:root{
  --bg:#0f1216; --bg2:#161b22; --panel:#1b2129; --line:#2a323d;
  --tx:#e6edf3; --tx2:#9aa7b4; --tx3:#6b7885;
  --ac:#4da3ff; --ac2:#7c5cff; --ok:#3fbf7f; --warn:#f0b429; --err:#ff6b6b;
  --r:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background-color:var(--bg);
  background-image:radial-gradient(1200px 600px at 20% -10%,#1d2733 0,var(--bg) 55%);
  background-attachment:fixed;
  color:var(--tx);
  font:15px/1.6 "Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
h1,h2,h3{margin:0 0 .5em}
h2{font-size:19px}
h3{font-size:15px;color:var(--tx)}
p{margin:.35em 0}
code{background:#0d1117;padding:1px 5px;border-radius:5px;font-size:.9em;color:#9fd0ff}
.muted{color:var(--tx2);font-size:13px}
.hidden{display:none !important}

/* ---------- topbar ---------- */
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:14px 24px;border-bottom:1px solid var(--line);
  background:rgba(15,18,22,.82);backdrop-filter:blur(10px);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--ac),var(--ac2));color:#fff;font-weight:700;letter-spacing:.5px;
}
.brand h1{font-size:16px;margin:0}
.brand p{margin:0;font-size:12px;color:var(--tx3)}
.tabs{display:flex;gap:4px;flex-wrap:wrap}
.tab{
  background:none;border:0;color:var(--tx2);padding:8px 14px;border-radius:9px;
  font:inherit;font-size:14px;cursor:pointer;
}
.tab:hover{background:#212936;color:var(--tx)}
.tab.active{background:#243044;color:#cfe6ff}

main{max-width:980px;margin:0 auto;padding:26px 20px 80px}
.view{display:none}
.view.active{display:block}
.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:22px;margin-bottom:18px;
}

/* ---------- buttons ---------- */
.btn{
  background:#273140;border:1px solid #33404f;color:var(--tx);
  padding:9px 16px;border-radius:10px;font:inherit;cursor:pointer;transition:.15s;
}
.btn:hover{background:#31405280;border-color:#456}
.btn.primary{background:linear-gradient(135deg,var(--ac),#3b7fd4);border-color:transparent;color:#fff;font-weight:600}
.btn.primary:hover{filter:brightness(1.1)}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--tx2)}
.btn.ghost:hover{color:var(--tx);border-color:#465468}
.btn.small{padding:6px 12px;font-size:13px}
.btn.big{padding:14px 26px;font-size:16px}
.btn.danger{color:#ff9c9c;border-color:#4a2c2c}
.btn:disabled{opacity:.45;cursor:not-allowed}

input,select,textarea{
  background:#12171e;border:1px solid var(--line);color:var(--tx);
  border-radius:9px;padding:8px 11px;font:inherit;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--ac)}
textarea{width:100%;min-height:110px;resize:vertical;line-height:1.7}
label.inline{display:inline-flex;align-items:center;gap:8px;margin:6px 14px 6px 0;font-size:14px;color:var(--tx2)}
.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:12px}

/* ---------- mode picker ---------- */
.mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin:16px 0}
.mode-card{
  text-align:left;background:#141a22;border:1px solid var(--line);border-radius:12px;
  padding:16px;cursor:pointer;color:var(--tx);font:inherit;transition:.15s;
}
.mode-card:hover{border-color:#456;transform:translateY(-2px)}
.mode-card.sel{border-color:var(--ac);background:#182534;box-shadow:0 0 0 1px var(--ac) inset}
.mode-card strong{display:block;font-size:16px;margin:8px 0 4px}
.mode-card p{font-size:12.5px;color:var(--tx2);margin:0}
.mode-tag{font-size:11px;letter-spacing:.5px;text-transform:uppercase;color:var(--ac)}
.mode-card.accent .mode-tag{color:var(--ac2)}
.mode-foot{display:flex;align-items:flex-end;gap:14px;flex-wrap:wrap;justify-content:space-between}
.mode-foot label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--tx2);flex:1;min-width:240px}
.hint{font-size:13px;color:var(--warn);margin-top:12px}
.hint:empty{display:none}

