*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
img,video{max-width:100%}
[hidden]{display:none!important}
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}

/* Layout: one long scroll built like a karaoke reel. Every band is a scene: a cobalt stage with a live
   waveform, a pinned "unlearn" scene, a night-blue theatre of playable films, a playground, a week that
   scrolls sideways, an accent stage. The yellow highlighter is the only decoration: it marks what is spoken. */
:root{
  --cobalt:#2D4BFF; --cobalt-deep:#1A2FB5; --night:#0B103A; --night-2:#161D58; --paper:#F3F5FF; --white:#FFFFFF;
  --ink:#101642; --ink-2:#4A5182; --line:#CCD3F5; --soft:#D9DFFF; --hl:#FFD93B; --hl-deep:#D4A800;
  --rec:#E0245E; --mint:#19C79C; --mint-bg:#DDF6EE; --mint-ink:#087F63; --bad-bg:#FFE3EA; --bad:#C81E4A; --note-bg:#FFF0D1; --note:#8A4B00;
  --f-display:"Bricolage Grotesque","Trebuchet MS","Segoe UI",system-ui,sans-serif;
  --f-body:"Figtree","Segoe UI",system-ui,-apple-system,sans-serif;
  --nav:58px;
  --ground:#F3F5FF; --surface:#FFFFFF; --surface-2:#E6EAFF; --brand:#2D4BFF; --brand-deep:#1A2FB5; --brand-ink:#FFFFFF; --brand-text:#2D4BFF;
  --hl-ink:#101642; --rec-deep:#A9133F; --ok:#087F63; --ok-bg:#DDF6EE; --focus:#101642;
  --shadow:0 1px 2px rgba(16,22,66,.06),0 12px 32px rgba(16,22,66,.10); --r:20px;
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{scrollbar-color:var(--cobalt) var(--night)}
body{background:var(--paper);color:var(--ink);font:400 1.0625rem/1.55 var(--f-body);caret-color:var(--cobalt);overflow-x:hidden}
::selection{background:var(--hl);color:var(--ink)}
:focus-visible{outline:3px solid var(--hl);outline-offset:3px;border-radius:6px}
.light :focus-visible{outline-color:var(--ink)}
h1,h2,h3{font-family:var(--f-display);font-stretch:84%;font-weight:800;line-height:1;letter-spacing:-.02em;margin:0;text-wrap:balance}
h2{font-size:clamp(2.3rem,5.6vw,4.4rem)}
p{margin:0}
a{color:inherit;text-underline-offset:.2em}
button,input,select{font:inherit;color:inherit}
.wrap{max-width:1120px;margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.ic{width:1.2em;height:1.2em;flex:none;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.num{font-variant-numeric:tabular-nums}
.w{display:inline-block;padding:0 .08em;margin:0 -.08em;border-radius:.16em;transition:background .18s,color .18s,transform .25s cubic-bezier(.16,1,.3,1)}
.w.on{background:var(--hl);color:var(--ink);transform:rotate(-1.5deg) scale(1.03)}
@media (hover:hover){[data-split] .w:hover{background:var(--hl);color:var(--ink);transform:rotate(-1.5deg) scale(1.03)}}

/* nav */
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--night)}
.nav{position:sticky;top:env(safe-area-inset-top,0px);z-index:29;background:var(--night);color:var(--white)}
.nav-in{display:flex;align-items:center;gap:22px;height:var(--nav)}
.logo{font:800 1.35rem/1 var(--f-display);letter-spacing:-.03em;text-decoration:none;white-space:nowrap;margin-right:auto}
.logo .two{display:inline-block;background:var(--hl);color:var(--ink);padding:.08em .22em;margin:0 .04em;border-radius:.22em;transform:rotate(-4deg)}
.nav nav{display:flex;gap:2px}
.nav nav a{padding:8px 12px;border-radius:10px;font-weight:600;text-decoration:none;color:var(--soft);white-space:nowrap}
.nav nav a:hover{color:var(--ink);background:var(--hl)}
.progress{position:absolute;left:0;right:0;bottom:0;height:4px;background:var(--hl);transform:scaleX(0);transform-origin:0 50%}


