/* ===================== English Drill — styles ===================== */
:root{
  --blue:#2f6fed; --blue-d:#1f54c0; --orange:#ff8a3d; --orange-d:#e96f1e;
  --green:#28a45c; --yellow:#f4c430; --red:#e3453b; --grey:#7a8699;
  --ink:#1f2733; --bg:#f3f6fc; --card:#ffffff; --line:#e3e9f4;
  --radius:18px; --shadow:0 6px 20px rgba(31,39,51,.08);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--ink); -webkit-font-smoothing:antialiased;
}
#app{max-width:880px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}

/* top bar */
#topbar{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--card);
  box-shadow:var(--shadow);position:sticky;top:0;z-index:20}
.brand{font-weight:800;font-size:18px;color:var(--blue)}
.year-chip{background:var(--orange);color:#fff;font-weight:700;padding:6px 12px;border-radius:999px;font-size:14px;cursor:pointer}
#topnav{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
#topnav button{background:#eef3ff;border:none;color:var(--blue-d);font-weight:600;
  padding:7px 11px;border-radius:10px;font-size:13px;cursor:pointer}
#topnav button:active{transform:scale(.96)}
#topnav button:hover{background:#e0e9ff}

main{flex:1;padding:18px 16px 30px}
.screen{display:none;animation:fade .25s ease}
.screen.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* home */
.home-hero{text-align:center;padding:18px 8px 8px}
.home-hero h1{font-size:30px;margin:6px 0;color:var(--blue-d)}
.sub{color:var(--grey);font-size:15px;margin:4px 0}
.hint{color:var(--grey);font-size:14px}
.year-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:22px 0}
.year-btn{background:var(--card);border:2px solid var(--line);border-radius:var(--radius);
  padding:22px 10px;text-align:center;cursor:pointer;box-shadow:var(--shadow);transition:.15s}
.year-btn:hover{border-color:var(--blue);transform:translateY(-3px)}
.year-btn .ybig{font-size:34px;font-weight:800;color:var(--blue)}
.year-btn .ylbl{font-size:13px;color:var(--grey);margin-top:4px}
.year-btn.done{border-color:var(--green)}
.footnote{text-align:center;color:var(--grey);font-size:12px;margin-top:10px}

/* dashboard */
.dash-head h2{margin:4px 0 14px;color:var(--blue-d)}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px}
.stat{background:var(--card);border-radius:14px;padding:14px 8px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-size:26px;font-weight:800;color:var(--blue)}
.stat-lbl{font-size:12px;color:var(--grey);margin-top:2px}
.weak-cards{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.weak-card{background:#fff4ec;border:1px solid #ffd9bf;color:var(--orange-d);
  padding:8px 12px;border-radius:12px;font-size:13px;font-weight:600;cursor:pointer}
.weak-card:hover{background:#ffe9da}
.big-btns{display:flex;flex-direction:column;gap:12px}
.big{width:100%;border:none;border-radius:14px;padding:18px;font-size:18px;font-weight:700;
  cursor:pointer;box-shadow:var(--shadow);transition:.15s;background:var(--card);color:var(--ink)}
.big:active{transform:scale(.98)}
.big.primary{background:var(--blue);color:#fff}
.big.primary:hover{background:var(--blue-d)}
.big:hover{background:#eef3ff}

/* practice */
.practice-top{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.p-skill{background:#eef3ff;color:var(--blue-d);font-weight:700;padding:6px 12px;border-radius:999px;font-size:13px;flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-progress{font-weight:700;color:var(--grey);font-size:14px}
.rule-btn{background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px 10px;font-size:13px;cursor:pointer;white-space:nowrap}
.progress-track{height:8px;background:var(--line);border-radius:99px;overflow:hidden;margin-bottom:18px}
.progress-fill{height:100%;width:0;background:var(--green);transition:width .3s}
.p-card{background:var(--card);border-radius:var(--radius);padding:26px 20px;box-shadow:var(--shadow);min-height:200px;display:flex;flex-direction:column;justify-content:center}
.p-prompt{font-size:22px;line-height:1.5;font-weight:600;margin-bottom:20px}
.p-options{display:grid;gap:12px}
.opt{background:#f6f9ff;border:2px solid var(--line);border-radius:14px;padding:16px;font-size:18px;
  cursor:pointer;transition:.12s;text-align:left;color:var(--ink)}
.opt:hover{border-color:var(--blue)}
.opt.correct{background:#e6f7ec;border-color:var(--green);color:var(--green)}
.opt.wrong{background:#fdecea;border-color:var(--red);color:var(--red)}
.opt.dim{opacity:.5;pointer-events:none}
.p-input-wrap{display:flex;gap:8px;align-items:center;margin-top:6px}
#pInput{flex:1;font-size:22px;padding:14px;border:2px solid var(--line);border-radius:12px;outline:none}
#pInput:focus{border-color:var(--blue)}
.speak-btn{background:#eef3ff;border:none;border-radius:12px;font-size:20px;padding:12px 14px;cursor:pointer}
.submit-btn{background:var(--blue);color:#fff;border:none;border-radius:12px;padding:0 22px;font-size:17px;font-weight:700;cursor:pointer;height:52px}
.p-feedback{margin-top:16px;font-size:17px;line-height:1.5;min-height:24px}
.p-feedback.ok{color:var(--green)}
.p-feedback.no{color:var(--red)}
.p-feedback .zh{display:block;color:var(--grey);font-size:14px;margin-top:4px}
.next-btn{margin-top:16px;width:100%;background:var(--green);color:#fff;border:none;border-radius:14px;
  padding:16px;font-size:18px;font-weight:700;cursor:pointer}

