:root{
  --bg:#f7f5fb; --surface:#fff; --surface-2:#f1eefb; --surface-3:#ece7fa;
  --line:#e7e2f1; --text:#2c2741; --muted:#8c86a3; --faint:#b3aec5;
  --brand:#7c6bf2; --brand-soft:#efecff; --brand-text:#5b49d6; --accent:#ff7d95;
  --shadow:0 12px 40px rgba(58,42,120,.09); --shadow-sm:0 4px 16px rgba(58,42,120,.07);
  --radius:20px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#16141f; --surface:#211e2e; --surface-2:#2a2638; --surface-3:#322d43;
    --line:#373246; --text:#f0edf9; --muted:#a29cb6; --faint:#7d7696;
    --brand:#9b8bff; --brand-soft:#332c53; --brand-text:#c3b8ff; --accent:#ff91a6;
    --shadow:0 12px 40px rgba(0,0,0,.35); --shadow-sm:0 4px 16px rgba(0,0,0,.25);
  }
}
*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{
  background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
button,input,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
.hidden{display:none !important}
#app{position:relative;height:100dvh;overflow:hidden}
.screen{position:absolute;inset:0;display:none;flex-direction:column}
.screen.active{display:flex}

/* ---------- landing ---------- */
#landing{overflow-y:auto;background:
  radial-gradient(1000px 520px at 12% -8%,rgba(124,107,242,.13),transparent 65%),
  radial-gradient(760px 460px at 95% 100%,rgba(255,125,149,.12),transparent 65%),var(--bg)}
.landing-inner{width:min(100%,520px);margin:auto;padding:40px 22px 32px;text-align:center}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:600;letter-spacing:.06em}
.brand-mark{position:relative;display:inline-block;width:30px;height:26px;flex:none}
.brand-mark i{position:absolute;width:19px;height:16px;border-radius:9px 9px 9px 3px;display:block}
.brand-mark i:first-child{left:0;top:0;background:var(--brand);opacity:.9}
.brand-mark i:last-child{right:0;bottom:0;background:var(--accent);border-radius:9px 9px 3px 9px;opacity:.92}
.brand-mark.small{transform:scale(.72);transform-origin:left center;width:24px}
h1{margin:26px 0 10px;font-size:clamp(25px,6vw,33px);font-weight:600;letter-spacing:-.02em}
.lede{margin:0 0 28px;color:var(--muted);font-size:14px;line-height:1.8}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);}
.start-card{padding:24px 22px;text-align:left}
.field-label{display:block;font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.04em;margin-bottom:8px}
.text-input{
  width:100%;height:46px;padding:0 14px;border:1px solid var(--line);border-radius:12px;
  background:var(--surface-2);outline:none;transition:border-color .18s,box-shadow .18s;
}
.text-input:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.text-input::placeholder{color:var(--faint)}
.mode-label{margin-top:22px}
.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.mode-btn{
  display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 4px;
  border:1px solid var(--line);border-radius:13px;background:var(--surface-2);
  font-size:12.5px;color:var(--muted);transition:.18s;
}
.mode-btn:hover{border-color:var(--brand);color:var(--brand-text)}
.mode-btn.active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-text);font-weight:600}
.mode-ico{font-size:17px;line-height:1.2}
.code-row{margin-top:18px}
.code-input{letter-spacing:.28em;text-transform:uppercase;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-weight:600}
.primary-btn{
  width:100%;height:48px;margin-top:22px;border-radius:13px;color:#fff;font-weight:600;letter-spacing:.03em;
  background:linear-gradient(100deg,var(--brand),#9a7bf5 60%,var(--accent));
  box-shadow:0 8px 22px rgba(124,107,242,.28);transition:transform .15s,filter .15s;
}
.primary-btn:hover{filter:brightness(1.06)}
.primary-btn:active{transform:translateY(1px)}
.primary-btn:disabled{opacity:.6;cursor:wait}
.form-err{min-height:18px;margin-top:8px;color:#e2506a;font-size:12.5px;text-align:center}
.landing-note{margin-top:20px;color:var(--faint);font-size:11.5px;line-height:1.7}

