/* 基本設定：デザイントークンと文書全体の標準スタイル */
/* サイト全体で共有する色・文字・余白・動きの設計値 */
:root {
  color-scheme: light;

  /* ブランドカラー：ロゴの色を加工せず基本値として保持する */
  --color-brand-green: #12af68;
  --color-brand-green-strong: #087847;
  --color-brand-green-deep: #055b36;
  --color-brand-green-soft: #e7f8ef;
  --color-brand-aqua: #5cb6b6;
  --color-brand-aqua-strong: #2c7373;
  --color-brand-aqua-deep: #205858;
  --color-brand-aqua-soft: #eaf7f7;
  --color-brand-ink: #20362f;
  --color-brand-gray: #585657;
  --color-brand-gold: #c8a669;
  --color-brand-gold-strong: #795b25;
  --color-brand-gold-soft: #fbf5e8;

  /* 背景面と本文に使うニュートラルカラー */
  --color-white: #ffffff;
  --color-bg: #f7faf8;
  --color-bg-soft: #f1f7f4;
  --color-surface: #ffffff;
  --color-surface-raised: #ffffff;
  --color-surface-green: var(--color-brand-green-soft);
  --color-surface-aqua: var(--color-brand-aqua-soft);
  --color-surface-warm: var(--color-brand-gold-soft);
  --color-heading: var(--color-brand-ink);
  --color-text: #294038;
  --color-text-muted: #50635c;
  --color-text-subtle: #65756f;
  --color-text-inverse: #ffffff;
  --color-line: #d8e4de;
  --color-line-strong: #b9cec4;
  --color-control-border: #7d958a;
  --color-overlay: rgb(17 42 33 / 62%);

  /* 十分なコントラストを持つ操作色（ロゴの緑は装飾にも使用） */
  --color-primary: var(--color-brand-green-strong);
  --color-primary-hover: #06663b;
  --color-primary-active: var(--color-brand-green-deep);
  --color-primary-soft: var(--color-brand-green-soft);
  --color-on-primary: var(--color-white);
  --color-accent: var(--color-brand-aqua-strong);
  --color-accent-hover: var(--color-brand-aqua-deep);
  --color-link: #087347;
  --color-link-hover: var(--color-brand-green-deep);
  --color-focus: #087847;
  --color-focus-ring: rgb(18 175 104 / 28%);
  --color-focus-inverse: #dff9eb;
  --color-focus-ring-inverse: rgb(223 249 235 / 28%);

  /* 状態表示：文字色と淡い背景色を対で管理する */
  --color-success: #087443;
  --color-success-bg: #e8f8ef;
  --color-success-line: #8ed7b2;
  --color-info: #175b9e;
  --color-info-bg: #ebf5ff;
  --color-info-line: #9fc9ee;
  --color-warning: #6c4800;
  --color-warning-bg: #fff7df;
  --color-warning-line: #e4c36d;
  --color-danger: #a52a23;
  --color-danger-bg: #fff0ee;
  --color-danger-line: #e8aaa5;

  /* 文字 */
  --font-sans:
    "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
    "YuGothic", "Meiryo", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: var(--font-sans);
  --font-mono:
    "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: clamp(1rem, 0.975rem + 0.12vw, 1.0625rem);
  --font-size-md: clamp(1.0625rem, 1.025rem + 0.18vw, 1.1875rem);
  --font-size-lg: clamp(1.1875rem, 1.1rem + 0.42vw, 1.5rem);
  --font-size-xl: clamp(1.5rem, 1.3rem + 0.9vw, 2.125rem);
  --font-size-2xl: clamp(1.875rem, 1.52rem + 1.55vw, 3rem);
  --font-size-3xl: clamp(2.25rem, 1.65rem + 2.6vw, 4.25rem);
  --line-height-tight: 1.3;
  --line-height-heading: 1.45;
  --line-height-body: 1.85;
  --line-height-loose: 2;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.06em;
  --letter-spacing-label: 0.1em;

  /* 余白 */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-28: 7rem;
  --space-32: 8rem;
  --section-space: clamp(4.5rem, 3.2rem + 5vw, 8rem);

  /* 形状 */
  --radius-xs: 0.5rem;
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;
  --radius-2xl: 2.25rem;
  --radius-pill: 9999px;
  --radius-round: 50%;

