/* ============================================================
   תרגול מושגים באזרחות · תיכון מעלה — colorful study-app design
   Layout concept: a bright blue "theory-app" hero, one big warm CTA,
   and a grid of color-coded topic tiles; practice runs on white cards
   with a fixed answer dock, like a modern quiz app for teens.
   ============================================================ */
:root{
  color-scheme: light;
  --bg:#F2F5FF; --surface:#FFFFFF; --surface-2:#F6F8FF; --line:#E1E7F7; --line-strong:#B9C3DE;
  --ink:#14203B; --ink-2:#4A5675; --ink-3:#6B7591;
  --brand:#2F5BFF; --brand-2:#1E3FD0; --brand-ink:#FFFFFF; --brand-soft:#E8EEFF;
  --cta:#FFB020; --cta-2:#F59A00; --cta-ink:#2A1700;
  --ok:#12A150; --ok-soft:#E3F7EA; --ok-ink:#0B6B35;
  --hint:#B86E00; --hint-soft:#FFF3D6; --hint-line:#F2B13A;
  --no:#E5484D; --no-soft:#FDECEC;
  --mark:#FFE58A;
  --hero-1:#2F5BFF; --hero-2:#1D3BD1;
  --shadow-1:0 1px 2px rgba(20,32,59,.06),0 2px 6px rgba(20,32,59,.06);
  --shadow-2:0 2px 4px rgba(20,32,59,.05),0 12px 28px -12px rgba(30,52,140,.28);
  --shadow-cta:0 6px 0 var(--cta-2),0 14px 24px -10px rgba(245,154,0,.55);
  --shadow-dock:0 -8px 24px -12px rgba(20,32,59,.22);
  --font:"Rubik","Segoe UI",Arial,system-ui,sans-serif;
  --fs-read:1.1875rem; --lh-read:1.75;
  --r-sm:10px; --r-md:14px; --r-lg:20px; --r-xl:26px;
  --gutter:16px; --w-main:46rem;
  --ease:cubic-bezier(.22,.8,.24,1); --spring:cubic-bezier(.34,1.56,.64,1);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme: dark;
    --bg:#0D1430; --surface:#162047; --surface-2:#1B2654; --line:#26335F; --line-strong:#3E4C80;
    --ink:#EEF2FF; --ink-2:#BCC6E8; --ink-3:#97A3CC;
    --brand:#6E8BFF; --brand-2:#5374FF; --brand-ink:#08102E; --brand-soft:#1E2B63;
    --cta:#FFB938; --cta-2:#D98D00; --cta-ink:#241300;
    --ok:#3DDC84; --ok-soft:#123A2A; --ok-ink:#7CF0AE;
    --hint:#FFC75A; --hint-soft:#3A2C0C; --hint-line:#C98F2E;
    --no:#FF7A7E; --no-soft:#3D1B22; --mark:#5A4B12;
    --hero-1:#2440B8; --hero-2:#16206B;
    --shadow-1:0 0 0 1px var(--line); --shadow-2:0 0 0 1px var(--line),0 16px 30px -14px rgba(0,0,0,.6);
    --shadow-dock:0 -1px 0 var(--line),0 -12px 24px -12px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"]{
  color-scheme: dark;
  --bg:#0D1430; --surface:#162047; --surface-2:#1B2654; --line:#26335F; --line-strong:#3E4C80;
  --ink:#EEF2FF; --ink-2:#BCC6E8; --ink-3:#97A3CC;
  --brand:#6E8BFF; --brand-2:#5374FF; --brand-ink:#08102E; --brand-soft:#1E2B63;
  --cta:#FFB938; --cta-2:#D98D00; --cta-ink:#241300;
  --ok:#3DDC84; --ok-soft:#123A2A; --ok-ink:#7CF0AE;
  --hint:#FFC75A; --hint-soft:#3A2C0C; --hint-line:#C98F2E;
  --no:#FF7A7E; --no-soft:#3D1B22; --mark:#5A4B12;
  --hero-1:#2440B8; --hero-2:#16206B;
  --shadow-1:0 0 0 1px var(--line); --shadow-2:0 0 0 1px var(--line),0 16px 30px -14px rgba(0,0,0,.6);
  --shadow-dock:0 -1px 0 var(--line),0 -12px 24px -12px rgba(0,0,0,.6);
}
:root[data-read="2"]{--fs-read:1.3125rem; --lh-read:1.8}
:root[data-read="3"]{--fs-read:1.4375rem; --lh-read:1.8}
@media (min-width:600px){:root{--gutter:24px}}
@media (min-width:768px){:root{--fs-read:1.25rem} :root[data-read="2"]{--fs-read:1.375rem} :root[data-read="3"]{--fs-read:1.5rem}}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{font-family:var(--font);-webkit-text-size-adjust:100%;text-size-adjust:100%;overflow-x:clip}
body{margin:0;background:var(--bg);color:var(--ink);font-size:1rem;line-height:1.55;min-height:100vh;overflow-x:clip;-webkit-font-smoothing:antialiased}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0;padding:0;-webkit-tap-highlight-color:transparent}
a{color:var(--brand)}
img{max-width:100%}
h1,h2,h3,p{margin:0}
b,strong{font-weight:700}
bdi{unicode-bidi:isolate}
::selection{background:var(--mark);color:var(--ink)}
.ico{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.ico.down{transform:rotate(-90deg);width:18px;height:18px}
:focus-visible{outline:3px solid var(--brand);outline-offset:3px;border-radius:8px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip{position:absolute;inset-inline-start:8px;top:-60px;z-index:60;background:var(--ink);color:var(--surface);padding:10px 14px;border-radius:10px;text-decoration:none}
.skip:focus{top:calc(8px + env(safe-area-inset-top,0px))}
.muted{color:var(--ink-3)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:0 22px;border-radius:var(--r-md);font-weight:700;font-size:1.0625rem;line-height:1.2;text-decoration:none;transition:transform .12s var(--ease),filter .15s,background-color .15s,box-shadow .15s}
.btn:active{transform:translateY(2px) scale(.99)}
.btn.primary{background:var(--brand);color:var(--brand-ink);box-shadow:0 4px 0 var(--brand-2)}
.btn.primary:active{box-shadow:0 2px 0 var(--brand-2)}
.btn.cta{background:var(--cta);color:var(--cta-ink);box-shadow:var(--shadow-cta)}
.btn.cta:active{box-shadow:0 2px 0 var(--cta-2)}
@media (hover:hover){.btn.primary:hover,.btn.cta:hover{filter:brightness(1.05)}}
.btn:disabled{background:var(--line);color:var(--ink-3);box-shadow:none;cursor:not-allowed;transform:none}
.btn.ghost{background:var(--surface);color:var(--ink);box-shadow:inset 0 0 0 2px var(--line)}
@media (hover:hover){.btn.ghost:hover{box-shadow:inset 0 0 0 2px var(--line-strong)}}
.btn.xl{min-height:58px;font-size:1.125rem;width:100%;border-radius:var(--r-lg)}
.btn.wide{width:100%}
.btn .ico{width:22px;height:22px}
.link-btn{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 4px;color:var(--ink-2);font-weight:500;font-size:.9375rem;text-decoration:underline;text-underline-offset:3px}
.link-btn.light{color:#fff;opacity:.9}
.link-btn.quiet{justify-content:center;width:100%}
.icon-btn{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:12px;color:inherit;flex:none}
.icon-btn.small{width:38px;height:38px}
@media (hover:hover){.icon-btn:hover{background:rgba(127,140,180,.16)}}
.chip-btn{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-weight:700;font-size:.9375rem}
.chip-btn.on{background:var(--brand);color:var(--brand-ink)}

