/* ==========================================================================
   Ruseh 睿舍 · AI Assistant
   主色系：电光蓝 #3173EE + 亮青 #3173EE
   两套主题（同一组主色，底色不同）：深色（默认）/ 浅色
   ========================================================================== */
:root{
  /* 底色 · 中性墨黑（同一套主色，去掉蓝调底） */
  --bg:#0B0D12; --sidebar:#0E1016; --panel:#12151C; --panel-2:#161A22; --panel-3:#1B2029;
  --hover:#191D26; --active:#16233A; --input:#14171E; --input-2:#1A1E27;
  --text:#E9ECF2; --muted:#9BA3B0; --dim:#6E7686;
  --border:#22262F; --border-2:#1A1E26;
  /* 单一主色 */
  --accent:#4A86F7; --accent-2:#4A86F7; --accent-d:#3173EE; --accent-3:#3173EE;
  --cyan:#4A86F7;
  --accent-soft:rgba(74,134,247,.12); --accent-line:rgba(74,134,247,.26);
  --accent-ring:rgba(74,134,247,.34);
  --bubble-user:linear-gradient(135deg,#3173EE,#4A86F7);
  --bubble-ai:rgba(74,134,247,.06); --bubble-ai-line:rgba(74,134,247,.14);
  --code-bg:#0F1218; --code-head:#151922;
  --tk-k:#7FB0FF; --tk-s:#6FCFA5; --tk-c:#6E7686; --tk-n:#E5B36A; --tk-f:#4A86F7;
  --scroll:#2A2F3A; --scroll-h:#3A4150;
  --glow-1:rgba(49,115,238,.10); --glow-2:rgba(49,115,238,.08);
  --overlay:rgba(4,6,10,.62); --mask:rgba(11,13,18,.86);
  --shadow:0 18px 50px rgba(0,0,0,.5);
  --logo-glow:drop-shadow(0 4px 14px rgba(74,134,247,.35));
  /* 状态色 */
  --ok:#31C46A; --warn:#E5A13A; --err:#E5484D;
  --radius:12px;
}
html[data-theme="light"]{
  /* 底色 · 纯白 + 极浅灰（参考图方案） */
  --bg:#FFFFFF; --sidebar:#FFFFFF; --panel:#FFFFFF; --panel-2:#F9F9F9; --panel-3:#F3F3F3;
  --hover:#F5F5F5; --active:#EAF4FE; --input:#F9F9F9; --input-2:#F3F3F3;
  --text:#0E1524; --muted:#5C6675; --dim:#8A93A3;
  --border:#EDEDED; --border-2:#F4F4F4;
  /* 单一主色 */
  --accent:#3173EE; --accent-2:#3173EE; --accent-d:#2560D8; --accent-3:#2560D8;
  --cyan:#3173EE;
  --accent-soft:rgba(49,115,238,.08); --accent-line:rgba(49,115,238,.22);
  --accent-ring:rgba(49,115,238,.30);
  --bubble-user:linear-gradient(135deg,#3173EE,#3C7BF0);
  --bubble-ai:#F7F8FA; --bubble-ai-line:#EDEDED;
  --code-bg:#F7F8FA; --code-head:#F0F2F5;
  --tk-k:#1B62D6; --tk-s:#0B7A55; --tk-c:#8395AF; --tk-n:#A2560B; --tk-f:#3173EE;
  --scroll:#DDDDDD; --scroll-h:#C4C4C4;
  --glow-1:rgba(49,115,238,.045); --glow-2:rgba(49,115,238,.045);
  --overlay:rgba(14,21,36,.40); --mask:rgba(255,255,255,.90);
  --shadow:0 8px 28px rgba(16,24,40,.08);
  --logo-glow:drop-shadow(0 4px 10px rgba(49,115,238,.20));
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0; color:var(--text);
  background-color:var(--bg);
  background-image:
    radial-gradient(1100px 620px at 4% -10%, var(--glow-1), transparent 62%),
    radial-gradient(900px 560px at 104% 0%, var(--glow-2), transparent 60%);
  background-attachment:fixed;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:15px; line-height:1.6; -webkit-font-smoothing:antialiased;
}
::selection{background:rgba(49,115,238,.20)}
.hidden{display:none !important}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:14px;color:var(--text);background:transparent;border:none;outline:none}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-thumb{background:var(--scroll);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:var(--scroll-h)}
::-webkit-scrollbar-track{background:transparent}