/* ---------- match preferences ---------- */
.pref-row{margin-top:18px;padding:14px 14px 12px;border:1px solid var(--line);border-radius:14px;background:var(--surface-2)}
.pref-line{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.pref-label{flex:none;width:52px;font-size:12px;font-weight:600;color:var(--muted)}
.pill-group{display:flex;gap:6px;flex:1}
.pill{
  flex:1;padding:7px 4px;border:1px solid var(--line);border-radius:9px;
  background:var(--surface);font-size:12.5px;color:var(--muted);transition:.18s;
}
.pill:hover:not(:disabled){border-color:var(--brand);color:var(--brand-text)}
.pill.active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-text);font-weight:600}
.pill:disabled{opacity:.4;cursor:not-allowed}
.pref-note{margin-top:2px;color:var(--faint);font-size:11px;line-height:1.65;text-align:left}

/* ---------- chat header ---------- */
.chat-head{
  display:flex;align-items:center;gap:12px;min-height:62px;padding:10px 16px;
  border-bottom:1px solid var(--line);background:var(--surface);flex:none;
}
.head-brand{display:flex;align-items:center;gap:6px;font-weight:600;font-size:16px;white-space:nowrap}
.head-room{display:flex;flex-direction:column;align-items:center;line-height:1.25;min-width:0;flex:1}
.room-code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:14px;font-weight:600;letter-spacing:.14em}
.presence{font-size:11px;color:var(--muted)}
.presence.off{color:#e2506a}
.head-actions{display:flex;gap:4px}
.icon-btn{padding:6px 9px;border-radius:9px;font-size:12px;color:var(--muted);white-space:nowrap}
.icon-btn:hover{background:var(--surface-2);color:var(--brand-text)}

/* ---------- messages ---------- */
.chat-body{flex:1;min-height:0;overflow-y:auto;padding:18px 16px 10px;scroll-behavior:smooth}
.msgs{display:flex;flex-direction:column;gap:12px}
.msg-row{display:flex;flex-direction:column;max-width:78%;animation:pop .24s ease-out}
.msg-row.mine{align-self:flex-end;align-items:flex-end}
.msg-row.theirs{align-self:flex-start;align-items:flex-start}
@keyframes pop{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.msg-meta{display:flex;gap:7px;align-items:center;margin:0 4px 4px;font-size:10.5px;color:var(--faint)}
.bubble{
  padding:10px 14px;border-radius:17px;font-size:14.5px;line-height:1.65;word-break:break-word;white-space:pre-wrap;
  box-shadow:var(--shadow-sm);
}
.theirs .bubble{background:var(--surface);border:1px solid var(--line);border-bottom-left-radius:6px}
.mine .bubble{background:linear-gradient(105deg,var(--brand),#9180f6);color:#fff;border-bottom-right-radius:6px}
.ai-badge{display:inline-block;font-size:10px;line-height:1;color:var(--brand-text);background:var(--brand-soft);border-radius:5px;padding:2px 5px;margin-left:4px;font-weight:600;letter-spacing:.3px}
.mine .ai-badge{color:#fff;background:var(--accent);font-weight:600}
.sys-msg{align-self:center;color:var(--faint);font-size:11.5px;padding:3px 10px;background:var(--surface-2);border-radius:20px;margin:2px 0}
.wait-card{
  margin:26px auto 0;max-width:360px;padding:26px 20px;text-align:center;background:var(--surface);
  border:1px dashed var(--line);border-radius:18px;
}
.wait-ico{font-size:24px;color:var(--brand)}
.wait-title{margin-top:8px;font-weight:600;font-size:15px}
.wait-desc{margin-top:6px;color:var(--muted);font-size:12.5px;line-height:1.7}
.wait-code{
  margin:16px auto 12px;padding:9px;border-radius:10px;background:var(--brand-soft);color:var(--brand-text);
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:20px;font-weight:600;letter-spacing:.24em;
}
.ghost-btn{padding:8px 16px;border:1px solid var(--line);border-radius:10px;font-size:12.5px;color:var(--muted)}
.ghost-btn:hover{border-color:var(--brand);color:var(--brand-text)}
.ghost-btn.full{width:100%;margin-top:10px}
.wait-stats{margin:2px 0 14px;color:var(--brand-text);font-size:12px}
.wait-stats.relaxed{color:var(--accent)}
.wait-actions{display:flex;justify-content:center;gap:8px}
.wait-actions .ghost-btn.danger{border-color:var(--accent);color:var(--accent)}
.typing{display:flex;align-items:center;gap:3px;margin:10px 4px;color:var(--muted);font-size:11.5px}
.typing span{width:5px;height:5px;border-radius:50%;background:var(--brand);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,60%,100%{opacity:.25}30%{opacity:1}}

