style.css

/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */

html {
    line-height: 1.15;

    -webkit-text-size-adjust: 100%;

}



/**
   * Remove the margin in all browsers.
   */

body {
    margin: 0;
}

/**
   * Render the `main` element consistently in IE.
   */

main {
    display: block;
}

/**
   * Correct the font size and margin on `h1` elements within `section` and
   * `article` contexts in Chrome, Firefox, and Safari.
   */

h1 {
    font-size: 2em;
    margin: 0.67em 0;
}



/**
   * 1. Add the correct box sizing in Firefox.
   * 2. Show the overflow in Edge and IE.
   */

hr {
    box-sizing: content-box;

    height: 0;

    overflow: visible;

}

/**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

pre {
    font-family: monospace, monospace;

    font-size: 1em;

}



/**
   * Remove the gray background on active links in IE 10.
   */

a {
    background-color: transparent;
}

/**
   * 1. Remove the bottom border in Chrome 57-
   * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
   */

abbr[title] {
    border-bottom: none;

    text-decoration: underline;

    -webkit-text-decoration: underline dotted;

    text-decoration: underline dotted;

}

/**
   * Add the correct font weight in Chrome, Edge, and Safari.
   */

b,
strong {
    font-weight: bolder;
}

/**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

code,
kbd,
samp {
    font-family: monospace, monospace;

    font-size: 1em;

}

/**
   * Add the correct font size in all browsers.
   */

small {
    font-size: 80%;
}

/**
   * Prevent `sub` and `sup` elements from affecting the line height in
   * all browsers.
   */

sub,
sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sub {
    bottom: -0.25em;
}

sup {
    top: -0.5em;
}



/**
   * Remove the border on images inside links in IE 10.
   */

img {
    border-style: none;
}



/**
   * 1. Change the font styles in all browsers.
   * 2. Remove the margin in Firefox and Safari.
   */

button,
input,
optgroup,
select,
textarea {
    font-family: inherit;

    font-size: 100%;

    line-height: 1.15;

    margin: 0;

}

/**
   * Show the overflow in IE.
   * 1. Show the overflow in Edge.
   */

button,
input {

    overflow: visible;
}

/**
   * Remove the inheritance of text transform in Edge, Firefox, and IE.
   * 1. Remove the inheritance of text transform in Firefox.
   */

button,
select {

    text-transform: none;
}

/**
   * Correct the inability to style clickable types in iOS and Safari.
   */

button,
[type="button"],
[type="reset"],
[type="submit"] {
    -webkit-appearance: button;
}

/**
   * Remove the inner border and padding in Firefox.
   */

button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
    border-style: none;
    padding: 0;
}

/**
   * Restore the focus styles unset by the previous rule.
   */

button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
    outline: 1px dotted ButtonText;
}

/**
   * Correct the padding in Firefox.
   */

fieldset {
    padding: 0.35em 0.75em 0.625em;
}

/**
   * 1. Correct the text wrapping in Edge and IE.
   * 2. Correct the color inheritance from `fieldset` elements in IE.
   * 3. Remove the padding so developers are not caught out when they zero out
   *    `fieldset` elements in all browsers.
   */

legend {
    box-sizing: border-box;

    color: inherit;

    display: table;

    max-width: 100%;

    padding: 0;

    white-space: normal;

}

/**
   * Add the correct vertical alignment in Chrome, Firefox, and Opera.
   */

progress {
    vertical-align: baseline;
}

/**
   * Remove the default vertical scrollbar in IE 10+.
   */

textarea {
    overflow: auto;
}

/**
   * 1. Add the correct box sizing in IE 10.
   * 2. Remove the padding in IE 10.
   */

[type="checkbox"],
[type="radio"] {
    box-sizing: border-box;

    padding: 0;

}

/**
   * Correct the cursor style of increment and decrement buttons in Chrome.
   */

[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
    height: auto;
}

/**
   * 1. Correct the odd appearance in Chrome and Safari.
   * 2. Correct the outline style in Safari.
   */

