/* learn.css — 学习增强层样式（learn.js / review.js / reference.js 共用）。
 * 依赖 archive.css 的 :root 变量；在 archive.css 之后加载。
 */

/* ---- 旧汉字 hover 气泡关闭（汉字改由词典标注） ---- */
.ko-cell .hanja:hover:after{content:none!important}

/* ---- 学习工具栏 ---- */
.learn-bar{position:sticky;top:12px;z-index:900;display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding:12px;margin:0 0 16px;max-width:100%;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:14px;font-size:13px;
  box-shadow:0 4px 18px #222e5010}
.learn-bar .lb-group{display:inline-flex;gap:6px;align-items:center;flex-wrap:wrap}
.learn-bar .lb-label{color:var(--muted);font-size:12px;font-weight:700}
.learn-bar button,.learn-bar select{font-size:12.5px;min-height:36px}
.learn-bar button{background:#fff;color:var(--ink);border:1px solid var(--line);padding:5px 10px;
  border-radius:10px;font-weight:700;cursor:pointer}
.learn-bar button:hover{border-color:var(--blue);color:var(--blue)}
.learn-bar button.on{background:var(--blue);border-color:var(--blue);color:#fff}
.learn-bar button.warn{background:#fff4e5;border-color:var(--gold);color:var(--gold)}
.learn-bar select{padding:4px 6px;border:1px solid var(--line);border-radius:10px;background:#fff;
  color:var(--ink);font-weight:600}
.learn-bar .seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.learn-bar .seg button{border:0;border-radius:0;padding:5px 9px;background:#fff;min-height:36px}
.learn-bar .seg button+button{border-left:1px solid var(--line)}
.learn-bar .seg button.on{background:var(--blue);color:#fff}
.learn-bar .lb-link{color:var(--blue);font-weight:700;text-decoration:none;padding:5px 8px;
  border:1px solid var(--line);border-radius:9px;background:#fff;white-space:nowrap}
.learn-bar .lb-link:hover{text-decoration:underline}
.learn-bar .lb-badge{margin-left:auto;color:var(--muted);font-size:12px;white-space:nowrap}
.learn-bar .lb-novoice{color:var(--gold);font-size:12px}
.learn-bar input[type=checkbox]{accent-color:var(--blue)}

/* ---- 单词与行朗读 ---- */
.ko-cell{position:relative}
.ko-cell .word{cursor:pointer}
.ko-cell .word:hover{background:#d7f0e3}
.ko-cell .word.lex{border-bottom:1px solid var(--green)}
.ko-cell .word.lex:hover{background:#ccefe0}
.ko-cell rt{font-size:.6em;color:var(--purple);font-weight:600}
.row-tts{position:absolute;top:5px;right:5px;z-index:6;background:#ffffffd9;border:1px solid var(--line);
  color:var(--green);padding:2px 7px;border-radius:8px;font-size:12px;font-weight:700;cursor:pointer;
  opacity:.35;min-height:0}
.ko-cell:hover .row-tts,.row-tts:focus{opacity:1}
.ko-cell.tts-active{outline:2px solid var(--green);background:#e4f8ec!important}
.ko-cell.tts-active .word{background:transparent}

/* ---- 遮盖自测 ---- */
.mask-ko .ko-cell .word,.mask-ko .ko-cell .roman{filter:blur(6px);user-select:none}
.mask-ko .ko-cell.revealed .word,.mask-ko .ko-cell.revealed .roman{filter:none;user-select:auto}
.mask-ja .ja-cell .word{filter:blur(6px);user-select:none}
.mask-ja .ja-cell.revealed .word{filter:none;user-select:auto}
.mask-ko .ko-cell,.mask-ja .ja-cell{cursor:pointer}
.mask-ko .ko-cell.revealed,.mask-ja .ja-cell.revealed{outline:1px dashed var(--line)}

