/* ==========================================================================
   KODEIT Social Science — public product website

   VISUAL SYSTEM: inherited from the KODEIT product-website family. The shared
   base below (tokens, typography, geometry, elevation, buttons, cards, chips,
   tabs, the hero colour wash, the brand rule, header, footer, modal, forms,
   tables, RTL and the responsive ladder) is taken byte-for-byte from
   the KODEIT Pre-K website's stylesheet, which itself inherited it from
   the KODEIT ICT website's stylesheet and the ICT Demo Portal. Pre-K's
   darkened "deep" tones and darkened --ink-3 are kept, because this site puts
   essential strings (ISBN-less book meta, outcome codes, page numbers, table
   headers) in those colours too. See evidence/DESIGN_SYSTEM_AUDIT.md and
   qa/DESIGN_FAMILY_CONSISTENCY.md.

   Everything below the "SOCIAL SCIENCE COMPONENTS" rule is new, and is built
   only from the primitives above — no new colour, typeface or radius.

   The interface deliberately stays modern and restrained. There is no
   parchment, no sepia, no antique-map wallpaper and no flag furniture: the
   geography, history and heritage come from the real book pages, real maps and
   real lesson videos the pages carry, not from the chrome.
   ========================================================================== */

:root{
  /* ---- brand colours, sampled from the KODEIT logo (demo portal) ---- */
  --k-yellow:#FEDA00;
  --k-orange:#FF4A01;
  --k-green:#03A909;
  --k-cyan:#01C3FF;
  /* The four "deep" tones carry text on white and on the soft accent fills.
     KG darkens all four of them by one step so that every one of them clears
     WCAG 2.1 AA (4.5:1) as *small* text on its own soft fill — the ICT values
     sit at 3.79-4.45 there. Same hues, same role, measurably more readable;
     nothing else about them changes. Measured ratios are in
     qa/ICT_KG_DESIGN_CONSISTENCY.md. */
  --k-cyan-deep:#00719C;    /* ICT #0079A8 — 4.45 -> 4.98 on --soft-cyan   */
  --k-green-deep:#047A09;   /* ICT #04820A — 4.45 -> 4.93 on --soft-green  */
  --k-orange-deep:#BC3500;  /* ICT #C43800 — 4.47 -> 4.80 on --soft-orange
                               over a --bg-soft band, its worst case        */
  --k-amber-deep:#856900;   /* ICT #9A7A00 — 3.79 -> 4.87 on --soft-yellow */

  /* ---- neutrals ---- */
  --white:#FFFFFF;
  --bg-soft:#F7F8FA;
  --bg-soft-2:#FAFAFB;
  --ink:#1D2126;
  --ink-2:#5A6472;
  /* ICT confines --ink-3 to decorative text because it clears only 3.07:1.
     The KG pages put essential strings in it — book levels, ISBNs, table
     headers, rubric-scale labels, source notes — so it is darkened one step
     to clear AA on white, --bg-soft and --bg-soft-2 alike. Same cool-grey
     hue, same position in the ink -> ink-2 -> ink-3 hierarchy. */
  --ink-3:#68717F;          /* ICT #8B94A1 — 3.07 -> 4.93 on white         */
  --line:#E8EAEF;
  --line-2:#D9DDE4;

  /* ---- the signature device ---- */
  --brand-line:linear-gradient(90deg,var(--k-yellow) 0%,var(--k-orange) 34%,var(--k-green) 67%,var(--k-cyan) 100%);

  /* ---- elevation: neutral, restrained ---- */
  --shadow-sm:0 1px 2px rgba(20,26,38,.05);
  --shadow:0 2px 10px rgba(20,26,38,.06);
  --shadow-lg:0 10px 34px rgba(20,26,38,.10);

  --r-sm:10px; --r:14px; --r-lg:16px;
  --header-h:70px;
  --wrap:1420px;

  /* accent-at-alpha fills, for chips and icon tiles */
  --soft-cyan:rgba(1,195,255,.11);
  --soft-orange:rgba(255,74,1,.10);
  --soft-green:rgba(3,169,9,.10);
  --soft-yellow:rgba(254,218,0,.20);

  /* level stage colours map onto the brand accents:
     green = Level 1 exploration, cyan = Level 2 inquiry, orange = Level 3 readiness */
  --foundation:var(--k-green);
  --conceptual:var(--k-cyan);
  --advanced:var(--k-orange);

  --ff:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --ff-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{
  background:var(--white);
  color:var(--ink);
  font-family:var(--ff);
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5{margin:0;font-weight:650;letter-spacing:-.015em;color:var(--ink)}
h1{font-size:clamp(27px,3.6vw,44px);line-height:1.1;letter-spacing:-.032em}
h2{font-size:clamp(23px,2.4vw,29px);letter-spacing:-.028em}
h3{font-size:17.5px;letter-spacing:-.02em}
h4{font-size:15px;letter-spacing:-.015em;line-height:1.3}
.h4{font-size:15px;letter-spacing:-.015em;line-height:1.3}
.h5{font-size:14px}
p{margin:0;color:var(--ink-2)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
strong,b{color:var(--ink);font-weight:600}
table{border-collapse:collapse}
::selection{background:rgba(1,195,255,.22)}
:focus-visible{outline:2px solid var(--k-cyan);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--white);color:var(--ink);
  padding:12px 18px;border-radius:0 0 10px 0;font-weight:600;box-shadow:var(--shadow)}
.skip:focus,.skip:focus-visible{left:0}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:9px;border:3px solid #fff}

/* ---------- primitives ---------------------------------------------------- */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 34px}
.brandline{height:2.5px;background:var(--brand-line);opacity:.9}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:11.5px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:18px}
.eyebrow.strong{color:var(--ink-2);font-weight:650;letter-spacing:.15em}
.lead{font-size:16.5px;line-height:1.6;color:var(--ink-2);max-width:62ch}
.mono{font-family:var(--ff-mono);font-size:.9em}
.sect{padding:74px 0}
.sect.tight{padding:52px 0}
.sect.pale{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sect.white{background:var(--white)}
.sect-head{max-width:70ch;margin-bottom:34px}
.sect-head p{margin-top:11px;font-size:15.5px}
.center{text-align:center;margin-left:auto;margin-right:auto}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g6{grid-template-columns:repeat(6,minmax(0,1fr))}

/* cards: white, 1px cool-grey border, accent rule revealed on hover */
.card{position:relative;background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 18px 18px;overflow:hidden;transition:transform .18s,box-shadow .18s,border-color .18s}
.card:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--accent,var(--k-cyan));opacity:0;transition:opacity .18s}
a.card:hover,.card.lift:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
a.card:hover:before,.card.lift:hover:before{opacity:1}
.card.flat{background:var(--bg-soft-2)}
.card.ruled:before{opacity:1;height:3px}
.card h3,.card h4,.card .h4{margin-bottom:7px}
.card p{font-size:13.5px;line-height:1.55}
a.card{display:block}
.acc-c{--accent:var(--k-cyan)}   .acc-o{--accent:var(--k-orange)}
.acc-g{--accent:var(--k-green)}  .acc-y{--accent:var(--k-yellow)}