[type="search"] {
    -webkit-appearance: textfield;

    outline-offset: -2px;

}

/**
   * Remove the inner padding in Chrome and Safari on macOS.
   */

[type="search"]::-webkit-search-decoration {
    -webkit-appearance: none;
}

/**
   * 1. Correct the inability to style clickable types in iOS and Safari.
   * 2. Change font properties to `inherit` in Safari.
   */

::-webkit-file-upload-button {
    -webkit-appearance: button;

    font: inherit;

}





details {
    display: block;
}



summary {
    display: list-item;
}



/**
   * Add the correct display in IE 10+.
   */

template {
    display: none;
}

/**
   * Add the correct display in IE 10.
   */

[hidden] {
    display: none;
}

:root {
    --board-line: #023047;
    --sym-base: #219ebc;
    --sym-win: #ffb703;
    --base-background: white;
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--base-background);
}

main {
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

input[type='checkbox'] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    position: fixed;
}

.board {
    background: var(--board-line);
    width: 100vw;
    max-width: 500px;
    height: 100vw;
    max-height: 500px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 10px;
}

.board>div,
label {
    width: 100%;
    height: 100%;
    background: var(--base-background);
}

.board>div {
    position: relative;
}

label {
    display: inline-block;
    z-index: 21;
}

label[for^="d1"] {
    z-index: 30;
}

label[for^="d2"] {
    z-index: 29;
}

label[for^="d3"] {
    z-index: 28;
}

label[for^="d4"] {
    z-index: 27;
}

label[for^="d5"] {
    z-index: 26;
}

label[for^="d6"] {
    z-index: 25;
}

label[for^="d7"] {
    z-index: 24;
}

label[for^="d8"] {
    z-index: 23;
}

label[for^="d9"] {
    z-index: 22;
}

label,
.cross,
.round {
    position: absolute;
}

.cross,
.round {
    width: 100%;
    height: 100%;
    z-index: 10;
    padding: 10%;
}


.cross>svg,
.round>svg {
    fill: var(--sym-base);
}


aside {
    width: 100vw;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    display: none;
}





