/* 연습해봐요 · shared styles
   Layout: kid-first pages. The home page is a wall of big picture cards; each practice page is a one-screen bench
   (instruction card, step strip, laundry-room scene) with teacher controls behind a long press.
   Light, quiet colours on purpose. Each practice has one of five room colours and keeps it,
   so a child always meets the same room for the same task. */
:root{
  --wall:#E1EBEA;
  --floor:#C6D2D1;
  --floor-edge:#B0C0BF;
  --card:#FFFFFF;
  --card-quiet:#EEF3F3;
  --ink:#1C2932;
  --ink-2:#465761;
  --ink-3:#74848D;
  --line:#CAD5DA;
  --cue:#EC8A1F;
  --cue-soft:#FDE8CF;
  --cue-ink:#7A4208;
  --go:#1E6B8A;
  --go-deep:#154F67;
  --good:#2D8656;
  --good-soft:#DCF0E3;
  --help-1:#F6D6A2;
  --help-2:#EE9C4B;
  --help-3:#A9541B;
  --teacher:#E3E9EB;
  --veil:rgba(225,235,234,.95);
  --shade:rgba(28,41,50,.42);
  --f-display:"Jua","Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",sans-serif;
  --f-ui:"IBM Plex Sans KR","Apple SD Gothic Neo","Malgun Gothic","Noto Sans KR",system-ui,sans-serif;
  color-scheme:light;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
/* room colours: the wall, the floor, its edge and the veil over the room (start and end screens) */
[data-theme="mint"]{--wall:#E1EBEA;--floor:#C6D2D1;--floor-edge:#B0C0BF;--veil:rgba(225,235,234,.95)}
[data-theme="peach"]{--wall:#F7E5D7;--floor:#E2CCB9;--floor-edge:#CDB29C;--veil:rgba(247,229,215,.95)}
[data-theme="butter"]{--wall:#F3EDD0;--floor:#DDD4AF;--floor-edge:#C8BD94;--veil:rgba(243,237,208,.95)}
[data-theme="sky"]{--wall:#DDE8F4;--floor:#C3D0DF;--floor-edge:#A9B9CC;--veil:rgba(221,232,244,.95)}
[data-theme="lavender"]{--wall:#E8E3F3;--floor:#D0C9E1;--floor-edge:#B8AECF;--veil:rgba(232,227,243,.95)}
html{height:100%;box-sizing:border-box}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;min-height:100%;background:var(--wall);color:var(--ink);font-family:var(--f-ui);font-size:15px;line-height:1.5;-webkit-tap-highlight-color:transparent}
body.practice{height:100%;overflow:hidden;overscroll-behavior:none}
html:has(> body.practice){overscroll-behavior:none}
img{max-width:100%}
[hidden]{display:none!important}
button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation}
a{color:var(--go)}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--go);outline-offset:2px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ================= home ================= */
/* A text menu on the left. To its right the page is a room: children pick a picture card on the wall,
   notes for grown-ups sit on the floor below the baseboard. */
body.is-home{height:100%}
.site{min-height:100%;display:grid;grid-template-columns:clamp(210px,19vw,244px) minmax(0,1fr)}
.side{background:var(--card);border-right:1px solid var(--line)}
.side-in{position:sticky;top:env(safe-area-inset-top,0px);display:flex;flex-direction:column;gap:24px;padding-block:clamp(22px,3vw,32px) 28px;padding-left:max(20px,env(safe-area-inset-left,0px));padding-right:18px}
.menu-btn{display:none;align-items:center;gap:6px;height:42px;padding:0 15px 0 12px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);font-size:15px;font-weight:600;color:var(--ink-2)}
.menu-btn svg{width:20px;height:20px;color:var(--go)}
.side-nav{display:flex;flex-direction:column}
.nav-label{margin:20px 0 4px;padding-left:12px;font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--ink-3)}
.nav-label:first-child{margin-top:0}
.side-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.side-nav a{display:block;padding:7px 12px;border-radius:10px;font-size:16px;font-weight:500;line-height:1.4;color:var(--ink);text-decoration:none;word-break:keep-all}
.side-nav a:hover{background:var(--wall);color:var(--go-deep)}
.home{min-height:100%;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1180px;margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.home-head{padding-block:clamp(22px,3.4vw,34px) 0}