/* ---- 词条弹窗 ---- */
.learn-pop{position:absolute;z-index:10000;width:272px;max-width:calc(100vw - 24px);
  overflow-wrap:anywhere;background:#fff;border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow);padding:14px;font-size:13px;line-height:1.55}
.learn-pop .lp-word{font-size:22px;font-weight:800;letter-spacing:-.01em;margin-bottom:6px}
.learn-pop .lp-key{color:var(--muted);font-size:12px;margin:-4px 0 6px}
.learn-pop .lp-sense{display:grid;grid-template-columns:minmax(0,auto) 1fr;gap:2px 10px;
  padding:5px 0;border-top:1px dashed var(--line)}
.learn-pop .lp-sense .h{font-weight:800;font-size:15px}
.learn-pop .lp-sense .j{color:var(--purple)}
.learn-pop .lp-sense .z{color:var(--muted)}
.learn-pop .lp-page{color:var(--muted);font-size:12px;background:#f7f8fb;border-radius:8px;
  padding:6px 8px;margin:4px 0}
.learn-pop .lp-actions{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.learn-pop button{background:#fff;border:1px solid var(--line);color:var(--ink);padding:5px 9px;
  border-radius:8px;font-size:12px;font-weight:700;cursor:pointer}
.learn-pop button:hover{border-color:var(--blue);color:var(--blue)}
.learn-pop button.primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.learn-pop button.saved{background:#eefaf5;border-color:var(--green);color:var(--green)}

/* ---- 听写 / 填空 面板 ---- */
.learn-panel{position:fixed;top:0;left:0;right:0;z-index:9500;max-height:100dvh;overflow-y:auto;
  background:#fffffff0;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
  box-shadow:var(--shadow);padding:14px 20px}
.learn-panel .lp-inner{max-width:920px;margin:auto}
.learn-panel h3{margin:0 0 8px;font-size:16px}
.learn-panel .lp-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:8px}
.learn-panel button{background:#fff;border:1px solid var(--line);color:var(--ink);padding:6px 12px;
  border-radius:9px;font-size:13px;font-weight:700;cursor:pointer}
.learn-panel button:hover{border-color:var(--blue);color:var(--blue)}
.learn-panel button.primary{background:var(--ink);color:#fff;border-color:var(--ink)}
.learn-panel input[type=text]{padding:8px 12px;border:1px solid var(--line);border-radius:9px;
  font-size:16px;min-width:0;width:min(100%,420px);font-family:inherit}
.learn-panel .lp-ja{color:var(--purple);font-size:14px;margin:4px 0}
.learn-panel .lp-ko{font-size:18px;margin:4px 0;line-height:1.9}
.learn-panel .lp-msg{font-size:14px;font-weight:700;margin-top:6px}
.learn-panel .lp-msg.ok{color:var(--green)}
.learn-panel .lp-msg.bad{color:#b3261e}
.learn-panel .lp-progress{color:var(--muted);font-size:12px}
.quiz-blank{display:inline-block;min-width:2.6em;padding:1px 8px;border-radius:6px;
  background:var(--soft);color:transparent;border-bottom:2px solid var(--blue);user-select:none}
.quiz-opt{background:#fff;border:1px solid var(--line);border-radius:9px;padding:8px 14px;
  font-size:15px;font-weight:700;cursor:pointer}
.quiz-opt:hover{border-color:var(--blue)}
.quiz-opt.right{background:#eefaf5;border-color:var(--green);color:var(--green)}
.quiz-opt.wrong{background:#fff0f0;border-color:#d65a5a;color:#b3261e}
.diff-bad{background:#ffd7d7;color:#b3261e;border-radius:3px;padding:0 1px}
.diff-ok{color:var(--green)}
.dict-hide .word,.dict-hide .roman{visibility:hidden}
.dict-hide .row-tts{display:none}

/* ---- 文章模板扩展小节（grammar / vocab） ---- */
.card-grammar,.card-vocab{margin-top:10px;font-size:13px}
.card-grammar strong,.card-vocab strong{display:block;color:var(--muted);font-size:11px;
  letter-spacing:.08em;margin-bottom:4px}
.card-grammar .g-item{display:inline-block;margin:0 6px 4px 0;padding:2px 8px;border-radius:7px;
  background:#f4f0ff;color:var(--purple);text-decoration:none}
.card-grammar a.g-item:hover{text-decoration:underline}
.card-vocab .v-item{display:flex;gap:6px 12px;align-items:baseline;flex-wrap:wrap;padding:3px 0;
  border-top:1px dashed var(--line)}
.card-vocab .v-ko{font-weight:800}
.card-vocab .v-h{color:var(--ink)}
.card-vocab .v-j{color:var(--purple)}
.card-vocab .v-z{color:var(--muted)}
.card-vocab .v-act{margin-left:auto;display:flex;gap:5px}
.card-vocab button{background:#fff;border:1px solid var(--line);color:var(--ink);padding:2px 7px;
  border-radius:7px;font-size:12px;font-weight:700;cursor:pointer;min-height:36px}
.card-vocab button:hover{border-color:var(--blue);color:var(--blue)}
.card-vocab button.saved{background:#eefaf5;border-color:var(--green);color:var(--green)}