.ic{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  flex:none;margin-bottom:11px}
.ic svg{width:17px;height:17px}
.ic.c{background:var(--soft-cyan);color:var(--k-cyan-deep)}
.ic.o{background:var(--soft-orange);color:var(--k-orange-deep)}
.ic.g{background:var(--soft-green);color:var(--k-green-deep)}
.ic.y{background:var(--soft-yellow);color:var(--k-amber-deep)}

/* chips / pills */
.chip{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:550;
  color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);
  padding:4px 10px;border-radius:99px;white-space:nowrap}
.chip.foundation{background:var(--soft-green);border-color:rgba(3,169,9,.28);color:var(--k-green-deep);font-weight:600}
.chip.conceptual{background:var(--soft-cyan);border-color:rgba(1,195,255,.32);color:var(--k-cyan-deep);font-weight:600}
.chip.advanced{background:var(--soft-orange);border-color:rgba(255,74,1,.26);color:var(--k-orange-deep);font-weight:600}
.chip.yellow{background:var(--soft-yellow);border-color:rgba(254,218,0,.55);color:var(--k-amber-deep);font-weight:600}
.chip.gray{background:var(--bg-soft);color:var(--ink-2)}
.chips{display:flex;flex-wrap:wrap;gap:8px}

/* buttons: dark ink primary, white bordered secondary */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;
  padding:0 22px;border-radius:11px;font-size:14.5px;font-weight:600;border:1px solid transparent;
  transition:transform .16s,box-shadow .16s,border-color .16s,background .16s;text-align:center}
.btn svg{width:16px;height:16px;flex:none}
.btn:hover{transform:translateY(-1px)}
.btn-pri{background:var(--ink);color:#fff}
.btn-pri:hover{box-shadow:0 8px 22px rgba(20,26,38,.2)}
.btn-out{background:var(--white);color:var(--ink);border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.btn-out:hover{box-shadow:var(--shadow)}
/* the demo portal's "Open LMS" treatment: white, with a brand-rule left edge */
.btn-acc{position:relative;background:var(--white);color:var(--ink);border-color:var(--line-2);
  box-shadow:var(--shadow-sm);overflow:hidden;padding-left:26px}
.btn-acc:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-line)}
.btn-acc:hover{box-shadow:var(--shadow)}
.btn-acc.sm{padding-left:18px}
.btn-quiet,.btn-ghost-dark{background:transparent;color:var(--ink-2);border-color:var(--line);padding:0 18px}
.btn-quiet:hover,.btn-ghost-dark:hover{color:var(--ink);background:var(--bg-soft)}
.btn.sm{min-height:36px;padding:0 14px;font-size:13px;border-radius:9px;font-weight:550}
.btns{display:flex;flex-wrap:wrap;gap:11px}

.rule{height:1px;background:var(--line);border:0;margin:22px 0}
.kv{display:flex;flex-direction:column;gap:2px}
.kv b{font-size:24px;font-weight:650;color:var(--ink);letter-spacing:-.026em;line-height:1.15}
.kv span{font-size:10.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
.ticklist li{position:relative;padding-left:24px;margin-bottom:10px;font-size:14px;color:var(--ink-2);line-height:1.55}
.ticklist li:last-child{margin-bottom:0}
.ticklist li:before{content:"";position:absolute;left:0;top:6px;width:14px;height:14px;border-radius:50%;
  background:var(--soft-green);box-shadow:inset 0 0 0 1px rgba(3,169,9,.32)}
.ticklist li:after{content:"";position:absolute;left:4.4px;top:10.2px;width:6px;height:3.2px;
  border-left:1.7px solid var(--k-green-deep);border-bottom:1.7px solid var(--k-green-deep);
  transform:rotate(-45deg)}
.deflist{display:grid;gap:13px}
.deflist>div{border-left:2px solid var(--line);padding-left:14px}
.deflist b{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:2px}
.deflist span{display:block;font-size:13.5px;color:var(--ink-2);line-height:1.55}
.note{font-size:12px;color:var(--ink-3);line-height:1.55}
.note b{color:var(--ink-2);font-weight:600}
.tag{font-size:10.5px;font-weight:650;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3)}

/* ---------- header ------------------------------------------------------- */
.hdr{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.hdr-in{max-width:var(--wrap);margin:0 auto;padding:0 34px;height:var(--header-h);
  display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:13px;padding:4px 0;flex:none}
.brand img{height:40px;width:auto;display:block}
.brand .bn{display:flex;flex-direction:column;line-height:1.15;
  border-left:1px solid var(--line-2);padding-left:13px}
.brand .bn b{font-size:14.5px;font-weight:650;letter-spacing:-.01em;color:var(--ink)}
.brand .bn span{font-size:11px;font-weight:500;color:var(--ink-3);letter-spacing:.07em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav>li{position:relative}
.nav .navlink{display:inline-flex;align-items:center;gap:5px;padding:9px 13px;border-radius:9px;
  font-size:13.5px;font-weight:550;color:var(--ink-2);cursor:pointer;white-space:nowrap;
  transition:background .16s,color .16s;position:relative}
.nav .navlink:hover{background:var(--bg-soft);color:var(--ink)}
.nav>li.on>.navlink{color:var(--ink);background:var(--bg-soft)}
.nav>li.on>.navlink:after{content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  border-radius:2px;background:var(--brand-line)}
.nav .navlink .car{width:9px;height:9px;opacity:.55;transition:transform .16s}
.nav>li.open .navlink .car{transform:rotate(180deg)}
.drop{position:absolute;top:calc(100% + 9px);left:0;min-width:266px;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);
  padding:8px;display:none;overflow:hidden}
.nav>li.open .drop{display:block}
.drop a{display:block;padding:9px 11px;border-radius:var(--r-sm);transition:background .14s}
.drop a:hover{background:var(--bg-soft-2)}
.drop a b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);letter-spacing:-.008em}
.drop a span{display:block;font-size:11.5px;color:var(--ink-3);margin-top:2px}
.hdr-cta{margin-left:auto;display:flex;align-items:center;gap:9px;flex:none}
.burger{display:none;width:40px;height:40px;border-radius:9px;border:1px solid var(--line);
  align-items:center;justify-content:center;background:var(--white)}
.burger span{display:block;width:16px;height:1.6px;background:var(--ink);position:relative}
.burger span:before,.burger span:after{content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--ink)}
.burger span:before{top:-5px}.burger span:after{top:5px}
.hdr-line{height:2.5px;background:var(--brand-line);opacity:.9}
.mobnav{display:none;border-top:1px solid var(--line);background:var(--white);
  max-height:calc(100vh - var(--header-h));overflow:auto;padding:12px 22px 26px}
.mobnav.on{display:block}
.mobnav .mgroup{font-size:10.5px;font-weight:650;letter-spacing:.13em;text-transform:uppercase;
  color:var(--ink-3);padding:16px 0 6px}
.mobnav a{display:block;padding:10px 0;font-size:14.5px;color:var(--ink-2);border-bottom:1px solid var(--line)}
.mobnav a:hover{color:var(--ink)}
.mobnav .btns{margin-top:20px}
.mobnav .btns .btn{flex:1}