/* ---------------- login ---------------- */
.login-wrap{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(1100px 620px at 50% -12%, var(--glow-2), transparent 62%), radial-gradient(820px 560px at 96% 106%, var(--glow-1), transparent 60%), var(--bg);z-index:100;padding:20px}
.login-card{position:relative;width:100%;max-width:380px;background:var(--panel);border:1px solid var(--border);border-radius:20px;padding:34px 28px;text-align:center;box-shadow:var(--shadow)}
.login-theme{position:absolute;top:10px;right:10px}
.login-logo{width:56px;height:56px;margin:0 auto 12px;display:block;object-fit:contain;filter:var(--logo-glow)}
.brand-word{font-size:12.5px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase;margin-bottom:14px}
.brand-word b{color:var(--accent-2);font-weight:600;letter-spacing:.06em;margin-left:4px}
.login-card h1{font-size:21px;margin:0 0 6px;font-weight:600}
.login-sub{margin:0 0 20px;color:var(--muted);font-size:13px}
.login-card input{width:100%;background:var(--input);border-radius:12px;padding:13px 15px;font-size:14px;border:1px solid var(--border);transition:.15s}
.login-card input:focus{border-color:var(--accent-ring);box-shadow:0 0 0 3px var(--accent-soft)}
.btn-primary{width:100%;margin-top:14px;background:var(--accent);color:#fff;font-weight:600;border-radius:12px;padding:13px;font-size:14px;transition:.15s;box-shadow:0 4px 14px rgba(49,115,238,.22)}
.btn-primary:hover{background:var(--accent-d)}
.btn-primary.sm{width:auto;padding:9px 16px;margin:0;font-size:13px;border-radius:10px;box-shadow:none}
.btn-ghost{padding:9px 14px;border-radius:10px;border:1px solid var(--border);color:var(--text);font-size:13px;background:var(--input)}
.btn-ghost.sm{padding:7px 12px;font-size:12.5px}
.btn-ghost:hover{background:var(--input-2);border-color:var(--accent-line);color:var(--accent-2)}
.login-err{margin-top:12px;font-size:13px;color:var(--err);min-height:18px}

/* ---------------- layout ---------------- */
.app{display:flex;height:100dvh;overflow:hidden}
.sidebar{width:264px;flex:0 0 264px;background:var(--sidebar);display:flex;flex-direction:column;border-right:1px solid var(--border)}
.sb-brand{display:flex;align-items:center;gap:9px;padding:14px 14px 6px}
.sb-brand img{width:26px;height:26px;object-fit:contain;flex:0 0 auto;filter:var(--logo-glow)}
.sb-brand-name{font-size:13px;font-weight:600;letter-spacing:.02em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sb-brand-name b{color:var(--accent-2);font-weight:600;margin-left:3px}
.sb-top{padding:6px 10px 10px;display:flex;gap:8px}
.btn-new{flex:1;display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--text);border:1px solid var(--border);background:var(--panel-2);transition:.15s}
.btn-new:hover{background:var(--hover);border-color:var(--accent-line);color:var(--accent-2)}
.sb-search{margin:0 10px 8px;display:flex;align-items:center;gap:8px;background:var(--input);border:1px solid var(--border);border-radius:10px;padding:7px 10px;color:var(--muted)}
.sb-search input{flex:1;font-size:13.5px}
.chat-list{flex:1;overflow-y:auto;padding:0 8px 8px}
.chat-group{font-size:11.5px;color:var(--dim);padding:10px 8px 5px;letter-spacing:.02em}
.chat-item{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:9px;font-size:13.5px;color:var(--text);cursor:pointer;position:relative;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:.12s}
.chat-item span{flex:1;overflow:hidden;text-overflow:ellipsis}
.chat-item:hover{background:var(--hover)}
.chat-item.active{background:var(--active)}
.chat-item.active::before{content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:0 3px 3px 0;background:linear-gradient(180deg,var(--accent-2),var(--accent))}
.chat-item .del{opacity:0;flex:0 0 auto;color:var(--dim);padding:2px;border-radius:5px}
.chat-item:hover .del{opacity:1}
.chat-item .del:hover{color:var(--err)}
.sb-bottom{padding:10px;border-top:1px solid var(--border-2);margin-top:auto}
.sb-item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 10px;border-radius:9px;font-size:13.5px;color:var(--text);text-align:left}
.sb-item:hover{background:var(--hover);color:var(--accent-2)}
.scrim{display:none}

