/* Huolingo – minimalist, responsive, no framework. Light/dark via prefers-color-scheme. */
:root{--bg:#fbfbf9;--fg:#1c1c1a;--muted:#6b6b66;--line:#e4e3de;--card:#fff;--accent:#2f6fed;--accent-fg:#fff;--good:#2e9d5b;--warn:#d98a00;--bad:#d14343;
 --new:#dbe8ff;--seen:#fff1c2;--learning:#ffd9c2;--known:transparent;--radius:10px;--maxw:62rem}
@media (prefers-color-scheme:dark){:root{--bg:#161614;--fg:#e9e8e3;--muted:#9a9990;--line:#2c2c29;--card:#1f1f1c;--accent:#6b9bff;--accent-fg:#101010;
 --new:#22365e;--seen:#4a3f12;--learning:#5a3418}}
*{box-sizing:border-box}
html{font-size:100%;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:1rem/1.55 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP",sans-serif}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
main{max-width:var(--maxw);margin:0 auto;padding:1rem}
main.narrow{max-width:28rem}
header.top{border-bottom:1px solid var(--line);background:var(--card)}
header.top .in{max-width:var(--maxw);margin:0 auto;padding:.5rem 1rem;display:flex;gap:.25rem 1rem;align-items:center;flex-wrap:wrap}
header.top .brand{font-weight:700;color:var(--fg);margin-right:.5rem}
header.top nav{display:flex;gap:.25rem .9rem;flex-wrap:wrap;flex:1}
header.top nav a{color:var(--muted);padding:.2rem 0}header.top nav a.on{color:var(--fg);border-bottom:2px solid var(--accent)}
.badge{background:var(--accent);color:var(--accent-fg);border-radius:99px;padding:0 .45rem;font-size:.75rem;margin-left:.2rem}
footer{max-width:var(--maxw);margin:2rem auto 1rem;padding:0 1rem;color:var(--muted);font-size:.85rem}
h1{font-size:1.6rem;margin:.6rem 0}h2{font-size:1.2rem;margin:1.2rem 0 .5rem}h3{font-size:1rem;margin:.8rem 0 .3rem}
.muted{color:var(--muted)}.small{font-size:.85rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1rem;margin:.75rem 0}
.grid{display:grid;gap:.75rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.row{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center}.row.between{justify-content:space-between}
label{display:block;margin:.6rem 0 .2rem;font-weight:600;font-size:.9rem}
input[type=text],input[type=email],input[type=password],input[type=url],input[type=number],select,textarea{width:100%;padding:.55rem .65rem;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--fg);font:inherit}
textarea{min-height:8rem}
button,.btn{display:inline-block;padding:.5rem .9rem;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--fg);font:inherit;cursor:pointer}
button.primary,.btn.primary{background:var(--accent);color:var(--accent-fg);border-color:var(--accent)}
button.danger{color:var(--bad)}button.link{border:0;background:none;color:var(--accent);padding:0}
button:disabled{opacity:.5;cursor:default}
.notice{background:#e6f6ec;color:#17613a;border:1px solid #bfe3cd;padding:.5rem .8rem;border-radius:8px;margin:.5rem 0}
.error,.notice{white-space:pre-wrap;overflow-wrap:anywhere}   /* full multi-line provider errors, never truncated */
.error{background:#fdecec;color:#8e2323;border:1px solid #f1c0c0;padding:.5rem .8rem;border-radius:8px;margin:.5rem 0}
@media (prefers-color-scheme:dark){.notice{background:#16301f;color:#b5e4c6;border-color:#245238}.error{background:#3a1b1b;color:#f2b8b8;border-color:#5b2a2a}}
.bar{height:.6rem;background:var(--line);border-radius:99px;overflow:hidden}.bar>i{display:block;height:100%;background:var(--accent)}.bar.done>i{background:var(--good)}
table{border-collapse:collapse;width:100%}th,td{text-align:left;padding:.4rem .5rem;border-bottom:1px solid var(--line);vertical-align:top}
.pill{display:inline-block;border:1px solid var(--line);border-radius:99px;padding:0 .55rem;font-size:.8rem;color:var(--muted)}
.big{font-size:2rem;font-weight:700;line-height:1.1}
.heat{display:grid;grid-template-columns:repeat(7,1fr);gap:3px;max-width:20rem}.heat i{aspect-ratio:1;border-radius:3px;background:var(--line)}
.heat i.l1{background:#9ecbff}.heat i.l2{background:#5aa2ff}.heat i.l3{background:#2f6fed}.heat i.fz{background:#8ad7e8}
.achv{display:grid;grid-template-columns:repeat(auto-fill,minmax(10rem,1fr));gap:.5rem}.achv div{border:1px solid var(--line);border-radius:var(--radius);padding:.5rem;background:var(--card)}.achv div.off{opacity:.4;filter:grayscale(1)}
/* captcha */
.captcha{margin:.8rem 0;font-size:.85rem;color:var(--muted)}
/* ---------- reader ---------- */
