/* ==========================================================================
   Crystal Medical Life · Liquid Glass UI  (shared by every page)
   ========================================================================== */

/* ---------- 1. Fonts (self-hosted, Latin subset, variable) ---------- */
@font-face{font-family:"Fraunces";src:url(/fonts/fraunces.woff2) format("woff2");font-weight:500 700;font-display:swap}
@font-face{font-family:"Inter";src:url(/fonts/inter.woff2) format("woff2");font-weight:400 700;font-display:swap}

/* ---------- 2. Design tokens ---------- */
:root{
  /* brand */
  --brand:#0b5d6b; --brand-hi:#12949b; --brand-ink:#ffffff;
  --acc-purple:#6d45b8; --acc-amber:#92560a; --acc-coral:#b3432e;
  --ok:#137a4f; --bad:#b83a26;
  /* light theme: pearl */
  --bg:#f3f5f4; --bg-2:#e9efee; --surface:#ffffff; --surface-2:#f7f9f9;
  --ink:#0d1d21; --ink-2:#26393e; --muted:#4f6267; --line:rgba(13,29,33,.11);
  --ok-tint:#dff3e9; --bad-tint:#fbe5e0; --brand-tint:#e2f1f0;
  /* glass */
  --g-fill:rgba(255,255,255,.58); --g-fill-strong:rgba(255,255,255,.78); --g-fill-lite:rgba(255,255,255,.94);
  --g-edge-hi:rgba(255,255,255,.95); --g-edge-lo:rgba(13,45,52,.14);
  --g-spec:rgba(255,255,255,.55); --g-light:rgba(255,255,255,.55);
  --g-shadow:0 12px 32px -10px rgba(8,48,56,.28);
  --blur:18px; --blur-lite:0px;
  /* liquid canvas */
  --blob-1:#7fd1c7; --blob-2:#b8a6f0; --blob-3:#f6c7a5; --blob-4:#9fd0ef; --blob-op:.55;
  /* shape */
  --r-xs:10px; --r-s:14px; --r-m:18px; --r-l:26px; --r-xl:34px; --r-pill:999px;
  /* spacing */
  --s1:4px; --s2:8px; --s3:12px; --s4:16px; --s5:24px; --s6:32px; --s7:48px; --s8:64px;
  /* type */
  --f-head:"Fraunces",Georgia,serif; --f-ui:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --fs-body:1.0625rem; --lh-body:1.6; --measure:65ch;
  /* motion */
  --e-out:cubic-bezier(.2,.8,.2,1);
  --e-spring:linear(0,.009,.035 2.1%,.141,.281 6.7%,.723 12.9%,.938 16.7%,1.017,1.077,1.121,1.149 24.3%,1.159,1.163,1.161,1.154 29.9%,1.129 32.8%,1.051 39.6%,1.017 43.1%,.991,.977 51%,.974 53.8%,.975 57.1%,.997 69.8%,1.003 76.9%,1);
  --t-fast:.18s; --t-med:.32s; --t-slow:.6s;
  --focus:0 0 0 3px rgba(18,148,155,.55),0 0 18px rgba(18,148,155,.45);
  color-scheme:light;
}
/* dark theme: deep ink (the hero theme) */
html[data-theme="dark"]{
  --bg:#0a1416; --bg-2:#0e1c1f; --surface:#122326; --surface-2:#16292d;
  --ink:#e9f2f2; --ink-2:#cfdddd; --muted:#9fb3b6; --line:rgba(220,240,240,.11);
  --brand:#3cc3bd; --brand-hi:#6fe0d6; --brand-ink:#04211f;
  --acc-purple:#b79bff; --acc-amber:#f0b75a; --acc-coral:#ff9a7f;
  --ok:#52d69a; --bad:#ff8a75;
  --ok-tint:#123a2b; --bad-tint:#3e1d18; --brand-tint:#13353a;
  --g-fill:rgba(18,38,42,.52); --g-fill-strong:rgba(16,34,38,.74); --g-fill-lite:rgba(18,36,40,.95);
  --g-edge-hi:rgba(190,255,250,.20); --g-edge-lo:rgba(0,0,0,.45);
  --g-spec:rgba(170,255,245,.10); --g-light:rgba(120,255,240,.16);
  --g-shadow:0 16px 40px -12px rgba(0,0,0,.65);
  --blob-1:#0f8f88; --blob-2:#5a3fb0; --blob-3:#a5532c; --blob-4:#1d5f9e; --blob-op:.5;
  --focus:0 0 0 3px rgba(111,224,214,.6),0 0 22px rgba(111,224,214,.5);
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]){
  --bg:#0a1416; --bg-2:#0e1c1f; --surface:#122326; --surface-2:#16292d;
  --ink:#e9f2f2; --ink-2:#cfdddd; --muted:#9fb3b6; --line:rgba(220,240,240,.11);
  --brand:#3cc3bd; --brand-hi:#6fe0d6; --brand-ink:#04211f;
  --acc-purple:#b79bff; --acc-amber:#f0b75a; --acc-coral:#ff9a7f;
  --ok:#52d69a; --bad:#ff8a75;
  --ok-tint:#123a2b; --bad-tint:#3e1d18; --brand-tint:#13353a;
  --g-fill:rgba(18,38,42,.52); --g-fill-strong:rgba(16,34,38,.74); --g-fill-lite:rgba(18,36,40,.95);
  --g-edge-hi:rgba(190,255,250,.20); --g-edge-lo:rgba(0,0,0,.45);
  --g-spec:rgba(170,255,245,.10); --g-light:rgba(120,255,240,.16);
  --g-shadow:0 16px 40px -12px rgba(0,0,0,.65);
  --blob-1:#0f8f88; --blob-2:#5a3fb0; --blob-3:#a5532c; --blob-4:#1d5f9e; --blob-op:.5;
  --focus:0 0 0 3px rgba(111,224,214,.6),0 0 22px rgba(111,224,214,.5);
  color-scheme:dark;
}}