/* ---- review.html ---- */
.rev-stats{display:flex;gap:10px;flex-wrap:wrap;margin:10px 0 16px}
.rev-chip{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 16px;
  min-width:110px}
.rev-chip b{display:block;font-size:22px}
.rev-chip span{color:var(--muted);font-size:12px}
.rev-stage{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;
  box-shadow:var(--shadow);text-align:center;margin-bottom:18px}
.rev-front{font-size:clamp(34px,6vw,56px);font-weight:800;line-height:1.2;margin:12px 0;
  overflow-wrap:anywhere}
.rev-sub{color:var(--muted);font-size:13px;margin-bottom:14px}
.rev-back{text-align:left;border-top:1px dashed var(--line);padding-top:14px;margin-top:8px}
.rev-back .rb-sense{display:grid;grid-template-columns:minmax(0,auto) 1fr 1fr;gap:2px 12px;
  padding:5px 0;font-size:15px}
.rev-back .rb-sense .h{font-weight:800}
.rev-back .rb-sense .j{color:var(--purple)}
.rev-back .rb-sense .z{color:var(--muted)}
.rev-ctx{font-size:13px;color:#3e485a;background:#f7f8fb;border-radius:9px;padding:9px 11px;
  margin:8px 0}
.rev-ctx .ko{font-weight:700}
.rev-src{font-size:12px;color:var(--muted)}
.rev-src a{color:var(--blue)}
.rev-grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:16px}
.rev-grades button{padding:12px 6px;font-size:14px;border-radius:11px;border:1px solid var(--line);
  background:#fff;color:var(--ink)}
.rev-grades button small{display:block;font-size:11px;font-weight:500;opacity:.75;margin-top:2px}
.rev-grades .g-again:hover{border-color:#d65a5a;color:#b3261e}
.rev-grades .g-hard:hover{border-color:var(--gold);color:var(--gold)}
.rev-grades .g-good:hover{border-color:var(--green);color:var(--green)}
.rev-grades .g-easy:hover{border-color:var(--blue);color:var(--blue)}
.rev-grades .g-again{border-color:#f0c8c8}
.rev-grades .g-hard{border-color:#ecd9b0}
.rev-grades .g-good{border-color:#bfe6d3}
.rev-grades .g-easy{border-color:#c3d0f5}
.rev-answer input[type=text]{padding:10px 14px;font-size:20px;border:1px solid var(--line);
  border-radius:10px;min-width:0;max-width:100%;font-family:inherit}
.rev-table-wrap{overflow-x:auto}
.rev-table{width:100%;border-collapse:collapse;font-size:13px}
.rev-table th{text-align:left;color:var(--muted);font-size:11px;letter-spacing:.06em;
  padding:6px 8px;border-bottom:1px solid var(--line);white-space:nowrap}
.rev-table td{padding:7px 8px;border-bottom:1px solid #f0f2f7;vertical-align:top}
.rev-table .del{background:#fff;border:1px solid var(--line);color:#b3261e;padding:2px 8px;
  border-radius:7px;font-size:12px;cursor:pointer;min-height:0}
.rev-toolbar{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:10px 0}
.rev-toolbar input[type=text]{padding:7px 10px;border:1px solid var(--line);border-radius:9px;
  font-size:13px;min-width:200px;font-family:inherit}
.rev-toolbar button,.rev-toolbar label.btn{background:#fff;border:1px solid var(--line);
  color:var(--ink);padding:6px 12px;border-radius:9px;font-size:12.5px;font-weight:700;
  cursor:pointer}
.rev-toolbar button:hover,.rev-toolbar label.btn:hover{border-color:var(--blue);color:var(--blue)}
.rev-done{padding:30px;text-align:center}
.rev-done .big{font-size:26px;font-weight:800;margin-bottom:8px}

