottom: 1px solid var(--rule); }
.faq-item:last-child { border-bottom: 0; }
.faq-item summary { list-style: none; cursor: pointer; padding: 16px 4px; font-size: .98rem; font-weight: 700; color: var(--ink); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.3rem; font-weight: 400; color: var(--ink-soft); flex-shrink: 0; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin: 0 4px 16px; font-size: .93rem; color: var(--ink-soft); line-height: 1.7; }

@media (max-width: 700px) {
  .steps-strip { grid-template-columns: 1fr; gap: 12px; }
  .updates-preview { padding: 20px 18px; }
}
/* ==== v3.7 dark mode (18 Oct 2026) ==== */

/* header theme toggle (button injected by /assets/theme.js) */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--rule); background: var(--surface-card); color: var(--ink);
  font-size: 1rem; line-height: 1; padding: 0; cursor: pointer;
  flex-shrink: 0; margin-left: 8px;
  transition: border-color var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard);
}
.theme-toggle:hover { border-color: var(--action-green); }
.theme-toggle .theme-toggle-icon { display: block; line-height: 1; }
.theme-toggle .theme-toggle-icon svg { display: block; width: 20px; height: 20px; }

/* dark palette (mirrors the paid app dark tokens) */
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #2B2B2B; --band: #3A3A3A; --rule: #4A4A4A;
  --ink: #D0D0C8; --ink-soft: #9A9A90;
  --dark: #3A3A3A;
  --accent: #69C594; --accent-2: #F0A05A; --action-green: #69C594;
  --sol-bg: #152B20; --green-tint: #16301F; --yellow-tint: #3A2E12;
  --brand-paper: #3A3A3A;
  --brand-navy: #4A4A4A; --brand-navy-raised: #555555;
  --focus: #8FB9FF; --error: #E07777;
  --surface-page: var(--bg); --surface-card: #3A3A3A; --surface-raised: #3A3A3A;
  --math-standard: #8FB9FF; --math-basic: #69C594; --science: #C2A7FF; --social-science: #FFC48A;
}

/* header / chrome */
[data-theme="dark"] .top { background: rgba(43,43,43,.92); }
[data-theme="dark"] .stickyfilters { background: rgba(43,43,43,.94); }
[data-theme="dark"] .theme-toggle { background: #3A3A3A; }
[data-theme="dark"] .brand { color: var(--ink); }

/* headings that hardcode navy as text */
[data-theme="dark"] .topic-h,
[data-theme="dark"] h2.topic-h,
[data-theme="dark"] .rb-h,
[data-theme="dark"] .tb-h,
[data-theme="dark"] .updates-preview h2,
[data-theme="dark"] .faq h2 { color: var(--ink); }

/* hardcoded white surfaces */
[data-theme="dark"] .qcard,
[data-theme="dark"] .crumbs a,
[data-theme="dark"] .fchip,
[data-theme="dark"] .filter,
[data-theme="dark"] .qnav a,
[data-theme="dark"] .chgrid a,
[data-theme="dark"] kbd,
[data-theme="dark"] .tb-icon,
[data-theme="dark"] .rb-icon,
[data-theme="dark"] .trust-card,
[data-theme="dark"] .subject-card,
[data-theme="dark"] .step-card,
[data-theme="dark"] .updates-preview,
[data-theme="dark"] .path-card,
[data-theme="dark"] .checkin button,
[data-theme="dark"] .purchase-panel,
[data-theme="dark"] .purchase-product,
[data-theme="dark"] .purchase-field input,
[data-theme="dark"] .continue-card { background: #3A3A3A; }
[data-theme="dark"] .crumbs a:hover { background: #3A3A3A; }
[data-theme="dark"] .qcard:hover { border-color: #5A5A5A; }
[data-theme="dark"] .crumbs a,
[data-theme="dark"] .qnav a,
[data-theme="dark"] .path-card,
[data-theme="dark"] .checkin button,
[data-theme="dark"] .purchase-field input,
[data-theme="dark"] .purchase-field label { color: var(--ink); }

/* tables */
[data-theme="dark"] .qtbl th,
[data-theme="dark"] .qtbl td { border-color: var(--rule); }

