/* Smart Kidz Club - shared site stylesheet (smartkidz-site.css).
   Extracted from books-categories-index-v2.html. Live path: /assets/css/smartkidz-site.css
   Shared by the browse Phase 1 index pages and the Phase 2 leaf pages. */
/* Smart Kidz Club - book page stylesheet (shared by all book pages). Brand palette, not seasonal. */
:root{
  --ink:#17212F;--muted:#4F5B6B;--bg:#F4F8FC;--surface:#fff;--line:#DAE3EE;
  --blue:#138CCE;--blue-ink:#0A67A0;--blue-strong:#0A67A0;--blue-deep:#0B4F7C;
  --yellow:#FDB515;--red:#E01E4E;--red-dark:#BE1A42;
  --teal:#56BFBD;--sun:#FEDF65;--pink:#F6C1C3;--lime:#D7E177;
  --t1:rgba(86,191,189,.22);--t2:rgba(254,223,101,.5);--t3:rgba(246,193,195,.55);--t4:rgba(215,225,119,.55);
  --shadow:0 1px 2px rgba(23,33,47,.06),0 8px 20px rgba(23,33,47,.07);
  color-scheme:light dark}
@media (prefers-color-scheme:dark){:root{
  --ink:#EAF1F8;--muted:#AEBBCA;--bg:#0E1621;--surface:#162232;--line:#27384C;--blue-ink:#6CC1F0;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 20px rgba(0,0,0,.35)}}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:16px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 1.0625rem/1.65 Roboto,Arial,sans-serif;-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto}
a{color:var(--blue-ink);text-underline-offset:3px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:8px}
h1,h2,h3{margin:0;line-height:1.2;font-weight:600;}
h2{font-size:clamp(1.4rem,3.4vw,1.8rem);color:var(--blue-ink);margin-bottom:16px}
h3{font-size:1.2rem;margin:26px 0 10px}
p{margin:0 0 1em}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
.sec{margin:52px 0}

/* header */
.site-header{background:var(--yellow);color:#17212F}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px 24px;min-height:70px;padding-block:5px}
.brand{display:block}.brand img{display:block;height:56px;width:auto}
.site-nav{display:flex;flex-wrap:wrap;gap:4px}
.site-nav a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border-radius:999px;color:#17212F;font-weight:700;font-size:.95rem;text-decoration:none}
.site-nav a:hover{background:rgba(255,255,255,.6)}
.crumbs{padding:16px 0 0;font-size:.9rem;color:var(--muted)}
.crumbs a{color:inherit}

/* hero */
.book-hero{display:grid;gap:26px;justify-items:center;text-align:center;margin-top:14px;padding:30px 20px;border-radius:28px;background:rgba(19,140,206,.1)}
.book-cover{width:min(250px,64%);padding-left:14px;border-radius:12px 8px 8px 12px;box-shadow:var(--shadow);
  background:linear-gradient(to bottom,var(--teal) 0 25%,var(--sun) 25% 50%,var(--pink) 50% 75%,var(--lime) 75%) left top/14px 100% no-repeat}
.book-cover img{display:block;width:100%;border-radius:0 8px 8px 0}
.book-hero h1{font-size:clamp(1.8rem,5vw,2.7rem);color:var(--blue-ink);letter-spacing:-.01em}
.tagline{margin:10px 0 18px;font-size:1.15rem;font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:0 0 22px;padding:0;list-style:none}
.chips li{display:flex;gap:6px;align-items:center;padding:6px 14px;border-radius:999px;font-size:.92rem;font-weight:700}
.chips li:nth-child(4n+1){background:var(--t1)}.chips li:nth-child(4n+2){background:var(--t2)}
.chips li:nth-child(4n+3){background:var(--t3)}.chips li:nth-child(4n+4){background:var(--t4)}
.actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-bottom:18px}
.stripe{height:6px;margin:28px 0 0;border-radius:3px;background:linear-gradient(to right,var(--teal) 0 25%,var(--sun) 25% 50%,var(--pink) 50% 75%,var(--lime) 75%)}

/* buttons, pills */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 24px;border:2px solid transparent;border-radius:999px;background:var(--red);color:#fff;font:inherit;font-weight:800;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--red-dark)}
.btn--ghost{background:transparent;color:var(--blue-ink);border-color:currentColor}
.btn--ghost:hover{background:rgba(19,140,206,.12)}
.btn--yellow{background:var(--yellow);color:#17212F}.btn--yellow:hover{background:#FFC83D}
.pills{display:flex;gap:8px;overflow-x:auto;margin:0;padding:16px 0 4px;scrollbar-width:none}
.pills::-webkit-scrollbar{display:none}
.pills a{flex:none;display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border:2px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);font-size:.93rem;font-weight:700;text-decoration:none}
.pills a:hover{border-color:var(--blue);color:var(--blue-ink)}
.pills--wrap{flex-wrap:wrap;overflow:visible;margin-top:20px;padding:0}