/* ---------- 3. Base ---------- */
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.28s}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 var(--fs-body)/var(--lh-body) var(--f-ui);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}
h1,h2,h3{font-family:var(--f-head);font-weight:650;line-height:1.15;letter-spacing:-.01em;margin:0;font-variation-settings:"opsz" 72}
h1{font-size:clamp(1.6rem,5vw,2.4rem)}h2{font-size:clamp(1.4rem,4vw,2rem)}h3{font-size:1.15rem;font-variation-settings:"opsz" 30}
p{margin:0}a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit;color:inherit}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:var(--r-s)}
.vh{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{max-width:1120px;margin:0 auto;padding:0 var(--s4)}
.prose{max-width:var(--measure)}
.eyebrow{display:inline-block;font:700 .72rem/1 var(--f-ui);letter-spacing:.09em;text-transform:uppercase;color:var(--brand)}
.muted{color:var(--muted)}

/* ---------- 4. Liquid canvas (background blobs) ---------- */
.liquid{position:fixed;inset:0;z-index:-1;overflow:hidden;pointer-events:none;background:radial-gradient(120% 80% at 50% -10%,var(--bg-2),var(--bg) 60%)}
.liquid i{position:absolute;width:62vmax;height:62vmax;border-radius:50%;opacity:var(--blob-op);will-change:transform;
  background:radial-gradient(closest-side,var(--c) 0%,color-mix(in srgb,var(--c) 40%,transparent) 45%,transparent 72%)}
.liquid i:nth-child(1){--c:var(--blob-1);left:-22vmax;top:-18vmax;animation:drift1 46s ease-in-out infinite alternate}
.liquid i:nth-child(2){--c:var(--blob-2);right:-26vmax;top:8vh;animation:drift2 58s ease-in-out infinite alternate}
.liquid i:nth-child(3){--c:var(--blob-3);left:-10vmax;bottom:-30vmax;animation:drift3 52s ease-in-out infinite alternate}
.liquid i:nth-child(4){--c:var(--blob-4);right:-18vmax;bottom:-24vmax;animation:drift1 38s ease-in-out infinite alternate-reverse}
@keyframes drift1{to{transform:translate3d(14vmax,10vmax,0) scale(1.08)}}
@keyframes drift2{to{transform:translate3d(-16vmax,14vmax,0) scale(.92)}}
@keyframes drift3{to{transform:translate3d(12vmax,-12vmax,0) scale(1.1)}}
@media (max-width:760px){.liquid i:nth-child(n+3){display:none}}
html.paused .liquid i,html.scrolling .liquid i{animation-play-state:paused}