/* map */
.map-body{display:flex;flex-direction:column;gap:14px;margin-top:10px}
.map-group{background:var(--card);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.map-group h4{margin:0 0 10px;color:var(--blue-d);font-size:15px}
.map-dots{display:flex;flex-wrap:wrap;gap:8px}
.map-dot{font-size:12px;padding:7px 11px;border-radius:10px;font-weight:600;cursor:default}
.dot-green{background:#e6f7ec;color:var(--green)}
.dot-yellow{background:#fff8e1;color:#b8860b}
.dot-red{background:#fdecea;color:var(--red);cursor:pointer}
.dot-grey{background:#eef1f6;color:var(--grey)}

/* mistakes */
.mis-body{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.mis-item{background:var(--card);border-radius:12px;padding:12px 14px;box-shadow:var(--shadow);font-size:15px}
.mis-item .m-q{font-weight:600}
.mis-item .m-a{color:var(--red);margin-top:4px;font-size:14px}
.mis-item .m-y{color:var(--green);margin-top:2px;font-size:14px}
.mis-empty{color:var(--grey);text-align:center;padding:30px}

/* words list */
.words-body{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.word-chip{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px 12px;font-size:15px;box-shadow:var(--shadow)}

/* print */
.print-opts{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.print-pick{background:var(--card);border:2px solid var(--line);border-radius:12px;padding:12px 14px;font-size:14px;font-weight:600;cursor:pointer}
.print-pick.active{border-color:var(--blue);background:#eef3ff;color:var(--blue-d)}
.print-actions{display:flex;gap:10px;margin-bottom:14px}
.print-preview{background:#fff;border-radius:12px;padding:20px;box-shadow:var(--shadow);min-height:120px}

/* modal */
.modal{position:fixed;inset:0;background:rgba(20,28,40,.5);display:none;align-items:center;justify-content:center;z-index:50;padding:18px}
.modal.show{display:flex}
.modal-box{background:#fff;border-radius:18px;padding:22px;max-width:520px;width:100%;max-height:84vh;overflow:auto;position:relative}
.modal-close{position:absolute;top:12px;right:14px;border:none;background:#eef1f6;border-radius:50%;width:32px;height:32px;font-size:16px;cursor:pointer}
#ruleTitle{margin:0 0 12px;color:var(--blue-d)}
#ruleBody{font-size:16px;line-height:1.6}
#ruleBody .ex{background:#f6f9ff;border-radius:10px;padding:10px;margin-top:10px;font-size:15px}
#sumBody{font-size:16px;line-height:1.6;margin-bottom:16px}

#footer{text-align:center;color:var(--grey);font-size:12px;padding:14px}

/* ===== PRINT (A4) ===== */
@media print{
  body{background:#fff}
  #topbar,#footer,#topnav,.print-opts,.print-actions{display:none !important}
  #app{max-width:none;margin:0}
  main{padding:0}
  .screen{display:none !important}
  #screen-print{display:block !important}
  .print-preview{box-shadow:none;padding:0}
  .print-sheet{display:block !important}
  .answers-page{break-before:page}
  .no-print{display:none !important}
  @page{size:A4;margin:16mm}
}
.print-sheet{max-width:760px;margin:0 auto;font-family:"Segoe UI",system-ui,sans-serif;color:#1f2733}
.print-sheet h1{font-size:22px;text-align:center;margin:0 0 4px}
.print-sheet .meta{text-align:center;color:#7a8699;font-size:13px;margin-bottom:16px}
.qrow{page-break-inside:avoid;margin:10px 0;font-size:16px;line-height:1.7}
.qrow .qno{font-weight:800;color:#2f6fed;margin-right:8px}
.answers-page h2{font-size:18px;border-bottom:2px solid #2f6fed;padding-bottom:6px}
.acrow{page-break-inside:avoid;font-size:15px;margin:6px 0}
.acrow .qno{font-weight:800;color:#28a45c;margin-right:8px}