/* Zhilone's Forge — coal & iron, ember orange, dark gold; a coiled dragon totem behind everything.
   A single dark world on purpose. */
:root {
  --coal: #121014;
  --iron: #1C191E;
  --steel: #29252B;
  --edge: #3A343B;
  --ash: #A99F97;
  --bone: #EDE5DA;
  --ember: #E4712A;
  --ember-hot: #FFB257;
  --gold: #C9A45C;
  --forgot: #C8503C;
  --fuzzy: #C9A45C;
  --knew: #6FAE7A;
  --display: "Marcellus SC", "Trajan Pro", Georgia, serif;
  --serif: "Noto Serif TC", "Songti TC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: radial-gradient(ellipse at 50% 115%, #3A1A0C 0%, transparent 55%), var(--coal); color: var(--bone);
       font-family: var(--sans); font-size: 17px; line-height: 1.65; min-height: 100vh; }
#dragon { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.app { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; padding: 20px 16px 56px; }
[hidden] { display: none !important; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* masthead */
.masthead { position: relative; text-align: center; padding: min(calc((100vw - 32px) * .9), 540px) 0 26px; }
.mast-text { position: relative; z-index: 1; }
.kicker { margin: 0; font-family: var(--serif); font-weight: 900; letter-spacing: .5em; color: var(--ember); font-size: 14px; padding-left: .5em; }
.kanji { margin: 0; font-family: "Yuji Boku", "BiauKai", "DFKai-SB", "Kaiti TC", serif; font-size: clamp(50px, 15vw, 88px); line-height: 1.05;
         letter-spacing: .1em; padding-left: .1em; color: var(--ember-hot);
         text-shadow: 0 0 18px rgba(228,113,42,.55), 0 3px 0 #2A0F05, 0 0 42px rgba(228,113,42,.25); }
.kanji span { display: inline-block; vertical-align: baseline; }
.kanji .k-dragon { font-size: 1.55em; line-height: .9; margin-right: .02em; }
.kanji .k-of { font-size: .55em; margin: 0 .04em; }
.title { margin: 6px 0 0; font-family: "Almendra", var(--display); font-weight: 700; font-size: clamp(36px, 10.5vw, 58px); line-height: 1.05; letter-spacing: .02em;
         color: var(--gold); text-shadow: 0 0 22px rgba(228,113,42,.35), 0 2px 0 #000; text-wrap: balance; }
.motto { margin: 14px 0 0; color: var(--ash); font-family: var(--serif); font-weight: 600; }

/* stats */
.forge-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 10px 0 14px; }
.stat { background: rgba(28,25,30,.82); border: 1px solid var(--edge); border-radius: 10px; padding: 10px 6px 8px; text-align: center; backdrop-filter: blur(2px); }
.stat b { display: block; font-family: var(--mono); font-size: 26px; line-height: 1.1; font-weight: 600; color: var(--bone); }
.stat span { font-size: 12.5px; color: var(--ash); }
.stat.hot b { color: var(--ember-hot); text-shadow: 0 0 12px rgba(255,178,87,.45); }
.stat.flame b { color: var(--gold); }

/* buttons */
.btn { font: inherit; font-weight: 700; color: var(--bone); background: var(--steel); border: 1px solid var(--edge); border-radius: 10px;
       padding: 11px 16px; cursor: pointer; width: 100%; }
.btn:hover:not(:disabled) { border-color: var(--gold); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn:focus-visible, summary:focus-visible { outline: 2px solid var(--ember-hot); outline-offset: 2px; }
.btn.ember { background: linear-gradient(#EE8236, #B9531C); border-color: #FFB257; color: #1A0E06; text-shadow: 0 1px 0 rgba(255,220,170,.4); }
.btn.ember:hover:not(:disabled) { filter: brightness(1.08); }
.btn.big { font-size: 19px; padding: 14px 16px; letter-spacing: .08em; box-shadow: 0 0 24px rgba(228,113,42,.35); }
.btn.ghost { background: rgba(28,25,30,.6); }
.btn.small { width: auto; padding: 6px 12px; font-size: 14px; }

/* answer mode */
.mode-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; border: 0; padding: 0; margin: 10px 0 0; }
.mode-row legend { font-size: 13px; color: var(--ash); margin-bottom: 6px; padding: 0; }
.mode-row label { cursor: pointer; }
.mode-row input { position: absolute; opacity: 0; pointer-events: none; }
.mode-row span { display: grid; gap: 0; text-align: center; padding: 8px 6px; border-radius: 10px; border: 1px solid var(--edge); background: rgba(28,25,30,.8); font-weight: 700; }
.mode-row small { font-weight: 400; font-size: 12px; color: var(--ash); }
.mode-row input:checked + span { border-color: var(--ember-hot); color: var(--ember-hot); box-shadow: inset 0 0 0 1px var(--ember-hot), 0 0 14px rgba(228,113,42,.25); }
.mode-row input:focus-visible + span { outline: 2px solid var(--ember-hot); outline-offset: 2px; }