.home-head{display:flex;flex-direction:column;align-items:flex-start;gap:6px}
/* the name is the page's title: the wordmark (연's ㅇ an orange button a finger presses), with the line under it */
.brand-title{margin:0;line-height:0}
.brand-title img{display:block;width:clamp(300px,36vw,440px);height:auto;max-width:100%}
.logo{display:none;border-radius:8px}
.logo img{display:block;height:34px;width:auto}
.tag{margin:0;font-family:var(--f-display);font-size:clamp(19px,2vw,24px);line-height:1.25;color:var(--ink-2);text-wrap:balance;word-break:keep-all}
.home-main{flex:1;display:flex;flex-direction:column}
.picks{padding-block:clamp(16px,2.4vw,24px) clamp(40px,6vw,64px)}
.cards{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(clamp(140px,40vw,220px),1fr));gap:clamp(14px,2.2vw,24px)}
.card{display:flex;flex-direction:column;height:100%;background:var(--card);border-radius:26px;text-decoration:none;color:var(--ink);overflow:hidden;box-shadow:0 1px 0 rgba(28,41,50,.05),0 16px 30px -22px rgba(28,41,50,.6);transition:transform .15s ease,box-shadow .15s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 1px 0 rgba(28,41,50,.05),0 20px 34px -22px rgba(28,41,50,.7)}
.card:active{transform:scale(.97)}
.card-art{position:relative;display:block;margin:10px 10px 0;border-radius:18px;overflow:hidden;aspect-ratio:200/170}
.card-art svg{display:block;width:100%;height:100%}
/* the play dot sits on the picture, so a long name such as 강아지 목욕시키기 gets the card's full width */
.card-name{display:block;padding:12px 16px 16px 18px;font-family:var(--f-display);font-size:clamp(25px,3vw,34px);line-height:1.15;word-break:keep-all;overflow-wrap:anywhere}
.go-dot{position:absolute;right:8px;bottom:8px;width:38px;height:38px;border-radius:50%;background:var(--go);color:#fff;display:grid;place-items:center;box-shadow:0 0 0 3px rgba(255,255,255,.9),0 6px 12px -6px rgba(21,79,103,.8)}
.go-dot svg{width:20px;height:20px;margin-left:2px}
.nojs{margin:0;font-size:16px}
.floor{flex:1;background:var(--floor);border-top:8px solid var(--floor-edge)}
#guide,#about{scroll-margin-top:calc(env(safe-area-inset-top,0px) + 20px)}
.floor-in{padding-block:clamp(28px,4.4vw,52px) 28px;display:flex;flex-direction:column;gap:clamp(30px,4.4vw,48px)}

/* grown-ups' guide: one sheet of paper on the floor */
.paper{container-type:inline-size;background:var(--card);border-radius:24px;padding:clamp(20px,3.4vw,40px);box-shadow:0 1px 0 rgba(28,41,50,.05),0 18px 34px -26px rgba(28,41,50,.55)}
.guide-head{display:flex;flex-direction:column;gap:8px;padding-bottom:clamp(18px,2.6vw,26px)}
.eyebrow{margin:0;font-size:13px;font-weight:600;letter-spacing:.04em;color:var(--go)}
.sec-title{margin:0;font-family:var(--f-display);font-weight:400;font-size:clamp(30px,3.6vw,40px);line-height:1.1;color:var(--ink);text-wrap:balance}
.lead{margin:0;font-size:clamp(15.5px,1.6vw,17px);line-height:1.75;color:var(--ink-2);max-width:62ch;word-break:keep-all}
.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(24px,3.6vw,48px)}
.g-block{min-width:0;display:flex;flex-direction:column;gap:10px;padding-block:clamp(18px,2.4vw,24px);border-top:1px solid var(--line)}
.g-wide{grid-column:1 / -1}
.g-block h3{margin:0;font-size:17px;font-weight:600;line-height:1.4;color:var(--ink)}
.g-block p{margin:0;font-size:15px;line-height:1.75;color:var(--ink-2);max-width:62ch;word-break:keep-all}
.g-block p.note{font-size:13.5px;color:var(--ink-3)}
.num{list-style:none;margin:0;padding:0;counter-reset:n;display:flex;flex-direction:column;gap:9px}
.num li{counter-increment:n;display:grid;grid-template-columns:26px minmax(0,1fr);gap:10px;font-size:15px;line-height:1.65;color:var(--ink-2);word-break:keep-all}
.num li::before{content:counter(n);width:26px;height:26px;border-radius:8px;background:var(--ink);color:#fff;font-size:13px;font-weight:600;line-height:26px;text-align:center;font-variant-numeric:tabular-nums}
