@font-face{font-family:"Looped";src:url(fonts/looped-thai.woff2) format("woff2");unicode-range:U+0E00-0E7F,U+200C-200D,U+25CC;font-weight:100 900;font-display:swap}
@font-face{font-family:"Looped";src:url(fonts/looped-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0300-0304,U+030C,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;font-weight:100 900;font-display:swap}
:root{--bg:#f6f2e9;--ink:#1b2420;--mute:#5d6862;--card:#fffdf8;--line:#ddd5c4;--lac:#a8432f;--gold:#e8b84a;--indigo:#22305e;--green:#2f8f5b;
  --mid:#1f8a4c;--high:#c0392b;--low:#2a55c4;--mid-bg:#e3f4ea;--high-bg:#fbe5e1;--low-bg:#e2e9fb;--shadow:0 3px 0 rgba(27,36,32,.85)}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#11140f;--ink:#efe9da;--mute:#a7ad9f;--card:#1b2019;--line:#323a2f;--mid:#5cd08d;--high:#ff7a66;--low:#86a7ff;--mid-bg:#173322;--high-bg:#3a1c17;--low-bg:#1a2547;--shadow:0 3px 0 rgba(0,0,0,.9)}}
:root[data-theme=dark]{--bg:#11140f;--ink:#efe9da;--mute:#a7ad9f;--card:#1b2019;--line:#323a2f;--mid:#5cd08d;--high:#ff7a66;--low:#86a7ff;--mid-bg:#173322;--high-bg:#3a1c17;--low-bg:#1a2547;--shadow:0 3px 0 rgba(0,0,0,.9)}
[hidden]{display:none!important}
*{box-sizing:border-box;min-width:0;-webkit-tap-highlight-color:transparent}
html{overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.55 "Looped","Noto Sans Thai","Sarabun","Thonburi",system-ui,sans-serif;padding-bottom:84px}
button{font:inherit;color:inherit}
a{color:var(--low)}
.th{display:block}.en{display:block;color:var(--mute);font-size:.86em}
.wrap{max-width:860px;margin:0 auto;padding:0 16px}
.read{font-family:"Noto Sans","Helvetica Neue",system-ui,sans-serif;letter-spacing:.01em}

/* the stage: sky, the north, the village of letters */
.stage{position:relative;background:#8fbfd6;overflow:hidden}
.stage canvas{display:block;width:100%;height:min(62vh,520px);touch-action:manipulation;cursor:pointer}
.stage .title{position:absolute;left:0;right:0;top:0;padding:14px 16px 0;pointer-events:none;color:#fffaf0;text-shadow:0 2px 0 rgba(27,20,16,.55),0 0 18px rgba(27,20,16,.35)}
.stage h1{margin:0;font-size:clamp(30px,7vw,56px);line-height:1.05;font-weight:800}
.stage h1 small{display:block;font-size:.42em;font-weight:600;letter-spacing:.04em;opacity:.95}
.stage .crumb{pointer-events:auto;font-size:.8em;opacity:.9}.stage .crumb a{color:#fffaf0}
.count{position:absolute;right:12px;bottom:12px;background:rgba(27,20,16,.72);color:#ffe9a8;border-radius:999px;padding:6px 14px;font-weight:700;font-size:.95em}
.count .bar{display:block;height:5px;border-radius:3px;background:rgba(255,255,255,.2);margin-top:4px;overflow:hidden}
.count .bar i{display:block;height:100%;background:var(--gold)}

/* the bottom bar: icons, a word under each */
nav.tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:center;gap:2px;padding:6px 6px calc(6px + env(safe-area-inset-bottom));background:rgba(27,36,32,.94);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
nav.tabs button{flex:1;max-width:96px;background:none;border:0;color:#d9d3c2;padding:6px 2px;border-radius:14px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:12.5px;line-height:1.1;cursor:pointer}
nav.tabs button svg{width:26px;height:26px}
nav.tabs button[aria-current=page]{background:var(--gold);color:#1b1410}
nav.tabs button:focus-visible{outline:3px solid #fff}

main section{display:none;padding:18px 0 28px}
main section.on{display:block}
h2{font-size:1.5em;line-height:1.2;margin:.2em 0 .1em}
h2 .en{font-size:.6em}
.lede{color:var(--mute);margin:.2em 0 1em}

/* pills and buttons a thumb can hit */
.pill{display:inline-flex;align-items:center;gap:8px;border:2px solid var(--ink);background:var(--card);border-radius:999px;padding:9px 18px;font-weight:700;cursor:pointer;box-shadow:var(--shadow);transition:transform .12s}
.pill:active{transform:translateY(2px);box-shadow:none}
.pill.gold{background:var(--gold);color:#1b1410}
.pill.ink{background:var(--ink);color:var(--bg)}
.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.chip{display:inline-block;border-radius:999px;padding:2px 10px;font-size:.8em;font-weight:700}
.c-mid{color:var(--mid);background:var(--mid-bg)}.c-high{color:var(--high);background:var(--high-bg)}.c-low{color:var(--low);background:var(--low-bg)}

