:root{
  --bg:#f6f5f2; --card:#fff; --ink:#17181a; --ink2:#5b5f66; --ink3:#9096a0;
  --line:#e5e3de; --line2:#f0eeea;
  --accent:#0f766e; --accent2:#0d635c; --accent-soft:#e7f3f1;
  --hot:#b45309; --hot-bg:#fff8ee; --hot-line:#f5d9b0;
  --star:#d97706; --ok:#16a34a;
  --sh:0 1px 2px rgba(20,20,20,.05), 0 6px 20px rgba(20,20,20,.05);
  --r:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB",sans-serif;
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit}

/* ---------------- header ---------------- */
header{
  position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:18px;
  padding:11px 22px;background:rgba(246,245,242,.86);backdrop-filter:saturate(1.6) blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:700;font-size:16px;letter-spacing:.2px;display:flex;align-items:center;gap:7px;white-space:nowrap}
.brand .logo{font-size:18px}
nav{display:flex;gap:4px;margin-left:6px}
nav button{
  border:0;background:transparent;color:var(--ink2);font-size:14px;font-weight:600;
  padding:7px 13px;border-radius:9px;cursor:pointer;transition:.15s;
}
nav button:hover{background:var(--line2);color:var(--ink)}
nav button.on{background:var(--ink);color:#fff}
.tools{margin-left:auto;display:flex;align-items:center;gap:12px}
.stats{display:flex;gap:14px;font-size:12.5px;color:var(--ink3);white-space:nowrap}
.stats b{color:var(--ink);font-weight:700;font-size:13.5px;margin-right:2px}

main{padding:24px 22px 90px;max-width:1500px;margin:0 auto}

/* ---------------- generic ---------------- */
.btn{
  border:1px solid var(--line);background:var(--card);color:var(--ink);
  padding:8px 14px;border-radius:10px;font-size:13.5px;font-weight:600;cursor:pointer;transition:.14s;
}
.btn:hover{border-color:#cfcbc3;background:#fdfcfa}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent2)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--ink2)}
.btn.ghost:hover{background:var(--line2);color:var(--ink)}
.btn.danger{color:#b91c1c;border-color:#f1c9c9}
.btn.danger:hover{background:#fef2f2}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:8px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.empty{text-align:center;color:var(--ink3);padding:70px 20px;font-size:14px}
.empty .big{font-size:40px;display:block;margin-bottom:12px;opacity:.5}
.sect-title{font-size:13px;font-weight:700;color:var(--ink3);letter-spacing:.6px;text-transform:uppercase;margin:0 0 12px}

/* ---------------- library ---------------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:15px}
.lcard{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:16px 17px;cursor:pointer;transition:.16s;position:relative;overflow:hidden;
}
.lcard:hover{transform:translateY(-2px);border-color:#d5d1c8;box-shadow:0 10px 26px rgba(20,20,20,.09)}
.lcard .t{font-weight:700;font-size:15.5px;line-height:1.4;margin-bottom:9px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lcard .meta{font-size:12.5px;color:var(--ink3);display:flex;gap:9px;flex-wrap:wrap;align-items:center}
.lcard .bar{height:4px;background:var(--line2);border-radius:3px;margin-top:13px;overflow:hidden}
.lcard .bar i{display:block;height:100%;background:var(--accent);border-radius:3px;transition:.4s}
.lcard .tags{display:flex;gap:6px;margin-top:10px;flex-wrap:wrap}
.tag{font-size:11.5px;font-weight:600;padding:2.5px 8px;border-radius:20px;background:var(--line2);color:var(--ink2)}
.tag.v{background:var(--accent-soft);color:var(--accent2)}
.tag.w{background:#fdf0e4;color:#9a5a12}
.tag.dd{background:#eef2fd;color:#3452b3}
.lcard .del{position:absolute;top:11px;right:11px;opacity:0;transition:.15s}
.lcard:hover .del{opacity:1}
.pulse{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--star);
  animation:pl 1.1s ease-in-out infinite;margin-right:5px}
@keyframes pl{0%,100%{opacity:1}50%{opacity:.25}}