/* ---------- 5. The glass component ---------- */
.glass{position:relative;isolation:isolate;background:var(--g-fill);
  -webkit-backdrop-filter:blur(var(--blur)) saturate(180%);backdrop-filter:blur(var(--blur)) saturate(180%);
  border-radius:var(--r-l);
  box-shadow:inset 1px 1px 0 var(--g-edge-hi),inset -1px -1px 0 var(--g-edge-lo),var(--g-shadow)}
.glass::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:-1;
  background:linear-gradient(140deg,var(--g-spec) 0%,transparent 34%,transparent 70%,color-mix(in srgb,var(--g-spec) 40%,transparent) 100%)}
.glass::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;z-index:-1;opacity:var(--glow,0);transition:opacity .5s var(--e-out);
  background:radial-gradient(260px circle at var(--x,50%) var(--y,30%),var(--g-light),transparent 65%)}
.glass.strong{background:var(--g-fill-strong)}
/* refraction: Chromium only, hero card + tab bar */
@supports (backdrop-filter:url(#liquid)){
  html:not(.lite) .refract{-webkit-backdrop-filter:url(#liquid) blur(12px) saturate(170%);backdrop-filter:url(#liquid) blur(12px) saturate(170%)}
  /* large refracted panels drop frames on mid-range phones (measured): keep refraction on the small tab bar there */
  @media (max-width:760px){html:not(.lite) .refract.big{-webkit-backdrop-filter:blur(var(--blur)) saturate(180%);backdrop-filter:blur(var(--blur)) saturate(180%)}}
}
/* text-safety tint for long reading on glass */
.tint{background:color-mix(in srgb,var(--surface) 72%,transparent);border-radius:var(--r-m)}

/* ---------- 6. Lite mode (low-end devices, reduced motion/transparency) ---------- */
html.lite .liquid i{animation:none}
html.lite .glass{-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--g-fill-lite)}
html.lite .glass::after{display:none}
html.lite *{scroll-behavior:auto}

/* ---------- 7. Buttons and controls ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--s2);min-height:46px;padding:0 var(--s5);border-radius:var(--r-pill);border:0;cursor:pointer;
  font:600 .98rem/1 var(--f-ui);transition:transform var(--t-fast) var(--e-spring),box-shadow var(--t-fast),background var(--t-fast);-webkit-tap-highlight-color:transparent}
.btn:active{transform:scale(.97)}
.btn-pri{background:var(--brand);color:var(--brand-ink);box-shadow:0 8px 20px -8px color-mix(in srgb,var(--brand) 70%,transparent)}
.btn-pri:hover{background:var(--brand-hi)}
.btn-ghost{background:color-mix(in srgb,var(--surface) 70%,transparent);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn-sm{min-height:44px;padding:0 var(--s4);font-size:.9rem}
.link{font-weight:600;color:var(--brand);text-underline-offset:3px;text-decoration:underline;text-decoration-thickness:1.5px;min-height:44px;display:inline-flex;align-items:center}
.iconbtn{width:44px;height:44px;display:grid;place-items:center;border-radius:50%;border:0;background:transparent;cursor:pointer;color:var(--ink)}
.topbar .iconbtn{border:0;background:transparent;box-shadow:none;width:44px;height:44px;padding:0;font-size:inherit}
.iconbtn:hover{background:color-mix(in srgb,var(--ink) 7%,transparent)}

