Modal/Dialog is opening at the bottom of the screen, and not behaving properly

Like the question says, my dialog is popping up on the bottom of the screen, rather than in the middle. It also does not close on click, but rather whenever I hit escape. The rest of the page is also not disabled or grayed out, so I can stack them up (see below).

I'm using basically the exact same code as in the example

import {Component} from '@angular/core';
import {MdDialog, MdDialogRef} from '@angular/material';

@Component({
    selector: 'dialog-overview-example',
    template: '<button md-button (click)="openDialog()">Open dialog</button>'
})
export class DialogOverviewExample {
    constructor(public dialog: MdDialog) {}

    public openDialog(): void {
        this.dialog.open(BasicDialog);
    }
}

@Component({
    selector: 'dialog-overview-example-dialog',
    template: "<p> Hi, I'm a dialog! </p>",
})
export class BasicDialog {}

I think my imports are correct, but here they are:

imports: [
    BrowserModule,
    FormsModule,
    RouterModule.forRoot(ROUTES, {useHash: true}),
    MdDialogModule,
    BrowserAnimationsModule,
    ReactiveFormsModule,
    FormsModule,
    CommonModule
],

Note that there is no error or warning in the console, and I have tried disabling css.

Anyone seen this before?