/* 麦克风自检提示 */
.alert{
  background:rgba(240,180,41,.07);border:1px solid rgba(240,180,41,.35);
  border-left:3px solid var(--warn);border-radius:10px;padding:13px 15px;margin-top:12px;
}
.alert.ok{background:rgba(63,191,127,.07);border-color:rgba(63,191,127,.35);border-left-color:var(--ok)}
.alert b{color:var(--tx);font-size:14.5px;display:block;margin-bottom:5px}
.alert p{color:var(--tx2);font-size:13.5px;margin:5px 0}
.alert .btn{margin-top:4px}
.alert .diag{
  display:block;margin-top:9px;font-size:11.5px;color:var(--tx3);
  background:#0d1117;padding:6px 9px;border-radius:6px;line-height:1.7;
}

/* ---------- stage ---------- */
.stage-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.pill{
  display:inline-block;background:#243044;color:#bcd9ff;border-radius:999px;
  padding:3px 11px;font-size:12px;margin-right:6px;
}
.pill.ghost{background:#1e242d;color:var(--tx2)}
.question-box{background:#141a22;border:1px solid var(--line);border-left:3px solid var(--ac);border-radius:10px;padding:18px 20px}
.q-en{font-size:19px;font-weight:600;line-height:1.5;margin:0}
.q-zh{color:var(--tx2);font-size:13.5px;margin:6px 0 0}
.cue{margin:12px 0 0;padding-left:20px;color:var(--tx2);font-size:14.5px}
.cue li{margin:3px 0}

.prep,.speak{margin-top:16px;background:#141a22;border:1px solid var(--line);border-radius:10px;padding:16px}
.timer-row{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.timer-row h3{margin:0}
.timer-row>div:nth-child(2){flex:1;min-width:180px}
.ring{
  width:70px;height:70px;border-radius:50%;display:grid;place-items:center;flex:none;
  border:3px solid #2e3b4b;font-size:17px;font-weight:700;color:#cfe6ff;font-variant-numeric:tabular-nums;
}
.ring.live{border-color:var(--err);animation:pulse 1.6s infinite}
.ring.warnc{border-color:var(--warn)}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(255,107,107,.35)}50%{box-shadow:0 0 0 9px rgba(255,107,107,0)}}
.meter{height:7px;background:#222b36;border-radius:4px;overflow:hidden;margin-bottom:8px}
.meter i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--ok),var(--ac));transition:width .1s}
.transcript{
  margin-top:14px;background:#0d1117;border:1px solid var(--line);border-radius:9px;
  padding:14px 16px;min-height:90px;max-height:260px;overflow:auto;line-height:1.8;font-size:15px;
}
.transcript .ph{color:var(--tx3)}
.transcript .interim{color:var(--tx3);font-style:italic}
.stage-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}

/* ---------- report ---------- */
.rep-head{display:flex;gap:22px;align-items:center;flex-wrap:wrap;margin-bottom:6px}
.band{
  min-width:112px;text-align:center;background:#141a22;border:1px solid var(--line);
  border-radius:12px;padding:12px 16px;
}
.band b{display:block;font-size:36px;line-height:1.1;background:linear-gradient(135deg,var(--ac),var(--ac2));-webkit-background-clip:text;background-clip:text;color:transparent}
.band span{font-size:12px;color:var(--tx2)}
.sub-scores{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;flex:1;min-width:260px}
.sub{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.sub .k{font-size:12px;color:var(--tx2);display:flex;justify-content:space-between}
.sub .bar{height:6px;background:#222b36;border-radius:3px;margin-top:7px;overflow:hidden}
.sub .bar i{display:block;height:100%;border-radius:3px;background:var(--ac)}
.metrics{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}
.metric{background:#141a22;border:1px solid var(--line);border-radius:9px;padding:8px 14px;font-size:13px;color:var(--tx2)}
.metric b{color:var(--tx);font-size:16px;margin-right:6px;font-variant-numeric:tabular-nums}