/* ---------- hero: white, with blurred brand colour washes ---------------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--white)}
.hero-wash{position:absolute;inset:0;pointer-events:none}
.hero-wash i{position:absolute;display:block;border-radius:50%;filter:blur(56px)}
.hero-wash i.a{width:420px;height:420px;background:var(--k-cyan);right:-60px;top:-140px}
.hero-wash i.b{width:340px;height:340px;background:var(--k-yellow);right:210px;top:60px}
.hero-wash i.c{width:300px;height:300px;background:var(--k-orange);right:-30px;bottom:-150px}
.hero-wash i.d{width:300px;height:300px;background:var(--k-green);left:-100px;bottom:-140px}
/* Single-column heroes expose the whole wash, so it reads as a tint. The
   split (two-column) hero has content over the right-hand side, so it can
   carry the demo portal's full wash strength. */
.hero-wash i.a{opacity:.10} .hero-wash i.b{opacity:.09}
.hero-wash i.c{opacity:.08} .hero-wash i.d{opacity:.07}
.hero.split .hero-wash i.a{opacity:.24} .hero.split .hero-wash i.b{opacity:.20}
.hero.split .hero-wash i.c{opacity:.16} .hero.split .hero-wash i.d{opacity:.13}
.hero .wrap{position:relative;z-index:2;padding-top:60px;padding-bottom:64px}
.hero.slim .wrap{padding-top:44px;padding-bottom:46px}
.hero h1 .a1{color:var(--k-orange-deep)}
.hero h1 .a2{color:var(--k-cyan-deep)}
.hero p.lead{margin:20px 0 0;max-width:58ch}
.hero .btns{margin-top:30px}
.hero-cols{position:relative;display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:46px;align-items:center}
.verified{display:inline-flex;align-items:center;gap:10px;font-size:12px;color:var(--ink-3);
  border:1px solid var(--line);background:rgba(255,255,255,.7);border-radius:99px;
  padding:7px 14px;margin-bottom:20px;font-weight:550}
.verified img{height:20px;width:auto}
.hero-pills{display:flex;gap:8px;flex-wrap:wrap;margin-top:26px}
.hero-pills .hp{background:var(--bg-soft);border:1px solid var(--line);padding:6px 13px;
  border-radius:99px;font-size:12.5px;font-weight:550;color:var(--ink-2)}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:30px;padding-top:24px;
  border-top:1px solid var(--line)}
.hero-stats .s b{display:block;font-size:26px;font-weight:650;color:var(--ink);
  letter-spacing:-.028em;line-height:1.15}
.hero-stats .s span{display:block;font-size:10.5px;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.heroshot{position:relative;background:rgba(255,255,255,.92);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:12px;box-shadow:0 14px 40px rgba(20,26,38,.10);
  backdrop-filter:blur(4px);overflow:hidden}
.heroshot:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-line)}
.heroshot img{border-radius:10px;width:100%;border:1px solid var(--line)}
.heroshot .cap{padding:11px 4px 2px;font-size:11.5px;color:var(--ink-3)}
.hero-books{display:flex;gap:12px;justify-content:center;align-items:flex-end;margin-top:18px}
.hero-books img{width:31%;border-radius:8px;border:1px solid var(--line);
  box-shadow:0 12px 30px rgba(20,26,38,.14)}
.hero-books img:nth-child(2){width:36%;margin-bottom:14px}
.hero-crumb{display:flex;gap:8px;align-items:center;font-size:12.5px;color:var(--ink-3);
  margin-bottom:16px;flex-wrap:wrap}
.hero-crumb a{color:var(--ink-2)}
.hero-crumb a:hover{color:var(--k-cyan-deep)}
.hero-crumb .sep{opacity:.5}

/* ---------- footer ------------------------------------------------------- */
.ftr{border-top:1px solid var(--line);background:var(--bg-soft-2)}
.ftr .wrap{padding-top:40px;padding-bottom:26px}
.ftr h2{font-size:11px;font-weight:650;letter-spacing:.13em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:12px}
.ftr-cols{display:grid;grid-template-columns:1.6fr repeat(4,minmax(0,1fr));gap:32px}
.ftr a{display:block;font-size:13.5px;padding:5px 0;color:var(--ink-2)}
.ftr a:hover{color:var(--ink)}
.ftr .fbrand img{height:52px;margin-bottom:14px}
.ftr .fbrand p{font-size:13px;color:var(--ink-2);max-width:36ch;line-height:1.6}
.ftr-seal{display:flex;align-items:center;gap:11px;margin-top:18px}
.ftr-seal img{height:48px;width:auto}
.ftr-seal span{font-size:11.5px;color:var(--ink-3);max-width:22ch;line-height:1.45}
.ftr-btm{margin-top:34px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:12px;color:var(--ink-3)}

/* ---------- model cards (Standard vs Modular) ---------------------------- */
.modelcards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.modelcard{position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px 24px;box-shadow:var(--shadow-sm);
  display:flex;flex-direction:column;overflow:hidden;
  transition:transform .2s,box-shadow .2s,border-color .2s}
.modelcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.modelcard:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-line)}
.modelcard h3{font-size:22px;letter-spacing:-.026em;margin:7px 0 8px}
.modelcard .mm{font-size:10.5px;font-weight:650;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3)}
.modelcard .btns{margin-top:auto;padding-top:20px}
.timeline{margin:20px 0 6px}
.tl-row{display:flex;align-items:stretch;gap:4px;margin-bottom:8px}
.tl-lab{width:78px;flex:none;font-size:10.5px;font-weight:600;letter-spacing:.05em;
  color:var(--ink-3);display:flex;align-items:center;text-transform:uppercase}
.tl-bar{flex:1;display:flex;gap:3px;height:34px}
.tl-seg{flex:1;border-radius:8px;display:flex;align-items:center;justify-content:center;
  font-size:11px;font-weight:600;text-align:center;padding:0 5px;line-height:1.2}
.tl-seg.core{background:var(--soft-green);color:var(--k-green-deep);box-shadow:inset 0 0 0 1px rgba(3,169,9,.26)}
.tl-seg.corec{background:var(--soft-cyan);color:var(--k-cyan-deep);box-shadow:inset 0 0 0 1px rgba(1,195,255,.3)}
.tl-seg.el{background:var(--soft-orange);color:var(--k-orange-deep);box-shadow:inset 0 0 0 1px rgba(255,74,1,.24)}
.tl-seg.full{background:var(--bg-soft);color:var(--ink-3);box-shadow:inset 0 0 0 1px var(--line)}
.tl-scale{display:flex;gap:3px;margin-left:82px;margin-top:2px}
.tl-scale span{flex:1;text-align:center;font-size:10px;color:var(--ink-3)}