.main{flex:1;display:flex;flex-direction:column;min-width:0;overflow:hidden;position:relative}
.topbar{height:52px;flex:0 0 52px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;padding:0 12px;border-bottom:1px solid var(--border-2);background:var(--bg);z-index:5}
.topbar>#openSide{grid-column:1;grid-row:1;justify-self:start}
.topbar>.model-wrap{grid-column:2;grid-row:1;justify-self:center}
.topbar>.top-right{grid-column:3;grid-row:1;justify-self:end}
.icon-btn{padding:7px;border-radius:8px;color:var(--muted);display:flex;align-items:center}
.icon-btn:hover{background:var(--hover);color:var(--accent-2)}
.top-logo{width:22px;height:22px;object-fit:contain;flex:0 0 auto;filter:var(--logo-glow)}
.theme-btn svg{display:block}
.theme-btn .ic-moon{display:none}
html[data-theme="light"] .theme-btn .ic-sun{display:none}
html[data-theme="light"] .theme-btn .ic-moon{display:block}
.model-wrap{flex:1;display:flex;justify-content:center;align-items:center;gap:8px}
.model-sel{appearance:none;background:transparent;border:none;color:var(--text);font-size:15px;font-weight:600;padding:6px 26px 6px 10px;border-radius:9px;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237F90AE' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center}
.model-sel:hover{background-color:var(--hover)}
.model-sel option{background:var(--panel);color:var(--text);font-weight:400}
.top-title{font-size:15px;font-weight:600;letter-spacing:.02em}

/* 输入框下方的模型选择器 */
.model-bar{max-width:768px;margin:9px auto 0;display:flex;align-items:center;gap:10px;padding:0 2px}
.model-pick{position:relative;flex:0 0 auto}
.model-pill{display:inline-flex;align-items:center;gap:7px;padding:6px 11px;border-radius:20px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:12.5px;font-weight:500;transition:.15s;max-width:60vw}
.model-pill:hover{background:var(--hover);border-color:var(--accent-line);color:var(--accent-2)}
.model-pill span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.model-pill .chev{color:var(--dim);flex:0 0 auto;transition:transform .18s}
.model-pill.open .chev{transform:rotate(180deg)}
.model-menu{position:absolute;left:0;bottom:calc(100% + 8px);min-width:250px;max-width:min(88vw,380px);max-height:300px;overflow-y:auto;background:var(--panel);border:1px solid var(--border);border-radius:13px;box-shadow:var(--shadow);padding:6px;z-index:30}
.model-item{display:flex;align-items:center;gap:8px;width:100%;padding:9px 10px;border-radius:9px;font-size:13.5px;text-align:left;color:var(--text)}
.model-item:hover{background:var(--hover)}
.model-item.active{background:var(--accent-soft);color:var(--accent-2)}
.model-item .m-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.model-item .m-ch{font-size:11px;color:var(--dim);background:var(--panel-2);border:1px solid var(--border);padding:2px 7px;border-radius:20px;white-space:nowrap}
.model-item .m-ck{color:var(--accent-2);font-size:13px;flex:0 0 auto}
.model-hint{font-size:11.5px;color:var(--dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
@media (max-width:560px){.model-hint{display:none}}
/* 联网开关 */
.web-pill{flex:0 0 auto;cursor:pointer}
.web-pill.active{background:linear-gradient(135deg,var(--accent),var(--accent-d));border-color:transparent;color:#fff;box-shadow:0 6px 18px rgba(49,115,238,.34)}
.web-pill.active:hover{color:#fff;filter:brightness(1.08)}
.web-pill.active span{opacity:1}
/* 回车键行为切换 */
.enter-pill{flex:0 0 auto;cursor:pointer}
.enter-pill.active{background:var(--accent-soft);border-color:var(--accent-line);color:var(--accent-2)}
.enter-pill.active:hover{background:var(--accent-soft);color:var(--accent-2)}
@media (max-width:560px){
  .model-bar{flex-wrap:wrap;gap:8px}
  .model-pill{max-width:46vw;font-size:12px;padding:6px 10px}
}
.web-note{display:inline-flex;align-items:center;gap:7px;font-size:12px;color:var(--accent-2);background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:9px;padding:3px 10px;margin-bottom:9px}
.web-note.done{color:var(--muted);background:var(--panel-2);border-color:var(--border)}
.wn-dot{width:6px;height:6px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 8px var(--accent-ring);display:inline-block;animation:wnp 1s infinite ease-in-out}
@keyframes wnp{0%,100%{opacity:.35;transform:scale(.8)}50%{opacity:1;transform:scale(1.15)}}
.chk{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--text);cursor:pointer}
.chk input{width:auto}
/* 渠道管理 */
.chan-list{display:flex;flex-direction:column;gap:9px}
.chan-row{background:var(--panel-2);border:1px solid var(--border);border-radius:11px;padding:12px 14px;display:flex;flex-direction:column;gap:8px}
.chan-row.off{opacity:.5}
.chan-top{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.chan-name{font-size:14px;font-weight:500}
.chan-tag{font-size:11.5px;color:var(--dim);background:var(--panel-3);padding:2px 8px;border-radius:20px}
.chan-models{display:flex;gap:6px;flex-wrap:wrap}
.chip-m{font-size:11.5px;color:var(--accent-2);background:var(--accent-soft);border:1px solid var(--accent-line);padding:2px 8px;border-radius:20px;font-family:ui-monospace,Menlo,Consolas,monospace}
.field textarea{width:100%;background:var(--input);border:1px solid var(--border);border-radius:10px;padding:11px 13px;font-size:13.5px;resize:vertical;line-height:1.5}
.top-right{display:flex;align-items:center;gap:6px}
.net-dot{width:8px;height:8px;border-radius:50%;background:var(--scroll);transition:.3s}
.net-dot.on{background:var(--accent-2);box-shadow:0 0 8px var(--accent-ring)}
.net-dot.busy{background:var(--warn)}

