:root{
  --bg:#16171a; --surface:#1e2024; --surface-2:#25282e; --line:#32363d;
  --text:#e8eaed; --text-2:#9aa0a6; --text-3:#6b7280;
  --accent:#4c8dff; --accent-soft:rgba(76,141,255,.14);
  --green:#3ddc97; --red:#ff6b6b; --amber:#ffb84d; --radius:14px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:15px; line-height:1.6; -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important}
.app{max-width:560px;margin:0 auto;padding:20px 18px 40px;min-height:100%;display:flex;flex-direction:column}

.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:6px 2px 16px}
.brand{display:flex;align-items:center;gap:9px}
.brand-name{font-size:16px;font-weight:600;letter-spacing:.04em}
.dot{width:9px;height:9px;border-radius:50%;background:var(--text-3);flex:0 0 auto}
.dot.on{background:var(--green)}
.dot.warn{background:var(--amber)}
.room-badge{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 6px 5px 12px;font-size:13px}
.room-label{color:var(--text-3)}
.room-id{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:600;letter-spacing:.06em}
.room-count{font-size:11.5px;color:var(--text-2);background:var(--surface-2);border:1px solid var(--line);border-radius:999px;padding:1px 8px;white-space:nowrap}

.notice{
  border-radius:10px;padding:11px 14px;font-size:13px;margin-bottom:14px;
  background:rgba(255,184,77,.1);border:1px solid rgba(255,184,77,.3);color:var(--amber);
}
.notice.error{background:rgba(255,107,107,.1);border-color:rgba(255,107,107,.3);color:var(--red)}
.notice.ok{background:rgba(61,220,151,.1);border-color:rgba(61,220,151,.3);color:var(--green)}

.view{display:block}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px}
.card h1{font-size:19px;font-weight:600;margin:0 0 6px;letter-spacing:-.01em}
.sub{color:var(--text-2);font-size:13.5px;margin:0 0 22px}

/* ---------- 校验 / 进入 ---------- */
.gate{text-align:center;padding:34px 24px 26px}
.gate-icon{
  width:58px;height:58px;margin:0 auto 16px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;font-size:26px;
  background:var(--accent-soft);color:var(--accent);
}
.gate-icon.bad{background:rgba(255,107,107,.12);color:var(--red)}
.gate-icon.good{background:rgba(61,220,151,.13);color:var(--green)}
.gate .sub{margin-bottom:18px}
.gate-room{
  background:var(--surface-2);border:1px solid var(--line);border-radius:12px;
  padding:16px;margin-bottom:18px;
}
.gate-room-name{font-size:16px;font-weight:600;margin-bottom:6px}
.gate-room-code{font-size:13px;color:var(--text-2)}
.gate-room-code b{
  font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--accent);
  font-size:17px;letter-spacing:.1em;margin-left:6px;
}
.field{display:block;margin-bottom:16px;text-align:left}
.field-label{display:block;font-size:12.5px;color:var(--text-2);margin-bottom:7px}
input,select{
  width:100%;background:var(--surface-2);border:1px solid var(--line);color:var(--text);
  border-radius:10px;padding:11px 13px;font-size:15px;font-family:inherit;outline:none;
}
input:focus,select:focus{border-color:var(--accent);background:#2a2e35}
#roomInput{
  text-align:center;font-size:24px;letter-spacing:.3em;font-family:ui-monospace,Menlo,Consolas,monospace;
  font-weight:600;padding:12px;
}
#roomInput.err{border-color:var(--red);animation:shake .3s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}

.primary-btn{
  width:100%;background:var(--accent);color:#fff;border:0;border-radius:11px;
  padding:13px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit;margin-top:4px;
}
.primary-btn:hover{background:#3d7ef0}
.primary-btn:disabled{background:#3a3f47;opacity:.6;cursor:not-allowed}
.gate-hint{margin-top:16px;font-size:12.5px;color:var(--text-3);line-height:1.7}

/* ---------- 通话 ---------- */
.call-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:18px}
.call-head h1{margin:0}
.state-chip{font-size:12px;padding:4px 10px;border-radius:999px;background:var(--surface-2);color:var(--text-2);border:1px solid var(--line);white-space:nowrap}
.state-chip.ok{background:rgba(61,220,151,.12);color:var(--green);border-color:rgba(61,220,151,.3)}
.state-chip.bad{background:rgba(255,107,107,.12);color:var(--red);border-color:rgba(255,107,107,.3)}

