/* LT Chat — Telegram-like dark theme */
:root{
  --bg:#0e1621; --side:#17212b; --side2:#1c2733; --hover:#202b36;
  --head:#17212b; --line:#101921;
  --in:#182533; --out:#2b5278; --text:#e9edf0; --sub:#7d8b99; --accent:#3390ec;
  --accent2:#2e86e0; --danger:#e05555; --ok:#4fae4e;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif;
  font-size:14px}
.hidden{display:none!important}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:#2c3a47;border-radius:4px}

/* ---------- auth ---------- */
.auth-screen{height:100%;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(1200px 600px at 50% -10%,#1e3a5f 0%,#0e1621 60%)}
.auth-card{width:360px;max-width:92vw;background:var(--side);border-radius:14px;padding:26px 24px;
  box-shadow:0 20px 60px rgba(0,0,0,.55);border:1px solid #24313d}
.logo{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:18px}
.logo h1{font-size:22px;margin:0;letter-spacing:.5px;font-weight:600}
.tabs{display:flex;background:#101a24;border-radius:10px;padding:4px;margin-bottom:16px}
.tab{flex:1;padding:9px;border-radius:8px;color:var(--sub);font-size:14px;transition:.18s}
.tab.active{background:var(--side2);color:#fff}
.inp{width:100%;padding:12px 14px;margin-bottom:10px;background:#101a24;border:1px solid #24313d;
  border-radius:9px;color:var(--text);outline:none;font-size:14px}
.inp:focus{border-color:var(--accent)}
.inp.small{padding:8px 11px;margin:0;font-size:13px}
.inp.area{padding:12px;resize:vertical;min-height:96px;margin-bottom:12px}
.btn{padding:10px 16px;border-radius:9px;background:var(--side2);font-size:14px;color:var(--text);transition:.15s}
.btn:hover{filter:brightness(1.12)}
.btn.primary{width:100%;background:var(--accent);color:#fff;font-weight:500;margin-top:4px}
.btn.primary:hover{background:var(--accent2)}
.btn.small{padding:6px 12px;font-size:13px}
.btn.ghost{background:#233240}
.btn.danger{background:var(--danger);color:#fff}
.auth-msg{min-height:18px;font-size:13px;color:var(--danger);text-align:center;margin-top:8px}
.auth-tip{font-size:12px;color:var(--sub);text-align:center;margin-top:6px;line-height:1.6}

/* ---------- main ---------- */
.main-screen{height:100%;display:flex}
.sidebar{width:340px;min-width:340px;background:var(--side);border-right:1px solid var(--line);
  display:flex;flex-direction:column}
.side-head{display:flex;align-items:center;gap:8px;padding:10px 8px;border-bottom:1px solid #0f1922}
.side-search{flex:1}
.side-search input{width:100%;padding:8px 12px;border-radius:17px;background:#101a24;border:1px solid #24313d;
  color:var(--text);outline:none;font-size:13px}
.icon-btn{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;color:#a8b6c3;transition:.15s}
.icon-btn:hover{background:var(--hover);color:#fff}
.chat-list{flex:1;overflow-y:auto}
.chat-row{display:flex;gap:11px;padding:10px 12px;cursor:pointer;align-items:center;transition:.14s}
.chat-row:hover{background:var(--hover)}
.chat-row.active{background:#202b36}
.avatar{position:relative;width:48px;height:48px;min-width:48px;border-radius:50%;display:grid;place-items:center;
  font-weight:600;font-size:16px;color:#fff;background:linear-gradient(135deg,#3d7bb5,#2b5278)}
.avatar.big{width:40px;height:40px;min-width:40px;font-size:15px}
.chat-row-main{flex:1;min-width:0}
.chat-row-top{display:flex;justify-content:space-between;gap:8px;align-items:center}
.chat-row-name{font-weight:500;font-size:14.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-row-time{font-size:11.5px;color:var(--sub);white-space:nowrap}
.chat-row-bottom{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-top:3px}
.chat-row-last{font-size:12.5px;color:#8d9aa7;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge{background:var(--accent);color:#fff;font-size:11.5px;min-width:19px;height:19px;border-radius:10px;
  display:grid;place-items:center;padding:0 5px}
.side-empty{padding:30px 20px;color:var(--sub);font-size:13px;text-align:center;line-height:1.8}

.chat-pane{position:relative;flex:1;display:flex;flex-direction:column;min-width:0;
  background:
    radial-gradient(900px 500px at 80% -5%,rgba(43,82,120,.30),transparent 70%),
    radial-gradient(700px 400px at 5% 100%,rgba(43,82,120,.18),transparent 70%),
    var(--bg)}
.placeholder{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:var(--sub)}
.placeholder p{margin:8px 0 0;font-size:15px;color:#93a2b0}
.placeholder span{font-size:12px;color:#5a6b7a}