.scroll{flex:1;overflow-y:auto;overflow-x:hidden;position:relative;overscroll-behavior:contain}
.scroll-pad{height:120px}
.msgs{max-width:768px;margin:0 auto;padding:24px 20px 0}
.scroll-pad+.msgs{display:none}

.empty{max-width:768px;margin:0 auto;padding:16vh 20px 0;text-align:center}
.empty h2{font-size:30px;font-weight:600;margin:16px 0 8px;letter-spacing:-.01em}
.empty-brand{margin:0 0 24px;font-size:12.5px;color:var(--muted);letter-spacing:.14em;text-transform:uppercase}
/* 浅色底：直接用品牌深蓝版 R（透明底），不再套深色方块 */
html[data-theme="light"] .login-logo,
html[data-theme="light"] .empty-logo,
html[data-theme="light"] .sb-brand img,
html[data-theme="light"] .top-logo{filter:var(--logo-glow)}
.empty-brand b{color:var(--accent-2);font-weight:600;letter-spacing:.06em;margin-left:4px}
.empty-logo{width:56px;height:56px;margin:0 auto;display:block;object-fit:contain;filter:var(--logo-glow)}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:8px}
.chip{padding:10px 15px;border:1px solid var(--border);border-radius:20px;font-size:13.5px;color:var(--text);transition:.15s;background:var(--panel)}
.chip:hover{background:var(--hover);border-color:var(--accent-line);color:var(--accent-2)}

.msg{margin-bottom:26px;display:flex;gap:14px}
.msg.user{justify-content:flex-end}
.bubble-user{background:var(--bubble-user);color:#fff;padding:11px 17px;border-radius:20px;max-width:78%;white-space:pre-wrap;word-break:break-word;box-shadow:0 8px 22px rgba(49,115,238,.22)}
.av{width:27px;height:27px;flex:0 0 27px;margin-top:1px;display:flex;align-items:flex-start;justify-content:center;color:var(--muted)}
.av .brain-ic{width:16px;height:16px;margin-top:3px}
.msg-body{flex:1;min-width:0;word-break:break-word;overflow-wrap:anywhere}
.msg-actions{display:flex;gap:2px;margin-top:6px;opacity:0;transition:.15s}
.msg.user .msg-actions.user-acts{justify-content:flex-end;margin-top:4px}
.u-col{display:flex;flex-direction:column;align-items:flex-end;max-width:78%;min-width:0}
.u-col .bubble-user{max-width:100%}
.msg:hover .msg-actions{opacity:1}
.act{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;color:var(--dim);transition:.15s}
.act svg{display:block}
.act.ok{color:#16A34A}
.act:hover{background:var(--hover);color:var(--accent-2)}

