* {
  box-sizing: border-box;
  }

body {
margin: 0;
font-family: Arial, Helvetica, sans-serif;
background: #f4f6f9;
color: #333;
}

.login-page {
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
background: linear-gradient(135deg, #1f2937, #f39c12);
}

.login-box {
width: 380px;
background: #ffffff;
padding: 35px;
border-radius: 14px;
box-shadow: 0 15px 35px rgba(0,0,0,0.25);
}

.login-box h1 {
margin: 0 0 5px;
color: #1f2937;
text-align: center;
}

.login-box p {
text-align: center;
color: #6b7280;
margin-bottom: 25px;
}

.form-group {
margin-bottom: 18px;
}

label {
display: block;
font-weight: bold;
margin-bottom: 6px;
}

input,
select,
textarea {
width: 100%;
padding: 11px;
border: 1px solid #d1d5db;
border-radius: 8px;
font-size: 14px;
}

button,
.btn {
display: inline-block;
background: #f39c12;
color: #fff;
padding: 11px 18px;
border: none;
border-radius: 8px;
text-decoration: none;
cursor: pointer;
font-weight: bold;
transition: all 0.2s ease;
}

button:hover,
.btn:hover {
background: #d68910;
transform: translateY(-1px);
}

.error {
background: #fee2e2;
color: #991b1b;
padding: 10px;
border-radius: 8px;
margin-bottom: 15px;
text-align: center;
}

.sidebar {
width: 250px;
background: #1f2937;
color: #fff;
min-height: 100vh;
position: fixed;
left: 0;
top: 0;
padding: 25px 18px;
}

.sidebar h2 {
margin-top: 0;
margin-bottom: 25px;
font-size: 24px;
}

.sidebar a {
display: block;
color: #d1d5db;
text-decoration: none;
padding: 12px;
border-radius: 8px;
margin-bottom: 8px;
}

.sidebar a:hover {
background: #374151;
color: #fff;
}

.main {
margin-left: 250px;
padding: 30px;
}

.topbar {
background: #fff;
padding: 22px;
border-radius: 14px;
margin-bottom: 25px;
box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.cards {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 18px;
}

.card {
background: #fff;
padding: 22px;
border-radius: 14px;
box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.card h3 {
margin: 0 0 8px;
color: #374151;
}

.card .number {
font-size: 30px;
font-weight: bold;
color: #f39c12;
}

table {
width: 100%;
border-collapse: collapse;
}

table th {
background: #f39c12;
color: white;
padding: 12px;
}

table td {
padding: 10px;
border-bottom: 1px solid #e5e7eb;
}

table tr:hover {
background: #f8f9fa;
}