/* ---------- grade journey ------------------------------------------------ */
.journey{overflow-x:auto;padding-bottom:10px;-webkit-overflow-scrolling:touch}
.journey-track,.jstage{display:grid;grid-template-columns:repeat(12,minmax(126px,1fr));gap:10px;min-width:900px}
.jstage{margin-bottom:8px}
.jstage .js{border-radius:8px;height:26px;display:flex;align-items:center;justify-content:center;
  font-size:10.5px;font-weight:650;letter-spacing:.08em;text-transform:uppercase}
.js.foundation{background:var(--soft-green);color:var(--k-green-deep)}
.js.conceptual{background:var(--soft-cyan);color:var(--k-cyan-deep)}
.js.advanced{background:var(--soft-orange);color:var(--k-orange-deep)}
.gcard{position:relative;display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r);padding:14px;overflow:hidden;min-height:148px;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.gcard:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;opacity:0;transition:opacity .18s}
.gcard.foundation:before{background:var(--k-green)}
.gcard.conceptual:before{background:var(--k-cyan)}
.gcard.advanced:before{background:var(--k-orange)}
.gcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.gcard:hover:before{opacity:1}
.gcard .gn{font-size:10.5px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;margin-bottom:7px}
.gcard.foundation .gn{color:var(--k-green-deep)}
.gcard.conceptual .gn{color:var(--k-cyan-deep)}
.gcard.advanced .gn{color:var(--k-orange-deep)}
.gcard b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.28;
  letter-spacing:-.012em;margin-bottom:6px}
.gcard small{display:block;font-size:11.5px;color:var(--ink-3);line-height:1.45;margin-top:auto}

/* ---------- feature grid ------------------------------------------------- */
.eco{display:grid;grid-template-columns:repeat(auto-fill,minmax(196px,1fr));gap:16px}
.ecoi{position:relative;background:var(--white);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 18px 18px;overflow:hidden;transition:transform .18s,box-shadow .18s,border-color .18s}
.ecoi:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--accent,var(--k-cyan));opacity:0;transition:opacity .18s}
.ecoi:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.ecoi:hover:before{opacity:1}
.ecoi b{display:block;font-size:15px;font-weight:600;color:var(--ink);margin-bottom:5px;letter-spacing:-.015em}
.ecoi span{font-size:13px;color:var(--ink-2);line-height:1.55}

/* ---------- metric band ------------------------------------------------- */
.metricband{display:grid;grid-template-columns:repeat(auto-fit,minmax(146px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.metricband .m{background:var(--white);padding:20px 18px}
.metricband .m b{display:block;font-size:26px;font-weight:650;color:var(--ink);
  letter-spacing:-.028em;line-height:1.15}
.metricband .m span{display:block;font-size:10.5px;font-weight:600;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-3);margin-top:4px}

/* ---------- filters + explorer ------------------------------------------ */
.filters{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow-sm);
  margin-bottom:26px}
.fgroup{display:flex;flex-direction:column;gap:7px;min-width:0}
.fgroup>label{font-size:10.5px;font-weight:650;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-3)}
.fpills{display:flex;flex-wrap:wrap;gap:6px}
.fpill{border:1px solid var(--line);background:var(--white);border-radius:99px;padding:6px 13px;
  font-size:12.5px;font-weight:550;color:var(--ink-2);transition:border-color .16s,color .16s,box-shadow .16s}
.fpill:hover{border-color:var(--line-2);color:var(--ink)}
.fpill[aria-pressed="true"]{color:var(--ink);font-weight:600;border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.fpill[aria-pressed="true"]:after{content:"";width:6px;height:6px;border-radius:50%;
  background:var(--k-cyan);display:inline-block;margin-left:7px;vertical-align:middle}
.fcount{margin-left:auto;font-size:12.5px;color:var(--ink-3);padding-bottom:6px}
select,input[type=text],input[type=email],textarea{
  font-size:14px;color:var(--ink);background:var(--white);border:1px solid var(--line);
  border-radius:10px;padding:10px 12px;width:100%;min-height:44px;transition:border-color .16s,box-shadow .16s}
textarea{min-height:104px;resize:vertical}
select:focus,input:focus,textarea:focus{outline:none;border-color:var(--k-cyan);
  box-shadow:0 0 0 3px rgba(1,195,255,.14)}

/* ---------- elective cards ---------------------------------------------- */
.elgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:20px}
.elcard{position:relative;display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.elcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.elcard .cov{aspect-ratio:3/4;background:var(--bg-soft);overflow:hidden;border-bottom:1px solid var(--line)}
.elcard .cov img{width:100%;height:100%;object-fit:cover}
.elcard .bd{padding:16px 16px 18px;display:flex;flex-direction:column;flex:1}
.elcard .bd h3{font-size:16px;margin-bottom:6px}
.elcard .bd p{font-size:13px;margin-bottom:12px}
.elcard .bd .chips{margin-top:auto}
.elnum{display:block;font-size:10.5px;font-weight:650;letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:5px}

/* ---------- book grid --------------------------------------------------- */
.bookgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(172px,1fr));gap:22px}
.book{display:flex;flex-direction:column;gap:8px}
.book .cov{aspect-ratio:3/4;border-radius:10px;overflow:hidden;background:var(--bg-soft);
  border:1px solid var(--line);box-shadow:0 8px 24px rgba(20,26,38,.10)}
.book .cov img{width:100%;height:100%;object-fit:cover}
.book b{font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.35;letter-spacing:-.012em}
.book small{display:block;font-size:11.5px;color:var(--ink-3)}
.book .isbn{font-family:var(--ff-mono);font-size:10.5px;color:var(--ink-3)}

/* ---------- screenshot cards -------------------------------------------- */
.shots{display:grid;grid-template-columns:repeat(auto-fill,minmax(304px,1fr));gap:20px}
.shot{background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:box-shadow .18s,border-color .18s}
.shot:hover{box-shadow:var(--shadow);border-color:var(--line-2)}
.shot .im{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.shot .im img{width:100%}
.shot .bd{padding:15px 16px 17px}
.shot .bd b{display:block;font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:4px;letter-spacing:-.014em}
.shot .bd span{font-size:13px;color:var(--ink-2);line-height:1.55}
.shotwide{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:28px;align-items:center}
.shotwide.rev{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr)}
.frame{position:relative;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  background:var(--white);box-shadow:var(--shadow)}
.frame img{width:100%}
.frame .cap{padding:11px 14px;font-size:12px;color:var(--ink-3);border-top:1px solid var(--line);
  background:var(--bg-soft-2)}

