/* Vocabulary Dojo — fonts self-hosted (latin subsets from @fontsource) */
@font-face{font-family:"Shippori Mincho";font-style:normal;font-weight:600;font-display:swap;src:url(/fonts/shippori-mincho-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"Shippori Mincho";font-style:normal;font-weight:800;font-display:swap;src:url(/fonts/shippori-mincho-latin-800-normal.woff2) format("woff2")}
@font-face{font-family:"Zen Kaku Gothic New";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/zen-kaku-gothic-new-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Zen Kaku Gothic New";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/zen-kaku-gothic-new-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Zen Kaku Gothic New";font-style:normal;font-weight:700;font-display:swap;src:url(/fonts/zen-kaku-gothic-new-latin-700-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:400;font-display:swap;src:url(/fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-weight:500;font-display:swap;src:url(/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}
/* Layout: one calm column, a dictionary-entry card at the centre; belts encode each word's level. */
:root{
  --paper:#E7E9E3; --sheet:#F6F7F3; --sheet-2:#EEF0EA; --ink:#1A1F2B; --muted:#596170; --line:#C8CCC3;
  --accent:#27457A; --accent-ink:#FFFFFF; --accent-soft:#DCE3EF;
  --ok:#2E7849; --ok-soft:#DDEDE2; --bad:#A93A34; --bad-soft:#F3DEDB;
  --belt-white:#FBFBF8; --belt-green:#4E8A3B; --belt-brown:#7A5230; --belt-black:#15171C;
  --f-display:"Shippori Mincho","Hiragino Mincho ProN","Songti SC",Georgia,serif;
  --f-body:"Zen Kaku Gothic New","Hiragino Sans","Segoe UI",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;
  --r:10px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --paper:#0F131A; --sheet:#171C25; --sheet-2:#1D2330; --ink:#E5E8ED; --muted:#99A2B1; --line:#2C3442;
  --accent:#93AFE3; --accent-ink:#0D1422; --accent-soft:#22304A;
  --ok:#6CC08A; --ok-soft:#173226; --bad:#E5847C; --bad-soft:#3A1F1F;
  --belt-white:#E8EAE5; --belt-green:#6DAE58; --belt-brown:#A67748; --belt-black:#050608; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#0F131A; --sheet:#171C25; --sheet-2:#1D2330; --ink:#E5E8ED; --muted:#99A2B1; --line:#2C3442;
  --accent:#93AFE3; --accent-ink:#0D1422; --accent-soft:#22304A;
  --ok:#6CC08A; --ok-soft:#173226; --bad:#E5847C; --bad-soft:#3A1F1F;
  --belt-white:#E8EAE5; --belt-green:#6DAE58; --belt-brown:#A67748; --belt-black:#050608; color-scheme:dark}
*{box-sizing:border-box}
html,body{background:var(--paper);color:var(--ink)}
body{font-family:var(--f-body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
.wrap{max-width:720px;margin:0 auto;padding-block:16px 64px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
header.top{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:10px;margin-right:auto;min-width:0}
.brand h1{font-family:var(--f-display);font-weight:800;font-size:1.55rem;margin:0;letter-spacing:.01em}
.brand .kanji{font-family:var(--f-display);color:var(--accent);font-size:1.1rem}
.streak{font-family:var(--f-mono);font-size:.85rem;color:var(--muted);display:flex;gap:6px;align-items:center}
.streak b{color:var(--ink);font-weight:500}
.iconbtn{border:1px solid var(--line);background:var(--sheet);border-radius:999px;padding:6px 12px;cursor:pointer;font-size:.8rem;color:var(--muted)}
.iconbtn:hover{color:var(--ink)}
nav.tabs{display:flex;gap:4px;margin:14px 0 18px;border-bottom:1px solid var(--line);overflow-x:auto;scrollbar-width:none}
nav.tabs button{border:0;background:none;padding:10px 12px;cursor:pointer;color:var(--muted);font-weight:500;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}
nav.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.status{font-size:.8rem;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:-6px 0 14px}
.status .dot{width:7px;height:7px;border-radius:50%;background:var(--muted);display:inline-block}
.status .dot.live{background:var(--ok)} .status .dot.warn{background:var(--bad)}
.status button{border:0;background:none;color:var(--accent);cursor:pointer;padding:0;font-size:.8rem;text-decoration:underline}
