:root{
  --brand:#1A3060; --brand-d:#0F1D3D; --brand-light:#E8EFF8; --teal:#2BC4C0;
  --ink:#0f172a; --muted:#6b7280;
  --line:#e5e7eb; --bg:#f5f6f8; --card:#fff; --ok:#047857; --okbg:#ecfdf5;
  --err:#b91c1c; --errbg:#fee2e2;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink)}
a{color:var(--brand);text-decoration:none}
.boot{padding:60px;text-align:center;color:var(--muted)}
button{font:inherit;cursor:pointer}
input,textarea,select{font:inherit}

/* login */
.login-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:radial-gradient(1200px 600px at 50% -10%, #25406f 0%, var(--brand) 45%, var(--brand-d) 100%)}
.login-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:36px;max-width:400px;width:100%;box-shadow:0 20px 60px rgba(15,29,61,.35)}
.login-logo img{height:34px;display:block}
.brand{font-size:24px;font-weight:800;letter-spacing:-.01em}
.brand span{color:var(--brand)}
.sub{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--muted);font-weight:700;margin:8px 0 16px}
.staff-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.04em;color:var(--brand);background:var(--brand-light);padding:5px 11px;border-radius:99px;margin-bottom:18px}
.login-foot{margin-top:16px;font-size:11.5px;color:var(--muted);line-height:1.5;border-top:1px solid var(--line);padding-top:14px}
label{display:block;font-size:13px;font-weight:600;margin:0 0 6px}
.field{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;outline:none}
.field:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(109,40,217,.12)}
.btn{background:var(--brand);color:#fff;border:none;padding:11px 18px;border-radius:9px;font-weight:700}
.btn:hover{background:var(--brand-d)}
.btn:disabled{opacity:.6;cursor:default}
.btn.ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.ghost:hover{background:#f9fafb}
.btn.sm{padding:7px 12px;font-size:13px}
.btn.danger{background:#fff;color:var(--err);border:1px solid #fecaca}
.note{font-size:12px;color:var(--muted);background:#f8fafc;padding:10px 12px;border-radius:8px;margin-top:14px}
.alert-ok{font-size:13px;color:var(--ok);background:var(--okbg);padding:10px 12px;border-radius:8px;margin-top:12px}
.alert-err{font-size:13px;color:var(--err);background:var(--errbg);padding:10px 12px;border-radius:8px;margin-top:12px}

/* shell */
.shell{display:grid;grid-template-columns:230px 1fr;min-height:100vh}
.side{background:#fff;border-right:1px solid var(--line);padding:20px 14px;display:flex;flex-direction:column}
.side-brand{display:flex;align-items:center;gap:7px;padding:0 8px 18px}
.side-brand img{height:24px}
.side-brand span{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand)}
.nav a{display:flex;align-items:center;gap:9px;padding:10px 12px;border-radius:9px;color:#334155;font-weight:600;font-size:14px;margin-bottom:2px}
.nav a:hover{background:#f3f4f6}
.nav a.active{background:var(--brand-light);color:var(--brand)}
.side .who{margin-top:auto;padding:12px 8px 0;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.main{padding:26px 30px;overflow:auto}
.head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:12px;flex-wrap:wrap}
.head h1{font-size:21px;margin:0}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.row{display:flex;gap:10px;align-items:center}
.spread{justify-content:space-between}
.mb{margin-bottom:14px}
.muted{color:var(--muted)}
.small{font-size:12px}
.tag{display:inline-block;font-size:11px;font-weight:700;padding:2px 8px;border-radius:99px;background:var(--brand-light);color:var(--brand)}

/* post list */
.plist{display:flex;flex-direction:column;gap:8px}
.pitem{display:flex;align-items:center;justify-content:space-between;gap:10px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:13px 15px}
.pitem:hover{border-color:var(--brand)}
.pitem .t{font-weight:600}

/* editor */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ed-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.ed-area{width:100%;min-height:460px;border:1px solid var(--line);border-radius:10px;padding:14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13.5px;line-height:1.6;resize:vertical}
.preview{border:1px solid var(--line);border-radius:10px;padding:16px 18px;background:#fff;overflow:auto;max-height:560px}
.preview h1,.preview h2,.preview h3{line-height:1.25}
.preview img{max-width:100%;border-radius:8px}
.toolbar{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:8px}
.tb{border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 9px;font-size:13px;font-weight:600;color:#334155}
.tb:hover{background:#f3f4f6}
.fields label{margin-top:12px}
textarea.field{min-height:64px;resize:vertical}
.faq-item{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:10px;background:#fafafa}
@media(max-width:860px){.shell{grid-template-columns:1fr}.side{flex-direction:row;flex-wrap:wrap;align-items:center}.ed-wrap,.grid2{grid-template-columns:1fr}.side .who{margin:0}}
.toast{position:fixed;bottom:20px;right:20px;background:#0f172a;color:#fff;padding:12px 16px;border-radius:10px;font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.2);z-index:50}
.toast.err{background:#7f1d1d}
.spin{display:inline-block;width:14px;height:14px;border:2px solid #fff;border-top-color:transparent;border-radius:50%;animation:s .7s linear infinite;vertical-align:-2px}
@keyframes s{to{transform:rotate(360deg)}}