:root{--bg:#f4f5f7;--card:#fff;--fg:#1d2330;--muted:#6b7280;--line:#e3e6eb;--accent:#2563eb;--accent-fg:#fff;--ok:#16a34a;--bad:#dc2626;--warn:#d97706}
@media (prefers-color-scheme:dark){:root{--bg:#0f1218;--card:#181c24;--fg:#e8ebf1;--muted:#9aa3b2;--line:#2a303b;--accent:#3b82f6}}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:640px;margin:0 auto;padding:16px}
[hidden]{display:none!important}
a{color:var(--accent)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}
.brand{font-size:18px;font-weight:700;text-decoration:none;color:inherit}
.muted{color:var(--muted)}
.hint{color:var(--muted);font-size:13px;margin:6px 0 0}
section,.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:12px}
h1{font-size:20px;margin:0}
h2{font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;margin:0 0 10px}
h3{font-size:13px;font-weight:600;margin:12px 0 6px}
label.f{display:block;font-size:13px;color:var(--muted);margin:8px 0 4px}
input,select,textarea{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:9px;width:100%}
textarea{resize:vertical;min-height:60px}
button{font:inherit;color:inherit;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:8px 10px;cursor:pointer;touch-action:manipulation}
button:active{transform:scale(.98)}
button.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
button.danger{color:var(--bad)}
button.sel{background:var(--accent);border-color:var(--accent);color:var(--accent-fg)}
button.link{border:0;background:none;color:var(--accent);padding:4px}
.row2{display:grid;grid-template-columns:2fr 1fr;gap:8px}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.actions button{flex:1}
.big{display:flex;gap:8px}
.big button{flex:1;padding:12px;font-size:16px}
.err{color:var(--bad);font-size:13px;min-height:1em;margin:6px 0 0}

/* auth */
.auth{max-width:380px;margin:8vh auto 0}
.tabs{display:flex;gap:6px;margin-bottom:12px}
.tabs button{flex:1}

/* children */
.kids{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.kid{display:flex;flex-direction:column;gap:6px;text-align:left;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:12px;cursor:pointer}
.kid .top{display:flex;align-items:center;gap:10px}
.kid .ava{font-size:34px;line-height:1}
.kid .name{font-weight:700;font-size:16px}
.kid.add{align-items:center;justify-content:center;color:var(--muted);border-style:dashed;min-height:120px}
.dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--line);margin-right:4px;vertical-align:middle}
.dot.on{background:var(--ok)}
.childhead{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.childhead .ava{font-size:42px;line-height:1}
.nav{display:flex;gap:6px;margin-bottom:12px;overflow-x:auto}
.nav button{flex:1;white-space:nowrap}
.avatars{display:grid;grid-template-columns:repeat(8,1fr);gap:6px}
.avatars button{font-size:22px;padding:6px 0}

/* lesson */
.topics .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.topic{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:13px;padding:8px 4px}
.topic b{font-size:24px;font-weight:400}
.modes{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.modes button{text-align:left;font-size:13px}
.modes button small{display:block;opacity:.75}
.words{display:flex;flex-direction:column;gap:6px}
.word{display:grid;grid-template-columns:1fr 1fr auto auto;gap:6px;align-items:center}
.word input{padding:6px 8px}
.stars{font-size:12px;color:var(--warn);min-width:40px;text-align:right;white-space:nowrap}
.x{padding:4px 9px;color:var(--muted)}
.progress{height:8px;border-radius:99px;background:var(--line);overflow:hidden;margin:8px 0}
.progress div{height:100%;background:var(--ok);width:0;transition:width .3s}
.current{border:1px dashed var(--line);border-radius:10px;padding:10px;text-align:center;margin:8px 0}
.current .vi{font-size:20px;font-weight:600}
.results{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;max-height:300px;overflow:auto}
.results li{display:flex;justify-content:space-between;gap:8px;padding:6px 8px;border-radius:8px;background:var(--bg);font-size:14px}
.ok{color:var(--ok)} .no{color:var(--bad)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.chips button{font-size:13px;padding:5px 9px;border-radius:99px}
.history{display:flex;flex-direction:column;gap:6px}
.history details{background:var(--bg);border-radius:8px;padding:8px 10px}
.history summary{cursor:pointer;display:flex;justify-content:space-between;gap:8px}
.badge{font-size:12px;padding:2px 8px;border-radius:99px;background:var(--line);color:var(--muted);white-space:nowrap}
.badge.on{background:color-mix(in srgb,var(--ok) 18%,transparent);color:var(--ok)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:14px}
.kv span:nth-child(odd){color:var(--muted)}
.toast{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:10px 14px;border-radius:10px;font-size:14px;max-width:calc(100% - 32px);opacity:0;transition:opacity .2s;pointer-events:none;z-index:9}
.toast.show{opacity:1}
dialog{border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--fg);width:min(420px,calc(100% - 32px));padding:16px}
dialog::backdrop{background:rgba(0,0,0,.45)}