/* ---------- 8. Top bar (glass) ---------- */
.topbar{position:sticky;top:0;z-index:40;padding:10px var(--s3) 6px;background:linear-gradient(var(--bg) 40%,color-mix(in srgb,var(--bg) 0%,transparent));view-transition-name:topbar}
.topbar .tb-in{max-width:1120px;margin:0 auto;display:flex;align-items:center;gap:var(--s3);padding:6px 6px 6px 8px;border-radius:var(--r-pill)}
.byline{display:flex;align-items:center;gap:var(--s3);min-height:44px;margin-right:auto;min-width:0}
.byline img{width:52px;height:52px;border-radius:50%;object-fit:cover;flex:none;box-shadow:0 0 0 2px var(--surface),0 0 0 4px var(--brand)}
.byline b{display:block;font:650 1.14rem/1.15 var(--f-head);font-variation-settings:"opsz" 36;color:var(--ink);white-space:nowrap}
.byline small{display:block;font:600 .76rem/1.3 var(--f-ui);color:var(--brand);white-space:nowrap}
.topnav{display:flex;gap:2px}
.topnav a{min-height:44px;display:inline-flex;align-items:center;padding:0 12px;border-radius:var(--r-pill);font-weight:500;font-size:.92rem;color:var(--ink-2)}
.topnav a:hover,.topnav a[aria-current="page"]{background:color-mix(in srgb,var(--brand) 14%,transparent);color:var(--ink)}
.menu{position:relative}
.menu-sheet{position:absolute;right:0;top:54px;min-width:220px;padding:var(--s2);border-radius:var(--r-m);display:none;flex-direction:column;z-index:50}
.menu-sheet.open{display:flex}
.menu-sheet a{min-height:46px;display:flex;align-items:center;padding:0 var(--s4);border-radius:var(--r-s);font-weight:500}
.menu-sheet a:hover{background:color-mix(in srgb,var(--brand) 12%,transparent)}
.menu-sheet hr{border:0;border-top:1px solid var(--line);margin:var(--s2) 0}
@media (max-width:900px){.topnav{display:none}}

/* ---------- 9. Bottom tab bar (mobile) with gooey pill ---------- */
.tabbar{position:fixed;left:50%;bottom:calc(10px + env(safe-area-inset-bottom));z-index:45;transform:translateX(-50%);width:min(440px,calc(100% - 24px));
  border-radius:var(--r-pill);padding:6px;view-transition-name:tabbar;transition:transform .38s var(--e-out)}
.tabbar.away{transform:translate(-50%,calc(100% + 30px))}
.tabbar nav{position:relative;display:grid;grid-template-columns:repeat(5,1fr)}
.tabbar a{position:relative;z-index:2;min-height:52px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font:600 .68rem/1 var(--f-ui);color:var(--ink-2);border-radius:var(--r-pill)}
.tabbar a svg{width:22px;height:22px}
.tabbar a[aria-current="page"]{color:var(--brand-ink)}
.goo{position:absolute;inset:0;z-index:1;filter:url(#goo);pointer-events:none}
.goo span{position:absolute;top:0;bottom:0;width:20%;left:calc(var(--i,0) * 20%);border-radius:var(--r-pill);background:var(--brand);transition:left .5s var(--e-spring)}
.goo span+span{transform:scale(.62);transition:left .75s var(--e-out)}
html.lite .goo{filter:none}html.lite .goo span+span{display:none}
@media (min-width:901px){.tabbar{display:none}}
body.has-tabbar{padding-bottom:96px}
@media (min-width:901px){body.has-tabbar{padding-bottom:0}}

/* ---------- 10. Content cards (solid, readable) ---------- */
.card{background:var(--surface);border-radius:var(--r-l);box-shadow:0 1px 0 var(--line),0 8px 24px -16px rgba(0,0,0,.25);border:1px solid var(--line)}
.tools{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s3)}
.tool{display:flex;flex-direction:column;gap:6px;padding:var(--s4);min-height:150px;border-radius:var(--r-l);background:var(--surface);border:1px solid var(--line);position:relative;overflow:hidden;
  transition:transform var(--t-med) var(--e-spring)}
.tool:active{transform:scale(.98)}
.tool .ti{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:#fff;background:var(--c)}
.tool .ti svg{width:22px;height:22px}
.tool .tk{font:700 .7rem/1.3 var(--f-ui);letter-spacing:.08em;text-transform:uppercase;color:var(--c-t)}
.tool h3{font-size:1.08rem}
.tool .td{font-size:.88rem;color:var(--muted);line-height:1.45}
.tool::after{content:"";position:absolute;right:-30px;bottom:-30px;width:110px;height:110px;border-radius:50%;background:var(--c);opacity:.09}
@media (max-width:900px){.tools{grid-template-columns:1fr 1fr}.tool .td{display:none}.tool{min-height:0}}