/* keys */
.key{--k:var(--soft);--kd:var(--line);--kt:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:48px;padding:.6em 1.2em;border:0;border-radius:14px;background:var(--k);color:var(--kt);font:700 1rem/1.1 var(--f-body);box-shadow:0 4px 0 var(--kd);cursor:pointer;text-decoration:none;transition:transform .08s,box-shadow .08s,filter .12s;margin-bottom:4px;will-change:transform}
.key:hover{filter:brightness(1.06)}
.key:active{transform:translateY(3px);box-shadow:0 1px 0 var(--kd)}
.key.hl{--k:var(--hl);--kd:var(--hl-deep);--kt:var(--ink)}
.key.cobalt{--k:var(--cobalt);--kd:var(--cobalt-deep);--kt:#fff}
.key.dark{--k:var(--ink);--kd:#000;--kt:#fff}
.key.ghost{--k:rgba(255,255,255,.14);--kd:rgba(8,16,90,.55);--kt:#fff}
.key.big{min-height:60px;font-size:1.15rem;padding-inline:1.6em}
.key[data-magnet]{transition:box-shadow .08s,filter .12s}
.key.sm{min-height:40px;padding:.4em .9em;font-size:.94rem}
.row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* hero */
.hero{position:relative;background:var(--cobalt);color:var(--white);overflow:hidden}
#wave{position:absolute;left:0;right:0;bottom:64px;width:100%;height:46%;pointer-events:none}
.hero-in{position:relative;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:40px;align-items:center;padding-block:72px 120px}
.hero h1{font-size:clamp(3.4rem,11vw,7.5rem);font-stretch:78%;line-height:.92;letter-spacing:-.025em}
.hero h1 .w{padding:0 .1em;transition:background .18s,color .18s}
.lede{font-size:1.25rem;line-height:1.5;color:var(--soft);max-width:36ch;margin-top:26px}
.hero .row{margin-top:30px}
.flips{position:relative;display:grid;gap:16px;justify-items:start}
.flip{display:grid;gap:3px;padding:18px 24px;border-radius:20px 20px 20px 6px;background:var(--white);color:var(--ink);box-shadow:0 18px 40px rgba(8,16,90,.35);cursor:pointer;border:0;text-align:left;font-weight:700;font-size:1.4rem;will-change:transform}
.flip:nth-child(2){margin-left:22%;border-radius:20px 20px 6px 20px}
.flip:nth-child(3){margin-left:6%}
.flip:nth-child(4){margin-left:30%;border-radius:20px 20px 6px 20px}
.flip .es{font-size:.95rem;font-weight:600;color:var(--ink-2)}
.flip .bad{text-decoration:underline wavy var(--rec) 2px;text-underline-offset:.22em;transition:opacity .3s,font-size .3s}
.flip .good{display:flex;align-items:center;gap:8px;color:var(--mint-ink);max-height:0;opacity:0;overflow:hidden;transition:max-height .4s cubic-bezier(.16,1,.3,1),opacity .3s}
.flip .good .ic{background:var(--mint);color:#fff;border-radius:50%;padding:3px;width:1.1em;height:1.1em;stroke-width:3.4}
.flip.fixed .bad{text-decoration:line-through;text-decoration-color:var(--rec);opacity:.5;font-size:.92rem}
.flip.fixed .good{max-height:3em;opacity:1}
.marquee{position:relative;background:var(--hl);color:var(--ink);overflow:hidden;white-space:nowrap;font:800 1.5rem/1 var(--f-display);font-stretch:84%}
.marquee-track{display:inline-flex;gap:28px;align-items:center;padding-block:20px;animation:mq 38s linear infinite;will-change:transform}
.marquee-track svg{width:22px;height:22px;flex:none;fill:var(--ink)}
@keyframes mq{to{transform:translateX(-50%)}}
@media (max-width:900px){.hero-in{grid-template-columns:minmax(0,1fr);padding-block:44px 150px}.flip{font-size:1.05rem;padding:14px 18px}}

/* unlearn scene */
.unlearn{background:var(--paper)}
.un-in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:56px;align-items:center;padding-block:72px}
.steps{list-style:none;margin:34px 0 0;padding:0;display:grid;gap:18px;counter-reset:s}
.steps li{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;counter-increment:s;transition:opacity .3s}
.steps li::before{content:counter(s);display:grid;place-items:center;width:46px;height:46px;border-radius:13px;background:var(--soft);color:var(--ink);font:800 1.35rem/1 var(--f-display);transition:background .3s,transform .4s cubic-bezier(.16,1,.3,1)}
.steps li.on::before{background:var(--hl);transform:rotate(-6deg) scale(1.08)}
.steps h3{font-size:1.5rem;margin-bottom:3px}
.steps p{color:var(--ink-2);max-width:44ch}
.un-stage{position:relative;min-height:440px}
.sheet{position:absolute;inset:0 8% 6% 0;background:var(--white);border-radius:10px;padding:26px 28px;box-shadow:0 12px 34px rgba(16,22,66,.12);font-family:Georgia,"Times New Roman",serif;color:#3a3f63;transform:translate(-70px,-30px) rotate(-13deg) scale(.82);opacity:.35;transform-origin:50% 60%}
.sheet h3{font:700 1.15rem/1.2 Georgia,serif;letter-spacing:0;margin-bottom:14px;color:#3a3f63}
.sheet table{border-collapse:collapse;width:100%;font-size:.95rem;margin-bottom:16px}
.sheet td{border:1px solid #c9cde3;padding:6px 10px}
.sheet ol{margin:0;padding-left:1.3em;display:grid;gap:9px;font-size:.98rem}
.sheet u{text-decoration:none;display:inline-block;min-width:4.5em;border-bottom:1.5px solid #3a3f63}
.strike{position:absolute;left:-4%;right:-4%;top:46%;height:9px;border-radius:5px;background:var(--rec);transform:rotate(-9deg) scaleX(1);transform-origin:0 50%}
.voice{position:absolute;left:10%;right:0;bottom:0;background:var(--cobalt);color:#fff;border-radius:22px;padding:26px;box-shadow:0 30px 60px rgba(26,47,181,.4);display:grid;gap:16px}
.voice .cnt{display:flex;align-items:baseline;gap:12px}
.voice .cnt b{font:800 4.2rem/1 var(--f-display);font-stretch:84%;color:var(--hl)}
.voice .cnt span{color:var(--soft);font-weight:600}
.voice .vk{font:800 clamp(1.5rem,3vw,2.1rem)/1.25 var(--f-display);font-stretch:84%}
.eq{display:flex;gap:4px;align-items:flex-end;height:44px}
.eq i{flex:1;max-width:8px;border-radius:4px;background:rgba(255,255,255,.55);height:30%;animation:eq 1s ease-in-out infinite}
@keyframes eq{0%,100%{height:22%}50%{height:100%}}
@media (max-width:900px){.un-in{grid-template-columns:minmax(0,1fr);gap:36px;padding-block:52px}.un-stage{min-height:400px}}