#reader{font-size:var(--fs,1.25rem);line-height:2.4;max-width:46rem;margin:0 auto}
#reader p{margin:0 0 1rem}
figure.lesson-img{margin:.2rem 0 1rem;text-align:center}figure.lesson-img img{max-width:100%;max-height:22rem;border-radius:var(--radius)}
#reader h1.rtitle{font-size:1.25em;line-height:2.4;margin:.2rem 0 .6rem}
#reader .sent{padding:0 .1rem;border-radius:4px}
#reader .w{cursor:pointer;border-radius:3px}
#reader .w:hover{outline:1px solid var(--accent)}
.sa .st-new{background:var(--new)}.sa .st-seen{background:var(--seen)}.sa .st-learning{background:var(--learning)}.sa .st-known{background:var(--known)}
body[data-levelmarks] .sa .w[data-lv]::after{content:attr(data-lv);font-size:.5em;vertical-align:super;color:var(--muted);margin-left:1px;line-height:0}
body[data-hlmarks] .sa .st-new{border-bottom:2px dotted currentColor}body[data-hlmarks] .sa .st-seen{border-bottom:2px dashed currentColor}body[data-hlmarks] .sa .st-learning{border-bottom:2px solid currentColor}
#hl-preview span{padding:0 .25rem;border-radius:3px}
rt{font-size:.5em;line-height:1;color:var(--muted)}
body[data-script=native] .sa rt{display:none}
body[data-script=both]:not([data-allfuri]) .sa .kk rt{display:none}   /* kanji known -> no furigana, unless "show all hiragana" */
body[data-script=reading] .sa .rb{display:none}
body[data-script=reading] .sa rt{font-size:inherit;color:inherit;display:inline}
body[data-script=reading] .sa ruby{display:inline}
.tts-status-full{white-space:pre-wrap}
.ai-status{position:fixed;left:.6rem;bottom:.6rem;max-width:min(36rem,92vw);padding:.35rem .7rem;border-radius:.4rem;font-size:.8rem;background:var(--card,#fff);border:1px solid var(--line,#ccc);box-shadow:0 1px 6px rgba(0,0,0,.18);z-index:50}
.ai-status.warn{border-color:#d98c00}.ai-status.err{border-color:#c00;color:#c00}.ai-status.ok{border-color:#2a8a4a}
.media-sent{background:rgba(237,142,47,.18);box-shadow:inset 3px 0 0 #ed8e2f}
.hl-style-underline .tts-word{background:none!important;border-bottom:3px solid var(--tts-color,#2f6fed)}
.hl-style-box .tts-word{background:none!important;outline:2px solid var(--tts-color,#2f6fed);border-radius:3px}
.hl-style-bold .tts-word{background:none!important;font-weight:800;color:var(--tts-color,#2f6fed)}
.hl-style-background .tts-word{background:var(--tts-color,#2f6fed)!important;color:#fff}
.tts-sent{background:rgba(47,111,237,.12)}.tts-word{background:rgba(47,111,237,.45)!important;color:inherit}
.say,.sbtn{border:0;background:none;color:var(--muted);padding:0 .2rem;font-size:.7em;vertical-align:middle;cursor:pointer;opacity:.6}.say:hover,.sbtn:hover{opacity:1;color:var(--accent)}
#clicked-bar{position:sticky;top:0;z-index:5;background:var(--card);border-bottom:1px solid var(--line);padding:.4rem .5rem;display:flex;gap:.4rem;overflow-x:auto;white-space:nowrap;min-height:2.6rem;align-items:center}
.chip{display:inline-flex;gap:.3rem;align-items:center;border:1px solid var(--line);border-radius:99px;padding:.1rem .2rem .1rem .6rem;background:var(--bg);font-size:.95rem}
.chip.st-learning{background:var(--learning)}.chip.st-known{opacity:.6}.chip.st-seen{background:var(--seen)}
.chip button{border-radius:99px;padding:0 .5rem;font-size:.85rem}
.toolbar{display:flex;gap:.5rem;flex-wrap:wrap;align-items:center;margin:.5rem 0}
.toolbar select{width:auto}
#popup:empty{display:none}
#popup{position:fixed;z-index:20;left:0;right:0;bottom:0;max-height:70vh;overflow:auto;background:var(--card);border-top:2px solid var(--accent);padding:1rem;box-shadow:0 -6px 20px rgba(0,0,0,.18)}
@media (min-width:60rem){#popup{left:auto;right:1rem;bottom:1rem;width:26rem;max-height:80vh;border:1px solid var(--line);border-radius:var(--radius)}}
#popup .head{display:flex;justify-content:space-between;gap:1rem}
#popup .word{font-size:1.8rem;line-height:1.3}
#popup ol{margin:.3rem 0;padding-left:1.2rem}
#popup .pos{color:var(--muted);font-size:.8rem}
/* ---------- review ---------- */
.flash{text-align:center;padding:2rem 1rem;min-height:12rem}.flash .word{font-size:2.4rem;line-height:1.4}
.rate{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem;margin-top:1rem}.rate button{padding:.8rem .2rem}.rate small{display:block;color:var(--muted)}
.htmx-request{opacity:.6}
@media (max-width:40rem){main{padding:.6rem}#reader{line-height:2.2}}