/* ---------- hero + app bar ---------- */
.hero,.subhero{position:relative;overflow:hidden;color:#fff;background:linear-gradient(160deg,var(--hero-1),var(--hero-2));padding-top:env(safe-area-inset-top,0px);border-radius:0 0 28px 28px}
.appbar-in{display:flex;align-items:center;gap:10px;height:64px;max-width:var(--w-main);margin:0 auto;padding-left:max(var(--gutter),env(safe-area-inset-left,0px));padding-right:max(var(--gutter),env(safe-area-inset-right,0px))}
.appbar .icon-btn{color:#fff}
.brand{display:flex;align-items:center;gap:10px;min-width:0;flex:1;color:inherit;text-decoration:none}
.logo-chip{display:inline-flex;align-items:center;height:42px;padding:4px 8px;background:#fff;border-radius:12px;flex:none;box-shadow:0 2px 6px rgba(0,0,0,.15)}
.logo-crop{display:block;height:30px;width:106px;overflow:hidden}
.logo-crop img{display:block;width:106px;height:auto;max-width:none;margin-top:-7px}
.logo-fallback{display:none;font:800 1rem/1 var(--font);color:#14203B;padding:0 4px}
.logo-chip.nologo .logo-crop{display:none}.logo-chip.nologo .logo-fallback{display:block}
.brand-text{display:flex;flex-direction:column;min-width:0;line-height:1.25}
.brand-title{font-weight:700;font-size:.9375rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-sub{font-size:.8125rem;opacity:.85;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hw-tag{flex:none;font-weight:700;font-size:.8125rem;background:var(--cta);color:var(--cta-ink);border-radius:999px;padding:5px 11px}
@media (max-width:420px){.hero.hw .brand-text,.on-summary .brand-text{display:none}}
.hero-in{position:relative;z-index:2;max-width:var(--w-main);margin:0 auto;padding:8px max(var(--gutter),env(safe-area-inset-left,0px)) 26px max(var(--gutter),env(safe-area-inset-right,0px));display:grid;gap:8px}
.hero-in.center{justify-items:center;text-align:center}
.hero-title{font-weight:800;font-size:clamp(1.85rem,7vw,2.6rem);line-height:1.12;letter-spacing:0;text-wrap:balance}
.hero-title.sm{font-size:clamp(1.6rem,6vw,2.2rem)}
.hero-sub{font-size:1.0625rem;opacity:.92}
.hero-stats{display:flex;align-items:stretch;gap:10px;margin-top:10px}
.hs-bar{flex:1;display:grid;gap:8px;background:rgba(255,255,255,.14);border-radius:var(--r-md);padding:12px 14px;min-width:0}
.hs-label{font-size:.9375rem}
.hs-label b{font-size:1.125rem}
.hero .meter{background:rgba(255,255,255,.25)}
.hero .meter i{background:#fff}
.hs-pts{display:grid;justify-items:center;align-content:center;gap:0;background:rgba(255,255,255,.14);border-radius:var(--r-md);padding:8px 14px;min-width:84px}
.hs-pts .ico{width:22px;height:22px;fill:var(--cta);stroke:var(--cta)}
.hs-pts b{font-size:1.25rem;line-height:1.1;font-variant-numeric:tabular-nums}
.hs-pts span{font-size:.75rem;opacity:.85}
.hero-deco{position:absolute;inset:0;z-index:1;pointer-events:none}
.hero-deco span{position:absolute;opacity:.13;color:#fff}
.hero-deco .ico{width:64px;height:64px;stroke-width:1.5}
.hero-deco span:nth-child(1){top:18px;inset-inline-start:46%;transform:rotate(-12deg)}
.hero-deco span:nth-child(2){bottom:24px;inset-inline-start:72%;transform:rotate(10deg)}
.hero-deco span:nth-child(3){top:82px;inset-inline-end:-6px;transform:rotate(14deg)}
.hero-deco span:nth-child(4){bottom:-8px;inset-inline-end:28%;transform:rotate(-8deg)}
.hero-deco span:nth-child(5){top:12px;inset-inline-end:28%;opacity:.08}
.meter{position:relative;display:block;height:10px;border-radius:999px;background:var(--line);overflow:hidden}
.meter.sm{height:7px}
.meter i{position:absolute;inset:0 0 0 auto;width:0;border-radius:inherit;background:var(--brand);transition:width .6s var(--ease)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.875rem;color:var(--brand)}
.eyebrow.light,.subhero .eyebrow{color:#fff;opacity:.92}
.eyebrow .ico{width:20px;height:20px}
.step-dot{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:50%;background:var(--brand);color:var(--brand-ink);font-weight:800;font-size:.875rem;flex:none}
.subhero .step-dot{background:#fff;color:var(--hero-2)}
.subhero-in{max-width:var(--w-main);margin:0 auto;padding:4px max(var(--gutter),env(safe-area-inset-left,0px)) 22px max(var(--gutter),env(safe-area-inset-right,0px));display:grid;gap:10px}
.sel-chips{display:flex;flex-wrap:wrap;align-items:center;gap:6px}
.tchip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px 6px 10px;border-radius:999px;background:#fff;color:var(--tc);font-weight:700;font-size:.875rem;box-shadow:var(--shadow-1)}
.tchip .ico{width:18px;height:18px}