/* ---------- 11. Question card + options (calmest text on the site) ---------- */
.qstem{font:500 1.08rem/1.6 var(--f-ui);color:var(--ink);max-width:var(--measure);letter-spacing:.003em}
.qmeta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:var(--s3)}
.qchip{display:inline-flex;align-items:center;min-height:26px;padding:4px 10px;line-height:1.3!important;border-radius:var(--r-pill);font:700 .7rem/1 var(--f-ui);letter-spacing:.05em;text-transform:uppercase;background:var(--brand-tint);color:var(--brand)}
.qchip.d-easy{background:var(--ok-tint);color:var(--ok)}.qchip.d-moderate{background:color-mix(in srgb,var(--acc-amber) 16%,var(--surface));color:var(--acc-amber)}.qchip.d-difficult{background:var(--bad-tint);color:var(--bad)}
.opts{display:grid;gap:10px;margin-top:var(--s4)}
.opt{position:relative;overflow:hidden;isolation:isolate;display:flex;gap:12px;align-items:flex-start;width:100%;min-height:52px;text-align:left;padding:13px 14px;border-radius:var(--r-m);cursor:pointer;
  border:1.5px solid var(--line);background:color-mix(in srgb,var(--surface) 86%,transparent);color:var(--ink);font:500 1rem/1.45 var(--f-ui);
  transition:transform var(--t-fast) var(--e-spring),border-color var(--t-med);-webkit-tap-highlight-color:transparent}
.opt:active{transform:scale(.97)}
.opt .k{flex:none;width:28px;height:28px;border-radius:9px;display:grid;place-items:center;font:700 .82rem/1 var(--f-ui);background:var(--surface-2);box-shadow:inset 0 0 0 1px var(--line);transition:background var(--t-med),color var(--t-med)}
.opt::before{content:"";position:absolute;inset:0;z-index:-1;background:var(--fill,transparent);clip-path:circle(0 at var(--tx,50%) var(--ty,50%));transition:clip-path .55s var(--e-out)}
.opt.right,.opt.wrong{cursor:default}
.opt.right{--fill:var(--ok-tint);border-color:var(--ok)}.opt.right .k{background:var(--ok);color:#fff;box-shadow:none}
.opt.wrong{--fill:var(--bad-tint);border-color:var(--bad)}.opt.wrong .k{background:var(--bad);color:#fff;box-shadow:none}
.opt.right::before,.opt.wrong::before{clip-path:circle(150% at var(--tx,50%) var(--ty,50%))}
.opt.dim{opacity:.62}
.unfold{display:grid;grid-template-rows:0fr;transition:grid-template-rows var(--t-slow) var(--e-out)}
.unfold>div{overflow:hidden}
.unfold.open{grid-template-rows:1fr}
.explain{margin-top:var(--s4);padding:var(--s4);border-radius:var(--r-m);background:var(--surface);border:1px solid var(--line);font:400 1rem/1.65 var(--f-ui);color:var(--ink-2);max-width:var(--measure)}
.explain .v{display:block;font:650 1.05rem/1.3 var(--f-head);margin-bottom:6px}
.explain .v.ok{color:var(--ok)}.explain .v.no{color:var(--bad)}

/* ---------- 12. Progress ring + orb ---------- */
.ring{--p:0;width:64px;height:64px;flex:none}
.ring circle{fill:none;stroke-width:6;stroke-linecap:round}
.ring .tr{stroke:color-mix(in srgb,var(--ink) 12%,transparent)}
.ring .pr{stroke:var(--brand);stroke-dasharray:var(--len) var(--len);stroke-dashoffset:calc(var(--len) * (1 - var(--p)));transform:rotate(-90deg);transform-origin:50% 50%;transition:stroke-dashoffset 1.1s var(--e-out)}
.orb{position:relative;width:58px;height:58px;border-radius:50%;border:0;padding:0;cursor:pointer;flex:none;overflow:hidden;
  background:color-mix(in srgb,var(--surface) 60%,transparent);box-shadow:inset 0 0 0 1.5px color-mix(in srgb,var(--brand) 55%,transparent),inset 4px 6px 10px rgba(255,255,255,.25),0 6px 16px -6px rgba(0,0,0,.3)}
.orb svg{position:absolute;inset:0;width:100%;height:100%}
.orb .wave{fill:var(--brand);opacity:.88;transform:translateY(calc((1 - var(--fill,0)) * 100%));transition:transform 1.2s var(--e-out)}
.orb .wave path{transform-box:fill-box;animation:wave 3.2s linear infinite}
@keyframes wave{to{transform:translateX(-50%)}}
.orb b{position:absolute;inset:0;display:grid;place-items:center;font:700 .82rem/1 var(--f-ui);color:var(--ink);text-shadow:0 1px 2px color-mix(in srgb,var(--surface) 80%,transparent)}
html.lite .orb .wave path{animation:none}