.stage{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.participant{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.avatar{width:40px;height:40px;border-radius:50%;flex:0 0 auto;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;background:var(--accent-soft);color:var(--accent)}
.avatar.me{background:rgba(61,220,151,.14);color:var(--green)}
.p-body{flex:1;min-width:0}
.p-name{font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.meter{height:4px;background:#33383f;border-radius:3px;margin-top:7px;overflow:hidden}
.meter i{display:block;height:100%;width:0%;background:var(--green);border-radius:3px;transition:width .08s linear}
.kbps{font-size:11.5px;color:var(--text-3);margin-top:5px;line-height:1.5}
.kbps.ok{color:var(--green)}
.kbps.warn{color:var(--amber)}
.peer-list{display:flex;flex-direction:column;gap:10px}
.empty{text-align:center;color:var(--text-3);font-size:13px;padding:16px;border:1px dashed var(--line);border-radius:12px}

/* ============ 房间管理员 ============ */
.host-badge{display:inline-block;font-size:11px;padding:2px 8px;border-radius:999px;background:rgba(255,184,77,.14);color:var(--amber);border:1px solid rgba(255,184,77,.35);margin-left:7px;vertical-align:middle;font-weight:500}
.owner-mark{display:inline-block;font-size:11px;padding:1px 7px;border-radius:999px;background:rgba(255,184,77,.14);color:var(--amber);border:1px solid rgba(255,184,77,.35);margin-left:7px;vertical-align:middle;font-weight:500}

.host-panel{background:var(--surface-2);border:1px solid rgba(255,184,77,.3);border-radius:12px;padding:12px 14px;margin-bottom:10px}
.host-panel-head{display:flex;align-items:center;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.host-panel-head .host-badge{margin-left:0}
.host-panel-tip{font-size:12px;color:var(--text-3);line-height:1.5}
.host-rename{display:flex;gap:8px}
.host-rename input{flex:1;min-width:0;background:var(--surface);border:1px solid var(--line);color:var(--text);border-radius:9px;padding:9px 11px;font-family:inherit;font-size:13px}
.host-rename input:focus{outline:none;border-color:var(--accent)}
.host-rename-btn{background:var(--accent);color:#fff;border:none;border-radius:9px;padding:9px 16px;font-family:inherit;font-size:13px;cursor:pointer;white-space:nowrap}
.host-rename-btn:hover{filter:brightness(1.08)}
.host-rename-btn:disabled{opacity:.55;cursor:default}

.host-acts{display:flex;gap:6px;align-items:center;flex:0 0 auto}
.act-mini{font-family:inherit;font-size:11.5px;padding:5px 10px;border-radius:8px;border:1px solid var(--line);background:var(--surface);color:var(--text-2);cursor:pointer;white-space:nowrap}
.act-mini:hover{border-color:#454a52;color:var(--text)}
.act-mini.danger{color:var(--red);border-color:rgba(255,107,107,.32)}
.act-mini.danger:hover{background:rgba(255,107,107,.1)}

.play-hint{display:block;width:100%;margin-bottom:14px;padding:12px 14px;background:rgba(255,184,77,.12);border:1px solid rgba(255,184,77,.45);color:var(--amber);border-radius:10px;font-size:13.5px;cursor:pointer;font-family:inherit;text-align:left}
.play-hint:hover{background:rgba(255,184,77,.2)}

.controls{display:flex;gap:10px;margin-bottom:18px}
.ctrl{flex:1;display:flex;flex-direction:column;align-items:center;gap:5px;background:var(--surface-2);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:12px 6px;cursor:pointer;font-family:inherit;font-size:12.5px}
.ctrl:hover{border-color:#454a52}
.ctrl-icon{font-size:15px;line-height:1}
.ctrl.active{background:rgba(255,107,107,.12);border-color:rgba(255,107,107,.35);color:var(--red)}
.ctrl.danger{color:var(--red)}
.ctrl.unsupported{opacity:.62}

/* 音频输出路由提示条 */
.route-note{margin:-8px 0 18px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--text-3);font-size:11.5px;line-height:1.6;text-align:center}
.route-note.warn{border-color:rgba(255,184,77,.35);background:rgba(255,184,77,.08);color:#ffb84d}

/* 远端音频元素容器：视觉上不可见，但必须保持在 DOM 中
   （iOS Safari 对游离 audio 元素强制走扬声器） */
.audio-box{position:fixed;left:0;top:0;width:1px;height:1px;overflow:hidden;opacity:.001;pointer-events:none;z-index:-1}