.chat-box{flex:1;display:flex;flex-direction:column;min-height:0}
.chat-head{display:flex;align-items:center;gap:11px;padding:8px 12px;background:var(--head);
  border-bottom:1px solid #0f1922;min-height:56px}
.chat-title-wrap{flex:1;min-width:0}
.chat-title{font-weight:600;font-size:15.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-sub{font-size:12px;color:var(--sub);margin-top:2px}
.msg-list{flex:1;overflow-y:auto;padding:14px 16px 6px;display:flex;flex-direction:column;gap:3px}
.only-mobile{display:none}

.msg-row{display:flex;gap:8px;margin-top:6px;max-width:100%}
.msg-row.out{justify-content:flex-end}
.msg-col{max-width:min(680px,78%)}
.msg-meta{display:flex;gap:6px;align-items:center;margin:0 0 3px 2px;font-size:12px;color:#9fb0bf}
.msg-meta-time{margin-left:auto}
.bubble{background:var(--in);padding:8px 11px;border-radius:9px;border-top-left-radius:3px;
  font-size:14.5px;line-height:1.45;word-break:break-word;white-space:pre-wrap;position:relative;
  box-shadow:0 1px 1px rgba(0,0,0,.18)}
.msg-row.out .bubble{background:var(--out);border-top-left-radius:9px;border-top-right-radius:3px}
.bubble.text a{color:#8fc0f0}
.bubble.media{padding:4px}
.bubble.media img,.bubble.media video{max-width:100%;border-radius:6px;display:block;max-height:420px}
.bubble.sticker{background:transparent;box-shadow:none;padding:0;font-size:64px;line-height:1}
.bubble.voice{display:flex;align-items:center;gap:10px;padding:9px 12px;min-width:170px}
.voice-play{width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.14);display:grid;place-items:center}
.voice-wave{flex:1;height:22px;display:flex;align-items:center;gap:2px}
.voice-wave i{display:block;width:2.5px;background:#7fb2e5;border-radius:2px}
.voice-dur{font-size:12px;color:#c7d5e2}
.sys-msg{text-align:center;font-size:12px;color:#8fa3b5;background:rgba(43,82,120,.32);
  border-radius:12px;padding:4px 12px;margin:8px auto;max-width:80%}

.composer{background:var(--head);border-top:1px solid #0f1922;padding:6px 8px 8px;position:relative}
.composer-row{display:flex;align-items:flex-end;gap:4px}
.msg-input{flex:1;background:#101a24;border:1px solid #24313d;border-radius:18px;padding:9px 14px;
  color:var(--text);outline:none;resize:none;max-height:120px;font-size:14.5px;line-height:1.4}
.msg-input:focus{border-color:#2f6f9f}
.send-btn{width:44px;height:40px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;
  transition:.15s;margin-left:2px}
.send-btn:hover{background:var(--accent2)}
.voice-bar{display:flex;align-items:center;gap:10px;padding:8px 10px;background:#1a2532;border-radius:10px;margin-top:6px}
.rec-dot{width:11px;height:11px;border-radius:50%;background:#e05555;animation:blink 1s infinite}
@keyframes blink{50%{opacity:.35}}
#voiceTime{font-variant-numeric:tabular-nums;color:#c7d5e2}

.emoji-panel{position:absolute;left:8px;right:8px;bottom:56px;background:#1a2532;border-radius:12px;
  padding:10px;max-height:280px;overflow-y:auto;box-shadow:0 -8px 30px rgba(0,0,0,.5);z-index:5}
.emoji-grid{display:flex;flex-wrap:wrap;gap:4px}
.emoji-item{width:38px;height:38px;border-radius:8px;display:grid;place-items:center;font-size:20px}
.emoji-item:hover{background:#243240}
.emoji-item.sticker{font-size:30px}
.emoji-sec{font-size:12px;color:var(--sub);margin:8px 2px 6px}

/* ---------- dialog ---------- */
.dialog-wrap{position:fixed;inset:0;background:rgba(0,0,0,.55);display:grid;place-items:center;z-index:50}
.dialog{width:400px;max-width:92vw;background:var(--side);border-radius:12px;overflow:hidden;
  border:1px solid #24313d;box-shadow:0 24px 70px rgba(0,0,0,.6)}
.dialog-head{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;
  border-bottom:1px solid #0f1922;font-weight:600}
.dialog-body{padding:16px;color:#cfdae4;font-size:14px;line-height:1.7}
.dialog-actions{display:flex;justify-content:flex-end;gap:8px;padding:0 16px 16px}