/* eyes */
#preview{display:block;width:100%;aspect-ratio:2/1;image-rendering:pixelated;background:#05070a;border-radius:10px}
.emotions{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.emo{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:12px;padding:8px 2px}
.emo b{font-size:24px;font-weight:400;line-height:1.1}
#pad{position:relative;width:100%;aspect-ratio:2/1;border-radius:10px;background:var(--bg);border:1px solid var(--line);touch-action:none;cursor:crosshair;overflow:hidden}
#pad::before,#pad::after{content:"";position:absolute;background:var(--line)}
#pad::before{left:50%;top:0;bottom:0;width:1px}
#pad::after{top:50%;left:0;right:0;height:1px}
#dot{position:absolute;width:22px;height:22px;margin:-11px 0 0 -11px;border-radius:50%;background:var(--accent);left:50%;top:50%;z-index:1;transition:left .08s,top .08s}
.switchrow{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:6px 0}
.switchrow+.switchrow{border-top:1px solid var(--line)}
.switch{position:relative;width:44px;height:26px;flex:none}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;border-radius:99px;background:var(--line);transition:.15s}
.switch span::after{content:"";position:absolute;width:20px;height:20px;left:3px;top:3px;border-radius:50%;background:#fff;transition:.15s}
.switch input:checked+span{background:var(--accent)}
.switch input:checked+span::after{left:21px}

/* plan library, levels, search */
.wide{width:100%;text-align:left;padding:10px 12px}
.library{display:flex;flex-direction:column;gap:6px}
.tpl{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;background:var(--bg)}
.tpl .ic{font-size:24px;line-height:1}
.tpl .body{flex:1;min-width:0}
.tpl .body b{display:block}
.tpl .body small{display:block;color:var(--muted);font-size:12px}
.tpl button{flex:none;padding:6px 10px}
.levels{display:flex;gap:6px;margin-bottom:4px}
.levels button{flex:1;font-size:13px}
.topic{position:relative}
.topics .grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}
.topic .bar{display:block;width:80%;height:4px;border-radius:99px;background:var(--line);overflow:hidden;margin-top:3px}
.topic .bar i{display:block;height:100%;background:var(--ok)}
.topic.sel .bar{background:rgba(255,255,255,.35)}
.topic.sel .bar i{background:#fff}
.topic.sel small{color:inherit;opacity:.85}
.search{position:relative;margin:10px 0 8px}
.pop{position:absolute;left:0;right:0;top:calc(100% + 4px);z-index:5;background:var(--card);border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.15);max-height:300px;overflow:auto}
.pop button{display:flex;width:100%;gap:8px;align-items:center;border:0;border-radius:0;background:none;text-align:left;padding:8px 10px}
.pop button+button{border-top:1px solid var(--line)}
.pop button:hover{background:var(--bg)}
.pop small{margin-left:auto;color:var(--muted);font-size:12px;white-space:nowrap}
.word{grid-template-columns:auto 1fr 1fr auto auto auto}
.word .emo{font-size:20px;width:28px;text-align:center}

/* progress */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.tile{background:var(--bg);border-radius:10px;padding:8px;text-align:center}
.tile b{display:block;font-size:22px}
.tile span{font-size:12px;color:var(--muted)}
.topicbars{display:flex;flex-direction:column;gap:8px}
.tbar{display:grid;grid-template-columns:28px 1fr auto;gap:4px 8px;align-items:center;font-size:14px}
.tbar .ic{font-size:20px;grid-row:span 2}
.tbar .track{grid-column:2 / 4;height:8px;border-radius:99px;background:var(--line);overflow:hidden;display:flex}
.tbar .track i{display:block;height:100%}
.tbar .track .k{background:var(--ok)}
.tbar .track .l{background:var(--warn)}
#wordTopic{margin:4px 0 8px}
.wordlist{max-height:none}
.wordlist li{align-items:center}
.wordlist .meta{text-align:right;font-size:12px;color:var(--muted);white-space:nowrap}
@media (max-width:420px){.tiles{grid-template-columns:repeat(2,1fr)}}

/* music */
.player{display:flex;gap:12px;align-items:center;min-height:54px}
.player img{width:96px;height:54px;object-fit:cover;border-radius:8px;flex:none}
.player .body{min-width:0}
.player b{display:block;font-size:16px}
.transport{margin-top:10px}
.transport button{font-size:18px}
.tpl img{width:64px;height:36px;object-fit:cover;border-radius:6px;flex:none;background:var(--line)}
.tpl.now{outline:2px solid var(--accent)}
.tpl .err{margin:0;font-size:12px}