/* ---- reference/ 速查页 ---- */
.ref-layout{display:grid;grid-template-columns:minmax(0,200px) minmax(0,1fr);gap:22px;align-items:start}
.ref-nav{position:sticky;top:70px;display:flex;flex-direction:column;gap:4px}
.ref-nav a{color:var(--muted);text-decoration:none;font-size:13px;padding:6px 10px;
  border-radius:8px;border-left:2px solid transparent}
.ref-nav a:hover{color:var(--blue);background:var(--soft)}
.ref-group{margin-bottom:30px}
.ref-group>h2{margin:0 0 4px}
.ref-group .g-desc{color:var(--muted);font-size:13px;margin:0 0 14px}
.ref-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;
  margin-bottom:14px;scroll-margin-top:80px;overflow-x:auto;overflow-wrap:anywhere}
.ref-item h3{margin:0 0 6px;font-size:17px}
.ref-item h3 .ko-title{color:var(--green)}
.ref-item h3 .swap{color:var(--muted);font-weight:400;margin:0 6px}
.ref-note{font-size:14px;margin:6px 0;color:#3e485a}
.ref-note:lang(ja),p.ref-ja{font-size:12.5px;color:var(--muted);margin:4px 0}
.ref-caution{background:#fff4e5;border-left:3px solid var(--gold);border-radius:8px;
  padding:8px 11px;font-size:13px;margin-top:8px;color:#6b4a1b}
.ref-level{display:inline-block;font-size:11px;font-weight:800;border-radius:999px;
  padding:2px 9px;margin-left:8px;vertical-align:middle}
.ref-level.l1{background:#eefaf5;color:var(--green)}
.ref-level.l2{background:var(--soft);color:var(--blue)}
.ref-level.l3{background:#f4f0ff;color:var(--purple)}
.ref-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}
.ref-table th{text-align:left;font-size:11px;color:var(--muted);letter-spacing:.06em;
  padding:5px 8px;border-bottom:1px solid var(--line)}
.ref-table td{padding:6px 8px;border-bottom:1px solid #f0f2f7}
.ref-table .hz{font-weight:800}
.say-btn{background:#fff;border:1px solid var(--line);color:var(--green);padding:1px 7px;
  border-radius:7px;font-size:12px;cursor:pointer;font-weight:700;white-space:nowrap;min-height:0}
.say-btn:hover{border-color:var(--green)}
.add-btn{background:#fff;border:1px solid var(--line);color:var(--blue);padding:1px 7px;
  border-radius:7px;font-size:12px;cursor:pointer;font-weight:700;white-space:nowrap;min-height:0}
.add-btn:hover{border-color:var(--blue)}
.add-btn.saved{background:#eefaf5;border-color:var(--green);color:var(--green)}
.ref-search{width:100%;max-width:420px;padding:9px 13px;border:1px solid var(--line);
  border-radius:10px;font-size:14px;margin-bottom:16px;font-family:inherit}
.ref-lookup{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;
  margin-bottom:20px;position:sticky;top:0;z-index:800;box-shadow:0 4px 18px #222e5010}
.ref-lookup input{width:100%;max-width:420px;padding:9px 13px;border:1px solid var(--line);
  border-radius:10px;font-size:15px;font-family:inherit}
.ref-hits{margin-top:10px;font-size:14px}
.ref-hit{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;padding:6px 0;
  border-top:1px dashed var(--line)}
.ref-hit .k{font-weight:800;font-size:16px}
.ref-hit .s{color:var(--muted);font-size:13px}
.ref-pair{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.ref-ex-line{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap;padding:5px 0;
  border-top:1px dashed var(--line);font-size:14px}
.ref-ex-line .ja{color:var(--purple)}
.ref-ex-line .ko{font-weight:700}
.ref-arrow{color:var(--muted)}
@media(max-width:780px){.ref-layout{grid-template-columns:1fr}.ref-nav{position:static;
  flex-direction:row;flex-wrap:wrap}.learn-bar{position:static}}
@media(max-width:540px){
  .rev-grades{grid-template-columns:repeat(2,minmax(0,1fr))}
  .rev-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .rev-chip{min-width:0}
  .ref-nav{flex-wrap:nowrap;overflow-x:auto}
  .ref-nav a{flex:none}
  .ref-lookup{position:static}
  .ref-search,.ref-lookup input,.rev-toolbar input[type=text]{font-size:16px;min-width:0;max-width:100%}
}

