:root { /* コンテンツ幅 */ --layout-width-inner: 1052px; /* フォント */ --ff-helve: Helvetica, "Open Sans", sans-serif; --ff-hiragino: "Hiragino UD Sans Std", "Noto Sans JP", serif; --ff-base: var(--ff-hiragino); --fw-base: 600; /* カラー */ --color-main: #000; --color-base: #FFF; } /*! kiso.css v1.2.1 | MIT License | https://github.com/tak-dcxi/kiso.css */ /* ====================================================== // MARK: Universal // ====================================================== */ *, ::before, ::after { /* * Includes `padding` and `border` in the element's specified dimensions. * It is highly recommended to set `box-sizing: border-box;` by default, as it makes styling much easier, especially when specifying `width: 100%;`. */ box-sizing: border-box; } /* ====================================================== // MARK: Document and Body Elements // ====================================================== */ :where(:root) { /* Remove space when punctuation marks are adjacent, and also remove leading spaces in a line. */ text-spacing-trim: trim-start; /* Improves readability by inserting a small space between Japanese and alphanumeric characters. */ text-autospace: normal; /* * Mobile browsers have an algorithm that automatically adjusts font sizes to prevent text from becoming too small. * This controls the auto-adjustment feature to prevent unwanted resizing. */ -webkit-text-size-adjust: 100%; text-size-adjust: 100%; /* Prevents layout shift caused by the appearance or disappearance of the scrollbar. */ scrollbar-gutter: stable; /* Suppresses the tap highlight on iOS. */ -webkit-tap-highlight-color: transparent; /* In Safari, if `font-family` is not specified, a serif font is applied by default, so `sans-serif` is set as the default here. */ font-family: sans-serif; /* Prevents misreading by applying strict line-breaking rules. */ line-break: strict; /* * For accessibility, it is recommended to set the `line-height` to at least 1.5 times the text size within paragraphs. * @see https://waic.jp/translations/WCAG21/#visual-presentation */ line-height: 1.5; /* Wraps English words mid-word. Specifying `anywhere` also prevents content from overflowing in layouts like `flex` or `grid`. */ overflow-wrap: anywhere; } :where(body) { /* The `margin` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset here. */ margin: unset; /* * When creating a sticky footer, a minimum height is often required. * Setting the `min-block-size` to the dynamic viewport height ensures enough space for the footer. */ min-block-size: 100dvb; } /* ====================================================== // MARK: Sections // ------------------------------------------------------ */ :where(h1, h2, h3, h4, h5, h6) { /* Prevents the last line of text from ending with a single word, which can look awkward (known as an orphan). */ text-wrap: pretty; } :where(h1) { font-size: 2em; /* * Adjusts user agent (UA) styles for `h1` elements within sectioning content. * This addresses DevTools warnings that appear when `h1` elements nested within sectioning content lack `font-size` and `margin` properties. * @see https://html.spec.whatwg.org/#sections-and-headings */ margin-block: 0.67em; } :where(h2, h3, h4, h5, h6) { /* The `margin-block` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset. */ margin-block: unset; } :where(search) { /* * The `` element is supported from Safari 17. * This prevents it from being displayed as an inline element in unsupported environments. */ display: block flow; } /* ====================================================== // MARK: Grouping content // ====================================================== */ :where(p, blockquote, figure, pre, address, ul, ol, dl, menu) { /* The `margin-block` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset. */ margin-block: unset; } :where(blockquote, figure) { /* The `margin-inline` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset. */ margin-inline: unset; } :where(p:lang(en)) { /* * In English, a single word on the last line is called a "widow" or "orphan" and is considered something to avoid as it makes the text harder to read. * Therefore, when lang="en", this prevents the last line from ending with a single word. */ text-wrap: pretty; } :where(address:lang(ja)) { /* Italic style is not common in Japanese, so the `font-style` is reset. */ font-style: unset; } :where(ul, ol, menu) { /* * In Safari, using `list-style: none` prevents screen readers from announcing lists. * `list-style-type: ""` is used to hide markers without affecting accessibility. * @see https://matuzo.at/blog/2023/removing-list-styles-without-affecting-semantics */ list-style-type: ""; /* The `padding-inline-start` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset. */ padding-inline-start: unset; } :where(dt) { /* It is common to display `
` elements in bold, so `font-weight: bolder;` is set by default. */ font-weight: bolder; } :where(dd) { /* The `margin-inline-start` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset. */ margin-inline-start: unset; } :where(pre) { /* * Since `text-spacing-trim` can affect spacing in `
` elements even with its initial value, the final rendering may depend on the user's font settings.
  * To ensure consistent alignment, `space-all` is explicitly specified and inheritance is prevented.
  */
  text-spacing-trim: space-all;

  /* Set to `no-autospace` as it can cause misalignment with monospaced fonts. */
  text-autospace: no-autospace;
}

/* ======================================================
//  MARK: Text-level semantics
// ====================================================== */