/* tinted chips / labels on dark */
[data-theme="dark"] .fchip.rep-chip,
[data-theme="dark"] .update-tag,
[data-theme="dark"] .rep-times { color: #F0CE7E; }
[data-theme="dark"] .fchip.rep-chip.on {
  background: var(--brand-yellow); color: #101828; border-color: var(--brand-yellow);
}

/* status text */
[data-theme="dark"] .purchase-status[data-state="error"] { color: #F08A8A; }
[data-theme="dark"] .purchase-status[data-state="success"] { color: #7DDFA0; }
[data-theme="dark"] .purchase-status[data-state="processing"] { color: #F0C070; }

/* light-green fills keep readable text */
[data-theme="dark"] .checkin button.on { color: #2B2B2B; }
[data-theme="dark"] .see-all:hover { color: #2B2B2B; }

/* ==== v3.6 existing-user login entry (28 Oct 2026) ==== */
.top .navlinks .navlink.login {
  border: 1px solid var(--rule) !important;
  border-radius: 10px !important;
  background: transparent !important;
  color: var(--ink) !important;
  font-weight: 600 !important;
  margin-left: 6px !important;
  white-space: nowrap !important;
}
.top .navlinks .navlink.login:hover {
  border-color: var(--brand-navy) !important;
  background: var(--band) !important;
  color: var(--ink) !important;
}
@media (max-width: 700px) {
  /* the mobile rule hides every non-CTA navlink - keep this one visible */
  .top nav .navlinks .navlink.login:not(.unlock):not(.hot) {
    display: inline-flex !important;
    font-size: .8rem !important;
    padding: 7px 11px !important;
    margin-left: 0 !important;
  }
  .top nav .navlinks .navlink.unlock,
  .top nav .navlinks .navlink.hot {
    margin-left: 4px !important;
    padding: 8px 12px !important;
  }
}
@media (max-width: 400px) {
  .top .brand { font-size: 1.12rem !important; }
  .top .navlinks { gap: 4px !important; }
  .top nav .navlinks .navlink.login:not(.unlock):not(.hot) {
    font-size: .72rem !important;
    padding: 6px 8px !important;
  }
  .top nav .navlinks .navlink.unlock,
  .top nav .navlinks .navlink.hot {
    font-size: .72rem !important;
    padding: 7px 9px !important;
    margin-left: 2px !important;
  }
}
/* 320px-class screens: brand + Log in + CTA + theme toggle must still fit */
@media (max-width: 340px) {
  .top .brand { font-size: 1.02rem !important; letter-spacing: -.01em !important; }
  .top .navlinks { gap: 3px !important; }
  .top nav .navlinks .navlink.unlock,
  .top nav .navlinks .navlink.hot {
    font-size: .69rem !important;
    padding: 7px 7px !important;
    margin-left: 1px !important;
  }
  .top nav .navlinks .navlink.login:not(.unlock):not(.hot) {
    font-size: .69rem !important;
    padding: 6px 7px !important;
  }
}
/* ============================================================
   Floating, centred-brand header (site-wide, P0 consistency)
   ============================================================ */
.top.top--float {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  padding: 0 16px;
  background: transparent;
  border-bottom: 0;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.top--float .nav--float {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 980px;
  height: 60px !important;
  margin: 0 auto;
  padding: 0 10px;
  border: 1px solid rgba(200, 212, 202, .9);
  border-radius: 999px;
  background: rgba(224, 232, 226, .82);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  box-shadow: 0 10px 30px rgba(11, 31, 58, .10);
}
.top--float .navleft { justify-self: start; }
.top--float .navright { justify-self: end; }
.top--float .navleft .theme-toggle { margin-left: 0; }
.top--float .brand { justify-self: center; }

body.has-float-nav { padding-top: 84px; }
.top--float + main .hero { padding-top: 24px; }
#main-content { scroll-margin-top: 96px; }

[data-theme="dark"] .top.top--float { background: transparent; }
[data-theme="dark"] .top--float .nav--float {
  background: rgba(58, 58, 58, .62);
  border-color: rgba(54, 72, 91, .9);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .35);
}

@media (max-width: 700px) {
  .top.top--float { top: 10px; padding: 0 10px; }
  .top--float .nav--float { height: 56px !important; padding: 0 8px; }
  body.has-float-nav { padding-top: 76px; }
  .top--float + main .hero { padding-top: 20px; }
}