/* ---------- AI panel ---------- */
.ai-panel{
  flex:none;padding:12px 16px 10px;background:var(--surface);border-top:1px solid var(--line);
}
.ai-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:9px}
.ai-title{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ai-spark{color:var(--brand);margin-right:3px}
.ai-hint{font-weight:400;font-size:11px;color:var(--faint);margin-left:6px}
.ai-actions{display:flex;gap:6px;flex:none}
.mini-btn{padding:5px 10px;border-radius:8px;background:var(--surface-2);font-size:11.5px;color:var(--muted)}
.mini-btn:hover{background:var(--brand-soft);color:var(--brand-text)}
.mini-btn:disabled{opacity:.5;cursor:wait}
.mini-btn.on{background:linear-gradient(100deg,var(--brand),#9a7bf5 60%,var(--accent));color:#fff;border-color:transparent;box-shadow:0 2px 10px rgba(124,92,255,.28)}
.mini-btn.on:hover{filter:brightness(1.05);color:#fff}
.ai-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.ai-card{
  text-align:left;padding:10px 11px;border:1px solid var(--line);border-left:3px solid var(--brand);
  border-radius:10px;background:var(--surface-2);font-size:12.5px;line-height:1.55;
  min-height:58px;transition:.16s;display:flex;flex-direction:column;justify-content:space-between;gap:5px;
}
.ai-card:hover{transform:translateY(-2px);border-color:var(--brand);box-shadow:var(--shadow-sm);background:var(--brand-soft)}
.ai-card .tone{font-size:10px;color:var(--brand-text);opacity:.85}
.ai-card .txt{color:var(--text)}
.ai-card.skeleton{background:var(--surface-2);color:var(--faint);border-left-color:var(--line);min-height:58px}
.ai-status{margin-top:7px;min-height:15px;font-size:11px;color:var(--faint)}

/* ---------- composer ---------- */
.composer{
  display:flex;align-items:flex-end;gap:9px;padding:10px 16px 6px;background:var(--surface);flex:none;
}
.composer textarea{
  flex:1;resize:none;max-height:110px;min-height:42px;padding:10px 13px;border:1px solid var(--line);
  border-radius:13px;background:var(--surface-2);outline:none;line-height:1.5;font-size:14px;
}
.composer textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.send-btn{
  height:42px;padding:0 20px;border-radius:13px;background:var(--brand);color:#fff;font-weight:600;font-size:13.5px;
  box-shadow:0 5px 16px rgba(124,107,242,.25);flex:none;
}
.send-btn:hover{filter:brightness(1.08)}
.send-btn:disabled{opacity:.45;cursor:default}
.composer-note{
  padding:0 16px calc(8px + env(safe-area-inset-bottom));background:var(--surface);
  color:var(--faint);font-size:10.5px;text-align:center;flex:none;
}