/* ---------- home ---------- */
.home,.modes-screen,.summary{max-width:var(--w-main);margin:0 auto;padding:18px max(var(--gutter),env(safe-area-inset-left,0px)) calc(120px + env(safe-area-inset-bottom,0px)) max(var(--gutter),env(safe-area-inset-right,0px));display:grid;gap:18px}
.cta-start{position:relative;display:grid;grid-template-columns:56px 1fr 28px;align-items:center;gap:14px;width:100%;min-height:84px;margin-top:-34px;z-index:3;padding:14px 18px;border-radius:var(--r-lg);background:var(--cta);color:var(--cta-ink);box-shadow:var(--shadow-cta);text-align:start;transition:transform .12s var(--ease),box-shadow .12s}
.cta-start:active{transform:translateY(4px);box-shadow:0 2px 0 var(--cta-2)}
.cta-ico{display:grid;place-items:center;width:56px;height:56px;border-radius:16px;background:rgba(255,255,255,.55)}
.cta-ico .ico{width:30px;height:30px;fill:var(--cta-ink);stroke:var(--cta-ink)}
.cta-txt{display:grid;gap:2px}
.cta-txt b{font-size:1.4rem;font-weight:800;line-height:1.15}
.cta-txt small{font-size:.9375rem;font-weight:500;opacity:.85}
.cta-arrow{width:26px;height:26px}
.resume{display:grid;grid-template-columns:44px 1fr 72px;align-items:center;gap:12px;width:100%;padding:12px 14px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-2),inset 0 0 0 2px var(--brand-soft);text-align:start}
.resume-ico{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand)}
.resume-txt{display:grid;line-height:1.3}.resume-txt b{font-size:1.0625rem}.resume-txt small{color:var(--ink-3);font-size:.875rem}
.sec{display:grid;gap:10px}
.sec-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.sec-title{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.3rem;line-height:1.25}
.sec-title.small{font-size:1.0625rem;font-weight:700;color:var(--ink-2)}
.sec-title .ico{color:var(--brand)}
.sec-note{color:var(--ink-3);font-size:.9375rem;margin-top:-4px}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (min-width:640px){.tiles{grid-template-columns:repeat(3,1fr)}}
.tile{position:relative;display:grid;align-content:start;gap:4px;min-height:146px;padding:12px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1),inset 0 0 0 2px transparent;text-align:start;transition:transform .15s var(--ease),box-shadow .15s,background-color .15s}
.tile:active{transform:scale(.98)}
@media (hover:hover){.tile:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}}
.tile-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:4px}
.tile-ico{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--tc);color:#fff;box-shadow:0 4px 10px -4px var(--tc)}
.tile-ico .ico{width:24px;height:24px}
.tile-check{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;box-shadow:inset 0 0 0 2px var(--line-strong);color:#fff;transition:background-color .15s,box-shadow .15s}
.tile-check .ico{width:18px;height:18px;stroke-width:3;opacity:0;transform:scale(.6);transition:opacity .15s,transform .2s var(--spring)}
.tile-num{font-size:.8125rem;font-weight:700;color:var(--tc)}
.tile-title{font-weight:700;font-size:1rem;line-height:1.3;color:var(--ink)}
.tile-foot{display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:8px}
.tile-foot .meter{flex:1}
.tile .meter i{background:var(--tc)}
.tile-pct{font-size:.8125rem;font-weight:700;color:var(--ink-3);font-variant-numeric:tabular-nums}
.tile.on{background:var(--surface);background:color-mix(in srgb,var(--tc) 11%,var(--surface));box-shadow:var(--shadow-1),inset 0 0 0 2.5px var(--tc)}
.tile.on .tile-check{background:var(--tc);box-shadow:none}
.tile.on .tile-check .ico{opacity:1;transform:none}
.recent ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.recent li{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:10px 14px;border-radius:var(--r-md);background:var(--surface);box-shadow:var(--shadow-1);font-size:.9375rem}
.recent-score{display:grid;justify-items:center;gap:2px;font-variant-numeric:tabular-nums}
.recent-score .stars .star{width:14px;height:14px}
.recent-txt{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--ink-2)}
.recent-date{color:var(--ink-3);font-size:.8125rem;font-variant-numeric:tabular-nums}
.foot-note{display:grid;gap:4px;justify-items:start;color:var(--ink-3);font-size:.875rem;padding-top:6px}
.next-bar{position:fixed;inset:auto 0 0 0;z-index:20;padding:12px max(var(--gutter),env(safe-area-inset-right,0px)) calc(14px + env(safe-area-inset-bottom,0px)) max(var(--gutter),env(safe-area-inset-left,0px));background:linear-gradient(to top,var(--bg) 70%,transparent);transform:translateY(120%);transition:transform .3s var(--ease)}
.next-bar.show{transform:none}
.next-in{max-width:var(--w-main);margin:0 auto}
.next-bar .btn.primary{box-shadow:0 5px 0 var(--brand-2),0 14px 24px -10px rgba(47,91,255,.55)}

/* stars */
.stars{display:inline-flex;gap:4px}
.star{width:34px;height:34px;fill:var(--line);stroke:none}
.star.on{fill:var(--cta)}
.hero .star{fill:rgba(255,255,255,.28)}
.hero .star.on{fill:var(--cta);animation:starpop .5s var(--spring) both;animation-delay:calc(.25s + var(--i) * .15s)}
.hero .stars .star:nth-child(2){width:46px;height:46px;margin-top:-8px}
@keyframes starpop{from{transform:scale(0) rotate(-40deg);opacity:0}to{transform:none;opacity:1}}

/* ---------- modes screen ---------- */
.mode-cards{display:grid;gap:10px}
@media (min-width:640px){.mode-cards{grid-template-columns:1fr 1fr}}
.mcard{display:grid;grid-template-columns:52px 1fr auto;align-items:center;gap:14px;min-height:88px;padding:14px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1),inset 0 0 0 2px transparent;text-align:start;transition:transform .15s var(--ease),box-shadow .15s,background-color .15s}
.mcard:active{transform:scale(.985)}
.mcard-ico{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;background:var(--tc);color:#fff;box-shadow:0 4px 10px -4px var(--tc)}
.mcard-ico .ico{width:28px;height:28px}
.mcard-body{display:grid;gap:3px;min-width:0}
.mcard-name{font-weight:800;font-size:1.125rem;line-height:1.25}
.mcard-desc{font-size:.9375rem;color:var(--ink-2);line-height:1.4}
.mcard-side{display:grid;justify-items:center;gap:6px}
.mcard-count{font-size:.8125rem;font-weight:700;color:var(--ink-3);background:var(--surface-2);border-radius:999px;padding:2px 9px;font-variant-numeric:tabular-nums}
.mcard.on{background:color-mix(in srgb,var(--tc) 10%,var(--surface));box-shadow:var(--shadow-1),inset 0 0 0 2.5px var(--tc)}
.mcard.on .tile-check{background:var(--tc);box-shadow:none}
.mcard.on .tile-check .ico{opacity:1;transform:none}
.mcard.empty{opacity:.5;cursor:not-allowed}
.seg{display:grid;grid-auto-flow:column;grid-auto-columns:1fr;gap:6px;padding:5px;background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow-1)}
.seg-btn{min-height:48px;border-radius:10px;font-weight:700;font-size:1.0625rem;color:var(--ink-2);font-variant-numeric:tabular-nums;transition:background-color .15s,color .15s}
.seg-btn.on{background:var(--brand);color:var(--brand-ink);box-shadow:0 3px 0 var(--brand-2)}