/* quiz */
.combo { font-family: var(--mono); font-size: 13px; color: var(--ember-hot); font-weight: 600; text-shadow: 0 0 10px rgba(255,178,87,.5); }
.quiz-options { display: grid; gap: 8px; }
.quiz-options.grid { grid-template-columns: 1fr 1fr; }
.opt { font: inherit; text-align: left; display: grid; grid-template-columns: 26px 1fr; gap: 8px; align-items: center; color: var(--bone);
  background: var(--steel); border: 1px solid var(--edge); border-radius: 10px; padding: 11px 12px; cursor: pointer; }
.quiz-options.grid .opt { font-size: 20px; }
.opt:hover:not(:disabled) { border-color: var(--gold); }
.opt:focus-visible { outline: 2px solid var(--ember-hot); outline-offset: 2px; }
.opt:disabled { cursor: default; }
.opt .key { font-family: var(--mono); font-size: 12px; color: var(--ash); border: 1px solid var(--edge); border-radius: 6px; text-align: center; line-height: 22px; }
.opt.right { border-color: var(--knew); background: rgba(111,174,122,.16); }
.opt.right .key { color: var(--knew); border-color: var(--knew); }
.opt.wrong { border-color: var(--forgot); background: rgba(200,80,60,.16); }
.opt.wrong .key { color: var(--forgot); border-color: var(--forgot); }
.verdict { margin: 0 0 10px; font-weight: 700; font-size: 17px; }
.verdict.ok { color: var(--knew); }
.verdict.miss { color: var(--forgot); }
.btn.next { margin-top: 16px; }
.acc { margin: 6px 0 0; color: var(--gold); font-size: 16px; }

/* decks */
.rule { display: flex; align-items: center; gap: 12px; margin: 30px 0 12px; font-family: var(--serif); font-weight: 900; font-size: 18px; letter-spacing: .3em; color: var(--gold); }
.rule::before, .rule::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--edge), transparent); }
.decks { display: grid; gap: 10px; }
.deck { display: grid; grid-template-columns: 1fr auto; gap: 4px 14px; align-items: center; background: rgba(28,25,30,.85); border: 1px solid var(--edge);
        border-left: 3px solid var(--ember); border-radius: 10px; padding: 14px 14px 12px; }
.deck h3 { margin: 0; font-family: var(--serif); font-size: 18px; }
.deck .domain { display: inline-block; font-size: 12px; color: var(--ember-hot); border: 1px solid rgba(228,113,42,.5); border-radius: 999px; padding: 0 8px; margin-right: 6px; }
.deck p { margin: 2px 0 0; font-size: 13.5px; color: var(--ash); grid-column: 1; }
.deck .meter { grid-column: 1; height: 5px; background: var(--steel); border-radius: 999px; overflow: hidden; margin-top: 6px; }
.deck .meter i { display: block; height: 100%; background: linear-gradient(90deg, var(--ember), var(--gold)); }
.deck .go { grid-column: 2; grid-row: 1 / span 3; width: auto; padding: 8px 14px; font-size: 15px; }