/* ---------------- toolbar ---------------- */
.toolbar{
  position:sticky;top:57px;z-index:40;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:11px 14px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--sh);margin-bottom:16px;
}
.toolbar .sep{width:1px;height:24px;background:var(--line);margin:0 3px}
.seg{display:flex;background:var(--line2);border-radius:9px;padding:2px;gap:2px}
.seg button{border:0;background:transparent;padding:5px 11px;border-radius:7px;font-size:13px;
  font-weight:600;color:var(--ink2);cursor:pointer;transition:.13s;white-space:nowrap}
.seg button.on{background:var(--card);color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.09)}
select{border:1px solid var(--line);background:var(--card);border-radius:9px;padding:6.5px 9px;
  font-size:13px;font-family:inherit;color:var(--ink);cursor:pointer;max-width:230px}
label.fld{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--ink2);font-weight:600}
input[type=range]{accent-color:var(--accent);width:120px}

/* ---------------- practice ---------------- */
.practice-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:14px}
.practice-head h1{font-size:22px;margin:0 0 5px;line-height:1.3;font-weight:700;letter-spacing:-.2px}
.practice-head .sub{font-size:12.5px;color:var(--ink3);display:flex;gap:10px;flex-wrap:wrap}

.sents{display:flex;flex-direction:column;gap:8px;max-width:1000px}
.sent{
  display:flex;gap:13px;padding:13px 15px;background:var(--card);border:1px solid var(--line);
  border-radius:12px;transition:.15s;position:relative;scroll-margin-top:130px;align-items:flex-start;
}
.sent:hover{border-color:#d8d4cb}
.sent.cur{background:var(--hot-bg);border-color:var(--hot-line);box-shadow:0 0 0 3px #fdf3e6}
.sent.done{opacity:.62}
.sent.done .txt{text-decoration:line-through;text-decoration-color:#c9c5bd;text-decoration-thickness:1px}
.sent .num{width:26px;flex:0 0 26px;font-size:12px;font-weight:700;color:var(--ink3);
  text-align:right;padding-top:5px;font-variant-numeric:tabular-nums}
.sent.cur .num{color:var(--hot)}
.sent .body{flex:1;min-width:0}
.sent .txt{
  font-family:Georgia,"Iowan Old Style","Times New Roman",serif;
  font-size:17.5px;line-height:1.62;color:var(--ink);word-break:break-word;
}
.sent .txt .w{cursor:pointer;border-radius:3px;padding:0 1px;transition:.1s}
.sent .txt .w:hover{background:var(--accent-soft);color:var(--accent2)}
.sent .txt .w.saved{background:#fef3c7;box-shadow:inset 0 -2px 0 var(--star)}
.sent .txt .w.blank{background:#eceae5;color:transparent;border-radius:4px;box-shadow:none;
  border-bottom:1.5px solid #d5d1c8}
.sent .txt .w.blank:hover{background:#e2e6e4;color:transparent}
.sent .txt.bl{display:inline-block;color:transparent;user-select:none;min-width:110px;max-width:100%;
  white-space:nowrap;overflow:hidden;
  background:repeating-linear-gradient(90deg,#e7e4de 0 7px,#efece6 7px 14px);
  border-radius:6px;padding:2px 4px;box-shadow:inset 0 -1px 0 #ddd9d1}
.zh{font-size:13.5px;color:var(--accent2);margin-top:5px;line-height:1.5}
.aitag{display:inline-block;font-size:10.5px;font-weight:700;color:#3452b3;background:#eef2fd;
  border:1px solid #d8e0f8;border-radius:5px;padding:0 5px;margin-right:5px;vertical-align:1px;
  letter-spacing:.3px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif}
.glossrow{margin-top:6px}
.gloss{display:inline-block;font-size:12.5px;color:#9a5a12;background:#fdf6ec;
  border:1px solid #f2e0c4;border-radius:7px;padding:2px 9px;line-height:1.5}
.note{font-size:13px;color:var(--ink2);margin-top:5px;line-height:1.5;border-left:2px solid var(--line);
  padding-left:8px}
.sent .acts{display:flex;flex-direction:row;gap:5px;align-items:center;flex:0 0 auto;padding-top:1px}
.editor{margin-top:10px;background:#fbfaf7;border:1px solid var(--line);border-radius:10px;padding:11px 12px}
.efl{display:block;font-size:11.5px;font-weight:700;color:var(--ink3);margin-bottom:9px}
.efl input,.efl textarea{display:block;width:100%;margin-top:4px;font-family:inherit;font-size:13px;
  font-weight:400;border:1px solid var(--line);border-radius:8px;padding:7px 9px;color:var(--ink);
  background:#fff;outline:none;resize:vertical}
.efl textarea{min-height:50px;line-height:1.5}
.efl input:focus,.efl textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.iconbtn{border:1px solid var(--line);background:var(--card);width:32px;height:32px;border-radius:8px;
  cursor:pointer;font-size:14px;line-height:1;display:grid;place-items:center;color:var(--ink2);transition:.13s;
  font-family:inherit;padding:0}
.iconbtn:hover{background:var(--accent-soft);border-color:#bcdad5;color:var(--accent2)}
.iconbtn.on{background:var(--accent);border-color:var(--accent);color:#fff}
.iconbtn.play.on{background:var(--hot);border-color:var(--hot)}
.sent .idx-badge{position:absolute;left:-1px;top:-1px;font-size:10px;font-weight:700;color:#fff;
  background:var(--hot);padding:1px 6px;border-radius:12px 3px 12px 3px;display:none}
.sent.marked .idx-badge{display:block}
.notready{opacity:.5}

