$calendar-width currently ignores the configured gap and padding, so the calendar width will not be "exactly 7 columns + 10px paddings" as required. Update this calculation to use $day-squere-width, $calendar-gap-width, and padding values so all repeated sizes are derived from variables.

get-correction uses $n - 1 directly as a pixel offset, which violates the requirement to avoid hardcoded px-like values and makes the spacing logic independent of $calendar-gap-width. Consider computing this based on $day-squere-width and $calendar-gap-width instead.

The task requires the main styles to be written in src/styles/main.scss, and the linked stylesheet should correspond to that entry; pointing to styles/index.scss instead of styles/main.scss (or the compiled CSS entry) conflicts with the description. Consider linking the same SCSS file that the description names as the main one.

$calendar-width must represent width for 7 day squares plus gaps and paddings, and the task requires reusing variables instead of magic numbers; 6px here ignores $calendar-gap-width and padding variables and will not automatically follow if those values change.

@for $i from 28 to 31 in Sass excludes 31 because to is upper-bound exclusive; this means no calendar--month-length-31 rule is generated, violating the requirement that changing month-length (including 31) changes the layout.

The margin calculation ($n - 1) * $day-squere-width + $n - 1 hardcodes the 1px gap ($n - 1) instead of using $calendar-gap-width, and does not factor in padding; this goes against the requirement to avoid repeated hardcoded px values and to base such calculations on variables.

Padding is hardcoded as 10px while the task explicitly mentions paddings in the calendar width requirement and asks to avoid repeated hardcoded values using variables; consider extracting this into a padding variable and incorporating it into $calendar-width.

padding: 10px; repeats a hardcoded px value instead of using a named variable and is not reflected in $calendar-width. This breaks the requirement to avoid repeated magic px values and to make all calculations clear with variables (checklist item #4). Consider creating $calendar-padding and using it both here and in the width formula.

This violates checklist item #1: "Changing 'month-lengh' and 'start-day' modifier in the code element reflects in changing calendar layout" and the description requirement "Use flex with 1px gap and limit its width to exactly 7 columns + 10px paddings". $calendar-width only accounts for day widths and gaps, but not the 10px left/right paddings, and there is no padding variable used in the width calculation.

This still conflicts with checklist item #1 and #4: start-day alignment must use the same variable-based layout logic (including padding/gap) and avoid implicit repeated px-based offsets. get-correction ignores padding and any border influence, so the first-day margin-left is not derived from a full calendar-width formula that includes padding.

This calendar width ignores the 10px paddings below and only accounts for 7 squares and 6 gaps; also the 10px padding is a repeated magic value. This violates the requirement to have "exactly 7 columns + 10px paddings" computed via variables and breaks checklist items about changing layout via modifiers and avoiding hardcoded px used several times. Consider introducing a $calendar-padding variable and including 2 * $calendar-padding in $calendar-width, then using that variable for padding instead of a raw 10px.

Using a hardcoded 10px padding here without a variable means the actual visual width is wider than $calendar-width and repeats the same pixel value, which conflicts with the requirement to avoid hardcoded px values used multiple times and to calculate the calendar width including paddings via variables.

This @for uses from 28 to 31, which in Sass generates rules for 28, 29, and 30 only. There will be no rule for &--month-length-31, so changing the month-length-31 modifier in HTML does not affect layout as required by the task and checklist. Use through 31 to include 31 in the generated modifiers.

This still uses a hardcoded 10px instead of a padding variable included in the width calculation. It violates the requirement that the calendar width be fully computed via variables (7 columns + 10px paddings) and the previous HIGH‑priority correction to introduce $calendar-padding, include 2 * $calendar-padding in $calendar-width, and reuse that variable here.

Yes, it is, but it's only once in whole file, the task has nothing to do with it. It says:
" - Don't use hardcoded px values if they are used several times"

Counting Callendar width with padding is stupidity and wrong in SCSS / CSS planing..

The calendar width calculation still does not include the left/right paddings, and padding: 10px; uses a hardcoded magic value. This violates the previous HIGH requirement and the generalized requirement that $calendar-width must include paddings and that padding should be driven by a $calendar-padding variable, not repeated literals (ties into checklist item #1 and the “no hardcoded px values used several times” rule).

Leaving a personal, argumentative comment in the source is not appropriate for the task and code style expectations. It’s better to remove this and instead align the implementation with the documented requirements (using a $calendar-padding variable and including it in $calendar-width).