/* 单词磨耳朵 · PWA 主样式：无外部依赖，纯系统字体，支持多主题与自适应 */
*{box-sizing:border-box}
:root{
  --bg:#eef4e8; --bg2:#e3eedb; --card:#ffffff; --ink:#1d2b1d; --muted:#64745f;
  --line:#d3e0c9; --brand:#2e7d32; --brand2:#43a047; --brand-ink:#ffffff;
  --hero1:#1b5e20; --hero2:#2e7d32; --hero3:#66bb6a;
  --chip:#e8f5e9; --chip-ink:#2e7d32; --shadow:0 8px 28px rgba(27,94,32,.12);
  --radius:18px; --radius-sm:12px;
  --danger:#d32f2f; --ok:#2e7d32; --warn:#ef6c00;
}
[data-theme="pixel"]{
  --bg:#eef2ff; --card:#ffffff; --ink:#1f2430; --muted:#6b7280;
  --line:#c7d2fe; --brand:#2563eb; --brand2:#60a5fa; --brand-ink:#ffffff;
  --hero1:#1e3a8a; --hero2:#2563eb; --hero3:#93c5fd;
  --chip:#eef2ff; --chip-ink:#3730a3; --shadow:0 8px 0 rgba(30,58,138,.12);
  --radius:6px; --radius-sm:4px;
}
[data-theme="ocean"]{
  --bg:#e0f2f1; --card:#ffffff; --ink:#12343a; --muted:#5b7d82;
  --line:#b2dfdb; --brand:#00838f; --brand2:#26a69a; --brand-ink:#ffffff;
  --hero1:#004d40; --hero2:#00838f; --hero3:#4db6ac;
  --chip:#e0f2f1; --chip-ink:#00695c; --shadow:0 8px 28px rgba(0,131,143,.12);
}
[data-theme="sunset"]{
  --bg:#fff3e0; --card:#ffffff; --ink:#3e2723; --muted:#8d6e63;
  --line:#ffccbc; --brand:#e65100; --brand2:#fb8c00; --brand-ink:#ffffff;
  --hero1:#bf360c; --hero2:#ef6c00; --hero3:#ffb74d;
  --chip:#fff3e0; --chip-ink:#bf360c; --shadow:0 8px 28px rgba(230,81,0,.12);
}
[data-theme="night"]{
  --bg:#12181f; --bg2:#1a232e; --card:#1e2a38; --ink:#eaf2f8; --muted:#9fb3c8;
  --line:#2f4356; --brand:#4fc3f7; --brand2:#29b6f6; --brand-ink:#102a43;
  --hero1:#0d47a1; --hero2:#1565c0; --hero3:#42a5f5;
  --chip:#173a52; --chip-ink:#81d4fa; --shadow:0 8px 28px rgba(0,0,0,.35);
}
html{scroll-behavior:smooth}
body{
  margin:0; font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.6;
  -webkit-text-size-adjust:100%; padding-bottom:env(safe-area-inset-bottom);
}
[data-theme="pixel"] body{font-family:"Fusion Pixel Font","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
a{color:var(--brand)}
button,input,select{font:inherit}
button{cursor:pointer}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px 64px}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:14px 2px 0;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.logo .mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--hero1),var(--hero3));display:grid;place-items:center;font-size:22px;color:#fff;box-shadow:var(--shadow)}
[data-theme="pixel"] .logo .mark{border-radius:4px;image-rendering:pixelated}
.top-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
select,.field{border:2px solid var(--line);border-radius:var(--radius-sm);background:var(--card);color:var(--ink);padding:8px 10px;min-height:44px}
.hero{
  margin:16px 0 18px;border-radius:24px;padding:clamp(22px,4vw,34px);color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(125deg,var(--hero1),var(--hero2) 55%,var(--hero3));box-shadow:var(--shadow);
}
.hero::after{content:"AaBbCc";position:absolute;right:14px;bottom:-30px;font-size:clamp(80px,18vw,130px);font-weight:900;color:rgba(255,255,255,.12);letter-spacing:-6px;pointer-events:none;white-space:nowrap}
.hero h1{margin:0 0 6px;font-size:clamp(26px,5vw,38px);line-height:1.2}
.hero p{margin:0;opacity:.94;max-width:680px;font-size:clamp(14px,2.5vw,16px)}
.stats{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;position:relative;z-index:1}
.stat{background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:6px 13px;font-size:14px}
.stat b{font-size:15px}
.tabs{display:flex;gap:8px;flex-wrap:wrap;position:sticky;top:8px;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);padding:8px;border-radius:16px;backdrop-filter:blur(6px)}