/* ---------- accordion / tabs -------------------------------------------- */
.acc{border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--white)}
.acc+.acc{margin-top:12px}
.acc>button{width:100%;display:flex;align-items:center;gap:14px;padding:15px 18px;text-align:left;
  transition:background .14s}
.acc>button:hover{background:var(--bg-soft-2)}
.acc>button .an{flex:none;font-size:10.5px;font-weight:650;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3)}
.acc>button .at{flex:1;font-size:15px;font-weight:600;color:var(--ink);letter-spacing:-.014em}
.acc>button .ax{flex:none;width:11px;height:11px;color:var(--ink-3);transition:transform .2s}
.acc.open>button .ax{transform:rotate(180deg)}
.acc.open>button{background:var(--bg-soft-2)}
.acc .body{display:none;padding:4px 18px 20px;border-top:1px solid var(--line)}
.acc.open .body{display:block}
.tabs{display:inline-flex;padding:4px;background:var(--bg-soft);border-radius:11px;
  border:1px solid var(--line);gap:3px;margin-bottom:24px;max-width:100%;overflow-x:auto}
.tabs button{padding:8px 15px;border-radius:8px;font-size:13.5px;font-weight:550;color:var(--ink-2);
  white-space:nowrap;transition:background .14s,color .14s,box-shadow .14s}
.tabs button:hover{color:var(--ink)}
.tabs button[aria-selected="true"]{background:var(--white);color:var(--ink);font-weight:600;
  box-shadow:var(--shadow-sm)}

/* ---------- lesson list ------------------------------------------------- */
.lessons{display:grid;gap:9px}
.lrow{display:flex;gap:14px;padding:13px 15px;border:1px solid var(--line);
  border-radius:var(--r-sm);background:var(--white)}
.lrow:hover{background:var(--bg-soft-2)}
.lrow .ln{flex:none;width:28px;padding-top:2px;font-size:11px;font-weight:650;color:var(--ink-3)}
.lrow .lb{min-width:0}
.lrow .lb b{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:3px;letter-spacing:-.012em}
.lrow .lb p{font-size:13px;margin-bottom:6px;line-height:1.55}
.lrow .lb .meta{font-size:11.5px;color:var(--ink-3)}
.catbar{display:flex;gap:5px;margin-top:8px;flex-wrap:wrap}
.catbar .cb{font-size:10.5px;font-weight:600;padding:2px 8px;border-radius:99px;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-2)}

/* ---------- table ------------------------------------------------------- */
.tblwrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);
  background:var(--white);max-width:100%}
table{width:100%;font-size:13.5px;min-width:min(620px,100%)}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:10.5px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);
  background:var(--bg-soft-2);position:sticky;top:0}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:var(--bg-soft-2)}
td b{color:var(--ink);font-weight:600}

/* ---------- CTA band: light panel with the brand rule ------------------- */
.ctaband{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--white);box-shadow:var(--shadow);padding:38px 38px 40px}
.ctaband:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-line)}
.ctaband .wash{position:absolute;inset:0;pointer-events:none}
.ctaband .wash i{position:absolute;display:block;border-radius:50%;filter:blur(52px);opacity:.16}
.ctaband .wash i.a{width:300px;height:300px;background:var(--k-cyan);right:-40px;top:-120px}
.ctaband .wash i.b{width:260px;height:260px;background:var(--k-yellow);right:190px;bottom:-150px;opacity:.14}
.ctaband>.inner{position:relative;z-index:2}
.ctaband h2{max-width:26ch}
.ctaband p{margin:12px 0 24px;max-width:58ch;font-size:15.5px}

/* ---------- placeholders ------------------------------------------------ */
.asset-placeholder{position:relative;background:
    repeating-linear-gradient(135deg,var(--bg-soft),var(--bg-soft) 11px,#EDEFF3 11px,#EDEFF3 22px);
  border:1px dashed var(--line-2);border-radius:var(--r);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;padding:22px;text-align:center;min-height:150px}
.asset-placeholder .ph-t{font-size:10.5px;font-weight:650;letter-spacing:.11em;
  text-transform:uppercase;color:var(--ink-3)}
.asset-placeholder .ph-n{font-family:var(--ff-mono);font-size:11px;color:var(--ink-2);word-break:break-all}

/* ---------- modal ------------------------------------------------------- */
.mbk{position:fixed;inset:0;z-index:120;background:rgba(23,28,36,.40);display:none;
  padding:64px 20px 24px;overflow-y:auto}
.mbk.on{display:block}
.modal{width:100%;max-width:1000px;margin:0 auto;background:var(--white);border:1px solid var(--line);
  border-radius:18px;box-shadow:0 28px 80px rgba(15,20,30,.30);overflow:hidden}
.modal:before{content:"";display:block;height:3px;background:var(--brand-line)}
.modal-hd{padding:24px 30px 20px;border-bottom:1px solid var(--line);
  display:flex;align-items:flex-start;gap:18px}
.modal-hd h2{flex:1;font-size:24px;letter-spacing:-.026em}
.modal-hd .x{margin-left:auto;flex:none;display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:9px;border:1px solid var(--line);color:var(--ink-2);
  background:var(--white)}
.modal-hd .x:hover{border-color:var(--line-2);color:var(--ink);box-shadow:var(--shadow-sm)}
.modal-hd .x svg{width:14px;height:14px}
.modal-bd{padding:24px 30px 28px}

/* ---------- forms ------------------------------------------------------- */
.formcard{position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 26px 28px;box-shadow:var(--shadow-sm);overflow:hidden}
.formcard:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-line)}
.frow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:16px}
.f1{grid-template-columns:minmax(0,1fr)}
.field label{display:block;font-size:10.5px;font-weight:650;letter-spacing:.08em;
  color:var(--ink-2);margin-bottom:6px;text-transform:uppercase}
.field .req{color:var(--k-orange-deep)}
.formnote{background:var(--soft-yellow);border:1px solid rgba(254,218,0,.55);border-radius:var(--r-sm);
  padding:12px 14px;font-size:13px;color:var(--k-amber-deep);margin-bottom:20px;line-height:1.55}
.formok{background:var(--soft-green);border:1px solid rgba(3,169,9,.32);border-radius:var(--r-sm);
  padding:14px 16px;font-size:14px;color:var(--k-green-deep);line-height:1.6}

/* ---------- RTL (Arabic edition blocks) --------------------------------- */
[dir="rtl"]{text-align:right}
[dir="rtl"] .ticklist li{padding-left:0;padding-right:24px}
[dir="rtl"] .ticklist li:before{left:auto;right:0}
[dir="rtl"] .ticklist li:after{left:auto;right:4.4px}
[dir="rtl"] .deflist>div{border-left:0;border-right:2px solid var(--line);padding-left:0;padding-right:14px}
.ar{font-size:1.16em;line-height:1.85}