/* ---------- admin ---------- */
.admin-screen{position:fixed;inset:0;background:var(--bg);z-index:40;display:flex;flex-direction:column}
.admin-head{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--head);
  border-bottom:1px solid #0f1922}
.admin-head h2{margin:0;font-size:16px}
.admin-who{margin-left:auto;font-size:12.5px;color:var(--sub)}
.admin-stats{display:flex;gap:10px;padding:12px 14px;overflow-x:auto;background:#131d28}
.stat{background:#1b2735;border-radius:10px;padding:10px 16px;min-width:88px;border:1px solid #223141}
.stat b{display:block;font-size:20px;color:#fff}
.stat span{font-size:12px;color:var(--sub)}
.admin-tabs{display:flex;gap:4px;padding:10px 14px 0}
.admin-tabs .tab{flex:0 0 auto;padding:8px 16px}
.admin-body{flex:1;overflow-y:auto;padding:12px 14px}
.admin-pane{display:block}
.admin-toolbar{display:flex;gap:8px;margin-bottom:10px}
.admin-toolbar .btn.small{white-space:nowrap;flex:0 0 auto;padding:8px 14px}
.admin-list{display:flex;flex-direction:column;gap:8px}
.acard{background:#1a2532;border:1px solid #223141;border-radius:11px;padding:11px 13px}
.acard-top{display:flex;align-items:center;gap:10px}
.acard-name{font-weight:600}
.acard-tag{font-size:11px;padding:1px 7px;border-radius:8px;background:#2b5278;color:#bcdcf5}
.acard-tag.banned{background:#4a2020;color:#f0b4b4}
.acard-tag.admin{background:#5a4620;color:#f5dca8}
.acard-sub{font-size:12px;color:var(--sub);margin-top:4px;line-height:1.6;word-break:break-all}
.acard-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}
.acard-actions .btn{padding:5px 11px;font-size:12.5px}
.lbl{display:block;font-size:12.5px;color:var(--sub);margin:14px 0 6px}
.kv-line{display:flex;gap:10px;font-size:13px;padding:7px 0;border-bottom:1px solid #1c2733}
.kv-line span{color:var(--sub);min-width:64px}
code{color:#8fc0f0;word-break:break-all}

.toast{position:fixed;left:50%;bottom:70px;transform:translateX(-50%);background:#243240;
  color:#e9edf0;padding:9px 16px;border-radius:20px;font-size:13px;z-index:99;
  box-shadow:0 8px 24px rgba(0,0,0,.5)}

/* ---------- responsive ---------- */
@media (max-width:820px){
  .sidebar{width:100%;min-width:0;border-right:none}
  .chat-pane{position:fixed;inset:0;z-index:20;transform:translateX(100%);transition:transform .22s ease}
  .chat-pane.open{transform:translateX(0)}
  .only-mobile{display:grid}
  .msg-col{max-width:86%}
}

/* ---------- 管理员标识 / 右上角管理入口 ---------- */
.admin-entry{display:flex;align-items:center;gap:3px;padding:5px 9px;border-radius:11px;
  background:rgba(90,70,32,.55);border:1px solid #7a5c26;color:#f0d9a6;font-size:11.5px;
  white-space:nowrap;transition:.15s;flex:0 0 auto}
.admin-entry:hover{background:rgba(120,92,38,.7)}
.admin-entry .shield{font-size:12px;line-height:1}
.admin-entry.off{background:#1d2733;border-color:#2b3947;color:#8595a4}
.ava-badge{position:absolute;top:-4px;right:-9px;background:#5a4620;color:#f7e2b2;
  font-size:9px;line-height:1;padding:2px 4px;border-radius:5px;border:1px solid #8a6a2b;
  font-weight:600;letter-spacing:.5px;white-space:nowrap;box-shadow:0 1px 3px rgba(0,0,0,.4)}
.tag-admin{display:inline-block;margin-left:4px;padding:1px 5px;border-radius:5px;
  background:rgba(122,92,38,.55);color:#f7e2b2;font-size:10px;font-weight:600;vertical-align:middle}

/* 右上角管理入口：所有用户可见 */
.admin-entry{display:flex;align-items:center;gap:4px;height:32px;padding:0 10px;border-radius:16px;
  background:#1e3348;color:#9ecbff;font-size:12px;border:1px solid #2b4a68;transition:.15s;flex:0 0 auto}
.admin-entry:hover{background:#274661;color:#fff}
.admin-entry span{white-space:nowrap}
@media (max-width:400px){.admin-entry span{display:none} .admin-entry{padding:0 9px}}
.drop-hint{position:absolute;inset:0;display:grid;place-items:center;background:rgba(23,33,43,.86);
  border:2px dashed #3390ec;color:#9ecbff;font-size:15px;z-index:30;pointer-events:none}

/* ---------- AI 助手 ---------- */
.ai-line{display:flex;align-items:center;gap:8px;font-size:13px;padding:5px 0;border-bottom:1px dashed #223141}
.ai-line .dot{width:8px;height:8px;border-radius:50%;background:#556}
.ai-line .dot.ok{background:#4fae4e}
.ai-line .dot.bad{background:#e05555}
.ai-sec{border-top:1px solid #223141;padding-top:10px;margin-top:12px}
.ai-sec-title{font-weight:600;margin-bottom:8px;font-size:13.5px}
.dialog-body{max-height:66vh;overflow-y:auto}
select.inp{appearance:none;-webkit-appearance:none;background:#101a24}