/* films */
.films{background:var(--night);color:#fff;padding-block:84px}
.films .sub{color:var(--soft);max-width:60ch;margin-top:14px;font-size:1.12rem}
.f-grid{display:grid;grid-template-columns:300px minmax(0,1fr);gap:44px;align-items:center}
.ftabs{display:grid;gap:8px;margin:26px 0 22px}
.ftabs button{text-align:left}
@media (max-width:900px){.f-grid{grid-template-columns:minmax(0,1fr);gap:24px}.ftabs{display:flex;flex-wrap:wrap}}
.ftabs button{border:2px solid var(--night-2);background:var(--night-2);color:var(--soft);padding:10px 16px;border-radius:12px;font-weight:700;cursor:pointer}
.ftabs button[aria-selected="true"]{background:var(--hl);border-color:var(--hl);color:var(--ink)}
.theatre{perspective:1400px}
.screen{position:relative;container-type:inline-size;aspect-ratio:16/10;border-radius:22px;background:var(--paper);color:var(--ink);overflow:hidden;box-shadow:0 40px 90px rgba(0,0,0,.5),0 0 0 8px var(--night-2);will-change:transform}
.film{position:absolute;inset:0;font-size:13px;font-size:1.86cqw;padding:1.6em 2em;display:flex;flex-direction:column;gap:1.1em}
video.film{padding:0;width:100%;height:100%;object-fit:cover;background:var(--paper)}
.f-top{display:flex;justify-content:space-between;align-items:center}
.f-top b{font:800 1.7em/1 var(--f-display);font-stretch:84%}
.pill{display:inline-flex;align-items:center;gap:.35em;padding:.35em .8em;border-radius:99em;background:var(--soft);font-weight:700}
.pill .ic{color:var(--cobalt)}
.fa-body{flex:1;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:1.6em;min-height:0}
.fa-chat{display:flex;flex-direction:column;gap:.7em}
.fbub{max-width:82%;padding:.6em .95em;border-radius:1.2em;font-size:1.15em;font-weight:500;line-height:1.3}
.fbub.t{background:var(--soft);align-self:flex-start;border-bottom-left-radius:.3em}
.fbub.me{background:var(--cobalt);color:#fff;align-self:flex-end;border-bottom-right-radius:.3em}
.ffix{align-self:flex-end;max-width:88%;background:var(--note-bg);border-radius:1em;padding:.6em .95em;line-height:1.3}
.ffix b{color:var(--note);display:block}
.fa-side{display:flex;flex-direction:column;gap:1em;align-items:stretch}
.fhint{background:var(--white);border-radius:1em;padding:.9em;display:grid;gap:.5em;box-shadow:0 .4em 1.2em rgba(16,22,66,.1)}
.fhint span{font-size:.85em;font-weight:700;color:var(--ink-2)}
.fhint b{font:800 1.3em/1.2 var(--f-display);font-stretch:84%}
.fchips{display:flex;flex-wrap:wrap;gap:.4em}
.fchips i{font-style:normal;font-weight:700;padding:.35em .7em;border-radius:.6em;background:var(--paper);box-shadow:0 .2em 0 var(--line)}
.fmic{margin:auto auto 0;position:relative;width:4.2em;height:4.2em;border-radius:50%;background:var(--rec);color:#fff;display:grid;place-items:center}
.fmic .ic{width:1.9em;height:1.9em}
.fmic .ring{position:absolute;inset:0;border-radius:50%;border:.25em solid var(--rec);opacity:0}
.f-q{font-size:1.15em;color:var(--ink-2)}
.f-tray{display:flex;flex-wrap:wrap;gap:.6em;min-height:4.6em;padding:.8em;border-radius:1em;border:.16em dashed var(--line)}
.f-pool{display:flex;flex-wrap:wrap;gap:.6em}
.ft{display:inline-block;padding:.55em 1em;border-radius:.75em;background:var(--soft);box-shadow:0 .28em 0 var(--line);font-weight:700;font-size:1.3em;will-change:transform}
.f-tray .ft{visibility:hidden}
.f-res{align-self:flex-start;background:var(--mint-bg);color:var(--mint-ink);font-weight:700;font-size:1.15em;padding:.7em 1em;border-radius:.9em}
.f-burst{position:absolute;left:50%;top:38%;width:0;height:0}
.f-burst i{position:absolute;width:.9em;height:.5em;border-radius:.15em;opacity:0}
.f-modes{display:flex;gap:.4em}
.f-modes i{font-style:normal;font-weight:700;padding:.4em .8em;border-radius:.7em;background:var(--white);border:.14em solid var(--line)}
.f-modes i.on{background:var(--hl);border-color:var(--hl)}
.f-k{font:800 3.3em/1.2 var(--f-display);font-stretch:84%;letter-spacing:-.02em;margin-block:auto .2em}
.f-k .fw{padding:0 .1em;border-radius:.18em}
.f-k .fw.on{background:var(--hl)}
.f-k .fw.hit{color:var(--mint-ink)}
.f-k .fw.miss{text-decoration:underline wavy var(--rec) .08em;text-underline-offset:.2em}
.f-waves{display:grid;gap:.5em}
.f-wave{display:flex;gap:.3em;align-items:center;height:2.6em;opacity:.25;transition:opacity .2s}
.f-wave span{width:5.2em;font-weight:700;font-size:.9em;color:var(--ink-2)}
.f-wave i{flex:1;border-radius:99em;background:var(--cobalt);height:18%}
.f-wave.you i{background:var(--rec)}
.f-wave[data-play="1"]{opacity:1}
.f-wave[data-play="1"] i{animation:eq .7s ease-in-out infinite}
.f-meter{display:grid;grid-template-columns:auto 1fr auto;gap:1em;align-items:center;font-weight:700;margin-bottom:auto}
.f-meter .bar{height:.9em;border-radius:99em;background:var(--line);overflow:hidden}
.f-meter .bar i{display:block;height:100%;width:86%;border-radius:99em;background:var(--mint)}
.f-meter b{font:800 1.5em/1 var(--f-display)}
.fctl{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:16px;align-items:center;margin-top:22px}
.fctl button{width:52px;height:52px;border-radius:50%;border:0;background:var(--hl);color:var(--ink);display:grid;place-items:center;cursor:pointer;box-shadow:0 4px 0 var(--hl-deep)}
.fctl button:active{transform:translateY(3px);box-shadow:0 1px 0 var(--hl-deep)}
.fctl button .ic{width:22px;height:22px;fill:currentColor;stroke-width:1.5}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:8px;border-radius:4px;background:var(--night-2);cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--hl);border:0;box-shadow:0 2px 0 var(--hl-deep)}
input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--hl);border:0}
.ftime{color:var(--soft);font-weight:600;min-width:6.5ch;text-align:right}
.fcap{color:var(--soft);min-height:6.2em}
@container (max-width:560px){.film{font-size:3.3cqw;padding:1.3em 1.4em}.fa-body{grid-template-columns:minmax(0,1fr)}.fhint .fchips{display:none}.fmic{display:none}.f-k{font-size:2.5em}}
@media (max-width:640px){.screen{aspect-ratio:4/4.3}.films{padding-block:56px}}

