Initial commit

src/components/ui/Banner.tsx

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+import styled from "styled-components";
+
+export const Banner = styled.div`
+	padding: 8px;
+    font-size: 14px;
+    text-align: center;
+
+    color: var(--accent);
+    background: var(--primary-background);
+`;

src/components/ui/Button.tsx

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+import styled, { css } from "styled-components";
+
+interface Props {
+    readonly contrast?: boolean;
+    readonly error?: boolean;
+};
+
+export const Button = styled.button<Props>`
+	z-index: 1;
+	padding: 8px;
+	font-size: 16px;
+	text-align: center;
+
+	transition: 0.2s ease opacity;
+	transition: 0.2s ease background-color;
+
+	background: var(--primary-background);
+    color: var(--foreground);
+
+	border-radius: 6px;
+	cursor: pointer;
+    border: none;
+
+	&:hover {
+		background: var(--secondary-header);
+	}
+
+    &:disabled {
+        background: var(--primary-background);
+    }
+
+    &:active {
+        background: var(--secondary-background);
+    }
+
+    ${props => props.contrast && css`
+        padding: 4px 8px;
+        background: var(--secondary-header);
+
+        &:hover {
+            background: var(--primary-header);
+        }
+
+        &:disabled {
+            background: var(--secondary-header);
+        }
+
+        &:active {
+            background: var(--secondary-background);
+        }
+    `}
+
+    ${props => props.error && css`
+        color: white;
+        background: var(--error);
+
+        &:hover {
+            filter: brightness(1.2)
+        }
+
+        &:disabled {
+            background: var(--error);
+        }
+    `}
+`;

src/components/ui/Checkbox.tsx

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+import { Check } from '@styled-icons/feather';
+import styled, { css } from 'styled-components';
+import { VNode } from 'preact';
+
+const CheckboxBase = styled.label`
+	gap: 4px;
+    z-index: 1;
+    padding: 4px;
+    display: flex;
+    border-radius: 4px;
+    align-items: center;
+
+    cursor: pointer;
+    font-size: 18px;
+    user-select: none;
+    
+    transition: .2s ease all;
+
+    p {
+        margin: 0;
+    }
+
+    input {
+        display: none;
+    }
+`;
+
+const CheckboxContent = styled.span`
+    flex-grow: 1;
+    display: flex;
+    font-size: 1rem;
+    font-weight: 600;
+    flex-direction: column;
+`;
+
+const CheckboxDescription = styled.span`
+    font-size: 0.8em;
+    font-weight: 400;
+    color: var(--secondary-foreground);
+`;
+
+const Checkmark = styled.div<{ checked: boolean }>`
+    margin: 4px;
+    width: 24px;
+    height: 24px;
+    display: grid;
+    border-radius: 4px;
+    place-items: center;
+    background: var(--secondary-background);
+
+    svg {
+        color: var(--secondary-background);
+        stroke-width: 2;
+    }
+
+    ${ props => props.checked && css`
+        background: var(--accent);
+    ` }
+`;
+
+interface Props {
+    checked: boolean;
+    disabled?: boolean;
+    className?: string;
+    children: VNode | string;
+    description?: VNode | string;
+    onChange: (state: boolean) => void;
+}
+
+export function Checkbox(props: Props) {
+    return (
+        <CheckboxBase disabled={props.disabled}>
+            <CheckboxContent>
+                <span>{ props.children }</span>
+                {props.description && (
+                    <CheckboxDescription>
+                        {props.description}
+                    </CheckboxDescription>
+                )}
+            </CheckboxContent>
+            <input
+                type="checkbox"
+                checked={props.checked}
+                onChange={() =>
+                    !props.disabled && props.onChange(!props.checked)
+                }
+            />
+            <Checkmark checked={props.checked}>
+                <Check size={20} />
+            </Checkmark>
+        </CheckboxBase>
+    )
+}

src/components/ui/ComboBox.tsx

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+import styled from "styled-components";
+
+export const ComboBox = styled.select`
+	padding: 8px;
+    border-radius: 2px;
+    color: var(--secondary-foreground);
+    background: var(--secondary-background);
+`;

src/components/ui/InputBox.tsx

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+import styled, { css } from "styled-components";
+
+interface Props {
+    readonly contrast?: boolean;
+};
+
+export const InputBox = styled.input<Props>`
+    z-index: 1;
+    padding: 8px 16px;
+    border-radius: 6px;
+    color: var(--foreground);
+    border: 2px solid transparent;
+    background: var(--primary-background);
+    transition: 0.2s ease background-color;
+    transition: border-color .2s ease-in-out;
+
+    &:hover {
+        background: var(--secondary-background);
+    }
+
+    &:focus {
+        border: 2px solid var(--accent);
+    }
+
+    ${ props => props.contrast && css`
+        color: var(--secondary-foreground);
+        background: var(--secondary-background);
+
+        &:hover {
+            background: var(--hover);
+        }
+    ` }
+`;