/* ============ Transit LLM —— 设计系统 ============ */
:root{
  --bg:#f6f7fb; --surface:#fff; --surface-2:#fafbfe;
  --ink:#0d1526; --muted:#6b7385; --line:#e6e9f2;
  --accent:#5145e5; --accent-ink:#fff; --accent-soft:#eeecfe;
  --ok:#0f7b4f; --ok-soft:#e7f7ef;
  --warn:#a45b00; --warn-soft:#fdf1e2;
  --bad:#c02626; --bad-soft:#fdecec;
  --nav:#3f4859;
  --radius:14px; --radius-sm:10px;
  --shadow:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
  --shadow-lg:0 24px 60px rgba(15,23,42,.18);
}
[data-theme="dark"]{
  --bg:#0b0f16; --surface:#141a24; --surface-2:#10161f;
  --ink:#e9eff8; --muted:#b4c0d2; --line:#333d4e;
  --accent:#8b7cf8; --accent-ink:#0b0f16; --accent-soft:#241f42;
  --nav:#b6c2d4;
  --ok:#4ade80; --ok-soft:#12301f;
  --warn:#fbbf24; --warn-soft:#33260d;
  --bad:#f87171; --bad-soft:#3a1616;
  --shadow:0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  --shadow-lg:0 24px 60px rgba(0,0,0,.55);
}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:#d2d8e5;border-radius:6px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#bfc7d8}
::-webkit-scrollbar-track{background:transparent}
[data-theme="dark"] ::-webkit-scrollbar{width:10px;height:10px}
[data-theme="dark"] ::-webkit-scrollbar-thumb{background:#2f3947;border-radius:6px;border:2px solid var(--surface)}
[data-theme="dark"] ::-webkit-scrollbar-track{background:transparent}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased; transition:background .2s,color .2s;
}
a{color:var(--accent);text-decoration:none}
h1,h2,h3{margin:0;font-weight:660;letter-spacing:-.015em}
h1{font-size:21px} h2{font-size:15px} h3{font-size:13.5px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}
.muted{color:var(--muted)} .small{font-size:12.5px} .tiny{font-size:11.5px}
.nowrap{white-space:nowrap}
::selection{background:var(--accent-soft);color:var(--ink)}

/* ============ 布局 ============ */
.app{display:grid;grid-template-columns:238px minmax(0,1fr);min-height:100vh}
.sidebar{
  position:sticky;top:0;height:100vh;display:flex;flex-direction:column;
  background:var(--surface);border-right:1px solid var(--line);padding:16px 12px;z-index:40;
}
.brand{display:flex;align-items:center;gap:10px;padding:6px 10px 18px;font-weight:720;letter-spacing:-.02em}
.brand .logo{
  width:30px;height:30px;border-radius:9px;display:grid;place-items:center;font-size:14px;font-weight:800;
  background:linear-gradient(135deg,var(--accent),#8b7cf8);color:#fff;box-shadow:0 4px 12px rgba(81,69,229,.35);
  flex:none;
}
.brand .nm{line-height:1.15;overflow:hidden}
.brand .nm b{display:block;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand .nm span{font-size:10.5px;color:var(--muted);font-weight:500;letter-spacing:.04em}

.nav-scroll{flex:1;overflow-y:auto;padding-right:2px}
.nav-group{font-size:10.5px;color:var(--muted);font-weight:650;letter-spacing:.08em;
  text-transform:uppercase;padding:14px 12px 6px}
.nav-item{
  display:flex;align-items:center;gap:10px;padding:8.5px 11px;border-radius:var(--radius-sm);
  color:var(--nav);font-weight:560;cursor:pointer;border:0;background:none;width:100%;position:relative;
  font:inherit;text-align:left;transition:background .14s,color .14s;margin-bottom:1px;
}
.nav-item:hover{background:var(--surface-2);color:var(--ink)}
.nav-item.on{background:var(--accent-soft);color:var(--accent);font-weight:650}
.nav-item.on::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:15px;border-radius:0 3px 3px 0;background:var(--accent)}
.nav-item .ico{width:17px;text-align:center;font-size:13.5px;flex:none;opacity:.9}
.nav-item .cnt{margin-left:auto;font-size:10.5px;background:var(--bad);color:#fff;border-radius:999px;
  padding:1px 6px;font-weight:700}

.side-foot{border-top:1px solid var(--line);padding-top:10px;margin-top:8px}
.user-row{display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:var(--radius-sm)}
.user-row:hover{background:var(--surface-2)}
.avatar{width:28px;height:28px;border-radius:50%;background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-weight:720;font-size:12px;flex:none}
.user-row .meta{overflow:hidden;line-height:1.25}
.user-row .meta b{display:block;font-size:12.5px;font-weight:620;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.user-row .meta span{font-size:10.5px;color:var(--muted)}
.icon-btn{width:30px;height:30px;border-radius:9px;border:1px solid var(--line);background:var(--surface);
  color:var(--muted);display:grid;place-items:center;cursor:pointer;font-size:14px;flex:none}
.icon-btn:hover{color:var(--ink);background:var(--surface-2)}