/* ========== 在线聊天（方形对话方框） ==========
 * 设计：外框保持深色（与通话页统一），内部「消息区」与「输入框」用白底，
 *      在深色背景里更醒目、层次更清楚。消息文字相应调深以保证白底可读。
 */
.chat-panel{
  display:flex;flex-direction:column;
  aspect-ratio:1/1;              /* 正方形对话方框 */
  max-height:min(72vh,520px);
  background:var(--surface-2);border:1px solid var(--line);border-radius:12px;
  padding:12px;margin-bottom:18px;overflow:hidden;
}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:10px;border-bottom:1px solid var(--line);flex:0 0 auto}
.chat-title{font-size:13px;font-weight:600;color:var(--text)}
.chat-hint{font-size:11px;color:var(--text-3)}

/* 消息区：白底 */
.chat-list{
  flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;
  padding:11px 10px;display:flex;flex-direction:column;gap:9px;
  background:#fff;border-radius:9px;
}
.chat-list::-webkit-scrollbar{width:5px}
.chat-list::-webkit-scrollbar-thumb{background:#cfd4db;border-radius:3px}
.chat-list::-webkit-scrollbar-track{background:transparent}
.chat-empty{color:#6b7280;font-size:12.5px;text-align:center;padding:22px 10px}

.chat-msg{display:flex;flex-direction:column;gap:3px;max-width:84%;align-self:flex-start}
.chat-msg.mine{align-self:flex-end;align-items:flex-end}
.chat-msg-head{display:flex;align-items:center;gap:5px;font-size:10.5px;color:#6b7280;padding:0 2px}
.chat-msg-name{font-weight:500;color:#5a6270}
.chat-msg.mine .chat-msg-name{color:#2f6fd0}
/* 房主标签：白底上用实色，保证清晰 */
.chat-msg-head .host-badge{
  background:#ffeed0;color:#8a5600;border-color:#e8bf7a;margin-left:0;
}
.chat-bubble{
  background:#f1f3f6;border:1px solid #e3e6ea;border-radius:11px;
  padding:8px 11px;font-size:13.5px;line-height:1.55;color:#1f2430;
  white-space:pre-wrap;word-break:break-word;overflow-wrap:anywhere;
}
.chat-msg.mine .chat-bubble{background:#dce9ff;border-color:#b9d2ff;color:#16345c}
.chat-bubble img{display:block;max-width:100%;border-radius:8px;cursor:zoom-in}
.chat-time{font-size:10px;color:#6b7280;padding:0 2px}

/* 输入行：输入框与图片按钮白底，和发送按钮形成清晰分组 */
.chat-input-row{display:flex;gap:7px;align-items:center;padding-top:10px;border-top:1px solid var(--line);flex:0 0 auto}
.chat-input-row input{
  flex:1;min-width:0;background:#fff;border:1px solid #d7dbe1;color:#1f2430;
  border-radius:9px;padding:9px 11px;font-size:14px;font-family:inherit;outline:none;
}
.chat-input-row input::placeholder{color:#a3aab4}
.chat-input-row input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.chat-icon-btn{
  flex:0 0 auto;width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid #d7dbe1;color:#5a6270;
  border-radius:9px;cursor:pointer;font-family:inherit;
}
.chat-icon-btn:hover{border-color:#b6bcc6;color:#1f2430}
.chat-icon{font-size:15px;line-height:1}
.chat-send-btn{
  flex:0 0 auto;background:var(--accent);color:#fff;border:0;border-radius:9px;
  padding:0 16px;height:38px;font-family:inherit;font-size:13.5px;font-weight:600;cursor:pointer;
}
.chat-send-btn:hover{background:#3d7ef0}
.chat-send-btn:disabled{opacity:.5;cursor:default}

/* 图片查看大图遮罩 */
.chat-viewer{
  position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:9999;
  display:flex;align-items:center;justify-content:center;padding:20px;
}
.chat-viewer img{max-width:100%;max-height:100%;border-radius:10px;object-fit:contain}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;border-top:1px dashed var(--line);padding-top:16px;margin-top:2px}
.stat{display:flex;flex-direction:column;gap:3px;align-items:center}
.stat-label{font-size:11px;color:var(--text-3)}
.stat-value{font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}

.foot{margin-top:auto;padding-top:22px;text-align:center;font-size:11.5px;color:var(--text-3);line-height:1.6}
.toast{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);background:#2c3037;border:1px solid var(--line);color:var(--text);padding:10px 18px;border-radius:999px;font-size:13px;box-shadow:0 8px 24px rgba(0,0,0,.35)}

@media (max-width:420px){
  .card{padding:22px 18px}
  .stats{grid-template-columns:repeat(2,1fr);gap:12px}
  .room-badge{font-size:12px}
  .chat-panel{aspect-ratio:auto;height:min(62vh,430px);padding:10px}
  .chat-msg{max-width:88%}
  .chat-send-btn{padding:0 13px}
}