:root{
  --bg:#FFF7EC;
  --card:#FFFFFF;
  --blue:#2FB8E6;
  --blue-soft:#EAF8FF;
  --mint:#36C98D;
  --yellow:#FFC73D;
  --coral:#FF7A85;
  --ink:#2B2B3A;
  --grey:#6B7280;
  --grey-soft:#C9CBD1;
  --key:#EAECEF;
  --radius:28px;
  --shadow:0 14px 32px rgba(38,26,13,0.10);
  --shadow-sm:0 4px 12px rgba(38,26,13,0.08);
}

*{box-sizing:border-box;margin:0;padding:0;}

html,body{height:100%;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:"Baloo 2","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  display:flex;
  flex-direction:column;
  min-height:100vh;
  user-select:none;
}

/* ---------- Header ---------- */
.header{
  width:100%;
  height:72px;
  background:#FFFFFF;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 32px;
  box-shadow:0 4px 12px rgba(38,26,13,0.08);
  position:sticky;top:0;z-index:10;
}
.logo{display:flex;align-items:center;gap:10px;}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:var(--blue);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:22px;font-family:"Baloo 2";
}
.logo-text{font-weight:700;font-size:20px;font-family:"Baloo 2";color:var(--ink);}

.grade-sel{
  display:flex;align-items:center;gap:4px;
  background:#F1F3F5;border-radius:999px;padding:5px;
}
.grade-pill{
  border:none;cursor:pointer;font-family:"Baloo 2";font-weight:600;font-size:14px;
  padding:8px 18px;border-radius:999px;background:transparent;color:var(--grey);
  transition:all .15s ease;
}
.grade-pill:hover{color:var(--ink);}
.grade-pill.active{background:var(--blue);color:#fff;}

.stars{display:flex;align-items:center;gap:6px;}
.star-svg{display:block;filter:drop-shadow(0 1px 1px rgba(0,0,0,.08));}
.star-num{font-weight:700;font-size:16px;font-family:"Baloo 2";color:var(--ink);}

/* ---------- Main ---------- */
.main{
  flex:1;
  display:flex;flex-direction:column;align-items:center;
  padding:40px 16px 48px;gap:18px;
}
.card{
  width:820px;max-width:100%;
  background:var(--card);border-radius:var(--radius);
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;align-items:center;
  gap:26px;padding:34px 40px;
}

/* Tabs */
.tabs{display:flex;gap:8px;}
.tab{
  border:none;cursor:pointer;font-family:"Baloo 2";
  padding:10px 22px;border-radius:999px;background:#F1F3F5;color:var(--grey);
  font-weight:600;font-size:15px;transition:all .15s ease;
}
.tab:hover{color:var(--ink);}
.tab.active{background:var(--blue);color:#fff;font-weight:700;}

/* Target */
.target-wrap{
  width:100%;min-height:150px;border-radius:20px;background:var(--blue-soft);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  padding:18px;position:relative;
}
.target-word{
  font-family:"Baloo 2";font-weight:800;font-size:64px;color:var(--ink);
  letter-spacing:1px;line-height:1.1;text-align:center;word-break:break-word;
}
.target-hint{font-size:20px;font-weight:500;color:#9A8C7A;}
.listen-btn{
  display:inline-flex;align-items:center;gap:6px;cursor:pointer;
  border:none;background:#EAF8FF;color:var(--blue);
  font-family:"Baloo 2";font-weight:600;font-size:13px;
  padding:7px 16px;border-radius:999px;margin-top:4px;transition:background .15s ease;
}
.listen-btn:hover{background:#DCEFFB;}
.listen-btn.playing{background:var(--blue);color:#fff;}
.listen-btn.playing svg{fill:#fff;}