.forges { display: grid; gap: 18px; }
.forge-group h3.domain-head { margin: 0 0 8px; display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 17px; color: var(--bone); }
.domain-head .seal { width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; font-family: var(--serif); font-weight: 900; font-size: 15px;
  color: #1A0E06; background: linear-gradient(#EE8236, #B9531C); box-shadow: 0 0 12px rgba(228,113,42,.35); }
.domain-head small { font-family: var(--sans); font-size: 13px; color: var(--ash); font-weight: 400; }
.empty { margin: 0; padding: 12px 14px; border: 1px dashed var(--edge); border-radius: 10px; color: var(--ash); font-size: 14px; background: rgba(28,25,30,.6); }
.notes { display: grid; gap: 10px; }
.note-item { display: grid; gap: 2px; text-align: left; font: inherit; color: var(--bone); cursor: pointer; background: rgba(28,25,30,.85);
  border: 1px solid var(--edge); border-left: 3px solid var(--gold); border-radius: 10px; padding: 12px 14px; }
.note-item:hover { border-color: var(--gold); }
.note-item:focus-visible { outline: 2px solid var(--ember-hot); outline-offset: 2px; }
.note-item b { font-family: var(--serif); font-size: 17px; }
.note-item span { font-size: 13.5px; color: var(--ash); }
.note-item .domain { color: var(--gold); border-color: rgba(201,164,92,.5); }
.note-sheet { margin-top: 12px; background: rgba(28,25,30,.92); border: 1px solid var(--edge); border-radius: 14px; padding: 22px 20px; }
.note-sheet h2 { margin: 6px 0 4px; font-family: var(--serif); font-weight: 900; font-size: 24px; text-wrap: balance; }
.note-sheet .src { margin: 0 0 14px; font-size: 13px; color: var(--ash); }
.note-sheet .summary { margin: 0 0 16px; padding: 10px 14px; border-left: 3px solid var(--ember); background: rgba(228,113,42,.08); border-radius: 0 8px 8px 0; }
.note-sheet h3 { margin: 18px 0 6px; font-family: var(--serif); font-size: 17px; color: var(--gold); }
.note-sheet ul { margin: 0; padding-left: 20px; display: grid; gap: 4px; }
.note-sheet li { line-height: 1.7; }
.reading-row { display: flex; align-items: center; gap: 10px; margin: 0 0 6px; }
.reading { font-family: var(--mono); color: var(--ember-hot); font-size: 16px; }
.speak { font: inherit; font-size: 13px; color: var(--gold); background: transparent; border: 1px solid rgba(201,164,92,.5); border-radius: 999px; padding: 2px 10px; cursor: pointer; }
.speak:focus-visible { outline: 2px solid var(--ember-hot); outline-offset: 2px; }
.example { margin-top: 12px; padding: 10px 12px; background: rgba(0,0,0,.25); border-radius: 8px; }
.example p { margin: 0; }
.example p:first-child { font-size: 17px; }
.example p + p { font-size: 14px; color: var(--ash); margin-top: 2px; }
.howto { margin-top: 22px; background: rgba(28,25,30,.8); border: 1px solid var(--edge); border-radius: 10px; padding: 12px 16px; }
.howto summary { cursor: pointer; font-weight: 700; color: var(--gold); }
.howto ol { margin: 10px 0 6px; padding-left: 22px; }
.howto p { margin: 6px 0 2px; font-size: 15px; color: var(--ash); }
.foot { text-align: center; color: #6F6760; font-size: 13px; margin-top: 26px; }

/* anvil (review) */
.topbar { display: flex; align-items: center; gap: 10px; }
.deck-name { flex: 1; text-align: center; color: var(--ash); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#anvil-count { color: var(--gold); font-size: 14px; }
.heat { height: 4px; background: var(--steel); border-radius: 999px; overflow: hidden; margin: 12px 0 18px; }
.heat i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, #7A2A10, var(--ember), var(--ember-hot)); transition: width .3s; }
.anvil-card { background: rgba(28,25,30,.9); border: 1px solid var(--edge); border-radius: 14px; padding: 22px 20px 20px; box-shadow: 0 20px 50px rgba(0,0,0,.55); }
.card-meta { margin: 0 0 8px; font-size: 13px; color: var(--ember-hot); letter-spacing: .06em; }
.front { margin: 0 0 18px; font-family: var(--serif); font-weight: 900; font-size: clamp(22px, 6vw, 28px); line-height: 1.45; text-wrap: balance; }
.back { border-top: 1px dashed var(--edge); padding-top: 14px; }
#card-answer { margin: 0; font-size: 18px; }
.note { margin: 10px 0 0; font-size: 15px; color: var(--ash); }
.note:empty { display: none; }
.rate { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 18px; }
.rate-btn { display: grid; gap: 0; padding: 10px 6px; }
.rate-btn small { font-weight: 500; font-size: 12px; color: var(--ash); }
.rate-btn.forgot { border-color: rgba(200,80,60,.6); } .rate-btn.forgot b { color: var(--forgot); }
.rate-btn.fuzzy { border-color: rgba(201,164,92,.6); } .rate-btn.fuzzy b { color: var(--fuzzy); }
.rate-btn.knew { border-color: rgba(111,174,122,.6); } .rate-btn.knew b { color: var(--knew); }
.anvil-card.struck { animation: strike .35s ease-out; }
@keyframes strike { 0% { box-shadow: 0 0 0 0 rgba(255,178,87,.7), 0 20px 50px rgba(0,0,0,.55); } 100% { box-shadow: 0 0 0 18px rgba(255,178,87,0), 0 20px 50px rgba(0,0,0,.55); } }

/* done */
.done { text-align: center; background: rgba(28,25,30,.9); border: 1px solid var(--edge); border-radius: 14px; padding: 26px 20px; margin-top: 40px; }
.done .big { font-size: 46px; margin: 8px 0 0; color: var(--ember-hot); }
.done-tally { display: flex; justify-content: center; gap: 14px; margin: 10px 0 18px; font-size: 14px; }
.done-tally .forgot { color: var(--forgot); } .done-tally .fuzzy { color: var(--fuzzy); } .done-tally .knew { color: var(--knew); }
.actions { display: grid; gap: 10px; }

@media (max-width: 460px) { .forge-stats { grid-template-columns: repeat(2, 1fr); } }
@media (prefers-reduced-motion: reduce) { .anvil-card.struck { animation: none; } .heat i { transition: none; } }