/* ---- index.html 学习面板 / 徽章 ---- */
.study-panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px 20px;
  margin-bottom:20px}
.study-panel h2{margin:0 0 4px;font-size:18px}
.study-panel .sp-sub{color:var(--muted);font-size:13px;margin:0 0 14px}
.sp-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.sp-card{display:block;border:1px solid var(--line);border-radius:14px;padding:14px;
  text-decoration:none;color:var(--ink);background:var(--paper)}
.sp-card:hover{border-color:var(--blue);box-shadow:var(--shadow)}
.sp-card .t{font-weight:800;font-size:15px;margin-bottom:4px}
.sp-card .d{color:var(--muted);font-size:12px;line-height:1.5}
.sp-card .n{color:var(--blue);font-size:12px;font-weight:800;margin-top:6px}
.sp-today{display:flex;gap:16px;flex-wrap:wrap;margin-top:14px;padding-top:12px;
  border-top:1px dashed var(--line);font-size:13px;color:var(--muted)}
.sp-today b{color:var(--ink)}
.idx-search{width:100%;max-width:460px;padding:9px 14px;border:1px solid var(--line);
  border-radius:11px;font-size:14px;margin-bottom:14px;font-family:inherit;background:#fff}
.card{position:relative}
.idx-badge{position:absolute;top:12px;right:14px;display:flex;gap:5px;font-size:11px;
  color:var(--muted);z-index:2}
.idx-badge span{background:var(--soft);border-radius:999px;padding:2px 8px;font-weight:700}
.idx-badge .b-ok{background:#eefaf5;color:var(--green)}
.idx-badge .b-score{background:#fff4e5;color:var(--gold)}
@media(max-width:780px){.sp-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}

.study-coach{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;
  margin:16px 0}
.study-coach h2{margin:0;font-size:18px}
.coach-heading{display:flex;justify-content:space-between;align-items:baseline;gap:12px;
  flex-wrap:wrap}
.study-coach>p{color:var(--muted);font-size:13px;margin:8px 0}
.study-coach label{display:block;font-size:13px;font-weight:700;margin:12px 0 6px}
.study-coach select,.study-coach textarea{width:100%;min-width:0;font-size:16px;
  border:1px solid var(--line);border-radius:8px;padding:10px;font-family:inherit;
  background:#fff;color:var(--ink)}
.study-steps{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.study-steps button{min-height:44px;background:#fff;border:1px solid var(--line);
  color:var(--ink);padding:8px 14px;border-radius:10px;font-weight:700;cursor:pointer}
.study-steps button.on{background:var(--blue);border-color:var(--blue);color:#fff}
#study-instruction{color:var(--muted);font-size:13px;margin:10px 0}
.study-note-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:8px}
.study-note-actions button{min-height:44px;background:var(--ink);color:#fff;border:0;
  border-radius:10px;padding:8px 16px;font-weight:700;cursor:pointer}
#study-note-status{color:var(--muted);font-size:13px}
.coach-footnote{color:var(--muted);font-size:12px;margin:14px 0 0}
.study-focus .grid>article.card:not(.study-target){display:none}
.study-focus .wrap>.intro,.study-focus .article-toc{display:none}
.study-recall .grid{display:none}

.hangul-start{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;
  margin-bottom:24px;scroll-margin-top:20px;overflow-x:auto}
.hangul-start h2{margin:0 0 10px}
.hangul-start h3{margin:18px 0 8px;font-size:16px}
.hangul-start p{font-size:15px;line-height:1.85;margin:8px 0}
.hangul-start details{margin:12px 0}
.hangul-start summary{min-height:44px;cursor:pointer;font-weight:700;padding-block:10px}
.hangul-start .say-btn{min-height:36px;padding:4px 12px}

.guide .ref-item p{font-size:15px;line-height:1.85}
.guide .ref-item li{line-height:1.85;margin-bottom:6px}
.guide .ref-group ol,.guide .ref-group ul{padding-left:22px}

@media(max-width:540px){.study-coach{padding:16px}}

/* ---- 打印 ---- */
@media print{
  .learn-bar,.learn-pop,.learn-panel,.row-tts,.rev-grades,.rev-toolbar,.idx-search,
  .ref-nav,.say-btn,.add-btn,.study-coach{display:none!important}
  .mask-ko .ko-cell .word,.mask-ko .ko-cell .roman,.mask-ja .ja-cell .word{filter:none}
}