/* ---------- responsive -------------------------------------------------- */
@media (max-width:1180px){
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .g6{grid-template-columns:repeat(3,minmax(0,1fr))}
  .ftr-cols{grid-template-columns:1.4fr repeat(2,minmax(0,1fr))}
  /* free header width for the full nav: drop the secondary CTA, then the wordmark */
  .hdr-cta .btn-out{display:none}
  .brand .bn{display:none}
  .nav .navlink{padding:9px 11px;font-size:13px}
  .hdr-in{gap:14px}
}
@media (max-width:980px){
  .nav{display:none}
  .burger{display:flex}
  .hero-cols{grid-template-columns:minmax(0,1fr);gap:30px}
  .shotwide,.shotwide.rev{grid-template-columns:minmax(0,1fr)}
  .modelcards{grid-template-columns:minmax(0,1fr)}
  .g3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .wrap,.hdr-in{padding:0 22px}
  .sect{padding:54px 0}
  .ctaband{padding:30px 26px 32px}
  .modal{max-width:640px}
}
@media (max-width:640px){
  body{font-size:14.5px}
  .g2,.g3,.g4,.g6{grid-template-columns:minmax(0,1fr)}
  .ftr-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .frow{grid-template-columns:minmax(0,1fr)}
  .wrap,.hdr-in{padding:0 16px}
  .hero .wrap{padding-top:40px;padding-bottom:46px}
  .hero-stats{gap:22px}
  .hero-stats .s b{font-size:22px}
  .sect{padding:44px 0}
  .metricband{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bookgrid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .elgrid{grid-template-columns:minmax(0,1fr)}
  .mbk{padding:16px 12px}
  .modal-hd,.modal-bd{padding:20px}
  .filters{padding:14px}
  .ctaband{padding:24px 20px 26px}
  .modelcard{padding:22px 20px 20px}
  .tl-lab{width:58px;font-size:9.5px}
  .tl-scale{margin-left:62px}
  table{min-width:520px}
  .hero .btns .btn,.ctaband .btns .btn{width:100%}
}
@media (max-width:420px){
  .hdr-in{gap:10px}
  .hdr-cta{gap:7px}
  .hdr-cta .btn.sm{padding:0 12px;font-size:12.5px}
  .wrap,.hdr-in{padding:0 14px}
}
@media print{
  .hdr,.hdr-line,.mobnav,.ftr,.btns,.ctaband,.hero-wash{display:none}
  .hero{border-bottom:0}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
  a.card:hover,.card.lift:hover,.ecoi:hover,.gcard:hover,.elcard:hover,.modelcard:hover,.btn:hover{transform:none}
}

/* ==========================================================================
   SOCIAL SCIENCE COMPONENTS
   New below this line. Built only from the primitives above.
   ========================================================================== */

/* ---------- header: six nav groups --------------------------------------- */
/* Same header height and components as ICT/KG; only the widths at which the
   optional parts shed move. Verified clear of horizontal overflow at
   1600 / 1440 / 1280 / 1180 / 1024 / 768 / 390 / 320. */
.nav .navlink{padding:9px 12px;font-size:13px}
@media (max-width:1360px){ .brand .bn{display:none} }
@media (max-width:1200px){ .hdr-cta .btn-out{display:none} }

/* ---------- edition (variant) cards -------------------------------------- */
.edcards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.edcard{position:relative;display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px 24px;
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .2s,box-shadow .2s,border-color .2s}
.edcard:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.edcard:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--brand-line)}
.edcard .em{font-size:10.5px;font-weight:650;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3)}
.edcard h3{font-size:22px;letter-spacing:-.026em;margin:7px 0 9px}
.edcard>p{font-size:14px;line-height:1.6}
.edcard .edstats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow:hidden;margin:20px 0 4px}
.edcard .edstats .s{background:var(--bg-soft-2);padding:12px 10px}
.edcard .edstats b{display:block;font-size:19px;font-weight:650;color:var(--ink);
  letter-spacing:-.026em;line-height:1.15}
.edcard .edstats span{display:block;font-size:9.5px;font-weight:600;letter-spacing:.08em;
  text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.edcard .btns{margin-top:auto;padding-top:20px}
.edcard .edcov{display:flex;gap:9px;margin:18px 0 0;align-items:flex-end}
.edcard .edcov img{width:60px;border-radius:6px;border:1px solid var(--line);
  box-shadow:0 6px 16px rgba(20,26,38,.13)}

/* ---------- grade rail (12 grades, two bands) ---------------------------- */
.railwrap{overflow-x:auto;padding-bottom:10px;-webkit-overflow-scrolling:touch}
.railband,.railtrack{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));
  gap:9px;min-width:1180px}
.railband{margin-bottom:8px}
.railband .rb{border-radius:8px;height:26px;display:flex;align-items:center;justify-content:center;
  font-size:10.5px;font-weight:650;letter-spacing:.08em;text-transform:uppercase}
.rb.junior{background:var(--soft-green);color:var(--k-green-deep)}
.rb.middle{background:var(--soft-cyan);color:var(--k-cyan-deep)}
.rb.senior{background:var(--soft-orange);color:var(--k-orange-deep)}
.gcard .gmeta{display:block;font-size:10.5px;color:var(--ink-3);margin-top:6px}

/* ---------- strand rail --------------------------------------------------- */
.strands{display:grid;gap:14px}
.strand{position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);padding:20px 20px 18px;overflow:hidden;
  transition:box-shadow .18s,border-color .18s}
.strand:hover{box-shadow:var(--shadow);border-color:var(--line-2)}
.strand:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--accent,var(--k-cyan))}
.strand .sh{display:flex;align-items:center;gap:12px;margin-bottom:9px}
.strand h3{font-size:16.5px;letter-spacing:-.018em}
.strand p{font-size:13.5px;line-height:1.6;max-width:74ch}
.steps{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px;align-items:center}
.steps .st{display:inline-flex;align-items:center;font-size:11.5px;font-weight:550;
  color:var(--ink-2);background:var(--bg-soft);border:1px solid var(--line);
  padding:5px 11px;border-radius:99px;white-space:nowrap}
.steps .ar{width:12px;height:8px;color:var(--ink-3);flex:none}

/* ---------- cognition element cards -------------------------------------- */
.cogband{margin-bottom:26px}
.cogband:last-child{margin-bottom:0}
.cogband .cbh{display:flex;align-items:baseline;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.cogband .cbh b{font-size:15.5px;font-weight:650;color:var(--ink);letter-spacing:-.018em}
.coggrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(238px,1fr));gap:14px}
.cog{position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);padding:16px 16px 15px;overflow:hidden;
  transition:box-shadow .18s,border-color .18s}
.cog:hover{box-shadow:var(--shadow);border-color:var(--line-2)}
.cog:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--accent,var(--k-cyan))}
.cog b{display:block;font-size:14px;font-weight:600;color:var(--ink);letter-spacing:-.014em;
  margin-bottom:4px}
.cog .cs{display:block;font-size:10.5px;font-weight:600;letter-spacing:.06em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:8px;line-height:1.4}
.cog p{font-size:12.5px;line-height:1.55}

