:root{--ink:#172033;--muted:#637086;--line:#e5e9f0;--canvas:#f7f8fb;--card:#fff;--brand:#3158e8;--brand-soft:#ecf0ff;--good:#14836a;--good-soft:#eaf8f3;--warn:#a5690f;--warn-soft:#fff5df;--bad:#b54444;--bad-soft:#fdecec;--nav:#fff}
*{box-sizing:border-box}
body{margin:0;background:var(--canvas);color:var(--ink);font:14px/1.5 Inter,"PingFang SC","Microsoft YaHei",sans-serif}
button,input,select,textarea{font:inherit}

/* app shell: white brand sidebar + content column, shared by every authenticated back-office page */
.shell{display:grid;grid-template-columns:244px 1fr;min-height:100vh}
.nav{background:#fff;color:#253858;padding:20px 14px;border-right:1px solid #dfe7f0;display:flex;flex-direction:column}
.nav .brand{color:#17316f;font-size:20px;font-weight:750;letter-spacing:-.5px;padding:0 10px 28px}
.nav .logo-brand{width:100%;height:62px;display:flex;align-items:center;padding:0 10px;margin:0 0 20px;background:transparent;border:0;box-shadow:none}
.nav .logo-brand img{display:block;width:180px;height:46px;max-width:100%;object-fit:contain;object-position:left center}
.nav .org{display:flex;gap:10px;align-items:center;margin:0 6px 24px;padding:9px;background:#eef5fb;border:1px solid #cfe0ed;border-radius:9px}
.nav .org .avatar{width:26px;height:26px;border-radius:8px;background:#2d82c7;display:grid;place-items:center;color:#fff;font-weight:700;flex:none}
.nav .org small{display:block;color:#6480a2}
.nav h6{margin:18px 10px 7px;color:#6a86a5;font-size:11px;letter-spacing:.1em}
.nav a{display:block;color:#2e4667;text-decoration:none;padding:9px 10px;margin:2px 0;border-radius:7px}
.nav a.active,.nav a:hover{background:#eaf3fb;color:#1b5fa4;box-shadow:inset 3px 0 0 #d82e79}
.nav .foot{margin-top:auto;padding:10px;font-size:12px;color:#7189a6}
.nav .foot button{color:#385171;background:transparent;border:0;font:inherit;cursor:pointer;padding:0;margin-top:8px;text-align:left}
.nav .foot button:hover{color:#1b5fa4}

.page{padding:26px 34px;max-width:1250px;width:100%;margin:0 auto;align-self:start}
.top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:26px;flex-wrap:wrap;gap:12px}
.crumb{color:var(--muted);font-size:13px}
.crumb b{color:var(--ink)}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.headline{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:20px;flex-wrap:wrap;gap:12px}
.headline h1{margin:0;font-size:25px;letter-spacing:-.5px}
.headline p{margin:5px 0 0;color:var(--muted)}

/* shared components */
.btn{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 13px;color:var(--ink);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.btn.primary{border-color:var(--brand);background:var(--brand);color:#fff}
.btn.danger{border-color:var(--bad);color:var(--bad)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:0 2px 7px #18264b08}
.card h2{font-size:15px;margin:0 0 16px}
.page > .card + .card{margin-top:18px}
.muted{color:var(--muted);font-size:12px}
.empty{border:1px dashed #cfd8e5;border-radius:9px;padding:18px;color:var(--muted);text-align:center}
.tag{display:inline-block;background:var(--good-soft);color:var(--good);border-radius:10px;padding:2px 7px;font-size:11px;white-space:nowrap}
.tag.warn{background:var(--warn-soft);color:var(--warn)}
.tag.bad{background:var(--bad-soft);color:var(--bad)}
.list{padding:0;margin:0;list-style:none}
.list li,.row-item{display:flex;gap:10px;align-items:center;border-top:1px solid var(--line);padding:11px 0}
.list li:first-child,.row-item:first-child{border-top:0}
.avatar{width:30px;height:30px;background:var(--brand-soft);color:var(--brand);border-radius:8px;display:grid;place-items:center;font-weight:700;flex:none}
.status-msg{min-height:20px;margin-top:8px;font-size:12px;color:var(--bad)}
select,.field input,.field select,.field textarea{border:1px solid var(--line);border-radius:7px;padding:8px;width:100%}
dialog{width:min(560px,calc(100vw - 30px));border:0;border-radius:12px;padding:0;box-shadow:0 16px 50px #18264b44}
dialog::backdrop{background:#15213b66}
dialog form{padding:20px}
dialog h2{margin:0 0 14px;font-size:17px}
.field{display:grid;gap:5px;margin:10px 0}
.field label{font-size:12px;font-weight:700}
.dialog-actions{display:flex;gap:8px;justify-content:end;margin-top:16px}
.filters{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:15px}

@media(max-width:900px){.shell{grid-template-columns:1fr}.nav{display:none}.page{padding:20px}}