:root{
  --bg:#f8fafc; --card:#ffffff; --ink:#0f172a; --muted:#64748b; --accent:#2563eb; --ok:#16a34a; --danger:#dc2626; --border:#e2e8f0;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,Segoe UI,Roboto,Inter;color:var(--ink);background:var(--bg)}
.container{max-width:960px;margin:40px auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 6px 18px rgba(0,0,0,.04)}
h1{margin:0 0 12px}
label{font-weight:600;display:block;margin-bottom:6px}
input[type="text"],input[type="password"],input[type="date"],input[type="email"]{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1px solid transparent;border-radius:10px;background:var(--accent);color:#fff;font-weight:600;cursor:pointer}
.btn.secondary{background:#fff;color:var(--ink);border-color:var(--border)}
.table{width:100%;border-collapse:collapse;margin-top:14px}
.table th,.table td{border-bottom:1px solid var(--border);padding:10px;text-align:left}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-weight:700;font-size:12px}
.header{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}
.nav{display:flex;gap:8px;flex-wrap:wrap}
.footer{margin-top:24px;color:var(--muted);font-size:14px;text-align:center}
.brand{display:flex;align-items:center;gap:8px}
.brand__dot{width:10px;height:10px;border-radius:999px;background:var(--ok)}
.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:12px}
.span-3{grid-column:span 3}
.span-6{grid-column:span 6}
.span-12{grid-column:span 12}
@media (max-width:720px){.span-6{grid-column:span 12}}

.btn,
.btn:visited,
.btn:hover {
  text-decoration: none;
}

.header { 
  min-height: 88px;   
  align-items: center;    
}

.header h1 { 
  margin: 0; 
}


#adminBtn {
  text-decoration: none;
  background: #fff;
  color: #111;
  border: 1px solid #ccc;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  transition: all 0.25s ease;
}

#adminBtn:hover {
  background: #2563eb;
  color: #fff;
  border-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0,0,0,0.15);
  text-decoration: none;
}