/* Input feedback */
.input-wrap{
  width:100%;min-height:76px;border-radius:18px;background:var(--blue-soft);
  display:flex;align-items:center;flex-wrap:wrap;
  padding:0 22px;gap:1px;cursor:text;outline:none;
}
.typed{font-family:"Baloo 2";font-weight:700;font-size:34px;color:var(--mint);}
.next{font-family:"Baloo 2";font-weight:700;font-size:34px;color:var(--blue);}
.rest{font-family:"Baloo 2";font-weight:700;font-size:34px;color:var(--grey-soft);}
.caret{
  width:3px;height:38px;background:var(--blue);border-radius:2px;display:inline-block;
  animation:blink 1s steps(1) infinite;margin:0 2px;
}
@keyframes blink{50%{opacity:0;}}
.input-wrap.done .caret{display:none;}

/* Keyboard */
.kb{width:100%;display:flex;flex-direction:column;align-items:center;gap:10px;}
.kb-row{display:flex;gap:8px;justify-content:center;}
.kb-row.r2{padding:0 26px;}
.kb-row.r3{padding:0 70px;}
.key{
  width:48px;height:48px;border-radius:10px;background:var(--key);
  display:flex;align-items:center;justify-content:center;
  font-family:"Baloo 2";font-weight:700;font-size:20px;color:var(--ink);
  cursor:pointer;transition:transform .08s ease,background .12s ease;
  border:none;font-family:"Baloo 2";
}
.key:active{transform:translateY(2px);}
.key.active{background:var(--blue);color:#fff;box-shadow:0 0 0 4px rgba(47,184,230,.25);}
.key.correct{background:var(--mint);color:#fff;}
.key.wide{width:auto;min-width:320px;padding:0 24px;font-size:14px;font-weight:600;}

/* Actions */
.actions{display:flex;gap:14px;}
.btn-retry,.btn-next{
  border:none;cursor:pointer;font-family:"Baloo 2";border-radius:14px;
  display:inline-flex;align-items:center;gap:8px;transition:all .15s ease;
}
.btn-retry{
  background:#F1F3F5;color:var(--grey);font-weight:600;font-size:16px;padding:14px 30px;
}
.btn-retry:hover{background:#E7EAED;color:var(--ink);}
.btn-next{
  background:var(--blue);color:#fff;font-weight:700;font-size:17px;padding:14px 40px;
}
.btn-next:hover{background:#23A6D2;}
.btn-next .arrow{font-weight:700;}

/* Progress */
.progress{width:100%;display:flex;flex-direction:column;gap:8px;}
.prog-top{display:flex;justify-content:space-between;align-items:center;}
.prog-label{font-family:"Baloo 2";font-weight:600;font-size:14px;color:var(--grey);}
.prog-pct{font-family:"Baloo 2";font-weight:700;font-size:14px;color:var(--blue);}
.prog-bar{width:100%;height:10px;border-radius:999px;background:#EEF1F4;overflow:hidden;}
.prog-fill{height:10px;border-radius:999px;background:var(--mint);width:10%;transition:width .25s ease;}

.hint-text{color:var(--grey);font-size:14px;text-align:center;max-width:560px;}

/* Done mask */
.done-mask{
  position:fixed;inset:0;background:rgba(43,43,58,.45);
  display:flex;align-items:center;justify-content:center;z-index:50;backdrop-filter:blur(2px);
}
.done-mask[hidden]{display:none;}
.done-card{
  background:#fff;border-radius:24px;padding:36px 44px;text-align:center;
  box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:12px;
  animation:pop .25s ease;
}
@keyframes pop{from{transform:scale(.9);opacity:0;}to{transform:scale(1);opacity:1;}}
.done-emoji{font-size:48px;}
.done-title{font-family:"Baloo 2";font-weight:800;font-size:26px;color:var(--ink);}
.done-sub{font-size:15px;color:var(--grey);margin-bottom:6px;}

@media (max-width:680px){
  .header{padding:0 16px;}
  .card{padding:24px 18px;border-radius:20px;}
  .target-word{font-size:44px;}
  .typed,.next,.rest{font-size:26px;}
  .key{width:34px;height:40px;font-size:15px;}
  .kb-row.r2{padding:0 12px;}
  .kb-row.r3{padding:0 34px;}
  .key.wide{min-width:200px;}
}