/* ---------- homework entry ---------- */
.hw-card{display:grid;gap:14px;margin-top:-30px;position:relative;z-index:3;padding:18px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-2)}
.hw-row{display:grid;gap:8px}
.hw-k{font-weight:700;font-size:.875rem;color:var(--ink-3)}
.hw-card .tchip{background:color-mix(in srgb,var(--tc) 12%,var(--surface));box-shadow:none}
.hw-note{display:flex;gap:10px;align-items:flex-start;padding:12px;border-radius:var(--r-md);background:var(--brand-soft);color:var(--ink);font-size:.9375rem;line-height:1.5}
.hw-note .ico{color:var(--brand)}

/* ---------- practice shell ---------- */
body.in-play{overflow:hidden}
.play{position:fixed;inset:0 0 auto 0;height:var(--vvh,100vh);transform:translateY(var(--vvt,0px));display:flex;flex-direction:column;background:var(--bg);z-index:5}
.play>.play-top,.play>.hw-line,.play>.dock{flex:none}
.play>.play-scroll{flex:1 1 auto;min-height:0}
.play-top{background:var(--surface);box-shadow:var(--shadow-1);padding-top:env(safe-area-inset-top,0px)}
.play-top-in{display:flex;align-items:center;gap:8px;height:58px;max-width:var(--w-main);margin:0 auto;padding-left:max(8px,env(safe-area-inset-left,0px));padding-right:max(8px,env(safe-area-inset-right,0px));transition:height .2s}
.kb-open .play-top-in{height:46px}
.kb-open .play-top .aa{display:none}
.course{flex:1;display:flex;gap:3px;align-items:center;min-width:0}
.course .blk{flex:1;height:10px;border-radius:999px;background:var(--line);transition:background-color .25s}
.blk.cur{background:var(--brand-soft);box-shadow:inset 0 0 0 2px var(--brand)}
.blk.b-ok{background:var(--ok)}
.blk.b-hint{background:var(--hint-line)}
.blk.b-rev{background:var(--no)}
.course.retry .blk.cur{box-shadow:inset 0 0 0 2px var(--hint-line);background:var(--hint-soft)}
.course.solid{height:10px;border-radius:999px;background:var(--line);overflow:hidden;display:block}
.course-fill{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--brand),#6E8BFF);transition:width .35s var(--ease)}
.counter{font-weight:700;font-size:.9375rem;color:var(--ink-2);white-space:nowrap;direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}
.counter b{color:var(--ink)}
.pill{position:relative;display:inline-flex;align-items:center;gap:4px;height:34px;padding:0 10px;border-radius:999px;font-weight:800;font-size:.9375rem;white-space:nowrap;font-variant-numeric:tabular-nums}
.pill .ico{width:18px;height:18px}
.pill.pts{background:#FFF4D6;color:#8A5300}
.pill.pts .ico{fill:var(--cta);stroke:var(--cta)}
.pill.streak{background:#FFE7DD;color:#C2410C}
.pill.streak .ico{fill:#FB6A2C;stroke:#FB6A2C}
.pill.retry{background:var(--hint-soft);color:var(--hint);font-weight:700;font-size:.8125rem}
:root[data-theme="dark"] .pill.pts{background:#3A2C0C;color:#FFD27A}
:root[data-theme="dark"] .pill.streak{background:#3D1F14;color:#FFA37A}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .pill.pts{background:#3A2C0C;color:#FFD27A}:root:not([data-theme="light"]) .pill.streak{background:#3D1F14;color:#FFA37A}}
.hw-line{display:flex;align-items:center;gap:6px;max-width:var(--w-main);margin:0 auto;width:100%;padding:6px var(--gutter);font-size:.875rem;font-weight:600;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hw-line .ico{width:18px;height:18px;color:var(--brand)}
.kb-open .hw-line{display:none}
.play-scroll{position:relative;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch}
.play-inner{max-width:var(--w-main);margin:0 auto;padding:14px max(var(--gutter),env(safe-area-inset-right,0px)) 30px max(var(--gutter),env(safe-area-inset-left,0px))}
.more-cue{position:sticky;bottom:0;display:flex;align-items:center;justify-content:center;gap:4px;height:34px;margin-top:-34px;font-size:.8125rem;font-weight:600;color:var(--ink-3);background:linear-gradient(to bottom,transparent,var(--bg) 70%);pointer-events:none}