.card{background:var(--sheet);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.stack{display:flex;flex-direction:column;gap:14px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.eyebrow{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:700}
.muted{color:var(--muted)}
.btn{border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);border-radius:8px;padding:11px 18px;font-weight:700;cursor:pointer;min-height:44px}
.btn.ghost{background:transparent;color:var(--accent)}
.btn:disabled{opacity:.45;cursor:default}
.kbd{font-family:var(--f-mono);font-size:.7rem;border:1px solid var(--line);border-radius:4px;padding:0 5px;color:var(--muted);margin-left:6px}
.btn .kbd{border-color:currentColor;color:inherit;opacity:.7}
/* plan */
.plan{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.plan .step{background:var(--sheet-2);border-radius:8px;padding:12px}
.plan .n{font-family:var(--f-display);font-size:1.9rem;font-weight:800;line-height:1}
.plan .l{font-size:.82rem;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:.8rem;border:1px solid var(--line);border-radius:999px;padding:2px 10px;background:var(--sheet)}
/* entry */
.entry .hw{font-family:var(--f-display);font-weight:800;font-size:clamp(2rem,7vw,2.8rem);line-height:1.1;margin:0;text-wrap:balance;overflow-wrap:anywhere}
.entry .pos{font-style:italic;color:var(--muted);font-family:var(--f-display)}
.pron{display:flex;flex-wrap:wrap;align-items:center;gap:6px 12px;margin-top:6px}
.pron .say{font-family:var(--f-mono);font-size:.95rem;letter-spacing:.02em}
.pron .say b{font-weight:500;color:var(--accent);text-transform:uppercase}
.pron .ipa{font-family:var(--f-display);color:var(--muted)}
.pron .pnote{flex-basis:100%;font-size:.82rem;color:var(--muted)}
.pron.compact{margin-top:0;font-size:.92rem}
.hear{border:1px solid var(--line);background:var(--sheet-2);border-radius:999px;padding:4px 12px;cursor:pointer;font-size:.82rem;color:var(--ink);min-height:32px}
.hear:hover{border-color:var(--accent)}
.entry dl{display:grid;grid-template-columns:8.5rem minmax(0,1fr);gap:10px 16px;margin:0}
.entry dt{font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:700;padding-top:3px}
.entry dd{margin:0;min-width:0}
.entry .def{font-size:1.1rem}
.entry mark{background:var(--accent-soft);color:inherit;border-radius:3px;padding:0 2px}
@media (max-width:520px){.entry dl{grid-template-columns:minmax(0,1fr);gap:2px}.entry dd{margin-bottom:10px}.plan{grid-template-columns:1fr 1fr 1fr}}
/* question */
.progress{display:flex;gap:4px}
.progress i{flex:1;height:4px;border-radius:2px;background:var(--line)}
.progress i.ok{background:var(--ok)} .progress i.bad{background:var(--bad)} .progress i.cur{background:var(--accent)}
.qhead{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap}
.clock{font-family:var(--f-mono);font-size:.85rem;color:var(--muted);font-variant-numeric:tabular-nums}
.prompt{font-size:1.2rem;line-height:1.45}
.prompt.hw{font-family:var(--f-display);font-weight:800;font-size:2.1rem}
.opts{display:grid;gap:8px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:12px 14px;cursor:pointer;min-height:48px;width:100%}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt .k{font-family:var(--f-mono);font-size:.75rem;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:0 6px;margin-top:3px;flex:none}
.opt span:last-child{min-width:0;overflow-wrap:anywhere}
.opt.right{border-color:var(--ok);background:var(--ok-soft)} .opt.wrong{border-color:var(--bad);background:var(--bad-soft)}
.opt:disabled{cursor:default}
.cloze{font-size:1.15rem;line-height:1.8}
.cloze .blank{display:inline-block;border-bottom:2px solid var(--accent);min-width:7ch;color:var(--accent);font-weight:700}
.typed{display:flex;gap:8px;flex-wrap:wrap}
.typed input{flex:1 1 220px;min-width:0;border:1px solid var(--line);background:var(--paper);border-radius:8px;padding:11px 12px;font-size:1.05rem}
.hint{font-family:var(--f-mono);font-size:.8rem;color:var(--muted)}
.fb{border-radius:8px;padding:14px;border:1px solid var(--line)}