@media (max-width: 560px) {
  /* Brand sits next to the theme toggle; auth + CTA stay on one row. */
  .top.top--float .nav--float {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 6px !important;
  }
  .top.top--float .navleft {
    flex: 0 0 auto !important;
  }
  .top.top--float .brand {
    flex: 0 0 auto !important;
    justify-self: auto !important;
  }
  .top.top--float nav .navright.navlinks {
    margin-left: auto !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 4px !important;
  }
  .top.top--float nav .navright.navlinks .navlink.login:not(.unlock):not(.hot),
  .top.top--float nav .navright.navlinks .navlink.unlock {
    display: inline-flex !important;
    min-height: 0 !important;
    margin-left: 0 !important;
    padding: 5px 8px !important;
    font-size: .7rem !important;
    line-height: 1.1 !important;
  }
}

@media (max-width: 360px) {
  .top.top--float .nav--float { gap: 4px !important; }
  .top.top--float .brand { font-size: 1.02rem !important; }
  .top.top--float nav .navright.navlinks { gap: 2px !important; }
  .top.top--float nav .navright.navlinks .navlink.login:not(.unlock):not(.hot),
  .top.top--float nav .navright.navlinks .navlink.unlock {
    padding: 5px 6px !important;
    font-size: .66rem !important;
  }
}

@media (max-width: 340px) {
  .top.top--float { padding: 0 8px; }
  .top--float .nav--float { padding: 0 8px; }
  .top.top--float nav .navright.navlinks .navlink.unlock {
    font-size: .66rem !important;
    padding: 6px 6px !important;
  }
}

/* ============================================================
   Rigid header: checkout on desktop, every page on mobile
   ============================================================ */
.top.top--rigid {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 0;
  background: rgba(224, 232, 226, .94);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.top--rigid .nav--float {
  height: 62px !important;
  max-width: 980px;
  padding: 0 20px;
  border: 0;
  border-radius: 0;
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  box-shadow: none;
}
[data-theme="dark"] .top.top--rigid { background: rgba(43, 43, 43, .94); }
body.has-rigid-nav { padding-top: 62px; }

@media (max-width: 700px) {
  .top.top--float {
    top: 0;
    padding: 0;
    background: rgba(224, 232, 226, .94);
    border-bottom: 1px solid var(--rule);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }
  .top--float .nav--float {
    height: 56px !important;
    max-width: 980px;
    padding: 0 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    box-shadow: none;
  }
  [data-theme="dark"] .top.top--float { background: rgba(43, 43, 43, .94); }
  body.has-float-nav { padding-top: 56px; }
  body.has-rigid-nav { padding-top: 56px; }
  .top--rigid .nav--float { height: 56px !important; padding: 0 12px; }
}

/* ============================================================
   Accessibility baseline (P1, 1 Nov 2026)
   ============================================================ */
main[id] { scroll-margin-top: 90px; }

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--focus) !important;
  outline-offset: 3px;
}

@media (max-width: 700px) {
  main[id] { scroll-margin-top: 64px; }
  .theme-toggle { width: 44px; height: 44px; }
  .plink { display: inline-flex; align-items: center; min-height: 44px; padding: 8px 12px; }
  .top .navlinks .navlink { display: inline-flex; align-items: center; min-height: 44px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* P2 interaction states */
.navlink:active, .plink:active, .fchip:active, .see-all:active { transform: translateY(1px); }
button:disabled, .btn:disabled, .see-all[aria-disabled="true"] { opacity: .55; cursor: not-allowed; }

/* Home sample cards */
.sqcard{background:var(--surface-card);border:1px solid var(--rule);border-radius:14px;padding:16px 18px;margin:14px 0}
.sample-actions{margin:0 0 30px}
.sample-actions .see-all{background:var(--brand-yellow);border-color:var(--brand-yellow);color:#101828}
.sample-actions .see-all:hover{background:var(--brand-yellow);border-color:var(--brand-yellow);color:#101828;filter:brightness(.95);transform:translateY(-1px)}
/* 404 accent */
.page-accent{display:block;margin:24px 0 0;max-width:140px;height:auto;opacity:.9}
.bank-cta{margin:24px 0 30px}