:where(em:lang(ja)) {
  /* In Japanese, emphasis is commonly represented by bold text, so `font-weight: bolder;` is set by default. */
  font-weight: bolder;
}

:where(:is(i, cite, em, dfn, var):lang(ja)) {
  /* Italic style is not common in Japanese, so the `font-style` is reset. */
  font-style: unset;
}

:where(code, kbd, samp) {

  /* Font feature settings can have adverse effects on monospaced fonts, so their values are explicitly set to `initial` to prevent inheritance. */
  font-feature-settings: initial;
  /*
  * Set a monospace font family referencing Tailwind.
  * @see https://tailwindcss.com/docs/font-family
  */
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;

  /* Resets the `font-size` specified in the UA stylesheet to allow inheritance. */
  font-size: unset;

  /*
  * Disables font ligatures for programming fonts (like Fira Code)
  * to prevent character combinations like `=>` from being rendered as a single symbol (e.g., `⇒`).
  */
  font-variant-ligatures: none;
  font-variation-settings: initial;
}

:where(abbr[title]) {
  cursor: help;
  /*
  * The `` element with the `title` attribute isn't helpful regarding accessibility because support is inconsistent, and it's only accessible to some users.
  * This rule shows a dotted underline on abbreviations in all browsers (there's a bug in Safari) and changes the cursor.
  * @see https://adrianroselli.com/2024/01/using-abbr-element-with-title-attribute.html
  */
  text-decoration-line: underline;
  text-decoration-style: dotted;
}

:where(time) {
  /* Set to `no-autospace` because date notations in typography do not include spaces. */
  text-autospace: no-autospace;
}

/* ======================================================
//  MARK: Links
// ====================================================== */

:where(a:any-link) {
  /* The default `color` from the UA stylesheet is rarely used as is, so it's reset to allow inheritance. */
  color: unset;

  /*
  * While link underlines can be useful, they are often obstructive.
  * They are disabled by default.
  * If needed, restore them using `text-decoration-line: revert;`.
  */
  text-decoration-line: unset;

  /* Set the underline thickness to the font's default thickness. */
  text-decoration-thickness: from-font;
}

/* ======================================================
//  MARK: Embedded content
// ====================================================== */

:where(img, svg, picture, video, canvas, model, audio, iframe, embed, object) {
  /* Automatically adjust block size based on content. */
  block-size: auto;

  /* Prevents overflow by setting the maximum width to `100%`. */
  max-inline-size: 100%;

  /* Prevents extra space from appearing at the bottom of the element. */
  vertical-align: bottom;
}

:where(iframe) {
  /* The `border` specified in the UA stylesheet is often unnecessary, so it is reset. */
  border: unset;
}

/* ======================================================
//  MARK: Tabular data
// ====================================================== */

:where(table) {
  /* Collapse borders for a more refined table design. */
  border-collapse: collapse;
}

:where(caption, th) {
  /* The `text-align` specified in the UA stylesheet is often unnecessary, so it is reset. */
  text-align: unset;
}

:where(caption) {
  /* Prevents the last line of text from ending with a single word, which can look awkward (known as an orphan). */
  text-wrap: pretty;
}

/* ======================================================
//  MARK: Forms
// ====================================================== */

:where(button, input, select, textarea),
::file-selector-button {

  /* These styles specified in the UA stylesheet are often unnecessary, so they are reset to allow for inheritance. */
  border-color: unset;
  border-radius: unset;
  border-style: solid;
  /*
  * These elements are often styled with a border, so a `1px` border is applied by default for consistency.
  * This ensures readability even for unstyled elements.
  * When resetting, it's recommended to use `border-color: transparent` instead of `border: none` to account for forced color modes.
  */
  border-width: 1px;
  color: unset;
  font: unset;
  letter-spacing: unset;
  text-align: unset;
}

:where(input:is([type="radio" i], [type="checkbox" i])) {
  /* The `margin` specified in the User Agent (UA) stylesheet is often unnecessary, so it is reset here. */
  margin: unset;
}

:where(input[type="file" i]) {
  /* The `border` is often unnecessary, so it is reset here. */
  border: unset;
}

:where(input[type="search" i]) {
  /* Remove the rounded corners of search inputs on macOS and normalize the background color. */
  -webkit-appearance: textfield;
}

@supports (-webkit-touch-callout: none) {
  :where(input[type="search" i]) {
    /* normalize the background color on iOS. */
    background-color: Canvas;
  }
}

:where(input:is([type="tel" i],
    [type="url" i],
    [type="email" i],
    [type="number" i]):not(:placeholder-shown)) {
  /*
  * Certain input types need to maintain left alignment even in right-to-left (RTL) languages.
  * However, this only applies when the value is not empty, as the placeholder should be right-aligned.
  * @see https://rtlstyling.com/posts/rtl-styling#form-inputs
  */
  direction: ltr;
}

:where(textarea) {
  /* The `margin-block` specified in Firefox's UA stylesheet is often unnecessary, so it is reset. */
  margin-block: unset;

  /* Allows vertical resizing for `