.guide .ladder{font-size:14px;gap:6px 8px}
.ladder .lv-wait{background:var(--card);box-shadow:inset 0 0 0 1.5px var(--line)}
.ladder .lv-1{background:var(--help-1)}
.ladder .lv-2{background:var(--help-2)}
.ladder .lv-3{background:var(--help-3);color:#fff}
.pill-teacher{display:inline-flex;align-items:center;gap:5px;margin-inline:2px;padding:1px 10px 1px 7px;border:1px solid var(--line);border-radius:999px;background:var(--card);font-size:13px;font-weight:500;line-height:1.6;color:var(--ink-2);white-space:nowrap;vertical-align:1px}
.pill-teacher svg{width:14px;height:14px;flex:none}
.settings{margin:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:16px clamp(20px,3vw,36px)}
.settings div{min-width:0}
.settings dt{margin:0 0 2px;font-size:15px;font-weight:600;color:var(--ink)}
.settings dd{margin:0;font-size:14.5px;line-height:1.7;color:var(--ink-2);word-break:keep-all}
.legend{margin:0;display:flex;flex-direction:column;gap:7px}
.legend div{display:grid;grid-template-columns:92px minmax(0,1fr);align-items:center;gap:12px}
.legend dt{margin:0}
.legend .code{display:block;min-width:0}
.legend dd{margin:0;font-size:14.5px;line-height:1.5;color:var(--ink-2);word-break:keep-all}
.dots{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,380px),1fr));gap:10px clamp(20px,3vw,36px)}
.dots li{position:relative;min-width:0;padding-left:16px;font-size:15px;line-height:1.7;color:var(--ink-2);word-break:keep-all}
.dots li::before{content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--go)}

/* maker's note and the privacy line, straight on the floor */
.about{display:flex;flex-direction:column;gap:8px;max-width:720px}
.about .sec-title{font-size:clamp(26px,3vw,32px)}
.maker{margin:4px 0 0;font-family:var(--f-display);font-size:clamp(20px,2.2vw,24px);line-height:1.3;color:var(--go-deep)}
.about p:not(.maker){margin:0;font-size:15.5px;line-height:1.8;color:var(--ink);max-width:62ch;word-break:keep-all}
.privacy{padding-top:16px;border-top:1px solid var(--floor-edge)}
.privacy p{margin:0;font-size:14px;color:var(--ink-2);word-break:keep-all}
.privacy .contact{margin-top:6px}
.privacy a{color:inherit;text-decoration:underline;text-underline-offset:3px}
@container (max-width:680px){
  .guide-grid{grid-template-columns:minmax(0,1fr)}
}
@media (min-width:760px){
  .home .wrap{margin-left:0;padding-left:clamp(20px,3vw,40px);padding-right:max(clamp(20px,3vw,40px),env(safe-area-inset-right,0px))}
}
@media (max-width:759px){
  .site{display:block}
  .side{border-right:0;border-bottom:1px solid var(--line)}
  .side-in{position:static;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 12px;padding-block:12px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
  .logo{display:block}
  .brand-title{display:none}
  .tag{font-size:21px;color:var(--ink)}
  .menu-btn{display:inline-flex}
  .side-nav{display:none;flex-basis:100%;padding-block:4px 8px}
  .side.open .side-nav{display:flex}
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
}

/* ================= practice shell ================= */
.app{height:100%;max-width:1440px;margin:0 auto;display:flex;flex-direction:column;gap:10px;padding-block:10px 12px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.bar{display:flex;align-items:center;gap:12px;min-height:44px}
.brand{display:flex;align-items:center;gap:8px;min-width:0;font-family:var(--f-display);font-size:22px;line-height:1;white-space:nowrap}
.brand span{overflow:hidden;text-overflow:ellipsis}
.brand svg{width:26px;height:26px;color:var(--go)}
.quit{margin-left:auto;display:inline-flex;align-items:center;justify-content:center;gap:6px;height:44px;padding:0 16px 0 12px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink-2);font-size:14px;font-weight:500;font-family:inherit;cursor:pointer}
.quit svg{width:20px;height:20px;flex:none}
.quit:not([hidden]) + .teacher{margin-left:0}
.quit,.teacher{flex:none}