/* ก–ฮ: the wall of letters */
.wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.tile{position:relative;border:2px solid var(--ink);border-radius:16px;background:var(--card);box-shadow:var(--shadow);padding:0;cursor:pointer;overflow:hidden;aspect-ratio:3/4;display:flex;flex-direction:column;align-items:center;justify-content:flex-end}
.tile canvas{position:absolute;left:0;right:0;top:0;width:100%;height:64%}
.tile b{position:relative;font-size:34px;line-height:1;font-weight:700}
.tile small{position:relative;font-size:13px;color:var(--mute);margin-bottom:6px}
.tile.mid{border-color:var(--mid)}.tile.high{border-color:var(--high)}.tile.low{border-color:var(--low)}
.tile.mid b{color:var(--mid)}.tile.high b{color:var(--high)}.tile.low b{color:var(--low)}
.tile .got{position:absolute;top:6px;right:6px;width:12px;height:12px;border-radius:50%;background:var(--gold);box-shadow:0 0 0 2px var(--card)}
.tile.old{opacity:.78}
.legend{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 14px}

/* a letter, up close */
dialog{border:0;padding:0;background:transparent;max-width:min(560px,100vw);width:100%;max-height:100dvh}
dialog::backdrop{background:rgba(17,20,15,.72);backdrop-filter:blur(3px)}
.sheet{background:var(--card);color:var(--ink);border-radius:22px;overflow:hidden;margin:10px;border:2px solid var(--ink);box-shadow:0 8px 0 rgba(0,0,0,.6)}
.sheet .pic{position:relative;background:linear-gradient(#8fbfd6,#cfe3e8 70%,#f2e6c9)}
.sheet .pic canvas{display:block;width:100%;height:230px}
.sheet .big{position:absolute;left:14px;bottom:4px;font-size:110px;line-height:1;font-weight:700;color:#fffaf0;text-shadow:0 4px 0 rgba(27,20,16,.6)}
.sheet .body{padding:14px 18px 18px}
.sheet .name{font-size:1.6em;font-weight:800;line-height:1.2}
.sheet dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;margin:12px 0}
.sheet dt{color:var(--mute);font-size:.85em}.sheet dd{margin:0;font-weight:600}
.x{position:absolute;right:10px;top:10px;width:44px;height:44px;border-radius:50%;border:2px solid var(--ink);background:var(--card);font-size:22px;cursor:pointer;z-index:2}
.trace{position:relative;border:2px dashed var(--line);border-radius:16px;margin-top:12px;background:var(--bg);touch-action:none}
.trace canvas{display:block;width:100%;height:240px}
.trace .score{position:absolute;right:10px;top:8px;font-weight:800}

/* tone machine */
.machine{background:var(--indigo);color:#f4efe2;border-radius:22px;padding:16px;border:2px solid #0d1430;box-shadow:var(--shadow)}
.machine .out{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap}
.machine .syl{font-size:96px;line-height:1.05;font-weight:700}
.machine .rd{font-size:1.7em;font-weight:700;color:var(--gold)}
.machine .tn{font-size:1.1em}
.machine canvas{display:block;width:100%;height:150px;margin:8px 0}
.machine ol{margin:6px 0 0;padding-left:1.3em;color:#d6dcf5;font-size:.92em}
.knob{margin:14px 0 4px}
.knob h3{margin:0 0 6px;font-size:1em}
.knob .opts{display:flex;gap:6px;overflow-x:auto;padding:2px 2px 8px;scroll-snap-type:x proximity}
.knob .opts button{flex:0 0 auto;min-width:46px;height:48px;border-radius:12px;border:2px solid var(--line);background:var(--card);font-size:22px;font-weight:700;cursor:pointer;scroll-snap-align:start;padding:0 10px}
.knob .opts button.on{border-color:var(--ink);background:var(--gold);color:#1b1410}
.knob .opts button.mid{color:var(--mid)}.knob .opts button.high{color:var(--high)}.knob .opts button.low{color:var(--low)}
.knob .opts button.on.mid,.knob .opts button.on.high,.knob .opts button.on.low{color:#1b1410}
.err{color:#ffb4a8}

/* vowels */
.vstage{position:relative;background:var(--card);border:2px solid var(--ink);border-radius:22px;box-shadow:var(--shadow);height:220px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.vstage .w{font-size:120px;font-weight:700;line-height:1}
.vstage .w span{display:inline-block;transition:transform .5s cubic-bezier(.3,1.6,.5,1),opacity .4s}
.vstage .w .v{color:var(--lac)}
.vstage .w .c{color:var(--ink)}
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;margin-top:14px}
.vpair{border:2px solid var(--line);border-radius:14px;background:var(--card);display:grid;grid-template-columns:1fr 1fr;overflow:hidden}
.vpair button{border:0;background:none;padding:10px 4px;cursor:pointer;text-align:center}
.vpair button+button{border-left:2px dashed var(--line)}
.vpair button b{display:block;font-size:30px;line-height:1.2}
.vpair button small{color:var(--mute);font-size:.8em}
.vpair button.on{background:var(--gold);color:#1b1410}