.think{border-left:2px solid var(--accent-line);margin-bottom:12px;padding:2px 0 2px 12px}
.think-head{font-size:12.5px;color:var(--dim);cursor:pointer;user-select:none;display:flex;align-items:center;gap:6px}
.think-head .brain-ic{flex:0 0 auto;display:block}
.think-head:hover{color:var(--accent-2)}
.think-body{font-size:13px;color:var(--muted);white-space:pre-wrap;margin-top:8px;display:none;max-height:420px;overflow-y:auto}
.think.open .think-body{display:block}

.cursor{display:inline-block;width:7px;height:15px;background:var(--accent-2);vertical-align:-2px;animation:blink 1s steps(1) infinite;border-radius:1px}
@keyframes blink{0%,50%{opacity:1}50.01%,100%{opacity:0}}

/* markdown */
.md p{margin:0 0 14px}
.md p:last-child{margin-bottom:0}
.md h1,.md h2,.md h3{margin:20px 0 12px;font-weight:600;line-height:1.35}
.md h1{font-size:22px}.md h2{font-size:19px}.md h3{font-size:16.5px}
.md ul,.md ol{margin:0 0 14px;padding-left:24px}
.md li{margin:5px 0}
.md a{color:var(--accent-2);text-decoration:none}
.md a:hover{text-decoration:underline}
.md blockquote{margin:0 0 14px;padding:2px 0 2px 14px;border-left:3px solid var(--accent-line);color:var(--muted)}
.md hr{border:none;border-top:1px solid var(--border);margin:18px 0}
.md code.inline{background:var(--panel-2);border:1px solid var(--border);padding:2px 6px;border-radius:5px;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.md table{border-collapse:collapse;margin:0 0 14px;font-size:13.5px;display:block;overflow-x:auto;max-width:100%}
.md th,.md td{border:1px solid var(--border);padding:7px 11px;text-align:left}
.md th{background:var(--panel-2);font-weight:600}
.codeblock{margin:0 0 14px;border-radius:12px;overflow:hidden;background:var(--code-bg);border:1px solid var(--border)}
.code-head{display:flex;align-items:center;justify-content:space-between;padding:7px 12px;background:var(--code-head);font-size:12px;color:var(--dim)}
.code-head button{font-size:12px;color:var(--dim);display:flex;align-items:center;gap:5px;padding:3px 7px;border-radius:6px}
.code-head button:hover{background:var(--hover);color:var(--accent-2)}
.codeblock pre{margin:0;padding:14px;overflow-x:auto}
.codeblock code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px;line-height:1.55;white-space:pre}
.tk-k{color:var(--tk-k)}.tk-s{color:var(--tk-s)}.tk-c{color:var(--tk-c);font-style:italic}.tk-n{color:var(--tk-n)}.tk-f{color:var(--tk-f)}

