* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'SolaimanLipi', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.login-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-form h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.login-form input {
    width: 100%;
    padding: 12px;
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.login-form button {
    width: 100%;
    padding: 12px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

.login-form button:hover {
    background: #764ba2;
}

.error {
    background: #ffebee;
    color: #c62828;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 1rem;
    text-align: center;
}

.navbar {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h2 {
    color: white;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    margin-left: 1.5rem;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-menu a:hover {
    background: #34495e;
}

.container {
    padding: 2rem;
    min-height: calc(100vh - 120px);
}

.footer {
    background: #34495e;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-card h3 {
    color: #666;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: #2c3e50;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

table th, table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

table th {
    background: #f8f9fa;
    font-weight: 600;
}

table tr:hover {
    background: #f8f9fa;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary { background: #3498db; }
.btn-success { background: #27ae60; }
.btn-danger { background: #e74c3c; }
.btn-warning { background: #f39c12; }

.btn:hover {
    opacity: 0.9;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 1.5rem;
}

.card-header {
    border-bottom: 1px solid #eee;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
}