.sec{margin-top:22px;border-top:1px solid var(--line);padding-top:18px}
.sec>h3{display:flex;align-items:center;gap:9px;font-size:16px}
.sec>h3 .n{
  width:23px;height:23px;border-radius:7px;background:#243044;color:#bcd9ff;
  display:grid;place-items:center;font-size:12px;flex:none;
}

/* corrections */
.fix{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:9px 0;border-left:3px solid var(--warn)}
.fix.err{border-left-color:var(--err)}
.fix.tip{border-left-color:var(--ac)}
.fix .ttl{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.fix .type{font-size:11px;background:#243044;color:#bcd9ff;padding:2px 8px;border-radius:999px}
.fix .bad{color:#ff9c9c;text-decoration:line-through wavy rgba(255,107,107,.5)}
.fix .good{color:#8ee0b0;font-weight:600}
.fix .ctx{font-size:13px;color:var(--tx2);margin-top:6px;font-style:italic}
.fix .why{font-size:13px;color:var(--tx2);margin-top:4px}
.empty{color:var(--tx2);background:#141a22;border:1px dashed var(--line);border-radius:10px;padding:18px;text-align:center}

/* framework */
.fw{display:flex;flex-direction:column;gap:0;margin-top:10px}
.fw-step{display:flex;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line)}
.fw-step:last-child{border-bottom:0}
.fw-dot{
  width:26px;height:26px;border-radius:50%;flex:none;display:grid;place-items:center;
  font-size:13px;font-weight:700;background:#222b36;color:var(--tx3);
}
.fw-step.hit .fw-dot{background:rgba(63,191,127,.16);color:var(--ok)}
.fw-step.miss .fw-dot{background:rgba(255,107,107,.14);color:var(--err)}
.fw-b strong{font-size:14.5px}
.fw-b p{font-size:13px;color:var(--tx2);margin:2px 0 0}
.fw-b .said{font-size:13px;color:#8ee0b0;margin-top:4px}
.fw-b .todo{font-size:13px;color:#ffb3b3;margin-top:4px}
.outline{background:#0d1117;border:1px solid var(--line);border-radius:9px;padding:12px 16px;margin-top:12px}
.outline li{margin:4px 0;font-size:14px}
.outline .lab{color:var(--ac);font-size:12px;margin-right:6px}

/* vocab */
.voc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:10px;margin-top:10px}
.vcard{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:12px 14px;position:relative}
.vcard.used{border-color:rgba(63,191,127,.5)}
.vcard .en{font-weight:600;color:#cfe6ff;font-size:15px;padding-right:26px}
.vcard .zh{font-size:13px;color:var(--tx2)}
.vcard .ex{font-size:13px;color:var(--tx3);margin-top:6px;font-style:italic}
.vcard .add{position:absolute;top:9px;right:9px;background:none;border:0;color:var(--tx3);cursor:pointer;font-size:17px;line-height:1}
.vcard .add:hover{color:var(--ac)}
.vcard .add.on{color:var(--ok)}
.tagline{display:flex;gap:6px;flex-wrap:wrap;margin-top:8px}
.chip{background:#243044;color:#bcd9ff;border-radius:999px;padding:3px 10px;font-size:12.5px}
.chip.up{background:#2c2438;color:#d8c6ff}

/* ai */
.ai-box{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-top:10px;white-space:pre-wrap;line-height:1.75;font-size:14.5px}
.spinner{display:inline-block;width:14px;height:14px;border:2px solid var(--tx3);border-top-color:var(--ac);border-radius:50%;animation:spin .8s linear infinite;vertical-align:-2px;margin-right:7px}
@keyframes spin{to{transform:rotate(360deg)}}