/* ---------- unit / lesson tree ------------------------------------------- */
.utree{display:grid;gap:12px}
.unit{border:1px solid var(--line);border-radius:var(--r);background:var(--white);overflow:hidden}
.unit>.uh{display:flex;align-items:center;gap:14px;padding:14px 18px;background:var(--bg-soft-2);
  border-bottom:1px solid var(--line)}
.unit>.uh .un{flex:none;font-size:10.5px;font-weight:650;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3)}
.unit>.uh .ut{flex:1;font-size:15px;font-weight:600;color:var(--ink);letter-spacing:-.014em}
.unit>.uh .uc{flex:none;font-size:11.5px;color:var(--ink-3)}
.unit .ul{padding:6px 0}
.lrow2{display:flex;gap:14px;padding:12px 18px;border-bottom:1px solid var(--line)}
.lrow2:last-child{border-bottom:0}
.lrow2:hover{background:var(--bg-soft-2)}
.lrow2 .ln{flex:none;width:26px;font-family:var(--ff-mono);font-size:11px;color:var(--ink-3);
  padding-top:2px}
.lrow2 .lbd{flex:1;min-width:0}
.lrow2 .lbd b{display:block;font-size:14px;font-weight:600;color:var(--ink);
  letter-spacing:-.012em;margin-bottom:3px}
.lrow2 .lbd p{font-size:12.5px;line-height:1.55;margin-bottom:7px}
.lrow2 .code{display:inline-block;font-family:var(--ff-mono);font-size:10.5px;color:var(--ink-3);
  background:var(--bg-soft);border:1px solid var(--line);padding:2px 7px;border-radius:5px}
.vocab{display:flex;flex-wrap:wrap;gap:5px;margin-top:7px}
.vocab span{font-size:10.5px;color:var(--ink-2);background:var(--bg-soft);
  border:1px solid var(--line);padding:2px 8px;border-radius:99px}
.linkrow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:10px}
.linkrow div{font-size:11.5px;color:var(--ink-2);line-height:1.5;
  border-left:2px solid var(--line);padding-left:10px}
.linkrow div b{display:block;font-size:9.5px;font-weight:650;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:2px}

/* ---------- sample-page gallery + lightbox ------------------------------- */
.samples{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:20px}
.sample{display:flex;flex-direction:column;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);overflow:hidden;text-align:left;padding:0;width:100%;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.sample:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.sample .im{position:relative;background:var(--bg-soft);border-bottom:1px solid var(--line);
  aspect-ratio:612/792;max-height:340px;overflow:hidden}
.sample .im img{width:100%;height:100%;object-fit:cover;object-position:top center}
.sample .zoom{position:absolute;right:9px;bottom:9px;width:30px;height:30px;border-radius:9px;
  background:rgba(255,255,255,.94);border:1px solid var(--line-2);display:flex;align-items:center;
  justify-content:center;color:var(--ink-2);backdrop-filter:blur(3px)}
.sample .zoom svg{width:14px;height:14px}
.sample .bd{padding:15px 16px 17px}
.sample .bd b{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:5px;
  letter-spacing:-.014em}
.sample .bd span{font-size:12.5px;color:var(--ink-2);line-height:1.55}
.lb{position:fixed;inset:0;z-index:130;background:rgba(23,28,36,.62);display:none;
  padding:40px 24px;overflow-y:auto}
.lb.on{display:block}
.lb-in{max-width:860px;margin:0 auto;background:var(--white);border-radius:16px;overflow:hidden;
  box-shadow:0 28px 80px rgba(15,20,30,.4)}
.lb-in:before{content:"";display:block;height:3px;background:var(--brand-line)}
.lb-in img{width:100%;display:block}
.lb-cap{padding:16px 22px 20px;border-top:1px solid var(--line);background:var(--bg-soft-2)}
.lb-cap b{display:block;font-size:15px;font-weight:600;color:var(--ink);margin-bottom:5px}
.lb-cap span{font-size:13px;color:var(--ink-2);line-height:1.55}
.lb-x{position:fixed;right:22px;top:22px;width:38px;height:38px;border-radius:10px;
  background:var(--white);border:1px solid var(--line-2);display:flex;align-items:center;
  justify-content:center;color:var(--ink);box-shadow:var(--shadow)}
.lb-x svg{width:15px;height:15px}

/* ---------- digital learning tiles --------------------------------------- */
.vidgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(292px,1fr));gap:20px}
.vid{background:var(--white);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  text-align:left;padding:0;display:flex;flex-direction:column;width:100%;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.vid:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.vid .im{position:relative;aspect-ratio:16/9;background:var(--bg-soft);overflow:hidden;
  border-bottom:1px solid var(--line)}
.vid .im img{width:100%;height:100%;object-fit:cover}
.vid .pbadge{position:absolute;left:10px;top:10px;display:inline-flex;align-items:center;gap:6px;
  font-size:10.5px;font-weight:650;letter-spacing:.06em;text-transform:uppercase;
  background:rgba(255,255,255,.94);border:1px solid var(--line);color:var(--ink-2);
  padding:4px 9px;border-radius:99px;backdrop-filter:blur(3px)}
.vid .pbadge svg{width:10px;height:10px}
.vid .bd{padding:15px 16px 17px;display:flex;flex-direction:column;flex:1}
.vid .bd b{display:block;font-size:14.5px;font-weight:600;color:var(--ink);margin-bottom:4px;
  letter-spacing:-.014em}
.vid .bd span{font-size:12.5px;color:var(--ink-2);line-height:1.55}
.vid .bd .chips{margin-top:auto;padding-top:12px}

/* ---------- book explorer ------------------------------------------------ */
.bookgrid2{display:grid;grid-template-columns:repeat(auto-fill,minmax(178px,1fr));gap:22px}
.btile{display:flex;flex-direction:column;gap:9px;text-align:left;padding:0;background:none;
  width:100%}
.btile .cov{position:relative;aspect-ratio:3/4;border-radius:10px;overflow:hidden;
  background:var(--bg-soft);border:1px solid var(--line);box-shadow:0 8px 24px rgba(20,26,38,.10);
  transition:transform .18s,box-shadow .18s}
.btile:hover .cov{transform:translateY(-3px);box-shadow:0 14px 34px rgba(20,26,38,.17)}
.btile .cov img{width:100%;height:100%;object-fit:cover}
.btile .cov .badge{position:absolute;left:8px;top:8px;font-size:9.5px;font-weight:650;
  letter-spacing:.07em;text-transform:uppercase;background:rgba(255,255,255,.94);
  border:1px solid var(--line);color:var(--ink-2);padding:3px 8px;border-radius:99px}
.btile b{font-size:13.5px;font-weight:600;color:var(--ink);line-height:1.35;letter-spacing:-.012em}
.btile small{display:block;font-size:11.5px;color:var(--ink-3);line-height:1.45}