/* ---------------- 听写模式 ---------------- */
.dictbox{width:100%}
.dta{
  display:block;width:100%;min-height:64px;border:1px solid var(--line);border-radius:10px;
  padding:10px 12px;font-family:Georgia,"Iowan Old Style","Times New Roman",serif;
  font-size:16.5px;line-height:1.62;color:var(--ink);background:#fff;outline:none;resize:vertical;
}
.dta::placeholder{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:13.5px;color:#a8adb5}
.dta:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.dictbar{display:flex;align-items:center;gap:9px;margin-top:8px;flex-wrap:wrap}
.dicttip{font-size:12.5px;color:var(--ink3)}
.dictresult{margin-top:11px;border-top:1px dashed #ddd9d1;padding-top:11px}
.dline{display:flex;gap:9px;margin-bottom:7px;align-items:baseline}
.dlab{flex:0 0 48px;font-size:11.5px;font-weight:700;color:var(--ink3);text-align:right;padding-top:4px}
.dtext{flex:1;min-width:0;font-family:Georgia,"Iowan Old Style","Times New Roman",serif;
  font-size:16.5px;line-height:1.65;color:var(--ink)}
.dw{border-radius:3px;padding:0 1px}
.dmiss{background:#fdeaea;color:#b3261e;box-shadow:inset 0 -2px 0 #e9a9a4}   /* 原文里漏掉的词 */
.dnear{background:#fff6e5;box-shadow:inset 0 -2px 0 #ecc98a}                 /* 拼写/连写有出入 */
.dextra{color:#a8adb5;text-decoration:line-through;text-decoration-color:#e0a3a3}  /* 多写的词 */
.dmuted{color:var(--ink3);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:13.5px}
.dtext .w{cursor:pointer}
.dtext .w:hover{text-decoration:underline;text-decoration-color:var(--accent)}
.dtext .w.saved{box-shadow:inset 0 -2px 0 var(--star)}
.dzh{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC",sans-serif;font-size:13.5px;
  line-height:1.55;color:var(--accent2)}
.dgl{font-size:12.5px;line-height:1.55;color:#9a5a12}
.dscore{font-size:12.5px;color:var(--ink2);margin-top:10px;line-height:2.1}
.dscore b{font-size:14.5px}
.dscore b.good{color:#15803d}.dscore b.mid{color:#b45309}.dscore b.bad{color:#b91c1c}
.sent.dictdone{border-color:#dbe7dc}
.dictstat{color:var(--ink2)}
.dictstat b{color:var(--accent2)}