/* share */
.share{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}
.share__label{margin-right:4px;font-size:.95rem;font-weight:800}
.share__btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:44px;padding:0 15px;border:2px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);font:inherit;font-size:.92rem;font-weight:700;text-decoration:none;cursor:pointer}
.share__btn:hover{border-color:var(--blue);color:var(--blue-ink)}
.share__btn[hidden]{display:none}
.share__status{flex-basis:100%;min-height:1.4em;font-size:.88rem;text-align:center;color:var(--muted)}
.share--dark .share__label,.share--dark .share__status{color:#fff}
.share--dark .share__btn{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.share--dark .share__btn:hover{background:rgba(255,255,255,.14);border-color:#fff;color:#fff}

/* content */
.pitch{margin:0;padding:20px 22px;border-left:6px solid var(--yellow);border-radius:0 18px 18px 0;background:var(--surface);box-shadow:var(--shadow);font-size:1.15rem}
.pitch p,.angle p{margin:0}
.specs{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.specs th,.specs td{padding:13px 18px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.specs tr:last-child>*{border-bottom:0}
.specs th{width:32%;background:rgba(19,140,206,.08);color:var(--blue-ink);font-weight:800}
.apps{display:grid;gap:16px;margin-top:8px}
.app{padding:20px;border:1px solid var(--line);border-radius:18px;background:var(--surface)}
.app p{margin:0 0 14px}
.note{margin:16px 0 0;padding:12px 16px;border-radius:10px;background:var(--t2);font-size:.95rem;font-weight:600}
.talk{display:grid;gap:12px;margin:0;padding:0;list-style:none}
.talk li{position:relative;padding:16px 18px 16px 68px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.talk li::before{content:"?";position:absolute;left:16px;top:14px;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--t1);color:var(--blue-ink);font-size:1.2rem;font-weight:800}
.talk li:nth-child(2)::before{background:var(--t2)}.talk li:nth-child(3)::before{background:var(--t3)}
.quote{margin:24px 0 0;padding:22px 26px;border-radius:20px 20px 20px 4px;background:var(--t1);font-size:1.25rem;font-weight:700;line-height:1.4}
.quote p{margin:0}

/* related books */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:22px 18px;margin:0;padding:0;list-style:none}
.book-card{position:relative;display:flex;flex-direction:column;gap:6px}
.book-card img{display:block;width:100%;aspect-ratio:2/3;object-fit:cover;border-radius:6px 12px 12px 6px;box-shadow:var(--shadow)}
.book-card a{font-weight:800;line-height:1.3;color:var(--blue-ink);text-decoration:none}
.book-card a::after{content:"";position:absolute;inset:0}
.book-card:hover a{text-decoration:underline}
.book-card:hover img{box-shadow:0 0 0 3px var(--blue)}
.book-card small{font-size:.83rem;color:var(--muted);line-height:1.4}
.badge{align-self:flex-start;padding:1px 10px;border-radius:999px;background:var(--t1);font-size:.78rem;font-weight:800}
.badge--audio{background:var(--t3)}

/* faq */
.faq details{margin-bottom:10px;border:1px solid var(--line);border-radius:14px;background:var(--surface)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:54px;padding:12px 18px;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;font-size:1.6rem;line-height:1;color:var(--blue-ink)}
.faq details[open] summary::after{content:"\2212"}
.faq summary h3{margin:0;font-size:1.05rem}
.faq details p{margin:0;padding:0 18px 16px}

/* closing call to action */
.cta{margin:52px 0 0;padding:40px 22px;border-radius:28px;background:var(--blue-deep);color:#fff;text-align:center}
.cta h2{margin-bottom:8px;color:#fff;font-size:clamp(1.6rem,4vw,2.2rem)}
.cta p{margin:0 0 20px;color:#DCEBF7;font-size:1.15rem}
.cta .actions{margin-bottom:24px}
.site-footer{margin-top:44px;padding:24px 0 44px;border-top:1px solid var(--line);color:var(--muted);font-size:.92rem;text-align:center}
.site-footer p{margin:4px 0}