/* Disable Disk Layer */

input[id^="d1"]:checked~main label[for^="d1"] {
    display: none;
}

input[id^="d2"]:checked~main label[for^="d2"] {
    display: none;
}

input[id^="d3"]:checked~main label[for^="d3"] {
    display: none;
}

input[id^="d4"]:checked~main label[for^="d4"] {
    display: none;
}

input[id^="d5"]:checked~main label[for^="d5"] {
    display: none;
}

input[id^="d6"]:checked~main label[for^="d6"] {
    display: none;
}

input[id^="d7"]:checked~main label[for^="d7"] {
    display: none;
}

input[id^="d8"]:checked~main label[for^="d8"] {
    display: none;
}

input[id^="d9"]:checked~main label[for^="d9"] {
    display: none;
}




/* Activate Chosen Tile */

input[id$="t1c"]:checked~main .tile1>.cross {
    z-index: 100;
}

input[id$="t1r"]:checked~main .tile1>.round {
    z-index: 100;
}

input[id$="t2c"]:checked~main .tile2>.cross {
    z-index: 100;
}

input[id$="t2r"]:checked~main .tile2>.round {
    z-index: 100;
}

input[id$="t3c"]:checked~main .tile3>.cross {
    z-index: 100;
}

input[id$="t3r"]:checked~main .tile3>.round {
    z-index: 100;
}

input[id$="t4c"]:checked~main .tile4>.cross {
    z-index: 100;
}

input[id$="t4r"]:checked~main .tile4>.round {
    z-index: 100;
}

input[id$="t5c"]:checked~main .tile5>.cross {
    z-index: 100;
}

input[id$="t5r"]:checked~main .tile5>.round {
    z-index: 100;
}

input[id$="t6c"]:checked~main .tile6>.cross {
    z-index: 100;
}

input[id$="t6r"]:checked~main .tile6>.round {
    z-index: 100;
}

input[id$="t7c"]:checked~main .tile7>.cross {
    z-index: 100;
}

input[id$="t7r"]:checked~main .tile7>.round {
    z-index: 100;
}

input[id$="t8c"]:checked~main .tile8>.cross {
    z-index: 100;
}

input[id$="t8r"]:checked~main .tile8>.round {
    z-index: 100;
}

input[id$="t9c"]:checked~main .tile9>.cross {
    z-index: 100;
}

input[id$="t9r"]:checked~main .tile9>.round {
    z-index: 100;
}




/* Winner */


/* For Cross  */
input[id$="t1c"]:checked~input[id$="t2c"]:checked~input[id$="t3c"]:checked~main .tile1 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t2c"]:checked~input[id$="t3c"]:checked~main .tile2 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t2c"]:checked~input[id$="t3c"]:checked~main .tile3 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t2c"]:checked~input[id$="t3c"]:checked~aside {
    display: block;
}



input[id$="t4c"]:checked~input[id$="t5c"]:checked~input[id$="t6c"]:checked~main .tile4 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t4c"]:checked~input[id$="t5c"]:checked~input[id$="t6c"]:checked~main .tile5 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t4c"]:checked~input[id$="t5c"]:checked~input[id$="t6c"]:checked~main .tile6 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t4c"]:checked~input[id$="t5c"]:checked~input[id$="t6c"]:checked~aside {
    display: block;
}



input[id$="t7c"]:checked~input[id$="t8c"]:checked~input[id$="t9c"]:checked~main .tile7 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t7c"]:checked~input[id$="t8c"]:checked~input[id$="t9c"]:checked~main .tile8 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t7c"]:checked~input[id$="t8c"]:checked~input[id$="t9c"]:checked~main .tile9 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t7c"]:checked~input[id$="t8c"]:checked~input[id$="t9c"]:checked~aside {
    display: block;
}



input[id$="t1c"]:checked~input[id$="t4c"]:checked~input[id$="t7c"]:checked~main .tile1 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t4c"]:checked~input[id$="t7c"]:checked~main .tile4 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t4c"]:checked~input[id$="t7c"]:checked~main .tile7 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t4c"]:checked~input[id$="t7c"]:checked~aside {
    display: block;
}



input[id$="t2c"]:checked~input[id$="t5c"]:checked~input[id$="t8c"]:checked~main .tile2 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t2c"]:checked~input[id$="t5c"]:checked~input[id$="t8c"]:checked~main .tile5 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t2c"]:checked~input[id$="t5c"]:checked~input[id$="t8c"]:checked~main .tile8 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t2c"]:checked~input[id$="t5c"]:checked~input[id$="t8c"]:checked~aside {
    display: block;
}


input[id$="t3c"]:checked~input[id$="t6c"]:checked~input[id$="t9c"]:checked~main .tile3 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t6c"]:checked~input[id$="t9c"]:checked~main .tile6 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t6c"]:checked~input[id$="t9c"]:checked~main .tile9 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t6c"]:checked~input[id$="t9c"]:checked~aside {
    display: block;
}



input[id$="t1c"]:checked~input[id$="t5c"]:checked~input[id$="t9c"]:checked~main .tile1 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t5c"]:checked~input[id$="t9c"]:checked~main .tile5 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t5c"]:checked~input[id$="t9c"]:checked~main .tile9 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t1c"]:checked~input[id$="t5c"]:checked~input[id$="t9c"]:checked~aside {
    display: block;
}



input[id$="t3c"]:checked~input[id$="t5c"]:checked~input[id$="t7c"]:checked~main .tile3 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t5c"]:checked~input[id$="t7c"]:checked~main .tile5 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t5c"]:checked~input[id$="t7c"]:checked~main .tile7 .cross>svg {
    fill: var(--sym-win);
}

input[id$="t3c"]:checked~input[id$="t5c"]:checked~input[id$="t7c"]:checked~aside {
    display: block;
}