/* card */
.card{background:var(--surface);border-radius:var(--r-xl);box-shadow:var(--shadow-2);padding:16px 18px 20px;display:grid;gap:14px;border-top:6px solid var(--tc);transition:opacity .3s var(--ease),transform .3s var(--ease)}
.card.enter{opacity:0;transform:translateX(-18px)}
.card.leave{opacity:0;transform:translateX(18px);transition:opacity .13s,transform .13s}
@media (min-width:768px){.card{padding:22px 26px 26px}}
.kb-open .card{padding:12px 14px 16px;gap:10px}
.card-head{display:flex;align-items:center;flex-wrap:wrap;gap:6px 8px;min-width:0}
.topic-chip{display:inline-flex;align-items:center;gap:6px;min-width:0;max-width:100%;padding:4px 10px 4px 8px;border-radius:999px;background:color-mix(in srgb,var(--tc) 12%,var(--surface));color:var(--tc);font-weight:700;font-size:.8125rem}
.topic-chip span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topic-chip .ico{width:16px;height:16px}
.mode-chip{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border-radius:999px;background:var(--surface-2);color:var(--ink-2);font-weight:600;font-size:.8125rem}
.mode-chip .ico{width:16px;height:16px;color:var(--mc)}
.kb-open .card-head{display:none}
.qbox{position:relative;display:grid;align-items:center;min-height:58px;padding:14px 16px;border-radius:var(--r-md);background:color-mix(in srgb,var(--tc) 9%,var(--surface));box-shadow:inset 0 0 0 2px color-mix(in srgb,var(--tc) 22%,transparent);transition:background-color .25s,box-shadow .25s}
.qbox>span{grid-area:1/1;transition:opacity .15s,transform .3s var(--spring)}
.q-text{font-weight:700;font-size:1.0625rem;line-height:1.4;color:var(--ink)}
.q-name{font-weight:800;font-size:1.45rem;line-height:1.25;color:var(--ink);opacity:0;transform:scale(.92);padding-inline-end:40px;text-wrap:balance}
.q-badge{justify-self:end;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;opacity:0;transform:scale(.4)}
.q-badge .ico{width:20px;height:20px;stroke-width:3}
.qbox.given{grid-template-rows:auto auto;gap:2px;background:color-mix(in srgb,var(--tc) 9%,var(--surface))}
.qbox.given>span{grid-area:auto}
.qbox.given .q-text{font-size:.875rem;font-weight:600;color:var(--ink-2)}
.qbox.given .q-name{opacity:1;transform:none;padding:0}
.qbox.given .q-badge{display:none}
.qbox.solved .q-text{opacity:0}
.qbox.solved .q-name{opacity:1;transform:none}
.qbox.solved .q-badge{opacity:1;transform:none;transition:opacity .2s .1s,transform .35s var(--spring) .1s}
.qbox.ok{background:var(--ok-soft);box-shadow:inset 0 0 0 2px var(--ok)}
.qbox.ok .q-badge{background:var(--ok);color:#fff}
.qbox.solved.given{grid-template-rows:none;gap:0;background:var(--brand-soft);box-shadow:inset 0 0 0 2px var(--brand)}
.qbox.solved.given>span{grid-area:1/1}
.qbox.solved.given .q-name{padding-inline-end:40px}
.qbox.solved.given .q-badge{display:grid;background:var(--brand);color:#fff}
.qbox.solved-list{background:var(--ok-soft);box-shadow:inset 0 0 0 2px var(--ok)}

/* reading */
.card-body{display:grid;gap:12px}
.def{font-size:var(--fs-read);line-height:var(--lh-read);text-wrap:pretty}
.def p+p{margin-top:.4em}
.def p.lead{font-weight:500;margin-bottom:.5rem}
.def.hl strong{background:linear-gradient(transparent 60%,var(--mark) 60% 92%,transparent 92%);padding-inline:.08em;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.def-list{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.def-list li{display:grid;grid-template-columns:28px 1fr;column-gap:10px;align-items:start}
.def-list .n{display:grid;place-items:center;width:26px;height:26px;margin-top:.2em;border-radius:8px;background:color-mix(in srgb,var(--tc,var(--brand)) 14%,var(--surface));color:var(--tc,var(--brand));font-weight:800;font-size:.875rem}
.blank{display:inline-block;inline-size:3em;block-size:1.05em;border-radius:6px;background:var(--surface-2);box-shadow:inset 0 0 0 2px var(--line-strong);vertical-align:-.15em}
#defBox,#presBox{transition:opacity .25s}
#defBox.fade,#presBox.fade{opacity:0}
.passage{margin:0;font-size:var(--fs-read);line-height:var(--lh-read);padding:14px 16px;border-radius:var(--r-md);background:var(--surface-2);border-inline-start:4px solid var(--tc);text-wrap:pretty}
.passage mark.key{background:linear-gradient(transparent 60%,var(--mark) 60% 92%,transparent 92%);color:inherit;-webkit-box-decoration-break:clone;box-decoration-break:clone}
.source{font-size:.8125rem;color:var(--ink-3)}
.pres-prompt{font-weight:600;color:var(--ink-2)}
.pres-topic{display:flex;align-items:center;gap:6px;font-size:.875rem;color:var(--ink-3)}
.pres-topic .ico{width:18px;height:18px}
.wrote-well{background:var(--surface-2);border-radius:var(--r-md);padding:12px 14px}
.well-h,.book-h{display:flex;align-items:center;gap:6px;font-weight:700;font-size:.875rem;color:var(--ink-2);margin-bottom:4px}
.book-h .ico{width:20px;height:20px;color:var(--brand)}
.kw{display:grid;gap:8px}
.kw-h{font-size:.9375rem;color:var(--ink-2)}
.kw-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.kw-list li{display:inline-flex;align-items:center;gap:4px;padding:5px 11px;border-radius:999px;background:var(--surface-2);box-shadow:inset 0 0 0 1.5px var(--line);font-size:.875rem;color:var(--ink-2)}
.kw-list li.hit{background:var(--ok-soft);box-shadow:inset 0 0 0 1.5px var(--ok);color:var(--ink)}
.kw-list .ico{width:16px;height:16px;color:var(--ok);stroke-width:3}

/* lists */
.list-prompt{display:flex;justify-content:space-between;align-items:center;gap:12px;font-weight:600;color:var(--ink-2)}
.list-count{font-weight:800;font-size:1.0625rem;color:var(--tc);background:color-mix(in srgb,var(--tc) 12%,var(--surface));border-radius:999px;padding:2px 12px;direction:ltr;unicode-bidi:isolate;font-variant-numeric:tabular-nums}
.slots{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.lslot{position:relative;display:grid;grid-template-columns:28px 1fr;gap:10px;align-items:center}
.lslot .n{display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:color-mix(in srgb,var(--tc) 14%,var(--surface));color:var(--tc);font-weight:800;font-size:.875rem}
.lbox{display:flex;align-items:center;min-height:46px;padding:8px 14px;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 2px var(--line);transition:background-color .2s,box-shadow .2s}
.ltxt{font-weight:700;font-size:1rem;line-height:1.35;padding-inline-end:28px}
.lslot.ok .lbox{background:var(--ok-soft);box-shadow:inset 0 0 0 2px var(--ok);animation:pop .35s var(--spring)}
.lslot.missed .lbox{background:var(--surface);box-shadow:inset 0 0 0 2px var(--hint-line)}
.lslot.missed .ltxt{color:var(--ink-2);font-weight:500}
.slot-hint{font-weight:500;color:var(--hint);font-size:.9375rem}
.lcheck{position:absolute;inset-inline-end:12px;top:50%;transform:translateY(-50%);color:var(--ok)}
.lcheck .ico{width:22px;height:22px;stroke-width:3}
.list-note{font-size:.875rem;color:var(--ink-3)}
@keyframes pop{from{transform:scale(.94)}to{transform:none}}

/* interstitial */
.inter{display:grid;gap:14px;justify-items:center;text-align:center;padding:30px 20px;border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-2);border-top:6px solid var(--cta)}
.inter-ico{display:grid;place-items:center;width:72px;height:72px;border-radius:22px;background:var(--hint-soft);color:var(--hint)}
.inter-ico .ico{width:36px;height:36px}
.inter-title{font-weight:800;font-size:1.6rem}
.inter p{color:var(--ink-2);max-width:26rem}
.inter-actions{display:grid;gap:10px;width:100%;max-width:24rem}