.main{padding:24px 30px 70px;width:100%;min-width:0}
.nav-toggle{display:none}

/* ============ 页头 ============ */
.page-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.page-head .t h1{font-size:22px}
.page-head .t p{margin:3px 0 0;color:var(--muted);font-size:13px}
.page-head .actions{margin-left:auto;display:flex;gap:9px;align-items:center;flex-wrap:wrap}

/* ============ 卡片 ============ */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
[data-theme="dark"] .card{border-color:#36415480}
.card-hd{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);flex-wrap:wrap}
.card-hd h2{font-size:14.5px}
.card-hd .spacer{flex:1}
.card-bd{padding:18px}
.card-ft{padding:12px 18px;border-top:1px solid var(--line);background:var(--surface-2);
  border-radius:0 0 var(--radius) var(--radius);font-size:12.5px;color:var(--muted)}

.grid{display:grid;gap:14px}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
@media(max-width:1100px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:1fr}}
@media(max-width:820px){.g4,.g2{grid-template-columns:1fr}}

.stat{padding:16px 18px;position:relative;overflow:hidden}
.stat .k{color:var(--muted);font-size:12.5px;font-weight:560;display:flex;align-items:center;gap:6px}
.stat .v{font-size:27px;font-weight:720;letter-spacing:-.03em;margin-top:6px;
  font-variant-numeric:tabular-nums;line-height:1.15}
.stat .v small{font-size:13px;font-weight:600;color:var(--muted);margin-left:3px;letter-spacing:0}
.stat .hint{font-size:12px;color:var(--muted);margin-top:4px}
.stat.accent{background:linear-gradient(135deg,var(--accent),#8b7cf8 70%,#a78bfa);color:#fff;border:0;
  box-shadow:0 8px 22px rgba(81,69,229,.22)}
.stat.accent::after{content:"";position:absolute;right:-30px;top:-40px;width:130px;height:130px;
  border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.22),transparent 68%)}
.stat.accent .k,.stat.accent .hint{color:rgba(255,255,255,.9)}
.stat.accent .v small{color:rgba(255,255,255,.85);font-size:14px}
.stat.accent .v{color:#fff}

/* ============ 表格 ============ */
.table-wrap{overflow:auto;max-height:calc(100vh - 260px);border-radius:0 0 var(--radius) var(--radius)}
table{width:100%;border-collapse:separate;border-spacing:0}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;
  font-size:13px;vertical-align:middle}
thead th{position:sticky;top:0;z-index:2;background:var(--surface-2);font-size:11.5px;
  color:var(--nav);font-weight:680;letter-spacing:.02em;border-bottom:1px solid var(--line)}
tbody tr:hover td{background:var(--surface-2)}
tbody tr:last-child td{border-bottom:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
.cell-main{font-weight:620}
.cell-sub{font-size:11.5px;color:var(--muted);margin-top:1px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 13px;
  border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--surface);
  color:var(--ink);font:inherit;font-weight:600;cursor:pointer;
  transition:background .14s,border-color .14s,transform .06s;white-space:nowrap;
}
.btn:hover{background:var(--surface-2);border-color:var(--muted)}
[data-theme="dark"] .btn:not(.primary):not(.ghost){border-color:#3f4a5e;background:#171e2a}
[data-theme="dark"] .btn:not(.primary):not(.ghost):hover{background:#1e2735;border-color:#55627a}
.btn:active{transform:translateY(1px)}
.btn.primary{background:linear-gradient(135deg,var(--accent),#8b7cf8);border-color:transparent;
  color:#fff;box-shadow:0 2px 6px rgba(81,69,229,.18)}
.btn.primary:hover{filter:brightness(1.06);box-shadow:0 6px 16px rgba(81,69,229,.24)}
.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted)}
.btn.ghost:hover{background:var(--surface-2);color:var(--ink)}
.btn.danger{color:var(--bad);border-color:var(--line)}
.btn.danger:hover{background:var(--bad-soft);border-color:var(--bad)}
.btn.sm{padding:5px 10px;font-size:12.5px;border-radius:8px}
.btn.xs{padding:3px 8px;font-size:11.5px;border-radius:7px;font-weight:600}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ============ 键盘可达性 ============ */
a:focus-visible,button:focus-visible,.nav-item:focus-visible,.btn:focus-visible,
select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:8px;
}
.modal:focus{outline:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ============ 表单 ============ */
label{display:block;font-size:12px;color:var(--muted);font-weight:600;margin:0 0 6px}
.input,select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius-sm);
  background:var(--surface);font:inherit;color:var(--ink);outline:none;
  transition:border-color .14s,box-shadow .14s;
}
.input::placeholder{color:var(--muted);opacity:.75}
select{appearance:none;-webkit-appearance:none;padding-right:30px;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b7385' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 9px center;background-size:14px}
[data-theme="dark"] select{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23b4c0d2' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E")}
.input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.input:disabled{background:var(--surface-2);color:var(--muted)}
.field{margin-bottom:14px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>*{flex:1;min-width:130px}
.hint-row{font-size:11.5px;color:var(--muted);margin-top:5px}