/* 发音与节奏 */
.plist{display:flex;flex-direction:column;gap:2px;margin-top:12px}
.pitem{display:flex;gap:11px;padding:11px 0;border-bottom:1px dashed var(--line)}
.pitem:last-child{border-bottom:0}
.pitem b{font-size:14.5px}
.pitem p{font-size:13px;color:var(--tx2);margin:3px 0 0}
.pitem .pv{margin-left:9px;font-size:13px;color:#cfe6ff;font-variant-numeric:tabular-nums}
.pdot{width:9px;height:9px;border-radius:50%;flex:none;margin-top:7px}
.pdot.good{background:var(--ok)}
.pdot.mid{background:var(--warn)}
.pdot.bad{background:var(--err)}

/* ---------- bank / lists ---------- */
.bank-head{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.bank-head h2{margin:0;flex:1;min-width:150px}
.bank-head input{flex:1;min-width:180px}
.count{background:#243044;color:#bcd9ff;border-radius:999px;padding:2px 10px;font-size:12px;vertical-align:middle}
.bank-list,.mis-list,.voc-list,.hist-list{display:flex;flex-direction:column;gap:9px}
.bank-item{
  background:#141a22;border:1px solid var(--line);border-radius:10px;padding:12px 14px;
  display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;
}
.bank-item .t{font-size:15px}
.bank-item .s{font-size:12.5px;color:var(--tx2);margin-top:3px}
.mis-item{background:#141a22;border:1px solid var(--line);border-left:3px solid var(--warn);border-radius:10px;padding:12px 14px}
.mis-item .meta{font-size:12px;color:var(--tx3);margin-top:6px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.voc-item{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:11px 14px;display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.hist-item{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:11px 14px;display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap;cursor:pointer}
.hist-item:hover{border-color:#456}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;margin-bottom:16px}
.stat{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center}
.stat b{display:block;font-size:24px;color:#cfe6ff}
.stat span{font-size:12px;color:var(--tx2)}

/* quiz */
.quiz{background:#141a22;border:1px solid var(--line);border-radius:10px;padding:18px;margin-bottom:14px;text-align:center}
.quiz .zh{font-size:20px;margin-bottom:12px}
.quiz input{width:min(360px,100%);text-align:center;font-size:16px}
.quiz .fb{margin-top:10px;font-size:15px;min-height:24px}
.quiz .fb.ok{color:var(--ok)}
.quiz .fb.no{color:var(--err)}

.setting{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}
.setting:first-of-type{border-top:0;margin-top:0}
audio{width:100%;margin-top:12px;filter:invert(.9) hue-rotate(180deg)}

@media(max-width:640px){
  main{padding:16px 12px calc(40px + env(safe-area-inset-bottom))}
  .panel{padding:16px}
  .q-en{font-size:17px}
  .topbar{
    padding:10px max(12px,env(safe-area-inset-left)) 10px max(12px,env(safe-area-inset-right));
    padding-top:calc(10px + env(safe-area-inset-top));
  }
  .brand p{display:none}
  .tabs{gap:2px;width:100%;justify-content:space-between}
  .tab{padding:8px 9px;font-size:13.5px;flex:1;text-align:center}
  /* iOS 上 <16px 的输入框会在聚焦时自动放大页面 */
  input,select,textarea{font-size:16px}
  .btn{padding:11px 16px}
  .btn.big{padding:16px 22px;width:100%}
  .stage-actions .btn{flex:1;min-width:44%}
  .stage-actions .btn.big{flex:1 0 100%}   /* 主操作独占一行，方便单手点 */
  .mode-foot{flex-direction:column;align-items:stretch}
  .mode-foot .btn{width:100%}
  .ring{width:58px;height:58px;font-size:15px}
  .timer-row{gap:12px}
  .timer-row .btn{width:100%}
  .transcript{max-height:200px;font-size:16px}
  .metrics{gap:7px}
  .metric{padding:7px 10px;font-size:12px}
  .voc-grid{grid-template-columns:1fr}
  .bank-head{gap:8px}
  .bank-head h2{width:100%}
  .bank-item,.voc-item{align-items:flex-start}
}
/* 装到主屏后（standalone）顶栏不再吸顶跳动 */
@media(display-mode:standalone){
  .topbar{position:static}
}