/* ---------- dock ---------- */
.dock{background:var(--surface);box-shadow:var(--shadow-dock);border-radius:22px 22px 0 0;padding:12px max(var(--gutter),env(safe-area-inset-right,0px)) calc(12px + env(safe-area-inset-bottom,0px)) max(var(--gutter),env(safe-area-inset-left,0px));z-index:20}
.dock-inner{max-width:var(--w-main);margin:0 auto;display:grid;gap:10px}
.fb-row{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .22s var(--ease),opacity .22s}
.fb-row.open{grid-template-rows:1fr;opacity:1}
.fb-clip{overflow:hidden;min-height:0}
.fb{max-height:calc(var(--vvh,100vh) * .42);overflow-y:auto;display:grid;gap:6px;padding:12px 14px;border-radius:var(--r-md);font-size:1rem}
.fb:empty{display:none}
.fb.is-ok{background:var(--ok-soft)}
.fb.is-given{background:var(--brand-soft)}
.fb.is-hint{background:var(--hint-soft)}
.fb.soft{background:var(--surface-2);padding:10px 14px}
.verdict{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:1.15rem;line-height:1.3}
.v-ico{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;flex:none}
.v-ico .ico{width:18px;height:18px;stroke-width:3}
.verdict.ok .v-ico{background:var(--ok);color:#fff}
.verdict.ok b{color:var(--ok-ink)}
.verdict.given .v-ico{background:var(--brand);color:#fff}
.verdict.given b{color:var(--ink)}
.v-sub{font-size:.9375rem;color:var(--ink-2)}
.v-pts{margin-inline-start:auto;font-weight:800;color:#8A5300;background:#FFE7A8;border-radius:999px;padding:2px 10px;font-size:.9375rem;animation:pop .4s var(--spring)}
.fb-note{font-size:.9375rem;color:var(--ink-2)}
.fb-note.wrote{display:flex;align-items:center;gap:4px}
.fb-note .no{width:16px;height:16px;color:var(--no);stroke-width:3}
.why{font-size:.9375rem;color:var(--ink-2);line-height:1.55}
.fb-def summary{display:inline-flex;align-items:center;gap:6px;min-height:40px;font-weight:700;font-size:.9375rem;color:var(--brand);cursor:pointer;list-style:none}
.fb-def summary::-webkit-details-marker{display:none}
.fb-def summary .ico{width:20px;height:20px}
.fb-def .def{font-size:1rem;line-height:1.65}
.slip-chip{display:inline-flex;align-items:center;gap:8px;min-height:44px;padding:6px 12px;border-radius:var(--r-md);background:var(--brand-soft);color:var(--ink);font-size:.9375rem;text-align:start}
.slip-chip .ico{color:var(--brand);width:20px;height:20px}
.hint{display:grid;gap:10px}
.hint-why{display:flex;align-items:center;gap:8px;font-size:1rem;color:var(--ink)}
.hint-why .ico{color:var(--hint);width:22px;height:22px}
.hint-why b{color:var(--hint)}
.hint-skel{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px}
.h-row{display:flex;gap:6px;flex-wrap:wrap}
.h-letter{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--cta);color:var(--cta-ink);font-weight:800;font-size:1.5rem;box-shadow:0 3px 0 var(--cta-2);animation:pop .35s var(--spring)}
.h-box{display:block;width:44px;height:44px;border-radius:12px;background:var(--surface);box-shadow:inset 0 0 0 2px var(--hint-line);opacity:0;animation:fadein .25s var(--ease) forwards;animation-delay:calc(.06s + var(--i) * .05s)}
.h-letter.sm,.h-box.sm{width:36px;height:36px}
.h-letter.sm{font-size:1.25rem}
.h-txt{font-weight:600;font-size:.9375rem;color:var(--ink-2)}
@keyframes fadein{to{opacity:1}}