/* ---------------- 短语 & 句式面板 ---------------- */
.phcard{padding:14px 16px;margin-bottom:16px}
.phhead{display:flex;align-items:center;gap:9px;cursor:pointer;user-select:none}
.phtitle{font-weight:700;font-size:14.5px}
.phmeta{font-size:12.5px;color:var(--ink3)}
.phhead .caret{color:var(--ink3);font-size:12px}
.phbody{margin-top:13px;border-top:1px solid var(--line2);padding-top:13px}
.phgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:12px}
.phitem{background:#fbfaf7;border:1px solid var(--line);border-radius:11px;padding:12px 13px}
.phtext{font-family:Georgia,"Iowan Old Style",serif;font-size:17px;font-weight:700;
  color:var(--accent2);line-height:1.45;word-break:break-word}
.phzh{font-size:13px;color:var(--ink);margin-top:5px;line-height:1.5}
.phuse{display:flex;gap:5px;margin-top:7px;flex-wrap:wrap}
.usetag{font-size:11px;font-weight:700;padding:1.5px 7px;border-radius:20px;background:var(--line2);color:var(--ink2)}
.usetag.u1{background:#e9f3ff;color:#1f5fa8}
.usetag.u2{background:#eef2fd;color:#3452b3}
.usetag.u3{background:#fdf0e4;color:#9a5a12}
.usetag.u4{background:#eaf6ee;color:#1c7a3e}
.phwhy{font-size:12.5px;color:var(--ink2);margin-top:8px;line-height:1.55}
.phex{display:flex;gap:8px;align-items:flex-start;margin-top:9px;
  border-top:1px dashed #e3e0d9;padding-top:9px}
.phex .iconbtn{width:28px;height:28px;flex:0 0 28px;font-size:12px}
.phextext{font-family:Georgia,"Iowan Old Style",serif;font-size:13px;color:var(--ink2);line-height:1.5}
.phextext b{color:var(--hot);background:#fff8ee;border-radius:3px;padding:0 2px}

/* ---------------- 长难句语法分析 ---------------- */
.gram{margin-top:11px;background:#f7f8fb;border:1px solid #e2e5ee;border-radius:11px;padding:13px 14px;
  font-size:13.5px;line-height:1.6}
.grammeta{color:var(--ink3);font-size:13px}
.gramerr{color:#b91c1c;font-size:13px}
.gramrow{display:flex;gap:9px;margin-bottom:9px;align-items:baseline}
.gramlab{flex:0 0 58px;font-size:11.5px;font-weight:700;color:#3452b3;text-align:right}
.grambody{flex:1;min-width:0;color:var(--ink)}
.gramlab2{font-size:11.5px;font-weight:700;color:var(--ink3);letter-spacing:.4px;
  text-transform:uppercase;margin:10px 0 7px}
.gramchunks{margin-bottom:4px}
.gramchunk{background:#fff;border:1px solid #e6e9f2;border-radius:9px;padding:8px 10px;margin-bottom:7px}
.grampart{font-family:Georgia,"Iowan Old Style",serif;font-size:14px;color:var(--ink);
  display:block;line-height:1.5;word-break:break-word}
.gramchunkbody{display:flex;gap:8px;flex-wrap:wrap;align-items:baseline;margin-top:4px}
.gramrole{font-size:11.5px;font-weight:700;color:#3452b3;background:#eef2fd;
  border-radius:6px;padding:1px 7px;white-space:nowrap}
.gramzh{font-size:12.5px;color:var(--ink2)}
.gramhard ul{margin:0;padding-left:19px;color:var(--ink2);font-size:13px}
.gramhard li{margin-bottom:4px}
.gramtip{background:#fff8ee;border-left:3px solid #f0c088;border-radius:0 7px 7px 0;
  padding:8px 11px;font-size:13px;color:#8a5312;margin-top:10px}