/* playground */
.try{padding-block:84px}
.try .sub{color:var(--ink-2);max-width:60ch;margin-top:14px;font-size:1.12rem}
.toys{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:24px;margin-top:34px;align-items:start}
.toy{background:var(--white);border-radius:22px;padding:28px;box-shadow:0 14px 40px rgba(16,22,66,.1);display:grid;gap:16px}
.toy h3{font-size:1.9rem}
.toy p{color:var(--ink-2)}
.field{width:100%;min-height:54px;padding:12px 16px;border-radius:14px;border:2px solid var(--line);background:var(--paper);font-size:1.1rem;font-weight:500}
.field:focus-visible{outline-offset:1px;border-color:var(--cobalt)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{border:2px solid var(--line);background:var(--white);border-radius:99px;padding:6px 14px;font-weight:600;cursor:pointer}
.chip:hover{border-color:var(--cobalt)}
.caught{font:800 1.5rem/1.35 var(--f-display);font-stretch:84%;min-height:1.4em;overflow-wrap:anywhere}
.caught mark{background:none;color:var(--bad);text-decoration:underline wavy var(--rec) 2px;text-underline-offset:.2em}
.fixes{display:grid;gap:10px}
.fixc{background:var(--note-bg);border-radius:14px;padding:12px 16px;display:grid;gap:2px}
.fixc b{color:var(--note)}
.fixc span{color:var(--ink)}
.fixc small{color:var(--ink-2);font-size:.9rem}
.clean{background:var(--mint-bg);color:var(--mint-ink);border-radius:14px;padding:12px 16px;font-weight:700}
.g-top{display:flex;justify-content:space-between;align-items:center;gap:12px}
.dots{display:flex;gap:6px}
.dots i{width:28px;height:10px;border-radius:5px;background:var(--line)}
.dots i.d{background:var(--mint)}.dots i.c{background:var(--hl)}
.tray{min-height:70px;display:flex;flex-wrap:wrap;gap:8px;align-content:flex-start;padding:10px;border-radius:14px;border:2px dashed var(--line);transition:border-color .2s,background .2s}
.tray.ok{border-color:var(--mint);background:var(--mint-bg)}
.pool{display:flex;flex-wrap:wrap;gap:8px;min-height:56px}
.tile{border:0;min-height:46px;padding:8px 16px;border-radius:12px;background:var(--soft);color:var(--ink);box-shadow:0 4px 0 var(--line);font:700 1.1rem/1 var(--f-body);cursor:pointer;margin-bottom:4px;will-change:transform}
.tile:active{box-shadow:0 1px 0 var(--line)}
.tray.ok .tile{background:var(--white);color:var(--mint-ink);box-shadow:0 4px 0 var(--mint)}
.gmsg{min-height:1.6em;font-weight:700}
.gmsg.ok{color:var(--mint-ink)}.gmsg.no{color:var(--bad)}
@media (max-width:900px){.toys{grid-template-columns:minmax(0,1fr)}.try{padding-block:56px}}