/* For Round  */
input[id$="t1r"]:checked~input[id$="t2r"]:checked~input[id$="t3r"]:checked~main .tile1 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t2r"]:checked~input[id$="t3r"]:checked~main .tile2 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t2r"]:checked~input[id$="t3r"]:checked~main .tile3 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t2r"]:checked~input[id$="t3r"]:checked~aside {
    display: block;
}



input[id$="t4r"]:checked~input[id$="t5r"]:checked~input[id$="t6r"]:checked~main .tile4 .round>svg {
    fill: var(--sym-win);
}

input[id$="t4r"]:checked~input[id$="t5r"]:checked~input[id$="t6r"]:checked~main .tile5 .round>svg {
    fill: var(--sym-win);
}

input[id$="t4r"]:checked~input[id$="t5r"]:checked~input[id$="t6r"]:checked~main .tile6 .round>svg {
    fill: var(--sym-win);
}

input[id$="t4r"]:checked~input[id$="t5r"]:checked~input[id$="t6r"]:checked~aside {
    display: block;
}



input[id$="t7r"]:checked~input[id$="t8r"]:checked~input[id$="t9r"]:checked~main .tile7 .round>svg {
    fill: var(--sym-win);
}

input[id$="t7r"]:checked~input[id$="t8r"]:checked~input[id$="t9r"]:checked~main .tile8 .round>svg {
    fill: var(--sym-win);
}

input[id$="t7r"]:checked~input[id$="t8r"]:checked~input[id$="t9r"]:checked~main .tile9 .round>svg {
    fill: var(--sym-win);
}

input[id$="t7r"]:checked~input[id$="t8r"]:checked~input[id$="t9r"]:checked~aside {
    display: block;
}



input[id$="t1r"]:checked~input[id$="t4r"]:checked~input[id$="t7r"]:checked~main .tile1 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t4r"]:checked~input[id$="t7r"]:checked~main .tile4 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t4r"]:checked~input[id$="t7r"]:checked~main .tile7 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t4r"]:checked~input[id$="t7r"]:checked~aside {
    display: block;
}



input[id$="t2r"]:checked~input[id$="t5r"]:checked~input[id$="t8r"]:checked~main .tile2 .round>svg {
    fill: var(--sym-win);
}

input[id$="t2r"]:checked~input[id$="t5r"]:checked~input[id$="t8r"]:checked~main .tile5 .round>svg {
    fill: var(--sym-win);
}

input[id$="t2r"]:checked~input[id$="t5r"]:checked~input[id$="t8r"]:checked~main .tile8 .round>svg {
    fill: var(--sym-win);
}

input[id$="t2r"]:checked~input[id$="t5r"]:checked~input[id$="t8r"]:checked~aside {
    display: block;
}


input[id$="t3r"]:checked~input[id$="t6r"]:checked~input[id$="t9r"]:checked~main .tile3 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t6r"]:checked~input[id$="t9r"]:checked~main .tile6 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t6r"]:checked~input[id$="t9r"]:checked~main .tile9 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t6r"]:checked~input[id$="t9r"]:checked~aside {
    display: block;
}



input[id$="t1r"]:checked~input[id$="t5r"]:checked~input[id$="t9r"]:checked~main .tile1 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t5r"]:checked~input[id$="t9r"]:checked~main .tile5 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t5r"]:checked~input[id$="t9r"]:checked~main .tile9 .round>svg {
    fill: var(--sym-win);
}

input[id$="t1r"]:checked~input[id$="t5r"]:checked~input[id$="t9r"]:checked~aside {
    display: block;
}



input[id$="t3r"]:checked~input[id$="t5r"]:checked~input[id$="t7r"]:checked~main .tile3 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t5r"]:checked~input[id$="t7r"]:checked~main .tile5 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t5r"]:checked~input[id$="t7r"]:checked~main .tile7 .round>svg {
    fill: var(--sym-win);
}

input[id$="t3r"]:checked~input[id$="t5r"]:checked~input[id$="t7r"]:checked~aside {
    display: block;
}