  /* 影と奥行き */
  --shadow-xs: 0 2px 8px rgb(26 64 49 / 5%);
  --shadow-sm: 0 10px 28px rgb(26 64 49 / 7%);
  --shadow-md: 0 18px 40px rgb(26 64 49 / 9%);
  --shadow-lg: 0 24px 56px rgb(26 64 49 / 11%);
  --shadow-focus: 0 0 0 4px var(--color-focus-ring);

  /* レイアウト */
  --container-gutter: clamp(1.25rem, 4vw, 2.5rem);
  --container-max: 75rem;
  --container-narrow: 47rem;
  --content-measure: 43rem;
  --header-height: 5.25rem;
  --control-height: 3rem;
  --tap-target: 2.75rem;

  /* 動き */
  --duration-fast: 140ms;
  --duration-normal: 240ms;
  --duration-slow: 420ms;
  --ease-standard: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.2, 0.8, 0.2, 1);
  --transition-colors:
    color var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard);
  --transition-transform: transform var(--duration-normal) var(--ease-emphasized);
  --transition-shadow: box-shadow var(--duration-normal) var(--ease-standard);

  /* 重なり順 */
  --z-base: 0;
  --z-raised: 10;
  --z-sticky: 100;
  --z-header: 200;
  --z-overlay: 800;
  --z-modal: 900;
  --z-toast: 1000;
  --z-skip-link: 1100;

  /* 共通のブランド表現 */
  --gradient-brand: linear-gradient(
    120deg,
    var(--color-brand-aqua) 0%,
    var(--color-brand-green) 58%,
    #79c85c 100%
  );
  --gradient-soft: linear-gradient(
    135deg,
    var(--color-brand-aqua-soft) 0%,
    var(--color-surface) 48%,
    var(--color-brand-green-soft) 100%
  );
  --gradient-shine: linear-gradient(
    110deg,
    var(--color-brand-aqua-strong) 0%,
    var(--color-brand-green-strong) 34%,
    #3f936d 48%,
    var(--color-brand-green-strong) 62%,
    var(--color-brand-aqua-strong) 100%
  );
  --gradient-prism: linear-gradient(
    135deg,
    #9fdedf 0%,
    #63bd9a 42%,
    #d9bf78 72%,
    #fff2bf 100%
  );
  --color-shine: #fff6cc;
  --color-shine-glow: rgb(219 193 118 / 32%);

  /* Editorial theme — large color fields and quiet, human-scale motion. */
  --color-editorial-paper: #f5eedc;
  --color-editorial-paper-light: #fbf7eb;
  --color-editorial-mint: #78cbb6;
  --color-editorial-mint-light: #bfe9dc;
  --color-editorial-mint-deep: #166c57;
  --color-editorial-yellow: #f0d96b;
  --color-editorial-ink: #24362f;
  --color-editorial-ink-soft: #425a51;
  --color-editorial-white: #fffdf7;
  --font-serif:
    "Yu Mincho", "Hiragino Mincho ProN", "Hiragino Mincho Pro", serif;
  --font-latin:
    "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --radius-editorial: clamp(1.5rem, 3vw, 3rem);
  --duration-reveal: 720ms;
  --ease-reveal: cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="step-forward"] {
  --color-primary: var(--color-brand-green-strong);
  --color-primary-hover: #06663b;
  --color-primary-active: var(--color-brand-green-deep);
  --color-accent: var(--color-brand-aqua-strong);
  --color-focus: var(--color-brand-green-strong);
  --color-focus-ring: rgb(18 175 104 / 28%);
}
/* リセット、文書全体、アクセシビリティに関わる基本スタイル */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-inline-size: 20rem;
  scroll-behavior: smooth;
  scroll-padding-block-start: var(--header-height);
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

html.menu-open {
  overflow: hidden;
}

body {
  min-block-size: 100vh;
  margin: 0;
  overflow-x: clip;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-break: strict;
  line-height: var(--line-height-body);
  overflow-wrap: break-word;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

#root {
  min-block-size: 100vh;
  min-block-size: 100dvh;
  isolation: isolate;
}

::selection {
  background: rgb(18 175 104 / 22%);
  color: var(--color-brand-ink);
}