/* composer */
.composer-wrap{padding:0 20px 14px;background:linear-gradient(180deg,transparent,var(--bg) 40%)}
.composer{max-width:768px;margin:0 auto;background:var(--input);border-radius:24px;padding:10px 10px 8px;display:flex;flex-direction:column;gap:4px;border:1px solid var(--border);transition:.15s}
.composer:focus-within{border-color:var(--accent-ring);box-shadow:0 0 0 3px var(--accent-soft)}
.composer textarea{width:100%;resize:none;max-height:200px;padding:7px 8px 2px;line-height:1.5;font-size:15px;background:transparent;border:0;outline:none;color:var(--text)}
.composer textarea::placeholder{color:var(--dim)}
.composer-bar{display:flex;align-items:center;justify-content:space-between;gap:8px}
.send-btn{height:34px;padding:0 15px;flex:0 0 auto;border-radius:20px;background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;display:flex;align-items:center;justify-content:center;gap:6px;font-size:13px;font-weight:500;transition:.15s;box-shadow:0 6px 16px rgba(49,115,238,.32)}
.send-btn:hover{filter:brightness(1.09)}
.send-btn:disabled{background:var(--panel-3);color:var(--dim);cursor:not-allowed;box-shadow:none}
.send-btn.stop{background:linear-gradient(135deg,var(--err),#C13B41);box-shadow:none}
.composer-hint{max-width:768px;margin:7px auto 0;text-align:center;font-size:11.5px;color:var(--dim)}
/* 输入框内:下方工具行(左:上传/清空 右:模型选择 + 发送) */
.composer-tools{display:flex;align-items:center;gap:2px;flex:0 0 auto;background:var(--panel);border:1px solid var(--border);border-radius:20px;padding:2px}
.composer-tools .attach-btn{padding:6px;border-radius:50%;margin-bottom:0}
.composer-tools .attach-btn:hover{background:var(--hover);color:var(--accent-2)}
.composer-right{display:flex;align-items:center;gap:8px;min-width:0;margin-left:auto}
.composer .model-pick{flex:0 0 auto;min-width:0}
.composer .model-pill{max-width:36vw;padding:6px 10px;font-size:12px;gap:6px;background:var(--panel);border:1px solid var(--border);border-radius:20px}
.composer .model-pill .m-name,.composer .model-pill #modelName{min-width:0}
.composer .model-pill .m-ch{flex:0 0 auto;font-size:10.5px;color:var(--dim);background:var(--input-2);border:1px solid var(--border);padding:1px 6px;border-radius:20px}
.composer .model-menu{left:0;right:auto;bottom:calc(100% + 8px);top:auto}
.composer-bar>.model-pick{margin-left:6px}
.composer-bar>.model-pick .model-pill{max-width:32vw}
@media (max-width:560px){
  .composer .model-pill{max-width:30vw}
  .composer-bar>.model-pick .model-pill{max-width:34vw}
  .composer .model-pill .m-ch{display:none}
  .send-btn{padding:0 12px}
}

/* modal / admin */
.modal{position:fixed;inset:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;z-index:60;padding:22px;backdrop-filter:blur(3px)}
.modal-card{width:100%;max-width:820px;max-height:88vh;background:var(--panel);border:1px solid var(--border);border-radius:16px;display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--shadow)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--border-2)}
.modal-head h2{margin:0;font-size:16.5px;font-weight:600}
.tabs{display:flex;gap:4px;padding:10px 14px 0;border-bottom:1px solid var(--border-2);overflow-x:auto}
.tab{padding:9px 13px;font-size:13.5px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}
.tab.active{color:var(--accent-2);border-bottom-color:var(--accent-2)}
.modal-body{padding:18px;overflow-y:auto}
.tabpane{display:none}
.tabpane.active{display:block}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:22px}
.stat{background:var(--panel-2);border:1px solid var(--border);border-radius:12px;padding:14px}
.stat-num{font-size:21px;font-weight:600;color:var(--accent-2)}
.stat-label{font-size:12px;color:var(--dim);margin-top:3px}
.sec-title{font-size:13.5px;color:var(--muted);margin:20px 0 10px;font-weight:600}
.table-wrap{overflow-x:auto;border:1px solid var(--border-2);border-radius:10px}
table{width:100%;border-collapse:collapse;font-size:12.5px}
th,td{text-align:left;padding:9px 11px;border-bottom:1px solid var(--border-2);white-space:nowrap}
th{background:var(--panel-2);color:var(--muted);font-weight:500}
tr:last-child td{border-bottom:none}
.row-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.row-form input{background:var(--input);border:1px solid var(--border);border-radius:10px;padding:10px 13px;font-size:13.5px;min-width:150px;flex:1}
.field{margin-bottom:14px}
.field label{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.field input{width:100%;background:var(--input);border:1px solid var(--border);border-radius:10px;padding:11px 13px;font-size:13.5px}
.field input:focus,.row-form input:focus,.login-card input:focus{border-color:var(--accent-ring)}
.copy-line{display:flex;gap:8px;align-items:center}
.copy-line input{flex:1}
.key-list{display:flex;flex-direction:column;gap:9px}
.key-row{background:var(--panel-2);border:1px solid var(--border);border-radius:11px;padding:12px 14px;display:flex;flex-direction:column;gap:8px}
.key-row.off{opacity:.5}
.key-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.key-name{font-size:14px;font-weight:500}
.key-tag{font-size:11.5px;color:var(--dim);background:var(--panel-3);padding:2px 8px;border-radius:20px}
.key-val{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:12px;color:var(--accent-2);background:var(--accent-soft);padding:8px 10px;border-radius:8px;word-break:break-all;border:1px solid var(--accent-line);white-space:pre-line}
.key-ops{display:flex;gap:7px;flex-wrap:wrap}
.mini-btn{font-size:12px;padding:5px 10px;border-radius:8px;background:var(--input);border:1px solid var(--border);color:var(--text)}
.mini-btn:hover{background:var(--input-2);border-color:var(--accent-line);color:var(--accent-2)}
.mini-btn.danger{color:var(--err)}
.msg{font-size:12.5px;color:var(--muted)}
.doc-p{font-size:13.5px;color:var(--muted);margin:0 0 16px}