/* week */
.week{background:var(--white);padding-block:76px 64px}
.wk-view{overflow-x:auto;scroll-snap-type:x proximity;margin-top:34px;scrollbar-width:thin}
.week.pinned .wk-view{overflow:hidden}
.wk-track{display:flex;gap:20px;width:max-content;padding-inline:max(16px,calc((100vw - 1120px)/2 + 16px));padding-block:8px 28px}
.dcard{width:min(78vw,330px);flex:none;scroll-snap-align:center;background:var(--paper);border-radius:22px;padding:24px;display:grid;gap:12px;align-content:start}
.dcard .n{font:800 5.4rem/.85 var(--f-display);font-stretch:78%;color:var(--cobalt)}
.dcard h3{font-size:1.6rem}
.dcard p{color:var(--ink-2)}
.dcard ul{list-style:none;margin:6px 0 0;padding:0;display:grid;gap:8px}
.dcard li{display:flex;gap:10px;align-items:center;font-weight:600;background:var(--white);border-radius:12px;padding:9px 12px}
.dcard li::before{content:"";width:12px;height:12px;border-radius:4px;background:var(--cobalt);flex:none}
.dcard li:nth-child(2)::before{background:var(--rec);border-radius:50%}
.dcard li:nth-child(3)::before{background:var(--hl-deep);transform:rotate(45deg)}
.dcard.last{background:var(--hl)}
.dcard.last .n,.dcard.last p{color:var(--ink)}
.wk-line{height:8px;border-radius:4px;background:var(--line);overflow:hidden}
.wk-line i{display:block;height:100%;background:var(--cobalt);transform:scaleX(0);transform-origin:0 50%}
.week:not(.pinned) .wk-line{display:none}

/* accents */
.accents{background:var(--cobalt);color:#fff;padding-block:84px;text-align:center}
.ac-line{font:800 clamp(2rem,6.4vw,4.6rem)/1.12 var(--f-display);font-stretch:80%;letter-spacing:-.02em;margin:38px auto 34px;max-width:16ch}
.ac-row{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.ac{display:grid;gap:10px;justify-items:center;padding:16px 18px;min-width:118px;border-radius:18px;border:0;background:rgba(255,255,255,.12);color:#fff;font-weight:700;cursor:pointer;box-shadow:0 4px 0 rgba(8,16,90,.5);transition:background .2s;will-change:transform}
.ac:active{transform:translateY(3px)}
.ac[aria-pressed="true"]{background:var(--hl);color:var(--ink);box-shadow:0 4px 0 var(--hl-deep)}
.ac svg{width:64px;height:46px;border-radius:8px;overflow:hidden;box-shadow:0 0 0 2px rgba(255,255,255,.35)}
.ac-note{color:var(--soft);margin:26px auto 0;max-width:58ch;min-height:3.2em}

/* plans */
.plans{background:var(--hl);color:var(--ink);padding-block:84px}
.plans .sub{max-width:54ch;margin-top:14px;font-size:1.12rem}
.pgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-block:34px}
.plan{background:var(--white);border-radius:22px;padding:26px;display:grid;gap:10px;align-content:start}
.plan.first{background:var(--ink);color:#fff}
.plan h3{font-size:1.6rem}
.plan .price{font:800 1.5rem/1.1 var(--f-display);font-stretch:84%;color:var(--cobalt)}
.plan.first .price{color:var(--hl)}
.plan ul{margin:0;padding-left:1.1em;display:grid;gap:5px;color:var(--ink-2)}
.plan.first ul{color:var(--soft)}
@media (max-width:900px){.pgrid{grid-template-columns:minmax(0,1fr)}.plans,.accents{padding-block:56px}}
footer{background:var(--night);color:var(--soft);padding-block:34px 44px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;align-items:center}
#fx{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:40}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---------- practice rooms ---------- */
/* keys and chips */
.key{--k:var(--surface-2);--kd:var(--line);--kt:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:.5em;min-height:46px;padding:.55em 1.15em;border:0;border-radius:14px;background:var(--k);color:var(--kt);font:700 1rem/1.1 var(--f-body);box-shadow:0 4px 0 var(--kd);cursor:pointer;text-decoration:none;transition:transform .08s,box-shadow .08s,filter .12s;margin-bottom:4px}
.key:hover{filter:brightness(1.05)}
.key:active{transform:translateY(3px);box-shadow:0 1px 0 var(--kd)}
.key[disabled]{opacity:.45;cursor:not-allowed;filter:none}
.key[disabled]:active{transform:none;box-shadow:0 4px 0 var(--kd)}
.key.primary{--k:var(--brand);--kd:var(--brand-deep);--kt:var(--brand-ink)}
.key.hl{--k:var(--hl);--kd:var(--hl-deep);--kt:var(--hl-ink)}
.key.rec{--k:var(--rec);--kd:var(--rec-deep);--kt:#fff}
.key.big{min-height:58px;font-size:1.12rem;padding-inline:1.5em}
.key.round{width:52px;padding:0;border-radius:50%}
.key.listening{--k:var(--rec);--kd:var(--rec-deep);--kt:#fff;animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 4px 0 var(--rec-deep),0 0 0 10px rgba(224,36,94,.18)}}
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:6px 14px;border-radius:999px;border:2px solid var(--line);background:var(--surface);color:var(--ink);font-weight:600;cursor:pointer}
.chip:hover{border-color:var(--ink-2)}
.chip[aria-pressed="true"]{border-color:var(--brand);background:var(--surface-2)}
.flag{width:26px;height:18px;border-radius:4px;overflow:hidden;flex:none;box-shadow:0 0 0 1px rgba(16,22,66,.15)}
.mic-only,.ai-only{display:none!important}
.has-mic .mic-only{display:inline-flex!important}
.has-mic .nomic-only{display:none!important}
.has-ai .ai-only{display:inline-flex!important}
.has-ai .noai-only{display:none!important}
.tag{display:inline-block;font-size:.76rem;font-weight:700;padding:2px 8px;border-radius:8px;background:var(--surface-2);color:var(--ink-2);vertical-align:middle}
.tag.live{background:var(--ok-bg);color:var(--ok)}
.muted{color:var(--ink-2)}
.small{font-size:.9rem}