.quit-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px 16px}
.quit-yes{margin-top:0;font-family:inherit;cursor:pointer}
.teacher{margin-left:auto;display:inline-flex;align-items:center;gap:8px;height:44px;padding:0 16px 0 9px;border-radius:999px;border:1px solid var(--line);background:var(--card);color:var(--ink-2);font-size:14px;font-weight:500;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.hold{position:relative;width:28px;height:28px;flex:none}
.hold svg{position:absolute;inset:0;width:28px;height:28px}
.hold .gl{inset:6px;width:16px;height:16px;color:var(--ink-2)}
.hold .track{fill:none;stroke:var(--line);stroke-width:2.5}
.hold .fill{fill:none;stroke:var(--go);stroke-width:2.5;stroke-linecap:round;stroke-dasharray:69.12;stroke-dashoffset:69.12;transform:rotate(-90deg);transform-origin:14px 14px;transition:stroke-dashoffset .12s}
.teacher.holding .hold .fill{stroke-dashoffset:0;transition:stroke-dashoffset .7s linear}

.cue{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px;background:var(--card);border:3px solid transparent;border-radius:24px;padding:10px 12px 10px 10px;box-shadow:0 1px 0 rgba(28,41,50,.05),0 10px 26px -18px rgba(28,41,50,.5);transition:background .25s,border-color .25s}
.cue.watch{background:var(--card-quiet)}
.cue.nudge{border-color:var(--cue)}
.cue-icon{position:relative;width:86px;height:86px;border-radius:18px;background:var(--wall);display:grid;place-items:center;color:var(--ink)}
.cue-icon svg{width:70px;height:70px}
.cue.nudge .cue-icon{animation:breathe 1.3s ease-in-out infinite}
@keyframes breathe{50%{transform:scale(1.06)}}
.cue-text{min-width:0;display:flex;flex-direction:column;gap:4px}
.cue-top{display:flex;align-items:center;gap:10px;min-height:26px;min-width:0}
.turn{font-size:13px;font-weight:600;letter-spacing:.02em;padding:2px 10px;border-radius:999px;background:var(--cue-soft);color:var(--cue-ink)}
.cue.watch .turn{background:var(--teacher);color:var(--ink-2)}
.count{font-size:13px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.say{margin:0;display:flex;align-items:center;font-family:var(--f-display);font-weight:400;font-size:clamp(28px,4.3vw,48px);line-height:1.16;color:var(--ink);text-wrap:balance;word-break:keep-all}
.sub{display:block;flex:0 1 auto;min-width:0;max-width:100%;font-size:15px;line-height:20px;font-weight:600;color:var(--cue-ink);background:var(--cue-soft);border-radius:999px;padding:2px 10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.replay{width:74px;height:74px;border-radius:50%;border:0;background:var(--go);color:#fff;display:grid;place-items:center;box-shadow:0 8px 18px -10px var(--go-deep)}
.replay svg{width:38px;height:38px}
.replay:active{transform:scale(.95)}

.strip{list-style:none;margin:0;padding:8px 6px 4px;display:flex;gap:9px;overflow-x:auto;scrollbar-width:none;flex:none}
.strip::-webkit-scrollbar{display:none}
.chip{position:relative;flex:0 0 auto;width:48px;height:48px;border-radius:14px;background:var(--card);border:2px solid var(--line);display:grid;place-items:center;color:var(--ink-2);transition:transform .2s,background .2s,border-color .2s}
.chip:first-child{margin-left:auto}
.chip:last-child{margin-right:auto}
.chip svg{width:32px;height:32px}
.chip .n{position:absolute;top:-8px;left:-7px;min-width:19px;height:19px;padding:0 5px;border-radius:10px;background:var(--ink);color:#fff;font-size:11px;font-weight:600;line-height:19px;text-align:center;font-variant-numeric:tabular-nums}
.chip .ok{display:none;position:absolute;right:-7px;bottom:-7px;width:21px;height:21px;padding:3px;border-radius:50%;background:var(--good);color:#fff}
.chip.helper{border-style:dashed;background:transparent}
.chip.helper > svg:not(.ok){opacity:.5}
.chip.now{border-color:var(--cue);background:var(--cue-soft);transform:translateY(-3px)}
.chip.done .ok{display:block}
.chip.helper.done .ok{background:var(--ink-3)}