/* ---------------- auth ---------------- */
.auth-tabs{display:flex;gap:4px;background:var(--input);border:1px solid var(--border);border-radius:11px;padding:4px;margin:0 0 18px}
.auth-tab{flex:1;padding:9px;border-radius:9px;font-size:13.5px;color:var(--muted);transition:.15s}
.auth-tab:hover{color:var(--accent-2)}
.auth-tab.active{background:var(--panel-2);color:var(--text);font-weight:600;border:1px solid var(--accent-line)}
.auth-pane input{margin-bottom:10px}
.code-row{display:flex;gap:8px;margin-bottom:10px;align-items:stretch}
.code-row input{flex:1;margin-bottom:0;min-width:0}
.code-row .btn-ghost{flex:0 0 auto;white-space:nowrap}
.auth-links{display:flex;justify-content:space-between;gap:12px;margin-top:14px;font-size:12.5px;flex-wrap:wrap}
.auth-links a{color:var(--muted);cursor:pointer}
.auth-links a:hover{color:var(--accent-2);text-decoration:underline}

/* ---------------- account panel ---------------- */
.acct-info{display:flex;gap:10px;flex-wrap:wrap;padding:14px 16px 0}
.acct-cell{flex:1;min-width:130px;background:var(--panel-2);border:1px solid var(--border);border-radius:11px;padding:10px 13px}
.acct-cell span{display:block;font-size:11.5px;color:var(--dim);margin-bottom:4px}
.acct-cell b{font-size:13.5px;font-weight:600;word-break:break-all}
.atab{padding:9px 13px;font-size:13.5px;color:var(--muted);border-bottom:2px solid transparent;white-space:nowrap}
.atab:hover{color:var(--accent-2)}
.atab.active{color:var(--accent-2);border-bottom-color:var(--accent-2)}
.apane{display:none}
.apane.active{display:block}
.field.grow{flex:1;min-width:140px;margin-bottom:0}
.field select{width:100%;background:var(--input);border:1px solid var(--border);border-radius:10px;padding:11px 13px;font-size:13.5px;color:var(--text)}

/* ---------------- user list ---------------- */
.user-list{display:flex;flex-direction:column;gap:10px}
.user-row{background:var(--panel-2);border:1px solid var(--border);border-radius:11px;padding:12px 14px;display:flex;flex-direction:column;gap:9px}
.user-row.off{opacity:.55}
.user-top{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.user-mail{font-weight:600;font-size:13.5px}
.user-tag{font-size:11.5px;color:var(--muted);background:var(--panel-3);border-radius:6px;padding:2px 7px}
.user-ops{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.user-ops input{background:var(--input);border:1px solid var(--border);border-radius:9px;padding:7px 11px;font-size:12.5px;width:110px}

.doc-pre{background:var(--code-bg);border:1px solid var(--border);border-radius:10px;padding:14px;font-size:12.5px;overflow-x:auto;font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--text);line-height:1.6;white-space:pre;margin:0}
.only-mobile{display:none}