@media (min-width:760px){
  .book-hero{grid-template-columns:250px 1fr;gap:40px;justify-items:stretch;align-items:center;padding:38px;text-align:left}
  .book-cover{width:250px}
  .chips,.actions,.share{justify-content:flex-start}
  .share__status{text-align:left}
  .apps{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .specs th,.specs td{display:block;width:auto}
  .specs th{padding-bottom:2px;border-bottom:0}
  .specs td{padding-top:0}
}
/* closing band stays centered at every width */
.cta .actions,.cta .share{justify-content:center}
.cta .share__status{text-align:center}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ===== category / browse pages ===== */
.crumbs ol{display:flex;flex-wrap:wrap;margin:0;padding:0;list-style:none}
.crumbs li+li::before{content:"\203A";margin:0 8px;color:var(--muted)}
.cat-hero{margin-top:14px;padding:34px 24px 28px;border-radius:28px;background:rgba(19,140,206,.1)}
.cat-hero h1{margin-bottom:16px;color:var(--blue-ink);font-size:clamp(2rem,5.5vw,3rem);letter-spacing:-.01em}
.cat-hero .chips{justify-content:flex-start}
.cat-hero .actions,.cat-hero .share{justify-content:flex-start}
.cat-hero .share__status{text-align:left}
.cat-hero+.pitch{margin-top:20px}
.count{display:flex;flex-wrap:wrap;gap:4px 14px;align-items:baseline;margin:30px 0 16px;color:var(--muted);font-weight:600}
.count strong{color:var(--ink);font-size:1.3rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:20px 16px;margin:0;padding:0;list-style:none}
.card{position:relative;display:flex;flex-direction:column;gap:6px;padding:12px 12px 14px;border:1px solid var(--line);border-radius:18px;background:var(--surface);transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card>a{display:block;color:inherit;text-decoration:none}
.card>a::after{content:"";position:absolute;inset:0;border-radius:18px}
.cover{display:block;width:100%;aspect-ratio:2/3;object-fit:cover;margin-bottom:10px;border-radius:6px 10px 10px 6px;box-shadow:var(--shadow)}
.card-title{display:block;font-weight:800;line-height:1.3;color:var(--blue-ink)}
.card:hover .card-title{text-decoration:underline}
.card-meta{display:flex;flex-wrap:wrap;gap:2px 10px;margin:0;color:var(--muted);font-size:.85rem;font-weight:700}
.card-chips{display:flex;flex-wrap:wrap;gap:5px;margin:2px 0 0}
.chip{padding:1px 10px;border-radius:999px;background:var(--t1);font-size:.76rem;font-weight:800}
.chip--quiz{background:var(--t2)}.chip--activity{background:var(--t3)}.chip--audio{background:var(--t4)}
.qa-list{display:grid;gap:14px}
.qa{padding:18px 20px;border:1px solid var(--line);border-radius:16px;background:var(--surface)}
.qa h3{margin:0 0 6px;font-size:1.08rem}
.qa p{margin:0}
@media (min-width:760px){
  .qa-list{grid-template-columns:1fr 1fr}
  .qa:last-child:nth-child(odd){grid-column:1/-1}
  .cat-hero{padding:44px 40px 36px}
}

/* ===== categories index ===== */
.cat-hero .subtitle{margin:0 0 18px;font-size:1.15rem;font-weight:700}
.tools{margin:28px 0 0}
.tools .pills{padding-top:0}
.filter{margin-top:14px}
.filter[hidden]{display:none}
.filter label{display:block;margin-bottom:6px;font-size:.95rem;font-weight:800}
.filter input{width:100%;min-height:52px;padding:0 22px;border:2px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);font:inherit}
.filter input:focus{border-color:var(--blue)}
.filter__status{min-height:1.5em;margin:6px 6px 0;color:var(--muted);font-size:.92rem}
.why{margin:40px 0 0}
.why p{/* max-width:70ch */}
.cat-group{margin:44px 0 0}
.cat-group[hidden],.cat-card[hidden]{display:none}
.cat-group>h2{margin-bottom:6px}
.group-desc{/*max-width:70ch;*/margin:0 0 18px;color:var(--muted)}
.cat-group--1{--g:var(--t1)}.cat-group--2{--g:var(--t2)}.cat-group--3{--g:var(--t3)}.cat-group--4{--g:var(--t4)}
.cat-grid{display:grid;grid-template-columns:1fr;gap:14px;margin:0;padding:0;list-style:none}
.cat-card{position:relative;display:grid;grid-template-columns:76px 1fr;grid-template-rows:auto auto 1fr;gap:2px 14px;padding:14px;border:1px solid var(--line);border-radius:18px;background:var(--surface);transition:border-color .15s,box-shadow .15s}
.cat-card:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.cat-card .icon{grid-row:1/4;width:76px;height:76px;padding:8px;border-radius:18px;background:var(--g,var(--t1));object-fit:contain}
.cat-card a{align-self:end;color:var(--blue-ink);font-weight:800;line-height:1.25;text-decoration:none}
.cat-card a::after{content:"";position:absolute;inset:0;border-radius:18px}
.cat-card:hover a{text-decoration:underline}
.cat-meta{justify-self:start;margin:2px 0;padding:0 10px;border-radius:999px;background:var(--bg);color:var(--muted);font-size:.8rem;font-weight:800}
.cat-desc{margin:0;color:var(--muted);font-size:.92rem;line-height:1.5}
@media (min-width:640px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.cat-grid{grid-template-columns:repeat(3,1fr)}}

/* Mobile refinements (added 2026-11-05) - phone layout, desktop design unchanged. */
body{overflow-x:hidden}
@media (max-width:480px){
  .wrap{padding:0 16px}
  .sec{margin:40px 0}
  .cat-hero{padding:28px 20px 24px}
  .cat-hero .actions .btn,.cta .actions .btn{flex:1 1 100%}
  .cat-group{margin-top:32px}
}
@media (max-width:360px){
  .cat-card{grid-template-columns:64px 1fr}
  .cat-card .icon{width:64px;height:64px}
}