.stage{position:relative;flex:1 1 auto;min-height:0;border-radius:24px;overflow:hidden;background:var(--wall)}
#scene{position:absolute;inset:0;width:100%;height:100%;touch-action:none;-webkit-user-select:none;user-select:none}
.s-wall{fill:var(--wall)}
.s-floor{fill:var(--floor)}
.s-base{fill:var(--floor-edge)}
.s-shadow{fill:rgba(28,41,50,.12)}
.hit{fill:transparent}
[data-hit]{cursor:pointer;outline:none}
[data-hit]:focus-visible .hit{stroke:var(--go);stroke-width:4;stroke-dasharray:10 8}
.w-label{font-family:var(--f-ui);font-size:15px;font-weight:600;fill:#4F5F69;text-anchor:middle}
.w-tag{font-family:var(--f-ui);font-size:12px;font-weight:600;fill:#8F9DA6}
.w-brand{font-family:var(--f-display);font-size:30px;fill:#A39E96}
.ph{font-family:var(--f-ui);font-size:12px;font-weight:600;fill:#22313C;text-anchor:middle}
.display.on .ph{fill:#4D6170}
.display.on .ph.lit{fill:#7FE6D6}
.seg{fill:#1C2933}
.display.on .seg{fill:#22343F}
.display.on .seg.lit{fill:#7FE6D6}
/* the glow and the effects never take a touch: a tap beside a glowing thing reaches what is under it */
#fx{pointer-events:none}
.ring{fill:none;stroke:var(--cue)}
.ring.halo{stroke-width:22;stroke-opacity:.2}
.ring.core{stroke-width:6}
#glow.on .ring.core{animation:pulse 1.3s ease-in-out infinite}
@keyframes pulse{50%{stroke-opacity:.35;stroke-width:11}}
.ripple{fill:none;stroke-width:5}
.ripple.miss{stroke:#7A8992}
.ripple.hand{stroke:var(--cue)}
#scene.no-stickers .sticker{display:none}

.veil{position:absolute;inset:0;z-index:5;display:grid;place-items:center;padding:16px;background:var(--veil);overflow-y:auto}
.veil-card{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;max-width:520px}
.veil h1,.veil h2{margin:0;font-family:var(--f-display);font-weight:400;font-size:clamp(34px,5.2vw,56px);line-height:1.08;text-wrap:balance}
.go-btn{display:inline-flex;align-items:center;gap:12px;font-family:var(--f-display);font-size:clamp(28px,4vw,40px);line-height:1;padding:18px 44px 18px 34px;border-radius:999px;border:0;background:var(--go);color:#fff;box-shadow:0 14px 28px -14px var(--go-deep)}
.go-btn svg{width:34px;height:34px}
.go-btn:active{transform:scale(.97)}
.veil-meta{margin:0;font-size:14px;color:var(--ink-2);text-wrap:balance}
.home-link{display:inline-flex;align-items:center;gap:8px;margin-top:4px;padding:9px 16px;border-radius:999px;border:1.5px solid var(--line);background:var(--card);color:var(--ink-2);font-size:15px;font-weight:600;text-decoration:none}
.home-link svg{width:18px;height:18px;color:var(--go)}
.done-mark{width:104px;height:104px;border-radius:50%;background:var(--good);color:#fff;display:grid;place-items:center;box-shadow:0 0 0 12px var(--good-soft)}
.done-mark svg{width:62px;height:62px}
/* the moment a practice ends: a big check over the finished scene for two seconds, before the results */
.done-pop{position:absolute;inset:0;z-index:4;display:grid;place-items:center;pointer-events:none;background:radial-gradient(closest-side,rgba(255,255,255,.85),rgba(255,255,255,.55) 45%,rgba(255,255,255,0))}
.done-pop-in{display:flex;flex-direction:column;align-items:center;gap:16px}
.done-pop .done-mark{width:clamp(112px,20vmin,170px);height:clamp(112px,20vmin,170px);box-shadow:0 0 0 14px var(--good-soft),0 18px 40px -18px rgba(28,41,50,.55)}
.done-pop .done-mark svg{width:60%;height:60%}
.done-pop-t{margin:0;font-family:var(--f-display);font-size:clamp(34px,5.2vw,56px);line-height:1.08;color:var(--ink);text-shadow:0 0 12px #fff,0 0 4px #fff}

.veil.done{place-items:start center}
.done-wrap{width:min(1000px,100%);display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:24px;align-items:start;padding-block:10px}
.done-side{display:flex;flex-direction:column;align-items:center;gap:14px;text-align:center;padding-top:clamp(8px,4vh,40px)}
.result{background:var(--card);border-radius:22px;padding:14px 18px 16px;box-shadow:0 1px 0 rgba(28,41,50,.05),0 12px 28px -20px rgba(28,41,50,.55);-webkit-user-select:text;user-select:text}
