body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #f4f7fc;
}

.login-container {
    min-height: 100vh;
}

.login-card {
    width: 450px;
    border: none;
    border-radius: 18px;
    overflow: hidden;
    background: #ffffff;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.12);
}

.login-header {
    background: linear-gradient(135deg, #2563eb, #1e40af);
    padding: 30px;
    text-align: center;
    color: #ffffff;
}

.login-header h2 {
    margin: 0;
    font-weight: 700;
}

.login-header p {
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
}

.form-control {
    height: 52px;
    border-radius: 10px;
    border: 1px solid #d1d5db;
}

.form-control:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.15);
}

.login-btn {
    height: 52px;
    border-radius: 10px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border: none;
    color: #fff;
    font-weight: 600;
    transition: all 0.3s ease;
}

.login-btn:hover {
    background: linear-gradient(135deg, #1d4ed8, #1e3a8a);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.demo-box {
    background: #f8fafc;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 18px;
}

.demo-box h6 {
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 12px;
}

.demo-box p {
    margin-bottom: 6px;
    color: #6b7280;
    font-size: 14px;
}