.tab{border:2px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:10px 16px;font-size:15px;font-weight:600;min-height:44px}
.tab[aria-selected="true"]{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.view{display:none}
.view.active{display:block}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);margin-top:16px}
.controls{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.search{flex:1 1 260px;display:flex;align-items:center;gap:8px;border:2px solid var(--line);border-radius:var(--radius-sm);padding:9px 12px;background:var(--card);min-height:48px}
.search input{border:0;outline:0;flex:1;font-size:16px;background:transparent;color:var(--ink);min-width:0}
.search:focus-within{border-color:var(--brand)}
.seg{display:flex;border:2px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;background:var(--card)}
.seg button{border:0;background:transparent;padding:9px 13px;font-size:14px;color:var(--muted);min-height:44px}
.seg button[aria-pressed="true"]{background:var(--brand);color:var(--brand-ink);font-weight:700}
.btn{border:0;border-radius:var(--radius-sm);padding:10px 16px;font-size:15px;background:var(--brand);color:var(--brand-ink);font-weight:650;min-height:44px;white-space:nowrap}
.btn.ghost{background:transparent;color:var(--brand);border:2px solid var(--line)}
.btn.soft{background:var(--chip);color:var(--chip-ink)}
.btn.warn{background:var(--warn)}
.btn:disabled{opacity:.55;cursor:default}
.btn.playing{background:var(--warn)}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.chip{border:2px solid var(--line);background:var(--card);color:var(--ink);border-radius:999px;padding:7px 12px;font-size:14px;min-height:38px}
.chip[aria-pressed="true"]{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.status{margin:16px 2px 10px;color:var(--muted);font-size:14px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:6px;cursor:pointer;transition:transform .12s ease}
.card:hover{transform:translateY(-2px)}
.card .idx{font-size:12px;color:var(--muted);letter-spacing:1px}
.card .word{font-size:30px;font-weight:800;line-height:1.15;word-break:break-word}
.emoji{font-size:38px;line-height:1.2}
.phonics{display:flex;flex-wrap:wrap;gap:6px;margin:2px 0}
.phonics span{background:var(--chip);color:var(--chip-ink);border-radius:8px;padding:2px 9px;font-size:14px;font-weight:700}
.ear-emoji{font-size:72px;line-height:1.1;min-height:1.1em}
.ear-phonics{justify-content:center;margin:10px 0}
.ear-phonics span{font-size:20px;padding:4px 12px}
.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.pill{background:var(--chip);color:var(--chip-ink);border-radius:999px;padding:3px 10px;font-size:13px;font-weight:600}
.pos{background:var(--bg2);color:var(--muted);border-radius:6px;padding:2px 7px;font-size:13px}
.zh{font-size:16px;min-height:24px}
.play{margin-top:auto;padding-top:10px;display:flex;gap:8px;align-items:center}
.play .btn{flex:1}
.iconbtn{border:2px solid var(--line);background:var(--card);color:var(--ink);border-radius:10px;width:44px;height:44px;font-size:19px;line-height:1}
.iconbtn.on{background:#fff3cd;border-color:#f9c74f}
.note{font-size:13px;color:var(--muted)}
.empty{grid-column:1/-1;text-align:center;padding:44px 16px;color:var(--muted);background:var(--card);border:1px dashed var(--line);border-radius:var(--radius)}
.pager{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:22px;flex-wrap:wrap}
.pager input{width:68px;padding:8px;font-size:15px;text-align:center;border:2px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink)}
/* 磨耳朵大卡 */
.earcard{text-align:center;padding:clamp(20px,5vw,40px) 18px}