.result-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:2px 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.result-title{margin:0;font-size:16px;font-weight:600}
.result-meta{margin:0;font-size:13px;color:var(--ink-2)}
.res-list{list-style:none;margin:0;padding:0}
.res-row{display:grid;grid-template-columns:22px 30px minmax(0,1fr) auto;align-items:center;gap:10px;padding:6px 0;border-top:1px solid #E7EDEF}
.res-row:first-child{border-top:0}
.res-n{font-size:12px;font-weight:600;color:var(--ink-3);text-align:right;font-variant-numeric:tabular-nums}
.res-ico{width:30px;height:30px;color:var(--ink)}
.res-t{min-width:0;font-size:15px;line-height:1.35;word-break:keep-all}
.res-t small{display:block;font-size:12px;color:var(--ink-3)}
.code{display:inline-block;min-width:54px;text-align:center;padding:3px 8px;border-radius:8px;font-size:12.5px;font-weight:600;white-space:nowrap}
.code.lv0{background:var(--good);color:#fff}
.code.lv1{background:var(--help-1);color:var(--ink)}
.code.lv2{background:var(--help-2);color:var(--ink)}
.code.lv3{background:var(--help-3);color:#fff}
.code.lvx{background:var(--teacher);color:var(--ink-3)}
.result-sum{margin:10px 0 0;padding-top:8px;border-top:1px solid var(--line);font-size:15px;font-weight:600;font-variant-numeric:tabular-nums}
.result-note{margin:4px 0 0;font-size:12.5px;color:var(--ink-3)}

/* ================= teacher sheet ================= */
.backdrop{position:fixed;inset:0;z-index:40;background:var(--shade)}
.sheet{position:fixed;top:0;right:0;bottom:0;z-index:41;width:min(560px,100%);display:flex;flex-direction:column;background:var(--card);box-shadow:-24px 0 48px -28px rgba(28,41,50,.6);padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);padding-right:env(safe-area-inset-right,0px);-webkit-user-select:text;user-select:text}
.sheet-head{display:flex;align-items:center;gap:12px;padding:14px 14px 12px 20px;border-bottom:1px solid var(--line)}
.sheet-head h2{margin:0;font-family:var(--f-display);font-weight:400;font-size:24px;line-height:1}
.icon-btn{margin-left:auto;width:44px;height:44px;border-radius:12px;border:0;background:transparent;display:grid;place-items:center;color:var(--ink-2)}
.icon-btn svg{width:24px;height:24px}
.sheet-body{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:4px 20px 32px}
.group{display:flex;flex-direction:column;gap:10px;padding:18px 0;border-bottom:1px solid var(--line)}
.group:last-child{border-bottom:0}
.group h3{margin:0;font-size:16px;font-weight:600;color:var(--ink)}
.lbl{margin:0;font-size:13px;font-weight:600;color:var(--ink-2)}
.hint{margin:0;font-size:13.5px;line-height:1.6;color:var(--ink-2);max-width:62ch}
.row{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
select,input[type="text"]{font:inherit;font-size:15px;color:var(--ink);background:var(--card);border:1.5px solid var(--line);border-radius:10px;padding:8px 10px;min-height:42px}
select{flex:1 1 180px;min-width:0}
input[type="text"]{flex:1 1 200px;min-width:0}
.btn{min-height:42px;padding:0 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-size:14px;font-weight:500;color:var(--ink)}
.btn.primary{background:var(--go);border-color:var(--go);color:#fff}
.seg-row{display:flex;flex-wrap:wrap;gap:6px}
.seg-row button{min-height:42px;padding:0 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-size:14px;font-weight:500;color:var(--ink-2);font-variant-numeric:tabular-nums}
.seg-row button[aria-pressed="true"]{background:var(--go);border-color:var(--go);color:#fff}
.switch{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:46px;padding:0 2px;border:0;background:transparent;text-align:left;font-size:15px}
.switch i{position:relative;flex:none;width:48px;height:28px;border-radius:14px;background:var(--line);transition:background .2s}
.switch i::after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(28,41,50,.3);transition:transform .2s}
