:root{--primary:#4f46e5;--ink:#111827;--muted:#6b7280;--line:#e5e7eb;--bg:#f8fafc;--card:#fff;--danger:#b91c1c;--warn:#b45309}
*{box-sizing:border-box}
body{margin:0;font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg)}
h1{font-size:1.5rem;margin:0 0 1rem}h2{font-size:1.1rem;margin:1.5rem 0 .5rem}
a{color:var(--primary)}
.muted{color:var(--muted)}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.1rem;margin-bottom:1rem}
.brand small{font-weight:400;color:var(--muted)}
.brand-mark{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff}
.btn{display:inline-block;padding:.55rem 1rem;border-radius:8px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;cursor:pointer;text-decoration:none}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-ghost{border-color:transparent;background:transparent}
.btn-block{width:100%;margin-top:.5rem}
label{display:block;margin:.75rem 0;font-weight:500}
input{display:block;width:100%;margin-top:.25rem;padding:.6rem .7rem;border:1px solid var(--line);border-radius:8px;font:inherit}
input:focus{outline:2px solid var(--primary);outline-offset:1px}
.alert{background:#fef2f2;color:var(--danger);border:1px solid #fecaca;padding:.7rem .9rem;border-radius:8px;margin:.75rem 0}
.alert.warn{background:#fffbeb;color:var(--warn);border-color:#fde68a}
.auth-body{min-height:100vh;display:grid;place-items:center;padding:1rem}
.auth-card{width:100%;max-width:400px;background:var(--card);padding:2rem;border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.07)}
.msg-page{max-width:480px;margin:15vh auto;padding:0 1rem;text-align:center}
.shell{display:flex;min-height:100vh}
.sidebar{width:230px;background:#fff;border-right:1px solid var(--line);padding:1.25rem 1rem;flex-shrink:0}
.sidebar.platform .brand-mark{background:#0f172a}
.sidebar nav a{display:block;padding:.55rem .75rem;border-radius:8px;color:var(--ink);text-decoration:none;margin-bottom:2px}
.sidebar nav a:hover{background:var(--bg)}
.sidebar nav a.active{background:#eef2ff;color:var(--primary);font-weight:600}
.main{flex:1;min-width:0}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 1.5rem;background:#fff;border-bottom:1px solid var(--line)}
.topbar form{display:flex;align-items:center;gap:.5rem;margin:0}
.content{padding:1.5rem}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1rem}
.card .label{display:block;color:var(--muted);font-size:.85rem}
.card .num{display:block;font-size:1.8rem;font-weight:700}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
th,td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line)}
th{background:var(--bg);font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted)}
@media(max-width:760px){
  .shell{flex-direction:column}
  .sidebar{width:100%;border-right:0;border-bottom:1px solid var(--line);padding:.75rem}
  .sidebar nav{display:flex;gap:.25rem;overflow-x:auto}
  .content{padding:1rem}
}