@media (max-width:820px){
  .only-mobile{display:flex}
  .sidebar{position:fixed;left:0;top:0;bottom:0;z-index:40;transform:translateX(-100%);transition:transform .22s ease;box-shadow:6px 0 30px rgba(0,0,0,.35)}
  .sidebar.open{transform:translateX(0)}
  .scrim{display:block;position:fixed;inset:0;background:var(--overlay);z-index:35;opacity:0;pointer-events:none;transition:.22s}
  .scrim.open{opacity:1;pointer-events:auto}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .empty{padding-top:10vh}
  .empty h2{font-size:24px}
  .msgs{padding:18px 14px 0}
  .bubble-user{max-width:88%}
  .composer-wrap{padding:0 12px 10px}
  .msg-actions{opacity:1}
  .modal{padding:0}
  .modal-card{max-width:100%;height:100dvh;max-height:100dvh;border-radius:0}
}

/* ---------------- 回到最新 ---------------- */
.jump-wrap{position:sticky;bottom:14px;height:0;display:flex;justify-content:center;pointer-events:none;z-index:6}
.jump-btn{pointer-events:auto;display:flex;align-items:center;gap:6px;background:var(--panel);color:var(--text);border:1px solid var(--accent-line);border-radius:999px;padding:7px 14px;font-size:12.5px;box-shadow:var(--shadow);transition:.15s}
.jump-btn:hover{background:var(--hover);color:var(--accent-2)}

/* ---------------- 上传 ---------------- */
.attach-btn{color:var(--dim);padding:6px;border-radius:50%;flex:0 0 auto;margin-bottom:2px}
.attach-btn:hover{background:var(--input-2);color:var(--accent-2)}
.att-list{max-width:768px;margin:0 auto 8px;display:flex;flex-wrap:wrap;gap:8px}
.att-chip{position:relative;display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:6px 9px;max-width:250px;box-shadow:0 2px 8px rgba(0,0,0,.16)}
.att-chip.up{opacity:.75}
.att-chip.err{border-color:var(--err);background:rgba(229,72,77,.10)}
.att-chip .thumb{width:34px;height:34px;border-radius:8px;object-fit:cover;background:var(--input);flex:0 0 auto}
.att-chip .fico{width:34px;height:34px;border-radius:8px;background:var(--input);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:17px;flex:0 0 auto}
.att-chip .cmeta{display:flex;flex-direction:column;min-width:0}
.att-chip .cname{font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}
.att-chip .cnote{font-size:11px;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:150px}
.att-chip .cx{position:absolute;top:-7px;right:-7px;width:20px;height:20px;border-radius:50%;background:var(--panel-3);border:1px solid var(--border);color:var(--text);font-size:12px;line-height:1;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(0,0,0,.28)}
.drop-mask{position:absolute;inset:0;background:var(--mask);backdrop-filter:blur(2px);z-index:30;display:flex;align-items:center;justify-content:center}
.drop-box{border:2px dashed var(--accent-2);color:var(--accent-2);border-radius:16px;padding:26px 34px;font-size:15px;font-weight:600;background:var(--accent-soft)}

/* 气泡里的附件 */
.bubble-user{display:flex;flex-direction:column;gap:8px}
.bubble-text{white-space:pre-wrap;word-break:break-word}
.att-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:6px}
.att-grid.one{grid-template-columns:1fr}
.att-img{display:block;border-radius:12px;overflow:hidden;background:var(--input);line-height:0}
.att-img img{width:100%;max-height:320px;object-fit:cover;display:block}
.att-file{display:flex;align-items:center;gap:9px;background:var(--panel);border:1px solid var(--border);border-radius:11px;padding:8px 11px;text-decoration:none;color:inherit;max-width:320px}
.att-file:hover{background:var(--hover)}
.att-ico{font-size:17px}
.att-meta{display:flex;flex-direction:column;min-width:0}
.att-meta b{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:210px}
.att-meta i{font-size:11px;color:var(--dim);font-style:normal;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:210px}
.att-warn{font-size:11.5px;color:var(--warn);background:rgba(229,161,58,.12);border:1px solid rgba(229,161,58,.34);border-radius:8px;padding:5px 9px;margin:0 0 8px}

@media (max-width:820px){
  .att-grid{grid-template-columns:repeat(auto-fit,minmax(96px,1fr))}
  .att-chip .cname,.att-chip .cnote{max-width:110px}
}