/* ---------- 13. Sheets, toasts ---------- */
.sheet-bg{position:fixed;inset:0;z-index:60;background:rgba(5,15,18,.4);display:none}
.sheet-bg.open{display:block}
.sheet{position:fixed;left:50%;bottom:calc(12px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:61;width:min(460px,calc(100% - 24px));padding:var(--s5);display:none}
.sheet.open{display:block;animation:rise .42s var(--e-spring)}
@keyframes rise{from{transform:translate(-50%,40px);opacity:0}}
.ostats{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);margin:var(--s4) 0}
.ostat{padding:var(--s3);border-radius:var(--r-m);background:color-mix(in srgb,var(--surface) 70%,transparent);text-align:center}
.ostat b{display:block;font:650 1.4rem/1.2 var(--f-head);color:var(--ink)}
.ostat span{font-size:.78rem;color:var(--muted)}
.kd-toast{position:fixed;left:50%;top:84px;transform:translateX(-50%);z-index:70;width:min(440px,calc(100% - 24px));padding:var(--s4) var(--s5);border-radius:var(--r-m);display:none}
.kd-toast.open{display:block;animation:rise .4s var(--e-spring)}

/* ---------- 14. Bookshelf (eBooks) ---------- */
.shelf{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s5);perspective:1100px}
.book{display:flex;flex-direction:column;gap:10px}
.cover{position:relative;display:block;border-radius:6px 12px 12px 6px;overflow:hidden;aspect-ratio:3/2;background:var(--bg-2);
  transform:rotateY(-14deg) rotateX(3deg);transform-origin:left center;transition:transform .7s var(--e-out);
  box-shadow:-2px 0 0 rgba(0,0,0,.18) inset,14px 18px 30px -12px rgba(0,0,0,.45),3px 3px 0 color-mix(in srgb,var(--ink) 10%,transparent)}
.cover img{width:100%;height:100%;object-fit:cover}
.cover::after{content:"";position:absolute;inset:0;background:radial-gradient(220px circle at var(--x,30%) var(--y,20%),rgba(255,255,255,.28),transparent 60%),linear-gradient(90deg,rgba(0,0,0,.22),transparent 7%)}
.book:hover .cover,.book:focus-within .cover{transform:rotateY(-4deg) rotateX(1deg)}
.book h3{font-size:1rem;line-height:1.3}
.book p{font-size:.88rem;color:var(--muted)}
.book .buy{display:flex;align-items:center;gap:var(--s2);flex-wrap:wrap;margin-top:auto}
.price{font:650 1.2rem/1 var(--f-head);margin-right:auto}
.rating{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:0 14px;border-radius:var(--r-pill);font-weight:600;font-size:.88rem;background:var(--surface);border:1px solid var(--line)}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s3);margin-top:var(--s5)}
.quote{margin:0;padding:var(--s4);border-radius:var(--r-m);background:var(--surface);border:1px solid var(--line)}
.quote blockquote{margin:0;font:500 1rem/1.5 var(--f-head);font-variation-settings:"opsz" 18}
.quote figcaption{margin-top:8px;font-size:.8rem;color:var(--muted)}
@media (max-width:760px){
  .shelf{grid-template-columns:1fr;gap:var(--s4)}
  .book{flex-direction:row;align-items:center;gap:var(--s4)}
  .book .cover{width:34%;flex:none}
  .book .buy{gap:4px 10px}.book .buy .btn{min-height:44px;padding:0 16px}
  .book>div{flex:1;display:flex;flex-direction:column;gap:6px;min-width:0}
  .quotes{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;margin:var(--s4) calc(-1 * var(--s4)) 0;padding:0 var(--s4) 6px}
  .quote{flex:0 0 82%;scroll-snap-align:start}
}

