:root{
  --bg:#f4f5fb;
  --card:#ffffff;
  --border:#e7e8f2;
  --text:#1f2333;
  --muted:#7a7f98;
  --primary:#4f46e5;
  --primary-dark:#4338ca;
  --danger:#e11d48;
  --ai-bg:#f0f0ff;
  --user-bg:#4f46e5;
  --radius:14px;
  --shadow:0 6px 24px rgba(31,35,51,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Segoe UI","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.55;
}
.topbar{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  padding:14px 22px;background:linear-gradient(135deg,#4f46e5,#7c3aed);
  color:#fff;box-shadow:var(--shadow);
}
.brand{display:flex;align-items:center;gap:12px;flex:1;min-width:220px}
.logo{font-size:34px}
.brand h1{font-size:20px;margin:0}
.brand p{font-size:12px;margin:2px 0 0;opacity:.85}
.model-switch{display:flex;flex-direction:column;gap:4px}
.model-switch label{font-size:12px;opacity:.9}
.model-row{display:flex;gap:8px}
.model-row select{
  padding:8px 10px;border:none;border-radius:9px;background:rgba(255,255,255,.95);
  color:var(--text);font-size:13px;max-width:220px;
}
.top-actions{display:flex;gap:8px}

.layout{display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:18px;padding:18px;max-width:1280px;margin:0 auto}
.col{display:flex;flex-direction:column;gap:18px;min-width:0}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.card h2{font-size:16px;margin:0 0 12px;display:flex;align-items:center;gap:8px}
.tag{font-size:11px;background:#eef2ff;color:#4f46e5;border-radius:20px;padding:2px 9px;font-weight:500}

.btn{
  border:1px solid transparent;border-radius:10px;padding:8px 14px;font-size:13px;
  cursor:pointer;transition:.15s;background:#eef0f7;color:var(--text);white-space:nowrap;
}
.btn:hover{filter:brightness(.96)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark)}
.btn.danger{background:var(--danger);color:#fff}
.btn.ghost{background:#eef0f7;color:var(--text);border-color:var(--border)}
.btn.big{padding:12px 20px;font-size:15px;font-weight:600}
.btn.small{padding:5px 10px;font-size:12px}
.btn.active{background:#f59e0b;color:#fff}
.btn.recording{background:var(--danger);color:#fff;animation:pulse 1.2s infinite}

.rec-mode{display:flex;gap:18px;margin-bottom:12px;font-size:14px}
.rec-mode label{display:flex;align-items:center;gap:6px;cursor:pointer}
.rec-controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rec-timer{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--primary)}
.rec-status{font-size:13px;color:var(--muted);margin-top:10px;min-height:20px}
.rec-status.on{color:var(--danger)}
.rec-actions{margin-top:8px}
.hint{font-size:12px;color:var(--muted);margin-top:8px}

.transcript-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.transcript-controls .lang{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:6px}
.transcript-controls select{padding:6px 8px;border:1px solid var(--border);border-radius:8px}
.transcript-box{
  min-height:140px;max-height:300px;overflow-y:auto;border:1px solid var(--border);
  border-radius:10px;padding:10px 12px;font-size:13px;background:#fafbff;white-space:pre-wrap;
}
.transcript-box:empty::before{content:attr(placeholder);color:#b7bacb}
.transcript-box .interim{color:#9aa0b5}
.checkbox{display:flex;align-items:center;gap:8px;font-size:13px;margin-top:10px;cursor:pointer}

.chat-card{display:flex;flex-direction:column;height:calc(100vh - 130px);min-height:480px}
.chat-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.chat-header h2{margin:0}
.chat-box{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:12px;padding:6px 2px}
.msg{max-width:88%}
.user-msg{align-self:flex-end}
.ai-msg{align-self:flex-start}
.system-msg{align-self:center;background:#fff7ed;color:#92400e;border:1px solid #fed7aa;border-radius:10px;padding:8px 12px;font-size:13px;max-width:100%}
.msg-bubble{padding:10px 13px;border-radius:14px;font-size:14px;word-wrap:break-word}
.user-msg .msg-bubble{background:var(--user-bg);color:#fff;border-bottom-right-radius:4px}
.ai-msg .msg-bubble{background:var(--ai-bg);border:1px solid #e0e2ff;border-bottom-left-radius:4px}
.msg-meta{font-size:11px;color:var(--muted);margin:0 2px 4px}
.msg-bubble p{margin:6px 0}
.msg-bubble p:first-child{margin-top:0}
.msg-bubble p:last-child{margin-bottom:0}
.msg-bubble ul,.msg-bubble ol{margin:6px 0;padding-left:22px}
.msg-bubble h1,.msg-bubble h2,.msg-bubble h3,.msg-bubble h4{margin:10px 0 4px;font-size:15px}
.msg-bubble pre{background:#1e1e2e;color:#d9e0ee;border-radius:8px;padding:10px;overflow-x:auto;font-size:12.5px}
.msg-bubble code{font-family:Consolas,"Courier New",monospace;background:rgba(127,127,160,.15);border-radius:4px;padding:1px 5px;font-size:12.5px}
.msg-bubble pre code{background:transparent;padding:0}
.msg-bubble a{color:var(--primary)}

.chat-input-area{border-top:1px solid var(--border);padding-top:10px;margin-top:6px}
.input-row textarea{
  width:100%;border:1px solid var(--border);border-radius:10px;padding:10px 12px;
  font-size:14px;font-family:inherit;resize:vertical;min-height:48px;background:#fafbff;
}
.input-btns{display:flex;gap:8px;margin-top:8px;justify-content:flex-end;flex-wrap:wrap}

.modal{position:fixed;inset:0;background:rgba(20,22,40,.5);display:flex;align-items:center;justify-content:center;z-index:50;padding:20px}
.modal.hidden{display:none}
.modal-dialog{background:#fff;border-radius:16px;width:min(720px,100%);max-height:90vh;display:flex;flex-direction:column;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}
.modal-header h3{margin:0;font-size:16px}
.modal-body{padding:16px 20px;overflow-y:auto}
.modal-footer{padding:14px 20px;border-top:1px solid var(--border);display:flex;justify-content:flex-end}
.settings-section{margin-bottom:20px}
.settings-section h4{font-size:14px;margin:0 0 10px;color:var(--text)}
.form-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:10px}
.form-grid label{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:4px}
input,select,textarea{font-family:inherit}
input[type=text],input[type=password],input:not([type]),select{
  padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:13px;background:#fafbff;width:100%;
}
#systemPrompt{width:100%;border:1px solid var(--border);border-radius:8px;padding:10px;font-size:13px}
.preset-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px;align-items:center}
.preset-row select{flex:1;min-width:160px}
.provider-item{border:1px solid var(--border);border-radius:10px;padding:10px;margin-bottom:10px;background:#fafbff}
.p-row{display:flex;gap:8px;margin-bottom:8px;align-items:center}
.p-row .p-name{flex:1.2}
.p-row .p-base{flex:2}
.p-row .p-key{flex:1.5}
.p-row .p-type{flex:.8}
.p-models{width:100%}

@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}
@media (max-width:920px){
  .layout{grid-template-columns:1fr}
  .chat-card{height:auto;min-height:480px}
  .form-grid{grid-template-columns:1fr}
}