/* ============ 徽标 / 标签 ============ */
.badge{display:inline-flex;align-items:center;gap:5px;padding:2px 8px;border-radius:999px;
  font-size:11.5px;font-weight:650;white-space:nowrap}
.badge.ok{background:var(--ok-soft);color:var(--ok)}
.badge.bad{background:var(--bad-soft);color:var(--bad)}
.badge.warn{background:var(--warn-soft);color:var(--warn)}
.badge.gray{background:var(--surface-2);color:var(--muted);border:1px solid var(--line)}
.chip{display:inline-block;padding:3px 9px;border-radius:8px;background:var(--surface-2);
  border:1px solid var(--line);font-size:12px;margin:0 5px 5px 0}

/* ============ 图表 ============ */
.bars-wrap{position:relative;padding-top:16px}
.bars-wrap .gridlines{position:absolute;left:0;right:0;top:16px;bottom:22px;display:flex;
  flex-direction:column;justify-content:space-between;pointer-events:none}
.bars-wrap .gridlines i{height:1px;background:var(--line);opacity:.75}
.bars-wrap .bars-peak{position:absolute;right:0;top:-2px;font-size:11px;color:var(--muted);
  font-variant-numeric:tabular-nums}
.bars-wrap .bars{position:relative;z-index:1}
.bars{display:flex;align-items:flex-end;gap:12px;height:150px;padding-top:8px}
.bar{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:7px;height:100%}
.bar .vl{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.bar .col.zero{background:var(--muted);opacity:.22}
.bar .col{width:100%;max-width:46px;border-radius:8px 8px 3px 3px;min-height:3px;
  background:linear-gradient(180deg,var(--accent),color-mix(in srgb,var(--accent) 55%, #000 0%));
  opacity:.9;transition:opacity .15s}
.bar:hover .col{opacity:1}
.bar .lb{font-size:11px;color:var(--muted)}

/* ============ 弹层 ============ */
.mask{position:fixed;inset:0;background:rgba(9,13,20,.55);backdrop-filter:blur(2px);
  display:none;place-items:center;z-index:80;padding:18px}
.mask.on{display:grid}
.modal{width:min(560px,100%);max-height:90vh;overflow:auto;background:var(--surface);
  border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-lg)}
.modal .mh{display:flex;align-items:center;padding:15px 20px;border-bottom:1px solid var(--line);
  font-weight:680;font-size:14.5px;position:sticky;top:0;background:var(--surface);z-index:1}
.modal .mb{padding:20px}
.modal .mf{display:flex;justify-content:flex-end;gap:10px;padding:13px 20px;border-top:1px solid var(--line);
  background:var(--surface-2);position:sticky;bottom:0}

/* ============ 提示条 ============ */
#toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);z-index:120;
  display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--ink);color:var(--bg);padding:9px 16px;border-radius:10px;font-size:13px;
  opacity:0;transform:translateY(8px);transition:.24s;box-shadow:var(--shadow-lg);font-weight:520}
.toast.on{opacity:1;transform:none}
.toast.bad{background:var(--bad);color:#fff}

/* ============ 空态 / 骨架 ============ */
.empty{padding:44px 20px;text-align:center;color:var(--muted)}
.empty .ic{font-size:26px;opacity:.5;margin-bottom:8px}
.empty .tt{font-weight:620;color:var(--ink);margin-bottom:3px;font-size:13.5px}
.sk{display:inline-block;height:11px;width:100%;min-width:44px;border-radius:5px;
  background:linear-gradient(90deg,var(--surface-2) 25%,var(--line) 37%,var(--surface-2) 63%);
  background-size:400% 100%;animation:sk 1.3s ease infinite}
@keyframes sk{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* ============ 登录 ============ */
/* 登录页样式在 templates/login.html 内（双栏品牌页） */
/* ============ 代码 / KV ============ */
pre{background:#0d1526;color:#dbe4f0;padding:14px 16px;border-radius:11px;overflow-x:auto;
  font-size:12.5px;line-height:1.65;margin:0;border:1px solid #1d2635}
[data-theme="dark"] pre{background:#080b11;border-color:var(--line)}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.kv{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:13px}
.kv:last-child{border-bottom:0}
.kv b{font-weight:640;text-align:right}