/* karaoke words */
.kline{font:700 clamp(1.5rem,3.6vw,2.3rem)/1.35 var(--f-display);letter-spacing:-.02em}
.kw{padding:.02em .14em;margin:0 -.04em;border-radius:.24em;transition:background .14s,color .14s}
.kw.on{background:var(--hl);color:var(--hl-ink)}
.kw.hit{color:var(--ok)}
.kw.miss{text-decoration:underline wavy var(--bad) 2px;text-underline-offset:.22em}

/* app views */
.view{padding-block:36px 64px}
.vh{display:grid;gap:8px;margin-bottom:26px}
.vh h1{font-size:clamp(2rem,4.6vw,3rem);font-weight:800}
.vh p{color:var(--ink-2);max-width:62ch;font-size:1.08rem}
.panel{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow);padding:22px}
.panel h2{font-size:1.2rem;margin-bottom:12px}
.stack{display:grid;gap:18px;align-content:start}
.cols{display:grid;grid-template-columns:290px minmax(0,1fr);gap:22px;align-items:start}
.cols.even{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr)}
@media (max-width:900px){.cols,.cols.even{grid-template-columns:minmax(0,1fr)}}
.side h2{font-size:1rem;margin-bottom:10px}
.side .seg{display:grid;grid-template-columns:repeat(3,1fr)}
.side .seg button{padding-inline:6px}
.side .chips{flex-direction:column;align-items:stretch}
.side .chip{justify-content:flex-start;border-radius:12px}
@media (max-width:900px){.side .chips{flex-direction:row}.side .chip{border-radius:999px}}

/* speech mode */
.chat{display:grid;gap:12px;align-content:start;min-height:300px;max-height:52vh;overflow-y:auto;padding:4px 2px 8px}
.msg{max-width:min(78%,520px);padding:11px 15px;border-radius:18px;font-size:1.06rem;line-height:1.4;overflow-wrap:anywhere}
.msg.t{background:var(--surface-2);justify-self:start;border-bottom-left-radius:5px}
.msg.me{background:var(--brand);color:var(--brand-ink);justify-self:end;border-bottom-right-radius:5px}
.msg.sys{justify-self:center;max-width:100%;background:none;color:var(--ink-2);font-size:.92rem;padding:2px 8px;text-align:center}
.fix{justify-self:end;max-width:min(88%,560px);background:var(--note-bg);color:var(--ink);border-radius:14px;padding:11px 15px;font-size:.96rem;display:grid;gap:3px}
.fix b{color:var(--note)}
.typing{display:inline-flex;gap:5px;padding:4px 0}
.typing i{width:8px;height:8px;border-radius:50%;background:var(--ink-2);animation:blink 1s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.hint{background:var(--ground);border-radius:14px;padding:14px;display:grid;gap:10px}
.hint .lv{font-size:.82rem;font-weight:700;color:var(--ink-2)}
.hint .starter{font:700 1.2rem/1.3 var(--f-display)}
.wordbank{display:flex;flex-wrap:wrap;gap:6px}
.wordbank button{border:0;padding:7px 12px;border-radius:10px;background:var(--surface);box-shadow:0 3px 0 var(--line);font-weight:700;cursor:pointer}
.wordbank button:active{transform:translateY(2px);box-shadow:0 1px 0 var(--line)}
.composer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center}
.has-mic .composer{grid-template-columns:auto minmax(0,1fr) auto}
.field{width:100%;min-height:48px;padding:10px 14px;border-radius:14px;border:2px solid var(--line);background:var(--surface);color:var(--ink)}
.field::placeholder{color:var(--ink-2);opacity:1}
.field:focus-visible{outline-offset:1px;border-color:var(--brand)}
.tally{display:flex;gap:22px;flex-wrap:wrap}
.tally div{display:grid}
.tally b{font:800 1.6rem/1 var(--f-display)}
.tally span{font-size:.86rem;color:var(--ink-2)}
label.tog{display:flex;align-items:center;gap:10px;font-weight:600;cursor:pointer}
label.tog input{width:20px;height:20px;accent-color:var(--brand)}

/* games */
.seg{display:inline-flex;flex-wrap:wrap;gap:4px;padding:4px;border-radius:14px;background:var(--surface-2)}
.seg button{border:0;background:none;padding:9px 16px;border-radius:10px;font-weight:700;color:var(--ink-2);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px rgba(16,22,66,.15)}
.game{max-width:760px;display:grid;gap:22px}
.prog{display:flex;gap:6px}
.prog i{flex:1;height:10px;border-radius:5px;background:var(--line)}
.prog i.d{background:var(--ok)}.prog i.m{background:var(--bad)}.prog i.c{background:var(--hl)}
.gtop{display:flex;justify-content:space-between;align-items:center;gap:12px;font-weight:700}
.prompt{font:800 clamp(1.5rem,3.6vw,2.2rem)/1.2 var(--f-display);letter-spacing:-.02em}
.tray{min-height:68px;display:flex;flex-wrap:wrap;gap:8px;align-content:flex-start;padding:10px;border-radius:14px;border:2px dashed var(--line)}
.pool{display:flex;flex-wrap:wrap;gap:8px;min-height:56px}
.tile{border:0;min-height:46px;padding:8px 16px;border-radius:12px;background:var(--surface-2);color:var(--ink);box-shadow:0 4px 0 var(--line);font:700 1.1rem/1 var(--f-body);cursor:pointer;margin-bottom:4px;transition:transform .08s,box-shadow .08s}
.tile:active{transform:translateY(3px);box-shadow:0 1px 0 var(--line)}
.tile.gone{visibility:hidden}
.tile.right{background:var(--ok-bg);color:var(--ok);box-shadow:0 4px 0 var(--ok)}
.tile.wrong{background:var(--bad-bg);color:var(--bad);box-shadow:0 4px 0 var(--bad)}
.gap{display:inline-block;min-width:3.2em;padding:0 .3em;border-bottom:4px solid var(--brand);text-align:center;color:var(--brand-text)}
.fb{border-radius:14px;padding:14px 16px;display:grid;gap:4px;font-weight:600}
.fb.ok{background:var(--ok-bg);color:var(--ok)}
.fb.bad{background:var(--bad-bg);color:var(--bad)}
.fb.info{background:var(--note-bg);color:var(--note)}
.fb span{font-weight:500;color:var(--ink)}
.heard{font-style:italic;color:var(--ink-2);min-height:1.5em}