/* ---------- 14b. Result card (glass) ---------- */
.result{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:center;padding:24px;border-radius:var(--r-xl);margin-top:18px}
.result .ring{width:140px;height:140px;--len:339.3}
.result .ring circle{stroke-width:10}
.ringbox{position:relative;width:140px;height:140px}
.ringbox .in{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.ringbox .in b{font:650 1.9rem/1 var(--f-head)}.ringbox .in span{font-size:.78rem;color:var(--muted)}
.result h2{font-size:1.5rem}
.result .meta{color:var(--muted);margin-top:4px}
.bw{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:14px}
.bw div{padding:10px 12px;border-radius:var(--r-s);background:color-mix(in srgb,var(--surface) 70%,transparent)}
.bw small{display:block;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.bw b{font-size:.92rem;line-height:1.35;display:block}
@media (max-width:640px){.result{grid-template-columns:1fr;justify-items:center;text-align:center;padding:20px 16px}.bw{width:100%;text-align:left}}

/* ---------- 15. Teacher's note (end-of-session eBook card) ---------- */
.note-card{position:relative;margin:var(--s5) 0;padding:var(--s5) var(--s5) var(--s4);border-radius:var(--r-m);
  background:color-mix(in srgb,#fff6e3 88%,var(--surface));color:#2a2416;box-shadow:0 1px 0 rgba(0,0,0,.06),0 10px 24px -16px rgba(60,40,0,.45)}
html[data-theme="dark"] .note-card{background:#22201a;color:#efe6d2}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]) .note-card{background:#22201a;color:#efe6d2}}
.note-card p{font:500 italic 1.08rem/1.55 var(--f-head);font-variation-settings:"opsz" 24;font-synthesis:style}
.note-card .sig{display:block;margin-top:8px;font:500 italic .92rem/1 var(--f-head);opacity:.8}

html .rec{margin:22px 0;padding:20px 20px 16px;border:0;border-radius:6px 18px 18px 18px;background:#fbf4e4;color:#2a2416;
  box-shadow:0 1px 0 rgba(0,0,0,.05),0 12px 26px -18px rgba(60,40,0,.5);background-image:repeating-linear-gradient(transparent 0 27px,rgba(120,90,30,.09) 27px 28px)}
html[data-theme="dark"] .rec{background-color:#211e17;color:#efe6d2;background-image:repeating-linear-gradient(transparent 0 27px,rgba(255,240,200,.06) 27px 28px)}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]) .rec{background-color:#211e17;color:#efe6d2;background-image:repeating-linear-gradient(transparent 0 27px,rgba(255,240,200,.06) 27px 28px)}}
html .rec p{font:500 italic 1.1rem/1.55 var(--f-head);color:inherit;font-synthesis:style;margin:6px 0 8px}
html .rec .rec-k{font:500 italic .95rem/1.2 var(--f-head);letter-spacing:0;text-transform:none;color:inherit;opacity:.75}
html .rec b{color:inherit;opacity:.75;font-weight:600}
html .rec-top img{width:64px;border-radius:4px;transform:rotate(-3deg);box-shadow:0 4px 10px -4px rgba(0,0,0,.4)}
html .rec-x{width:44px;height:44px;top:2px;right:2px;color:inherit;opacity:.6}
html .rec-btns a{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-color:rgba(120,90,30,.3);color:inherit;background:transparent}
html .rec-btns a.pri{background:#3b3020;color:#fbf4e4;border-color:transparent}
html[data-theme="dark"] .rec-btns a.pri{background:#efe6d2;color:#211e17}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]) .rec-btns a.pri{background:#efe6d2;color:#211e17}}

/* ---------- 16. Sections, footer ---------- */
.section{padding:var(--s7) 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:var(--s4);flex-wrap:wrap;margin-bottom:var(--s5)}
.section-head p{color:var(--muted);margin-top:6px}
.foot{padding:var(--s6) 0 var(--s7);border-top:1px solid var(--line);font-size:.9rem;color:var(--muted)}
.foot nav{display:flex;flex-wrap:wrap;gap:4px 14px;margin:var(--s3) 0}
.foot nav a{min-height:44px;display:inline-flex;align-items:center;color:var(--ink-2)}
.dm{display:flex;gap:var(--s2);flex-wrap:wrap;margin:var(--s3) 0}
.dm a{flex:1;min-width:150px;white-space:nowrap;font-size:.88rem}
.ig-grad{background:linear-gradient(45deg,#f9a03f,#d62976 45%,#962fbf 80%);color:#fff}
.x-dark{background:#0f1419;color:#fff}
html[data-theme="dark"] .x-dark{background:#e9f2f2;color:#0f1419}
@media (prefers-color-scheme:dark){html:not([data-theme="light"]) .x-dark{background:#e9f2f2;color:#0f1419}}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}