/* ---------- comparison table --------------------------------------------- */
.cmp td:first-child{font-weight:600;color:var(--ink);width:22%}
.cmp .same{color:var(--k-green-deep);font-weight:600}
.cmp .diff{color:var(--k-orange-deep);font-weight:600}

/* ---------- teacher pillars ---------------------------------------------- */
.pillars{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.pillar{position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:var(--r);padding:22px 20px 20px;overflow:hidden}
.pillar:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;
  background:var(--accent,var(--k-cyan))}
.pillar .pn{font-size:10.5px;font-weight:650;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:9px;display:block}
.pillar h3{font-size:16px;margin-bottom:8px}
.pillar li{position:relative;padding-left:16px;font-size:13px;color:var(--ink-2);
  line-height:1.55;margin-bottom:6px}
.pillar li:before{content:"";position:absolute;left:0;top:8px;width:5px;height:5px;
  border-radius:50%;background:var(--accent,var(--k-cyan));opacity:.55}

/* ---------- lesson flow rail --------------------------------------------- */
.flow{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.flow .fs{background:var(--white);padding:18px 16px 17px}
.flow .fs .fn{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;
  border-radius:8px;font-size:11px;font-weight:650;margin-bottom:10px;
  background:var(--soft-cyan);color:var(--k-cyan-deep)}
.flow .fs b{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:4px;
  letter-spacing:-.014em}
.flow .fs span{font-size:12.5px;color:var(--ink-2);line-height:1.55}

/* ---------- resource cards ----------------------------------------------- */
.rescards{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:18px}
.res{position:relative;display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--line);border-radius:var(--r);padding:20px 18px 18px;overflow:hidden;
  transition:transform .18s,box-shadow .18s,border-color .18s}
.res:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--line-2)}
.res:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--accent,var(--k-cyan));opacity:0;transition:opacity .18s}
.res:hover:before{opacity:1}
.res h3{font-size:15.5px;margin-bottom:6px}
.res p{font-size:13px;line-height:1.55;margin-bottom:14px}
.res .btns{margin-top:auto}

/* ---------- standards ----------------------------------------------------- */
.stdgrid{display:grid;gap:12px}
.std{border:1px solid var(--line);border-radius:var(--r);background:var(--white);padding:18px 20px}
.std .sc{display:inline-block;font-family:var(--ff-mono);font-size:11px;color:var(--k-cyan-deep);
  background:var(--soft-cyan);border:1px solid rgba(1,195,255,.3);padding:3px 9px;
  border-radius:6px;margin-bottom:9px}
.std p{font-size:13.5px;line-height:1.6}
.std .cover2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px}
.std .cover2 div{border-left:2px solid var(--line);padding-left:12px}
.std .cover2 b{display:block;font-size:10px;font-weight:650;letter-spacing:.09em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:5px}
.std .cover2 span{display:block;font-size:12px;color:var(--ink-2);line-height:1.55;margin-bottom:3px}

/* ---------- hero book fan ------------------------------------------------- */
.fan{display:flex;justify-content:center;align-items:flex-end;gap:0}
.fan img{width:30%;border-radius:9px;border:1px solid var(--line);
  box-shadow:0 16px 38px rgba(20,26,38,.20);background:var(--white)}
.fan img:nth-child(1){transform:rotate(-6deg) translateY(10px);z-index:1}
.fan img:nth-child(2){width:34%;z-index:3;margin:0 -3%}
.fan img:nth-child(3){transform:rotate(6deg) translateY(10px);z-index:1}

/* ---------- statement / quote band --------------------------------------- */
.stmt{position:relative;border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--bg-soft-2);padding:30px 32px;overflow:hidden}
.stmt:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand-line)}
.stmt p{font-size:18px;line-height:1.55;color:var(--ink);letter-spacing:-.014em;max-width:70ch}
.stmt .src{display:block;margin-top:12px;font-size:11.5px;color:var(--ink-3)}

/* ---------- search -------------------------------------------------------- */
.searchbox{position:relative;max-width:620px}
.searchbox input{padding-left:40px}
.searchbox .si{position:absolute;left:13px;top:50%;transform:translateY(-50%);
  width:15px;height:15px;color:var(--ink-3);pointer-events:none}
.sres{margin-top:14px;border:1px solid var(--line);border-radius:var(--r);background:var(--white);
  max-height:420px;overflow:auto}
.sres a{display:block;padding:12px 16px;border-bottom:1px solid var(--line)}
.sres a:last-child{border-bottom:0}
.sres a:hover{background:var(--bg-soft-2)}
.sres a b{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:2px}
.sres a span{font-size:11.5px;color:var(--ink-3)}
.sres .none{padding:16px;font-size:13px;color:var(--ink-3)}

/* ---------- misc ---------------------------------------------------------- */
.two{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:34px;align-items:start}
.two.rev{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr)}
.statusline{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;color:var(--ink-3);
  border:1px solid var(--line);background:var(--bg-soft);border-radius:99px;padding:5px 12px}
.statusline i{width:6px;height:6px;border-radius:50%;background:var(--k-green);display:block}
.statusline.wip i{background:var(--k-yellow)}
.prevnext{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:8px}
.prevnext a{display:block;border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;
  background:var(--white);transition:border-color .16s,box-shadow .16s}
.prevnext a:hover{border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.prevnext a span{display:block;font-size:10px;font-weight:650;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-3);margin-bottom:4px}
.prevnext a b{font-size:14px;font-weight:600;color:var(--ink);letter-spacing:-.012em}
.prevnext a.nx{text-align:right}

/* ---------- Social Science responsive ------------------------------------- */
@media (max-width:1180px){
  .pillars{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:980px){
  .edcards{grid-template-columns:minmax(0,1fr)}
  .two,.two.rev{grid-template-columns:minmax(0,1fr);gap:28px}
  .std .cover2{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  .pillars{grid-template-columns:minmax(0,1fr)}
  .bookgrid2{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .samples{grid-template-columns:minmax(0,1fr)}
  .vidgrid{grid-template-columns:minmax(0,1fr)}
  .coggrid{grid-template-columns:minmax(0,1fr)}
  .edcard .edstats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .linkrow{grid-template-columns:minmax(0,1fr)}
  .prevnext{grid-template-columns:minmax(0,1fr)}
  .lb{padding:20px 12px}
  .lb-x{right:12px;top:12px}
  .stmt{padding:22px 20px}
  .stmt p{font-size:16px}
  .flow{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:reduce){
  .edcard:hover,.sample:hover,.vid:hover,.btile:hover .cov,.res:hover{transform:none}
}