:root{--gold:#c9a84c;--dark:#0d0a06;--paper:#f4f4f2;--danger:#b42318;--ok:#067647}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--paper);color:#1a1a1a}
.login-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:linear-gradient(135deg,#0d0a06,#34230d)}
.login-card{width:min(100%,460px);background:#fff;border-radius:14px;padding:30px;box-shadow:0 24px 70px rgba(0,0,0,.3)}
.logo{font:26px Georgia,serif;color:var(--gold);margin-bottom:8px}
.muted{color:#667085;line-height:1.55}
.field{display:flex;flex-direction:column;gap:7px;margin:16px 0}
label{font-size:13px;font-weight:700}
input{width:100%;padding:12px;border:1px solid #d0d5dd;border-radius:7px;font-size:15px}
button{border:0;border-radius:7px;background:var(--gold);color:var(--dark);padding:12px 18px;font-weight:700;cursor:pointer}
.alert{padding:12px 14px;border-radius:7px;margin:14px 0;font-size:14px}
.alert.error{background:#fef3f2;color:var(--danger);border:1px solid #fecdca}
.layout{display:flex;min-height:100vh}
.sidebar{width:230px;background:var(--dark);color:#fff;padding:24px 16px;position:fixed;inset:0 auto 0 0}
.sidebar .logo{padding:0 10px 22px;border-bottom:1px solid rgba(201,168,76,.2)}
.menu{display:flex;flex-direction:column;gap:6px;margin-top:20px}
.menu a{color:rgba(255,255,255,.68);text-decoration:none;padding:11px 12px;border-radius:7px}
.menu a:hover,.menu a.active{background:rgba(201,168,76,.12);color:#fff}
.main{margin-left:230px;width:calc(100% - 230px)}
.topbar{background:#fff;border-bottom:1px solid #e5e7eb;padding:18px 28px;display:flex;justify-content:space-between;align-items:center}
.link-button{background:none;padding:0;color:#7a5a17}
.content{padding:28px}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:22px}
.card strong{font-size:30px;display:block;margin-top:10px}
.system-card{margin-top:18px}
.status{display:inline-flex;align-items:center;gap:7px;color:var(--ok);font-size:13px}
.status:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--ok)}
@media(max-width:800px){.sidebar{position:static;width:100%}.layout{display:block}.main{margin-left:0;width:100%}.cards{grid-template-columns:1fr}}