body {
    background: #f5f7fb;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont;
    color: #1f2937;
}

.login-box {
    max-width: 420px;
    margin: 80px auto;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,.08);
    padding: 30px;
}

.login-box h3 {
    font-weight: 600;
    margin-bottom: 20px;
}

.form-control {
    border-radius: 8px;
    padding: 10px 12px;
}

.btn-primary {
    background: #2563eb;
    border: none;
    border-radius: 8px;
    padding: 10px;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.navbar {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.card {
    border-radius: 12px;
    border: none;
    box-shadow: 0 6px 18px rgba(0,0,0,.06);
}

.card-header {
    background: #f9fafb;
    font-weight: 600;
}

.text-muted {
    font-size: 14px;
}