.earcard .bigword{font-size:clamp(44px,11vw,76px);font-weight:900;line-height:1.1;word-break:break-word;min-height:1.2em}
.earcard .bigword.hidden-word{color:transparent;text-shadow:0 0 0 var(--muted);letter-spacing:.08em}
.earcard .bigzh{font-size:clamp(19px,4vw,26px);min-height:1.5em;color:var(--ink)}
.earcard .bigipa{color:var(--muted);font-size:18px;min-height:1.4em}
.progress{height:12px;background:var(--bg2);border-radius:999px;overflow:hidden;margin:14px 0 6px}
.progress>i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:999px}
.earbtns{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:16px}
.earbtns .btn{flex:1 1 150px}
/* 测验 */
.quiz-q{font-size:clamp(30px,7vw,44px);font-weight:800;text-align:center;margin:8px 0}
.quiz-sub{text-align:center;color:var(--muted)}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.opt{border:2px solid var(--line);background:var(--card);color:var(--ink);border-radius:14px;padding:14px;text-align:left;font-size:16px;min-height:56px}
.opt.correct{border-color:var(--ok);background:#e8f5e9;color:#1b5e20}
.opt.wrong{border-color:var(--danger);background:#fce8e8;color:#7f1d1d}
[data-theme="night"] .opt.correct{background:#173a24;color:#c8e6c9}
[data-theme="night"] .opt.wrong{background:#3d1d1d;color:#ffcdd2}
.spellinput{width:100%;padding:14px;font-size:20px;border:2px solid var(--line);border-radius:14px;background:var(--card);color:var(--ink);text-align:center}
.score{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:10px}
/* 课文 */
.track{display:flex;justify-content:space-between;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px;margin:8px 0}
.track.playing{border-color:var(--brand);outline:2px solid var(--brand)}
.track .t{font-weight:650}
.track .d{color:var(--muted);font-size:13px;white-space:nowrap}
.playerbox{position:sticky;top:72px;z-index:10}
.playerbox audio{width:100%;margin-top:8px}
/* 我的 */
.statgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.statcard{background:var(--bg2);border-radius:14px;padding:16px;text-align:center}
.statcard b{display:block;font-size:30px}
.statcard span{color:var(--muted);font-size:14px}
code{background:var(--chip);color:var(--chip-ink);padding:2px 7px;border-radius:6px;font-size:13px;word-break:break-all}
pre{white-space:pre-wrap;word-break:break-all;background:var(--bg2);border-radius:12px;padding:12px;font-size:13px;overflow:auto}
footer{margin-top:28px;font-size:14px;color:var(--muted)}
/* 弹窗与提示 */
dialog{border:1px solid var(--line);border-radius:20px;padding:0;max-width:560px;width:calc(100% - 32px);background:var(--card);color:var(--ink);box-shadow:var(--shadow)}
dialog::backdrop{background:rgba(0,0,0,.45)}
.modal{padding:22px}
.modal .mword{font-size:44px;font-weight:900;word-break:break-word}
.modal .mzh{font-size:19px;margin-top:6px}
.modalbtns{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.modalbtns .btn{flex:1}
#toast{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:999px;font-size:15px;z-index:100;max-width:calc(100% - 32px);text-align:center;display:none;box-shadow:var(--shadow)}
#toast.show{display:block}
.installbar{display:none;margin-top:14px}
.installbar.show{display:block}
@media (max-width:640px){
  .wrap{padding:0 12px 72px}
  .tabs{position:fixed;left:12px;right:12px;bottom:calc(10px + env(safe-area-inset-bottom));top:auto;justify-content:space-between;padding:6px;box-shadow:var(--shadow)}
  .tab{flex:1;padding:10px 4px;font-size:13px;text-align:center}
  .opts{grid-template-columns:1fr}
  .hero{border-radius:20px}
  .playerbox{top:8px}
  .grid{grid-template-columns:1fr}
  .topbar{padding-top:10px}
}
@media (min-width:900px){
  .grid{grid-template-columns:repeat(3,1fr)}
}