/* ============ 账户信息 ============ */
.acct-hero{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:16px 18px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent-soft),transparent 78%);border:1px solid var(--line)}
.acct-hero .blk{min-width:0}
.acct-hero .lb{font-size:11.5px;color:var(--muted);font-weight:600;letter-spacing:.02em}
.acct-hero .amt{font-size:29px;font-weight:740;letter-spacing:-.035em;line-height:1.12;margin-top:2px;
  font-variant-numeric:tabular-nums;color:var(--accent)}
.acct-hero .amt small{font-size:14px;font-weight:650;color:var(--muted);margin-right:2px;letter-spacing:0}
.acct-hero .sub{font-size:13.5px;font-weight:660;font-variant-numeric:tabular-nums;margin-top:1px}
.acct-hero .sep{width:1px;align-self:stretch;background:var(--line);margin:2px 0}
.acct-hero .id{margin-left:auto;text-align:right;line-height:1.35}
.acct-hero .id b{font-size:14px;font-weight:680;display:block;overflow:hidden;text-overflow:ellipsis}
.acct-hero .id span{font-size:11.5px;color:var(--muted)}
.acct-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-top:14px}
.acct-grid .it{background:var(--surface);padding:11px 14px;min-width:0}
.acct-grid .it .k{font-size:11.5px;color:var(--muted);font-weight:600;margin-bottom:3px}
.acct-grid .it .v{font-size:14px;font-weight:660;font-variant-numeric:tabular-nums;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acct-grid .it .v small{font-size:11.5px;color:var(--muted);font-weight:600;margin-left:3px}
.acct-grid .it .v.money{letter-spacing:-.01em}
@media(max-width:560px){.acct-hero{gap:14px}.acct-hero .amt{font-size:25px}}

/* ============ 聊天 ============ */
.chat{height:360px;overflow-y:auto;border:1px solid var(--line);border-radius:12px;padding:14px;
  background:var(--surface-2);display:flex;flex-direction:column;gap:9px}
.msg{max-width:84%;padding:9px 13px;border-radius:13px;white-space:pre-wrap;word-break:break-word;
  font-size:13.5px;line-height:1.65}
.msg.user{align-self:flex-end;background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:5px}
.msg.assistant{align-self:flex-start;background:var(--surface);border:1px solid var(--line);
  border-bottom-left-radius:5px}
.msg.meta{align-self:center;font-size:11.5px;color:var(--muted);background:var(--surface);
  border:1px solid var(--line);padding:3px 11px;border-radius:999px;max-width:100%}

/* ============ 提示块 ============ */
.note{display:flex;gap:10px;padding:12px 14px;border-radius:12px;font-size:12.5px;line-height:1.6;
  border:1px solid var(--line);background:var(--surface-2)}
.note.warn{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 30%,transparent);color:var(--warn)}
.note.bad{background:var(--bad-soft);border-color:color-mix(in srgb,var(--bad) 30%,transparent);color:var(--bad)}
.note .ic{flex:none;font-size:14px}

/* ============ 区块显隐 ============ */
.section{display:none}
.section.on{display:block;animation:fade .18s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ============ 响应式 ============ */
@media(max-width:900px){
  .app{grid-template-columns:minmax(0,1fr)}
  .main{min-width:0;max-width:100%}
  .sidebar{position:fixed;left:0;top:0;width:250px;transform:translateX(-100%);
    transition:transform .22s ease;box-shadow:var(--shadow-lg)}
  body.nav-open .sidebar{transform:none}
  body.nav-open::after{content:"";position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:35}
  .main{padding:16px 16px 60px}
  .nav-toggle{display:grid;place-items:center;position:fixed;left:14px;bottom:14px;z-index:50;
    width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--surface);
    box-shadow:var(--shadow-lg);font-size:17px;cursor:pointer;color:var(--ink)}
  .page-head .t h1{font-size:19px}
  .stat .v{font-size:23px}
  .table-wrap{max-height:none;overflow-x:auto;-webkit-overflow-scrolling:touch;position:relative}
  .table-wrap::before{content:"← 左右滑动查看全部列 →";position:sticky;left:0;display:block;
    font-size:11px;color:var(--muted);padding:6px 14px;background:var(--surface-2);
    border-bottom:1px solid var(--line)}
  table{min-width:680px}
  thead th:first-child,tbody td:first-child{position:sticky;left:0;z-index:2;background:var(--surface)}
  thead th:first-child{z-index:3;background:var(--surface-2)}
  tbody tr:hover td:first-child{background:var(--surface-2)}
}