.answer-row{display:flex;gap:8px;align-items:stretch}
.slot-wrap{position:relative;flex:1;min-width:0;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 2px var(--line-strong);transition:background-color .15s,box-shadow .15s}
.slot{display:block;width:100%;height:58px;border:0;outline:0;background:transparent;padding-inline:16px 48px;font-weight:600;font-size:1.25rem;color:var(--ink);caret-color:var(--brand);border-radius:inherit}
.slot::placeholder{color:var(--ink-3);opacity:1;font-weight:400;font-size:1.0625rem}
.slot-wrap:focus-within{background:var(--surface);box-shadow:inset 0 0 0 2.5px var(--brand),0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent)}
.slot-wrap.hinting{background:var(--surface);box-shadow:inset 0 0 0 2.5px var(--hint-line)}
.slot-wrap.is-ok{background:var(--ok-soft);box-shadow:inset 0 0 0 2.5px var(--ok)}
.slot-wrap.is-given{background:var(--brand-soft);box-shadow:inset 0 0 0 2.5px var(--brand)}
.slot-wrap.is-ok .slot,.slot-wrap.is-given .slot{caret-color:transparent;font-weight:700}
.slot-clear{position:absolute;inset-inline-end:8px;top:9px;display:grid;place-items:center;width:40px;height:40px;border-radius:10px;color:var(--ink-3)}
.slot-clear .ico{width:20px;height:20px}
.slot-ico{position:absolute;inset-inline-end:14px;top:17px;pointer-events:none;color:var(--ok)}
.slot-wrap.is-given .slot-ico{color:var(--brand)}
.slot-ico .ico{width:24px;height:24px;stroke-width:3}
.slot-ico .draw{stroke-dasharray:24;stroke-dashoffset:24;animation:draw .3s var(--ease) .1s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.go{flex:none;min-width:58px;min-height:58px;padding:0 16px;border-radius:var(--r-md)}
.go .go-label{display:none}
.go .ico{width:24px;height:24px}
.go.idle{background:var(--line);color:var(--ink-3);box-shadow:none}
.go.next{background:var(--ok);box-shadow:0 4px 0 var(--ok-ink);color:#fff;min-width:96px}
.go.next .go-label{display:inline}
@media (min-width:600px){.go .go-label{display:inline}.go{min-width:120px}}
.dock-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.dock-actions:empty{display:none}
.chip-act{display:inline-flex;align-items:center;gap:6px;min-height:42px;padding:0 14px;border-radius:999px;background:var(--surface-2);box-shadow:inset 0 0 0 1.5px var(--line);color:var(--ink-2);font-weight:600;font-size:.9375rem}
.chip-act .ico{width:20px;height:20px;color:var(--hint)}
@media (hover:hover){.chip-act:hover{background:var(--hint-soft)}}
.kb-open .dock{padding-top:8px}
.choices{display:grid;gap:10px}
@media (min-width:600px){.choices{grid-template-columns:1fr 1fr}}
.choice{display:grid;grid-template-columns:40px 1fr auto;align-items:center;gap:12px;min-height:66px;padding:10px 14px;border-radius:var(--r-md);background:var(--surface);box-shadow:inset 0 0 0 2px var(--line-strong),0 3px 0 var(--line);text-align:start;transition:background-color .15s,box-shadow .15s,transform .1s}
.choice:active{transform:translateY(2px)}
@media (hover:hover){.choice:not(:disabled):hover{background:var(--brand-soft);box-shadow:inset 0 0 0 2px var(--brand),0 3px 0 var(--brand-soft)}}
.choice:disabled{cursor:default}
.ck{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--brand-soft);color:var(--brand);font-weight:800;font-size:1.125rem}
.ct{font-weight:700;font-size:1.125rem;line-height:1.3}
.cmark{display:grid;place-items:center;width:30px;height:30px;border-radius:50%}
.cmark .ico{width:18px;height:18px;stroke-width:3}
.choice.right{background:var(--ok-soft);box-shadow:inset 0 0 0 2.5px var(--ok),0 3px 0 var(--ok-soft);animation:pop .35s var(--spring)}
.choice.right .cmark,.choice.right .ck{background:var(--ok);color:#fff}
.choice.wrong{background:var(--no-soft);box-shadow:inset 0 0 0 2.5px var(--no),0 3px 0 var(--no-soft)}
.choice.wrong .cmark,.choice.wrong .ck{background:var(--no);color:#fff}
.ta{height:auto;min-height:5.4em;padding:12px 14px;resize:none;font-weight:400;font-size:1.0625rem;line-height:1.6;border-radius:var(--r-md);background:var(--surface-2);box-shadow:inset 0 0 0 2px var(--line-strong)}
.ta:focus{background:var(--surface);box-shadow:inset 0 0 0 2.5px var(--brand),0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent)}
.dock-body{display:grid;gap:10px}
.dock-body:empty{display:none}
.rate-q{font-weight:800;font-size:1.0625rem}
.rate{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.rate-btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:54px;border-radius:var(--r-md);font-weight:700;font-size:1rem;transition:transform .1s}
.rate-btn:active{transform:translateY(2px)}
.rate-btn .ico{width:20px;height:20px;stroke-width:3}
.rate-btn.r2{background:var(--ok);color:#fff;box-shadow:0 4px 0 var(--ok-ink)}
.rate-btn.r1{background:var(--cta);color:var(--cta-ink);box-shadow:0 4px 0 var(--cta-2)}
.rate-btn.r0{background:var(--surface-2);color:var(--ink-2);box-shadow:inset 0 0 0 2px var(--line-strong)}

/* confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:45;overflow:hidden}
.confetti i{position:absolute;width:9px;height:14px;border-radius:2px;animation:conf .85s cubic-bezier(.2,.7,.3,1) forwards}
@keyframes conf{0%{transform:translate(-50%,-50%) rotate(0) scale(.6);opacity:1}100%{transform:translate(calc(-50% + var(--dx)),calc(-50% + var(--dy) + 60px)) rotate(var(--rot)) scale(1);opacity:0}}

/* ---------- summary ---------- */
.hero.sum .hero-in{padding-bottom:40px;gap:6px}
.sum-score{display:flex;align-items:baseline;justify-content:center;gap:2px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;direction:ltr}
.sum-score b{font-size:clamp(4rem,18vw,5.5rem)}
.sum-score span{font-size:2rem;opacity:.9}
.sum-msg{font-size:1.125rem;font-weight:500;max-width:28rem}
.sum-date{font-size:.875rem;opacity:.8}
.stat-tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:-30px;position:relative;z-index:3}
.stile{display:grid;justify-items:center;gap:2px;padding:12px 6px;border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-2);text-align:center}
.stile .ico{width:22px;height:22px;stroke-width:2.5}
.stile b{font-size:1.5rem;font-weight:800;line-height:1.2;font-variant-numeric:tabular-nums}
.stile span{font-size:.75rem;color:var(--ink-3);line-height:1.25}
.stile.c1 .ico{color:var(--ok)}.stile.c2 .ico{color:var(--hint-line)}.stile.c3 .ico{color:var(--no)}
.stile.c4 .ico{color:var(--cta);fill:var(--cta)}.stile.c5 .ico{color:#FB6A2C;fill:#FB6A2C}
@media (max-width:560px){.stat-tiles{grid-template-columns:repeat(6,1fr)}.stile{grid-column:span 2}.stile.c4,.stile.c5{grid-column:span 3}}
.unit-prog{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.unit-prog li{display:grid;grid-template-columns:36px 1fr auto;grid-template-areas:"ico name pct" "ico bar bar";align-items:center;column-gap:10px;row-gap:6px;padding:10px 12px;border-radius:var(--r-md);background:var(--surface);box-shadow:var(--shadow-1)}
.up-ico{grid-area:ico;display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--tc);color:#fff}
.up-ico .ico{width:20px;height:20px}
.up-name{grid-area:name;font-weight:700;font-size:.9375rem;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.unit-prog .meter{grid-area:bar}
.unit-prog .meter i{background:var(--tc);animation:grow .9s var(--ease) .3s both}
@keyframes grow{from{width:var(--from)}}
.up-pct{grid-area:pct;font-weight:800;font-size:.9375rem;font-variant-numeric:tabular-nums}
.up-pct small{color:var(--ok);font-weight:700;margin-inline-start:4px}
.review-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.review-list details{background:var(--surface);border-radius:var(--r-md);box-shadow:var(--shadow-1)}
.review-list summary{display:flex;align-items:center;gap:10px;min-height:54px;padding:8px 14px;cursor:pointer;list-style:none}
.review-list summary::-webkit-details-marker{display:none}
.rv-dot{width:10px;height:10px;border-radius:50%;background:var(--tc);flex:none}
.rv-name{font-weight:700;flex:1}
.review-list small{color:var(--ink-3);font-size:.8125rem}
.review-list summary .ico{width:20px;height:20px;color:var(--ink-3);transition:transform .15s}
.review-list details[open] summary .ico{transform:rotate(-90deg)}
.review-list .def{font-size:1rem;line-height:1.7;padding:0 14px 14px}
.sum-actions{display:grid;gap:10px}
.send-box{display:grid;gap:12px;padding:18px;border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-2);border-top:6px solid var(--cta)}
.send-preview{justify-self:center;width:100%;max-width:340px;aspect-ratio:4/5;border-radius:var(--r-md);box-shadow:var(--shadow-2);background:var(--surface-2);overflow:hidden;display:grid;place-items:center}
.send-preview img{display:block;width:100%;height:100%;object-fit:cover}
.sp-load{font-size:.9375rem;color:var(--ink-3)}
.send-note,.send-help{font-size:.9375rem;color:var(--ink-2);text-align:center}
.send-help{background:var(--brand-soft);border-radius:var(--r-md);padding:10px 12px;color:var(--ink)}