/* shadowing */
.stage{display:grid;gap:22px}
.stepper{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0;counter-reset:m}
.stepper button{counter-increment:m;display:inline-flex;gap:10px;align-items:center;border:2px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 14px 8px 8px;font-weight:700;cursor:pointer}
.stepper button::before{content:counter(m);display:grid;place-items:center;width:28px;height:28px;border-radius:8px;background:var(--surface-2);font:800 .95rem/1 var(--f-display)}
.stepper button[aria-pressed="true"]{border-color:var(--brand)}
.stepper button[aria-pressed="true"]::before{background:var(--hl);color:var(--hl-ink)}
.score{font:800 2.4rem/1 var(--f-display)}

/* sprint */
.todaybar{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:center}
.pips{display:flex;gap:14px;flex-wrap:wrap}
.pip{display:inline-flex;align-items:center;gap:8px;font-weight:600}
.pip i{width:22px;height:22px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;color:transparent}
.pip.d i{background:var(--ok);border-color:var(--ok);color:var(--surface)}
.pip .ic{width:14px;height:14px;stroke-width:3}
.meter{height:12px;border-radius:6px;background:var(--line);overflow:hidden}
.meter i{display:block;height:100%;background:var(--brand);border-radius:6px;transition:width .5s cubic-bezier(.16,1,.3,1)}
.days{display:grid;gap:12px}
details.day{background:var(--surface);border-radius:var(--r);box-shadow:var(--shadow)}
details.day summary{list-style:none;display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:16px 20px;cursor:pointer;border-radius:var(--r)}
details.day summary::-webkit-details-marker{display:none}
.dn{display:grid;place-items:center;width:52px;height:52px;border-radius:14px;background:var(--surface-2);font:800 1.05rem/1 var(--f-display);text-align:center}
details.day.done .dn{background:var(--ok);color:var(--surface)}
details.day[open] .dn{background:var(--hl);color:var(--hl-ink)}
details.day summary h3{font-size:1.2rem}
details.day summary p{color:var(--ink-2);font-size:.95rem}
.count{font-weight:700;color:var(--ink-2)}
.tasks{list-style:none;margin:0;padding:0 20px 18px;display:grid;gap:8px}
.tasks li{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:10px 12px;border-radius:12px;background:var(--ground)}
.tasks input{width:22px;height:22px;accent-color:var(--ok)}
.tasks label{font-weight:500;cursor:pointer}
.tasks li.d label{text-decoration:line-through;color:var(--ink-2)}
.tasks a{font-weight:700;white-space:nowrap}
.timer{font:800 clamp(2.6rem,8vw,4rem)/1 var(--f-display);font-variant-numeric:tabular-nums}

/* tutor */
.errs{display:grid;gap:14px}
.err{display:grid;gap:6px}
.err .h{display:flex;justify-content:space-between;gap:12px;font-weight:700}
.err .bar{height:10px;border-radius:5px;background:var(--line)}
.err .bar i{display:block;height:100%;border-radius:5px;background:var(--rec)}
.err p{font-size:.94rem;color:var(--ink-2)}
.tbl{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:.82rem;color:var(--ink-2);font-weight:700}
td.t{white-space:nowrap;color:var(--ink-2)}
.empty{color:var(--ink-2);padding:8px 0}