.switch[aria-checked="true"] i{background:var(--go)}
.switch[aria-checked="true"] i::after{transform:translateX(20px)}
.stepper{display:inline-flex;align-items:center;gap:6px}
.stepper button{width:42px;height:42px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-size:20px;line-height:1;color:var(--ink)}
.stepper output{min-width:56px;text-align:center;font-size:16px;font-weight:600;font-variant-numeric:tabular-nums}
.ladder{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;font-weight:600}
.ladder li{padding:4px 10px;border-radius:8px}
.ladder .arrow{padding:0;color:var(--ink-3);font-weight:400}
.editor{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.grp{border:1.5px solid var(--line);border-radius:14px;padding:10px 12px;display:flex;flex-direction:column;gap:8px;background:var(--card)}
.grp-head{display:flex;align-items:center;gap:8px}
.gnum{flex:none;width:26px;height:26px;border-radius:8px;background:var(--ink);color:#fff;font-size:13px;font-weight:600;display:grid;place-items:center;font-variant-numeric:tabular-nums}
.gico{flex:none;width:30px;height:30px;color:var(--ink)}
.grp-head input{flex:1 1 auto;min-height:40px;padding:6px 10px;font-weight:500}
.acts{list-style:none;margin:0;padding:0 0 0 34px;display:flex;flex-direction:column;gap:2px;font-size:13px;color:var(--ink-2)}
.acts .act::before{content:"·";margin-right:6px;color:var(--ink-3)}
.acts .cut button,.joint button{border:0;background:transparent;color:var(--go);font-size:12.5px;font-weight:500;padding:2px 0;min-height:28px}
.joint{list-style:none;display:flex;justify-content:center;padding:2px 0}
.joint button{display:inline-flex;align-items:center;gap:4px;min-height:34px;padding:2px 10px;border-radius:8px}

.toast{position:fixed;left:50%;bottom:calc(20px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);z-index:60;max-width:calc(100% - 32px);padding:10px 16px;border-radius:12px;background:var(--ink);color:#fff;font-size:14px;box-shadow:0 10px 24px -12px rgba(0,0,0,.5);text-align:center}

@media (max-width:760px){
  .done-wrap{grid-template-columns:1fr;gap:16px}
  .done-side{padding-top:6px}
}
@media (max-width:700px){
  .cue{gap:10px;border-radius:20px;padding:8px 10px 8px 8px}
  .cue-icon{width:62px;height:62px;border-radius:14px}
  .cue-icon svg{width:50px;height:50px}
  .replay{width:58px;height:58px}
  .replay svg{width:30px;height:30px}
  .chip{width:40px;height:40px;border-radius:12px}
  .chip svg{width:26px;height:26px}
  .strip{gap:8px}
  .brand span{font-size:19px}
  .stage{border-radius:18px}
}
@media (max-width:560px){
  .bar{gap:10px}
  .brand svg{display:none}
  .brand span{font-size:18px}
  .quit{width:44px;padding:0}
  .quit span{display:none}
  .teacher{padding:0 12px 0 7px;gap:6px}
  .cue{grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"icon top replay" "say say say";column-gap:10px;row-gap:6px;padding:8px 10px 10px}
  .cue-text{display:contents}
  .cue-icon{grid-area:icon;width:54px;height:54px;border-radius:13px}
  .cue-icon svg{width:44px;height:44px}
  .cue-top{grid-area:top;flex-wrap:wrap;row-gap:4px;align-content:center}
  .say{grid-area:say}
  .replay{grid-area:replay;width:52px;height:52px}
  .replay svg{width:28px;height:28px}
}
@media (max-width:380px){
  .brand span{font-size:16px}
}
@media (max-height:620px){
  .app{gap:6px;padding-block:6px 8px}
  .cue-icon{width:58px;height:58px}
  .cue-icon svg{width:46px;height:46px}
  .replay{width:56px;height:56px}
  .say{font-size:clamp(24px,3.4vw,36px)}
  .strip{padding-top:6px}
}
@media (prefers-reduced-motion:no-preference){
  .done-pop:not([hidden]) .done-pop-in{animation:donePop .5s cubic-bezier(.2,1.5,.4,1) both}
  @keyframes donePop{from{transform:scale(.35);opacity:0}to{transform:scale(1);opacity:1}}
}
@media (prefers-reduced-motion:reduce){
  #glow.on .ring.core,.cue.nudge .cue-icon{animation:none}
  .chip,.cue,.card{transition:none}
}