/* ---------- teacher ---------- */
.teacher{max-width:var(--w-main);margin:0 auto;padding:18px max(var(--gutter),env(safe-area-inset-left,0px)) 60px max(var(--gutter),env(safe-area-inset-right,0px));display:grid;gap:22px}
.t-step{display:grid;gap:12px}
.text-in{display:block;width:100%;height:56px;border:0;border-radius:var(--r-md);background:var(--surface);box-shadow:inset 0 0 0 2px var(--line-strong);padding:0 16px;font-size:1.0625rem;color:var(--ink)}
.text-in:focus{outline:0;box-shadow:inset 0 0 0 2.5px var(--brand),0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent)}
.text-in::placeholder{color:var(--ink-3)}
.char-count{display:block;text-align:left;direction:ltr;font-size:.8125rem;color:var(--ink-3);margin-top:4px;font-variant-numeric:tabular-nums}
.link-box{display:grid;gap:12px;padding:18px;border-radius:var(--r-xl);background:var(--surface);box-shadow:var(--shadow-2);border-top:6px solid var(--brand)}
.link-sum{font-weight:700;color:var(--ink-2)}
.link-in{direction:ltr;unicode-bidi:plaintext;text-align:left;font-size:.9375rem;background:var(--surface-2)}
.link-actions{display:grid;gap:10px}
.btn.copied{background:var(--ok);box-shadow:0 4px 0 var(--ok-ink);color:#fff}
.reason{font-weight:600;color:var(--hint)}
.link-box.off .btn{pointer-events:none;opacity:.5}

/* ---------- sheet / toast ---------- */
.scrim{position:fixed;inset:0;z-index:50;background:rgba(12,18,44,.45);display:flex;align-items:flex-end;justify-content:center;opacity:0;transition:opacity .2s}
.scrim.open{opacity:1}
.sheet{width:100%;max-width:540px;max-height:88vh;overflow:auto;background:var(--surface);border-radius:26px 26px 0 0;padding:12px 20px calc(20px + env(safe-area-inset-bottom,0px));display:grid;gap:16px;transform:translateY(100%);transition:transform .3s var(--ease)}
.scrim.open .sheet{transform:none}
.handle{justify-self:center;width:40px;height:5px;border-radius:3px;background:var(--line-strong)}
@media (min-width:600px){.scrim{align-items:center}.sheet{border-radius:26px;padding:24px}.handle{display:none}}
.sheet-title{font-weight:800;font-size:1.4rem}
.sheet-p{color:var(--ink-2)}
.sheet-actions{display:grid;gap:10px}
.set-block{display:grid;gap:8px}
.set-h{font-weight:700;font-size:.9375rem;color:var(--ink-2)}
.set-sample{--tc:var(--brand);background:var(--surface-2);border-radius:var(--r-md);padding:12px 14px;max-height:9.5em;overflow:hidden;-webkit-mask-image:linear-gradient(#000 70%,transparent);mask-image:linear-gradient(#000 70%,transparent)}
.toggle-row{display:flex;align-items:center;justify-content:space-between;width:100%;min-height:56px;padding:0 14px;border-radius:var(--r-md);background:var(--surface-2);font-weight:600}
.sw-track{position:relative;width:46px;height:28px;border-radius:14px;background:var(--line-strong);transition:background-color .15s}
.sw-track i{position:absolute;top:3px;inset-inline-start:3px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:var(--shadow-1);transition:inset-inline-start .15s var(--ease)}
.toggle-row.on .sw-track{background:var(--brand)}.toggle-row.on .sw-track i{inset-inline-start:21px}
.toast{position:fixed;z-index:55;left:50%;bottom:calc(130px + env(safe-area-inset-bottom,0px));transform:translate(-50%,8px);opacity:0;background:var(--ink);color:var(--surface);border-radius:999px;padding:10px 18px;font-weight:600;font-size:.9375rem;transition:opacity .2s,transform .2s var(--ease);pointer-events:none;max-width:calc(100vw - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- desktop ---------- */
@media (min-width:1024px){
  :root{--w-main:60rem}
  .tiles{grid-template-columns:repeat(4,1fr)}
  .home .cta-start{max-width:34rem}
  .play-inner,.dock-inner,.play-top-in,.hw-line{max-width:46rem}
}

/* ---------- accessibility ---------- */
@media (forced-colors:active){
  .tile.on,.mcard.on,.seg-btn.on,.choice.right{outline:3px solid Highlight}
  .slot-wrap{border:2px solid CanvasText}
  .course .blk{border:1px solid CanvasText}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:1ms!important;animation-delay:0ms!important;transition-duration:80ms!important;scroll-behavior:auto!important}
  .card.enter,.card.leave{transform:none}
}

/* keyboard open: compact dock, "don't know" moves next to the answer */
.kb-idk{display:none}
.kb-open .dock.has-idk .kb-idk{display:inline-grid;width:58px;height:58px;border-radius:var(--r-md);background:var(--hint-soft);color:var(--hint)}
.kb-open .dock.has-idk .dock-actions{display:none}
.kb-open .dock{padding-bottom:8px}
.kb-open .play-top-in{height:42px}
/* review list follows the chosen reading size */
.review-list .def{font-size:var(--fs-read);line-height:var(--lh-read)}
.fb-def .def{font-size:max(1rem, calc(var(--fs-read) - .1875rem))}

/* partial answer: encouragement instead of a penalty */
.fb.is-almost{background:#E3F8F2}
:root[data-theme="dark"] .fb.is-almost{background:#0F3A33}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .fb.is-almost{background:#0F3A33}}
.almost{display:flex;align-items:flex-start;gap:10px;font-size:1.0625rem;line-height:1.45}
.almost b{color:var(--ink)}
.almost-ico{display:grid;place-items:center;flex:none;width:34px;height:34px;border-radius:50%;background:#00A88F;color:#fff;animation:pop .4s var(--spring)}
.almost-ico .ico{width:20px;height:20px;stroke-width:2.2}
.slot-wrap.almost{background:var(--surface);box-shadow:inset 0 0 0 2.5px #00A88F,0 0 0 4px rgba(0,168,143,.18)}