/* words */
.decks{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.deck{position:relative;display:block;border:2px solid var(--ink);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);cursor:pointer;background:var(--card);padding:0;text-align:left;aspect-ratio:16/10}
.deck canvas{position:absolute;inset:0;width:100%;height:100%}
.deck .scrim{position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(17,20,15,.82))}
.deck .tx{position:absolute;left:12px;right:12px;bottom:10px;color:#fffaf0}
.deck .tx b{display:block;font-size:1.25em;line-height:1.2}
.deck .tx small{opacity:.85}
.deck .meter{position:absolute;top:10px;right:10px;background:rgba(17,20,15,.7);color:#ffe9a8;border-radius:999px;padding:2px 10px;font-size:.8em;font-weight:700}
.card{border:2px solid var(--ink);border-radius:22px;background:var(--card);box-shadow:var(--shadow);overflow:hidden}
.card .pic canvas{display:block;width:100%;height:180px}
.card .face{padding:18px;text-align:center}
.card .face .w{font-size:56px;font-weight:700;line-height:1.2}
.card .face .r{font-size:1.4em;color:var(--lac);font-weight:700;margin-top:4px}
.card .face .g{font-size:1.15em;margin-top:6px}
.card .face .src{color:var(--mute);font-size:.75em;margin-top:8px}
.card .hid{visibility:hidden}
.grades{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.grades .pill{justify-content:center}
.voice{font-size:.75em;color:var(--mute)}

/* quiz */
.quiz .q{font-size:1.1em;margin:4px 0 12px}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choices button{border:2px solid var(--ink);border-radius:16px;background:var(--card);box-shadow:var(--shadow);min-height:120px;cursor:pointer;position:relative;overflow:hidden;padding:0}
.choices button canvas{position:absolute;inset:0;width:100%;height:100%}
.choices button b{position:relative;font-size:52px;line-height:1}
.choices button.ok{border-color:var(--mid);background:var(--mid-bg)}
.choices button.no{border-color:var(--high);background:var(--high-bg);animation:shake .35s}
@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.streak{font-weight:800;color:var(--lac)}

/* signs */
.sign{border:4px solid #f4efe2;outline:3px solid var(--indigo);border-radius:10px;background:var(--indigo);color:#f4efe2;padding:22px 14px;text-align:center;margin:6px 4px 14px}
.sign .w{font-size:clamp(34px,9vw,60px);font-weight:700;line-height:1.25}
.sign .sub{margin-top:8px;color:#d6dcf5}
.parts{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:10px 0}
.parts span{border:2px solid var(--line);background:var(--card);border-radius:10px;padding:4px 10px;font-size:1.3em}

/* roots */
.net{position:relative;border:2px solid var(--ink);border-radius:22px;background:var(--card);box-shadow:var(--shadow);overflow:hidden}
.net canvas{display:block;width:100%;height:360px}
.rootlist{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.rootlist button{border:2px solid var(--line);background:var(--card);border-radius:999px;padding:6px 14px;cursor:pointer;font-size:1.05em}
.rootlist button.on{border-color:var(--ink);background:var(--gold);color:#1b1410}

/* booth */
.booth li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
.booth li b{font-size:1.4em;min-width:5.5em}
.booth li .st{margin-left:auto;font-size:.85em;color:var(--mute)}
.rec{width:56px;height:56px;border-radius:50%;border:3px solid var(--ink);background:#e04a3a;cursor:pointer;flex:0 0 auto}
.rec.on{animation:pulse 1s infinite}
@keyframes pulse{50%{transform:scale(.88)}}

footer{color:var(--mute);font-size:.8em;padding:20px 0 30px}
footer a{color:inherit}
.gets{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin:14px 0}
.get{display:flex;gap:12px;align-items:center;border:2px solid var(--ink);border-radius:18px;padding:12px 14px;background:var(--card);box-shadow:var(--shadow);text-decoration:none;color:inherit}
.get b{display:block}
.get svg{width:40px;height:40px;flex:0 0 auto}

@media (prefers-reduced-motion:no-preference){
  .tile{transition:transform .18s cubic-bezier(.3,1.6,.5,1)}
  .tile:hover{transform:translateY(-3px) rotate(-1deg)}
  .pill:hover{transform:translateY(-2px)}
}
@media (max-width:480px){
  body{font-size:17px}
  .wall{grid-template-columns:repeat(auto-fill,minmax(78px,1fr));gap:8px}
  .tile b{font-size:28px}
  .machine .syl{font-size:72px}
  nav.tabs button{font-size:11px}
}
select.pill{appearance:none;-webkit-appearance:none;color:var(--ink);background:var(--card);padding-right:18px}
.rootlist{flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px;scroll-snap-type:x proximity}
.rootlist button{flex:0 0 auto;max-width:78vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;scroll-snap-align:start}
.vpair button.on small{color:#1b1410}