.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translate(-50%,20px);background:var(--ink);color:var(--ground);padding:10px 18px;border-radius:999px;font-weight:700;opacity:0;pointer-events:none;transition:opacity .2s,transform .3s cubic-bezier(.16,1,.3,1);z-index:20;max-width:calc(100vw - 32px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- merged site: nav, view bands, course ---------- */
.nav-in{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:6px 18px;height:auto;min-height:var(--nav);padding-block:7px}
.logo{margin-right:0}
.tabs{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;min-width:0}
.tabs::-webkit-scrollbar{display:none}
.nav .tabs a{padding:8px 9px;font-size:.95rem}
.nav .tabs a[aria-current="page"]{background:var(--hl);color:var(--ink)}
.stats{display:flex;gap:8px;align-items:center}
.stat{display:inline-flex;align-items:center;gap:5px;padding:6px 10px;border-radius:999px;background:var(--night-2);color:#fff;font-weight:700;font-size:.92rem;white-space:nowrap}
.stat .ic{color:var(--hl)}
.stat.bump{animation:bump .5s cubic-bezier(.16,1,.3,1)}
@keyframes bump{0%{transform:scale(1)}35%{transform:scale(1.2);background:var(--hl);color:var(--ink)}100%{transform:scale(1)}}
@media (max-width:1000px){
  .nav-in{grid-template-columns:minmax(0,1fr) auto}
  .tabs{grid-column:1/-1;grid-row:2;margin-inline:-6px;padding-right:28px;-webkit-mask-image:linear-gradient(90deg,#000 calc(100% - 36px),transparent);mask-image:linear-gradient(90deg,#000 calc(100% - 36px),transparent)}
}
.view{padding-block:0 76px}
.vh{background:var(--cobalt);color:#fff;padding-block:46px 42px;margin-bottom:30px;box-shadow:0 0 0 100vmax var(--cobalt);clip-path:inset(0 -100vmax)}
.vh h1{font-size:clamp(2.7rem,7.4vw,4.8rem);font-stretch:80%}
.vh p{color:var(--soft);font-size:1.15rem}
.view a:not(.key){color:var(--brand-text)}
.result{min-height:1.5em;font-weight:600}
.result.ok{color:var(--ok)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:760px}
.form .full{grid-column:1/-1}
.form label{display:grid;gap:6px;font-weight:600}
.form label span{font-weight:400;color:var(--ink-2);font-size:.9rem}
@media (max-width:640px){.form{grid-template-columns:1fr}}
.wk-head{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;justify-content:space-between}
.course{display:grid;grid-template-columns:270px minmax(0,1fr);gap:22px;align-items:start}
.mods{display:grid;gap:8px}
.mod{display:grid;grid-template-columns:auto 1fr;gap:12px;align-items:center;padding:9px 12px;border-radius:14px;border:2px solid var(--line);background:var(--surface);color:var(--ink);font-weight:700;cursor:pointer;text-align:left}
.mod:hover{border-color:var(--ink-2)}
.mod[aria-pressed="true"]{border-color:var(--brand);background:var(--surface-2)}
.mod .dn{width:40px;height:40px;border-radius:11px;font-size:1rem}
.mod.done .dn{background:var(--ok);color:#fff}
.mod .dn .ic{stroke-width:3}
.phr{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;align-items:center;padding:10px 12px;border-radius:14px;background:var(--ground)}
.phr .kline{font-size:1.3rem;line-height:1.3}
.phr.d{background:var(--ok-bg)}
.trap{background:var(--note-bg);border-radius:14px;padding:14px 16px;display:grid;gap:4px;font-size:1.05rem}
.trap s{color:var(--bad);font-weight:700}
.trap b{color:var(--ok);font-size:1.2rem}
@media (max-width:900px){.course{grid-template-columns:minmax(0,1fr)}.mods{grid-auto-flow:column;grid-auto-columns:max-content;overflow-x:auto;padding-bottom:6px}.phr{grid-template-columns:auto minmax(0,1fr)}.phr [data-said]{grid-column:1/-1}}

/* ---------- crawlable guides, FAQs and articles ---------- */
.guide{background:var(--white);padding-block:60px 70px;border-top:1px solid var(--line)}
.prose{max-width:780px;display:grid;gap:16px;font-size:1.08rem;line-height:1.65}
.prose h2{font-size:clamp(1.7rem,3.6vw,2.3rem);margin-top:22px}
.prose h3{font-size:1.3rem;margin:0}
.prose p,.prose li{color:var(--ink-2)}
.prose strong{color:var(--ink)}
.prose ol,.prose ul{margin:0;padding-left:1.3em;display:grid;gap:8px}
.prose a:not(.key){color:var(--brand-text);font-weight:600}
.prose .tbl{overflow-x:auto}
.prose table{border-collapse:collapse;width:100%;font-size:.98rem}
.prose th,.prose td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
.prose thead th{font-size:.85rem;color:var(--ink-2)}
.prose tbody th{color:var(--ink);white-space:nowrap}
.faq{display:grid;gap:10px}
.faq details{background:var(--paper);border-radius:14px;padding:4px 18px}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink);padding:12px 0;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:800 1.4rem/1 var(--f-display);color:var(--brand-text)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding-bottom:14px}
.src{font-size:.9rem}
.lessons{list-style:none;padding:0!important;gap:14px!important}
.lessons li{background:var(--paper);border-radius:16px;padding:18px 20px;display:grid;gap:6px}
.lessons s,.mistake s{color:var(--bad)}
.updated{font-size:.95rem;font-weight:600;color:var(--ink-2)}
.toc{columns:2;column-gap:28px;display:block!important}
.toc li{break-inside:avoid;margin-bottom:6px}
.mistake{background:var(--white);border-radius:18px;padding:20px 22px;display:grid;gap:10px;scroll-margin-top:90px;box-shadow:0 1px 2px rgba(16,22,66,.06),0 8px 24px rgba(16,22,66,.07)}
.mistake h2{font-size:1.5rem;margin:0}
.pair{display:flex;flex-wrap:wrap;gap:10px}
.pair span{padding:8px 14px;border-radius:12px;font-weight:700;font-size:1.1rem}
.pair .no{background:var(--bad-bg)}
.pair .yes{background:var(--mint-bg);color:var(--mint-ink)}
.pair .yes::before{content:"\2713  "}
@media (max-width:640px){.toc{columns:1}}
footer .foot{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px 48px;align-items:start}
footer .logo{color:#fff}
.foot-brand{display:grid;gap:10px;max-width:36ch}
.foot-nav{display:grid;grid-template-columns:repeat(3,auto);gap:16px 40px}
.foot-nav div{display:grid;gap:8px;align-content:start}
.foot-nav b{color:#fff}
.foot-nav a{color:var(--soft);text-decoration:none}
.foot-nav a:hover{color:var(--hl)}
@media (max-width:760px){footer .foot{grid-template-columns:minmax(0,1fr)}.foot-nav{grid-template-columns:repeat(2,minmax(0,1fr))}}