.fb.ok{background:var(--ok-soft);border-color:var(--ok)} .fb.bad{background:var(--bad-soft);border-color:var(--bad)}
.fb strong{display:block;margin-bottom:4px}
/* belts */
.belt{display:inline-flex;align-items:center;gap:7px;font-size:.78rem;white-space:nowrap}
.belt i{width:26px;height:8px;border-radius:2px;display:inline-block;border:1px solid var(--line);position:relative;overflow:hidden}
.belt.new i{background:var(--belt-white)}
.belt.learning i{background:var(--belt-white)}
.belt.learning i b{position:absolute;inset:0 auto 0 0;background:var(--belt-green)}
.belt.mastered i{background:var(--belt-brown);border-color:var(--belt-brown)}
.belt.locked i{background:var(--belt-black);border-color:var(--line)}
/* browse */
details.group{border-top:1px solid var(--line)}
details.group summary{cursor:pointer;padding:12px 2px;display:flex;justify-content:space-between;gap:10px;list-style:none}
details.group summary::-webkit-details-marker{display:none}
details.group summary .t{font-weight:700;min-width:0}
details.group summary .c{font-family:var(--f-mono);font-size:.8rem;color:var(--muted);white-space:nowrap}
.words{display:grid;gap:2px;padding-bottom:12px}
.wordrow{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 12px;align-items:center;text-align:left;border:0;background:none;padding:8px 6px;border-radius:6px;cursor:pointer;width:100%}
.wordrow:hover{background:var(--sheet-2)}
.wordrow .w{font-family:var(--f-display);font-weight:600;font-size:1.05rem;min-width:0;overflow-wrap:anywhere}
.wordrow .m{grid-column:1/-1;font-size:.82rem;color:var(--muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.wordrow .meta{font-family:var(--f-mono);font-size:.72rem;color:var(--muted);text-align:right;min-width:0}
@media (max-width:520px){.wordrow{grid-template-columns:minmax(0,1fr)}.wordrow .meta{text-align:left}nav.tabs button{padding:10px 8px}}
.search{width:100%;border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:10px 12px}
.skips{font-size:.88rem}
.skips li{margin:2px 0}
.skips a{color:var(--accent)}
/* progress */
.tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.tile{background:var(--sheet);border:1px solid var(--line);border-radius:8px;padding:12px}
.tile .v{font-family:var(--f-display);font-size:1.9rem;font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums}
.tile .l{font-size:.8rem;color:var(--muted)}
.cal{display:grid;grid-template-rows:repeat(7,1fr);grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:3px}
.cal i{aspect-ratio:1;border-radius:2px;background:var(--sheet-2);border:1px solid var(--line);max-width:100%}
.cal i.l1{background:color-mix(in srgb,var(--accent) 30%,var(--sheet))}
.cal i.l2{background:color-mix(in srgb,var(--accent) 60%,var(--sheet))}
.cal i.l3{background:var(--accent);border-color:var(--accent)}
.cal i.today{outline:2px solid var(--ink);outline-offset:0}
.chartbox{overflow-x:auto}
svg text{fill:var(--muted);font-family:var(--f-mono);font-size:10px}
.sheet-back{position:fixed;inset:0;background:color-mix(in srgb,var(--ink) 40%,transparent);display:flex;align-items:flex-end;justify-content:center;z-index:10;padding:env(safe-area-inset-top,0px) 0 0}
.sheet-panel{background:var(--paper);width:100%;max-width:720px;max-height:88vh;overflow:auto;border-radius:14px 14px 0 0;padding-block:18px calc(24px + env(safe-area-inset-bottom,0px));padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
textarea{width:100%;min-height:110px;border:1px solid var(--line);background:var(--paper);border-radius:8px;padding:12px;resize:vertical}
select{border:1px solid var(--line);background:var(--sheet);border-radius:8px;padding:9px 10px;max-width:100%}
.big{font-family:var(--f-display);font-weight:800;font-size:3.2rem;line-height:1;font-variant-numeric:tabular-nums}
.loading{padding:40px 0;text-align:center;color:var(--muted)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media (prefers-reduced-motion:no-preference){.fadein{animation:fi .18s ease-out}@keyframes fi{from{opacity:.4;transform:translateY(3px)}to{opacity:1;transform:none}}}