/* ---------- modal / toast ---------- */
.modal{position:absolute;inset:0;background:rgba(20,16,40,.45);display:flex;align-items:center;justify-content:center;padding:22px;z-index:30}
.modal-box{width:min(100%,340px);padding:22px;background:var(--surface);border-radius:18px;box-shadow:var(--shadow)}
.modal-title{font-size:16px;font-weight:600}
.modal-desc{margin:5px 0 16px;color:var(--muted);font-size:12.5px}
.reason-btn{display:block;width:100%;padding:11px 13px;margin-bottom:8px;text-align:left;border:1px solid var(--line);border-radius:11px;background:var(--surface-2);font-size:13px}
.reason-btn:hover{border-color:var(--brand);color:var(--brand-text)}
.toast{
  position:absolute;left:50%;bottom:118px;transform:translate(-50%,12px);z-index:40;
  padding:9px 16px;border-radius:11px;background:rgba(38,32,60,.93);color:#fff;font-size:12.5px;
  opacity:0;pointer-events:none;transition:.22s;max-width:84%;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 语音消息 / 一起听（v1.5） ---------- */
.voice-btn{
  flex:0 0 auto;width:42px;height:42px;border-radius:13px;background:var(--surface-2);
  color:var(--brand-text);font-size:19px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);transition:.18s;touch-action:none;user-select:none;-webkit-user-select:none
}
.voice-btn:hover{background:var(--brand-soft)}
.voice-btn.recording{background:var(--accent);color:#fff;border-color:transparent;transform:scale(1.06);box-shadow:0 0 0 5px rgba(255,125,149,.18)}
.voice-hint{
  padding:6px 16px;font-size:12.5px;color:var(--accent);background:var(--surface);
  border-top:1px solid var(--line);text-align:center;animation:pop .2s ease-out
}
.voice-hint.cancel{color:var(--muted);background:var(--surface-2)}
.voice-bubble{display:flex;align-items:center;gap:10px;min-width:152px;padding:9px 12px}
.voice-play{
  flex:0 0 auto;width:30px;height:30px;border-radius:50%;font-size:12px;
  background:rgba(124,107,242,.16);color:var(--brand-text);display:flex;align-items:center;justify-content:center
}
.voice-play:hover{background:rgba(124,107,242,.3)}
.voice-play.playing{background:var(--brand);color:#fff;animation:pulse 1s infinite}
.mine .voice-play{background:rgba(255,255,255,.22);color:#fff}
.mine .voice-play.playing{background:#fff;color:var(--brand-text)}
.voice-wave{display:flex;align-items:center;gap:2px;height:18px}
.voice-wave i{width:3px;border-radius:2px;background:currentColor;opacity:.55}
.voice-wave i:nth-child(1){height:7px}
.voice-wave i:nth-child(2){height:13px}
.voice-wave i:nth-child(3){height:18px}
.voice-wave i:nth-child(4){height:11px}
.voice-wave i:nth-child(5){height:6px}
.voice-play.playing + .voice-wave i{animation:wave .7s ease-in-out infinite alternate}
.voice-dur{font-size:12px;opacity:.8;white-space:nowrap}
.music-bubble{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.music-ico{font-size:17px}
.music-title{font-weight:600;font-size:13.5px}
.music-play{padding:4px 10px;border-radius:9px;font-size:12px;font-weight:600;background:rgba(124,107,242,.16);color:var(--brand-text)}
.mine .music-play{background:rgba(255,255,255,.22);color:#fff}
.music-play:hover{filter:brightness(1.1)}
.music-panel{background:var(--surface);border-top:1px solid var(--line);padding:10px 14px 11px;box-shadow:0 -6px 18px rgba(58,42,120,.05)}
.music-head{display:flex;align-items:center;gap:9px;font-size:13px;margin-bottom:8px}
.music-head b{font-size:13.5px}
.music-tip{color:var(--muted);font-size:11.5px;flex:1}
.music-close{font-size:20px;line-height:1;color:var(--muted);padding:0 4px}
.track-list{display:flex;gap:8px;overflow-x:auto;padding-bottom:2px;scrollbar-width:none}
.track-list::-webkit-scrollbar{display:none}
.track-item{
  flex:0 0 auto;display:flex;align-items:center;gap:7px;padding:7px 12px;border-radius:11px;
  background:var(--surface-2);border:1px solid transparent;font-size:12.5px;color:var(--text)
}
.track-item:hover{border-color:var(--brand)}
.track-item.active{border-color:var(--brand);background:var(--brand-soft);color:var(--brand-text)}
.track-item em{font-style:normal;font-size:11px;color:var(--accent)}
.track-ico{font-size:14px}
.music-foot{display:flex;align-items:center;gap:9px;margin-top:9px;flex-wrap:wrap}
.music-vol{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);flex:1;min-width:150px}
.music-vol input{flex:1;accent-color:var(--brand)}
.primary-ghost{background:var(--brand-soft);color:var(--brand-text);border-color:var(--brand)}
@keyframes wave{from{transform:scaleY(.5)}to{transform:scaleY(1.2)}}
@keyframes pulse{50%{transform:scale(1.08)}}

@media (max-width:640px){
  .chat-head{padding:8px 10px;min-height:56px}
  .head-brand span:last-child{display:none}
  .head-brand{width:26px}
  .icon-btn{padding:6px 7px;font-size:11.5px}
  .chat-body{padding:14px 12px 8px}
  .msg-row{max-width:85%}
  .ai-panel{padding:10px 12px 8px}
  .ai-hint{display:none}
  .ai-cards{display:flex;overflow-x:auto;gap:8px;scroll-snap-type:x mandatory;padding-bottom:2px;scrollbar-width:none}
  .ai-cards::-webkit-scrollbar{display:none}
  .ai-card{min-width:68%;scroll-snap-align:start;min-height:54px}
  .composer{padding:9px 12px 5px}
  .composer-note{padding:0 12px calc(7px + env(safe-area-inset-bottom))}
  .music-label{display:none}
  .music-tip{display:none}
  .music-panel{padding:9px 10px}
  .voice-btn{width:38px;height:38px;font-size:17px}
  .start-card{padding:20px 16px}
}