/* ---------------- import ---------------- */
.two{display:grid;grid-template-columns:1.35fr 1fr;gap:20px;align-items:start}
@media(max-width:1000px){.two{grid-template-columns:1fr}}
.pad{padding:20px}
.drop{
  border:2px dashed #d6d2c9;border-radius:var(--r);padding:30px;text-align:center;
  background:#fdfcfa;transition:.18s;cursor:pointer;
}
.drop:hover,.drop.hot{border-color:var(--accent);background:var(--accent-soft)}
.drop .big{font-size:32px;display:block;margin-bottom:8px}
.drop .hint{font-size:12.5px;color:var(--ink3);margin-top:7px;line-height:1.7}
textarea{
  width:100%;min-height:230px;border:1px solid var(--line);border-radius:11px;padding:13px;
  font-family:Georgia,"Iowan Old Style",serif;font-size:14.5px;line-height:1.65;resize:vertical;
  color:var(--ink);background:var(--card);outline:none;
}
textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
input[type=text]{width:100%;border:1px solid var(--line);border-radius:10px;padding:10px 12px;
  font-size:14px;font-family:inherit;outline:none;color:var(--ink)}
input[type=text]:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field{margin-bottom:14px}
.field>label{display:block;font-size:12.5px;font-weight:700;color:var(--ink2);margin-bottom:6px}
.vlist{max-height:430px;overflow:auto;border:1px solid var(--line);border-radius:11px}
.vrow{display:flex;align-items:center;gap:10px;padding:9px 12px;border-bottom:1px solid var(--line2);
  cursor:pointer;transition:.12s}
.vrow:last-child{border-bottom:0}
.vrow:hover{background:#faf9f7}
.vrow.on{background:var(--accent-soft)}
.vrow .lab{font-weight:700;font-size:13.5px}
.vrow .note{font-size:11.5px;color:var(--ink3);border:0;padding:0;margin:0}
.vrow input[type=radio]{accent-color:var(--accent)}

/* ---------------- vocab ---------------- */
.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:13px}
.vcard{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 15px;position:relative}
.vcard.mastered{opacity:.55;background:#fbfaf8}
.vcard .w{font-family:Georgia,serif;font-size:20px;font-weight:700;letter-spacing:-.2px;margin-bottom:5px}
.vcard .ex{font-family:Georgia,serif;font-size:13px;color:var(--ink2);line-height:1.55;
  border-left:2px solid var(--accent-soft);padding-left:9px;margin:9px 0}
.vcard .mt{font-size:11.5px;color:var(--ink3);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.vcard .acts{margin-top:10px;display:flex;gap:6px}
.vcard textarea{min-height:42px;font-family:inherit;font-size:12.5px;padding:7px 9px;margin-top:8px}

/* ---------------- toast / misc ---------------- */
.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);opacity:0;pointer-events:none;
  background:var(--ink);color:#fff;padding:11px 20px;border-radius:11px;font-size:13.5px;font-weight:600;
  transition:.26s;z-index:200;box-shadow:0 10px 30px rgba(0,0,0,.22);max-width:80vw}
.toast.on{opacity:1;transform:translate(-50%,0)}
.toast.err{background:#b91c1c}
.lesserr{margin-top:9px;padding:9px 12px;background:#fdeaea;border:1px solid #efc3c3;
  border-radius:8px;color:#8a1c14;font-size:12.5px;line-height:1.65}
#staleBar{position:sticky;top:0;z-index:300;background:#fdeaea;border-bottom:1px solid #efc3c3;
  color:#8a1c14;padding:11px 22px;font-size:13px;line-height:1.7;text-align:center}
#staleBar b{color:#a0160c}
kbd{background:var(--line2);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;
  padding:1px 6px;font-size:11.5px;font-family:ui-monospace,Menlo,monospace;color:var(--ink2)}
.help{font-size:12.5px;color:var(--ink3);line-height:2;margin-top:14px}
.rowflex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.spacer{flex:1}
.backbtn{border:0;background:transparent;cursor:pointer;color:var(--ink2);font-size:13.5px;
  font-weight:600;padding:5px 0;display:flex;align-items:center;gap:5px}
.backbtn:hover{color:var(--accent)}
::-webkit-scrollbar{width:11px;height:11px}
::-webkit-scrollbar-thumb{background:#d6d2c9;border-radius:8px;border:3px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#c2bdb2}
::-webkit-scrollbar-track{background:transparent}