:root {
    --button-border-width: 1px;
    --button-background-color-default: var(--white-color);
    --button-background-color-primary: var(--primary-color);
    --button-background-color-secondary: var(--secondary-color);
    --button-background-color-success: var(--green-color);
    --button-background-color-warning: var(--yellow-color);
    --button-background-color-error: var(--red-color);
    --button-background-color-information: var(--blue-color);
    --button-background-color-disabled: var(--disabled-color);

    --link-color: var(--text-color);
    --link-color-hover: var(--link-color);

    --link-color-inverse: var(--text-color-inverse);
    --link-color-hover-inverse: var(--link-color-inverse);
}

.button {
    border: var(--button-border-width) solid var(--border-color);
    background-color: var(--button-background-color-default);
    color: var(--text-color);
    padding: var(--spacing-small) var(--spacing-medium);
    border-radius: var(--border-radius);
    font-size: var(--font-size-medium);
    display: inline-block;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease,
                color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                opacity var(--transition-speed) ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    box-sizing: border-box;
}

.button:hover,
.button:focus {
    outline: none;
}

.button.primary {
    background-color: var(--button-background-color-primary);
    border-color: var(--button-background-color-primary);
    color: var(--text-color-inverse);
}

.button.secondary {
    background-color: var(--button-background-color-secondary);
    border-color: var(--button-background-color-secondary);
    color: var(--text-color-inverse);
}

.button.success {
    background-color: var(--button-background-color-success);
    border-color: var(--button-background-color-success);
    color: var(--text-color-inverse);
}

.button.warning {
    background-color: var(--button-background-color-warning);
    border-color: var(--button-background-color-warning);
    color: var(--text-color-inverse);
}

.button.error {
    background-color: var(--button-background-color-error);
    border-color: var(--button-background-color-error);
    color: var(--text-color-inverse);
}

.button.information {
    background-color: var(--button-background-color-information);
    border-color: var(--button-background-color-information);
    color: var(--text-color-inverse);
}

.button.disabled {
    background-color: var(--button-background-color-disabled);
    border-color: var(--button-background-color-disabled);
    color: var(--text-color-inverse);
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease, text-decoration-color var(--transition-speed) ease;
}

.link-inverse {
    color: var(--link-color-inverse);
}

a:hover,
a:focus {
    text-decoration-color: var(--link-color-hover);
    color: var(--link-color-hover);
    text-decoration: underline;
    outline: none;
}

a:active {
    color: var(--link-color-hover);
}

a:visited {
    color: var(--link-color);
}

.link-inverse:hover,
.link-inverse:focus {
    text-decoration-color: var(--link-color-hover-inverse);
    color: var(--link-color-hover-inverse);
}

.link-inverse:active {
    color: var(--link-color-hover-inverse);
}

.link-inverse:visited {
    color: var(--link-color-inverse);
}