:where(h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd) {
  margin-block: 0;
}

:where(h1, h2, h3, h4, h5, h6) {
  color: var(--color-heading);
  font-family: var(--font-display);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-heading);
  text-wrap: balance;
}

:where(p, li, dt, dd, label, summary) {
  line-break: strict;
  text-wrap: pretty;
  word-break: normal;
}

@supports (word-break: auto-phrase) {
  :where(h1, h2, h3, h4, h5, h6, p, li, dt, dd, label, summary) {
    word-break: auto-phrase;
  }
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

h5,
h6 {
  font-size: var(--font-size-md);
}

:where(ul, ol) {
  margin-block: 0;
  padding-inline-start: 1.35em;
}

:where(ul, ol)[role="list"] {
  padding-inline-start: 0;
  list-style: none;
}

:where(address) {
  font-style: normal;
}

:where(strong, b) {
  font-weight: var(--font-weight-bold);
}

:where(small) {
  font-size: var(--font-size-sm);
}

:where(hr) {
  block-size: 1px;
  margin-block: var(--space-8);
  border: 0;
  background: var(--color-line);
}

a {
  color: var(--color-link);
  text-decoration-line: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
  transition: var(--transition-colors);
}

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

:where(img, picture, video, canvas, svg) {
  display: block;
  max-inline-size: 100%;
}

:where(img, video) {
  block-size: auto;
}

:where(svg) {
  flex: none;
}

:where(button, input, select, textarea) {
  margin: 0;
  color: inherit;
  font: inherit;
}

:where(button, [type="button"], [type="reset"], [type="submit"]) {
  min-block-size: var(--tap-target);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  cursor: pointer;
  padding-inline: var(--space-4);
  touch-action: manipulation;
  transition:
    var(--transition-colors),
    var(--transition-shadow),
    var(--transition-transform);
}

:where(button, [type="button"], [type="reset"], [type="submit"]):hover {
  border-color: var(--color-primary);
}

:where(button, [type="button"], [type="reset"], [type="submit"]):active {
  transform: translateY(1px);
}

:where(button, input, select, textarea):disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

:where(
    input:not([type="button"]):not([type="reset"]):not([type="submit"]):not(
        [type="checkbox"]
      ):not([type="radio"]):not([type="range"]):not([type="color"]):not(
        [type="file"]
      ),
    select,
    textarea
  ) {
  inline-size: 100%;
  min-block-size: var(--control-height);
  border: 1px solid var(--color-control-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-3) var(--space-4);
  transition:
    var(--transition-colors),
    var(--transition-shadow);
}

:where(textarea) {
  min-block-size: 8rem;
  resize: vertical;
}

:where(input, textarea)::placeholder {
  color: var(--color-text-subtle);
  opacity: 1;
}

:where(input[type="checkbox"], input[type="radio"]) {
  accent-color: var(--color-primary);
}

:where(fieldset) {
  min-inline-size: 0;
  margin: 0;
  border: 0;
  padding: 0;
}

:where(label) {
  cursor: pointer;
}

:where(summary) {
  cursor: pointer;
}

:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  border-radius: max(var(--radius-xs), 0.2em);
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  box-shadow: var(--shadow-focus);
}

:where([hidden]) {
  display: none !important;
}

.skip-link {
  position: fixed;
  z-index: var(--z-skip-link);
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  min-block-size: var(--tap-target);
  border-radius: var(--radius-sm);
  background: var(--color-brand-ink);
  color: var(--color-white);
  display: inline-flex;
  align-items: center;
  padding-inline: var(--space-4);
  text-decoration: none;
  transform: translateY(calc(-100% - var(--space-6)));
  transition: var(--transition-transform);
}

.skip-link:focus-visible {
  color: var(--color-white);
  transform: translateY(0);
}

.container {
  inline-size: min(
    calc(100% - (var(--container-gutter) * 2)),
    var(--container-max)
  );
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space);
}

.jp-phrase {
  display: inline-block;
  white-space: nowrap;
}

.sr-only {
  position: absolute !important;
  inline-size: 1px !important;
  block-size: 1px !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  border: 0 !important;
  padding: 0 !important;
  white-space: nowrap !important;
}

@media (prefers-reduced-motion: reduce) {
  html:focus-within {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}