/*
 * News Creator shared design system
 * ---------------------------------
 * Audience: older adults, people with low vision, and people affected by glare.
 * Baseline: 20px text, 48px or larger controls, strong focus, warm low-glare
 * surfaces. Optional large (22px) and extra-large (26px) modes are applied to
 * the root element by assets/js/view-settings.js.
 *
 * Class map
 * - Foundations/utilities: .page-shell, .content-wrap, .stack, .cluster,
 *   .grid, .visually-hidden, .skip-link, .only-mobile, .only-desktop
 * - Site chrome: .site-header, .site-nav, .site-footer
 * - Feedback: .notice, .status-banner, .toast-region, .toast
 * - Components: .card, .button, .icon-button, .field, .choice,
 *   .dialog, .project-grid, .project-card, .stepper
 * - Editor: .editor-page, .editor-header, .editor-shell, .editor-sidebar,
 *   .editor-main, .editor-toolbar, .editor-panel, .editor-stage
 * - Mobile editor: .mobile-tabs, .mobile-tab, .mobile-view
 * - Preview: .a4-preview-wrapper, .a4-preview, .a4-preview-surface
 * - States: .is-selected, .is-current, .is-complete, .is-busy,
 *   [aria-current], [aria-pressed="true"], [aria-invalid="true"]
 *
 * Browser target: Chrome 109+. No selector relies on :has(). Viewport sizing
 * uses vh first and upgrades to dvh only when supported.
 */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */

:root {
  color-scheme: light;

  /* Warm, low-glare neutral palette. */
  --color-page: #f4f0e7;
  --color-page-deep: #e8e1d3;
  --color-surface: #fffdf7;
  --color-surface-soft: #f8f4eb;
  --color-surface-strong: #eee8dc;
  /* Compatibility aliases used by the landing and project page styles. */
  --color-bg: var(--color-page);
  --color-warm-soft: #efe4d2;

  /* #17201c and #3d4943 exceed 7:1 on page and surface backgrounds. */
  --color-text: #17201c;
  --color-text-muted: #3d4943;
  --color-placeholder: #59645e;
  --color-border: #5c6962;
  --color-border-strong: #35433c;

  --color-primary: #174f3a;
  --color-primary-hover: #0f3d2c;
  --color-primary-dark: var(--color-primary-hover);
  --color-primary-soft: #dcece6;
  /* Decorative large text stays at least 3:1 on every light surface mode. */
  --color-primary-decorative: #708a80;
  --color-primary-text: #fffdf7;
  --color-accent: #f2c14e;
  --color-accent-soft: #fff0bd;
  --color-accent-text: #17201c;
  --color-highlight-text: #7a2718;
  --color-link: #004f9e;
  --color-link-hover: #003c78;
  --color-focus: #004f9e;

  --color-success: #1f5a3b;
  --color-success-bg: #e3f2e8;
  --color-warning: #6d4100;
  --color-warning-bg: #fff0c7;
  --color-danger: #812121;
  --color-danger-bg: #fbe7e4;
  --color-info: #174f72;
  --color-info-bg: #e5f0f6;

  --color-disabled-bg: #ded9ce;
  --color-disabled-text: #4a514d;

  --font-sans: "Hiragino Sans", "Yu Gothic", "YuGothic", "Meiryo", system-ui,
    -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-base: 1rem;
  --font-size-small: 0.8889rem; /* 16px at the 18px root. */
  --font-size-large: 1.1111rem; /* 20px. */
  --font-size-xl: clamp(1.3333rem, 1.1rem + 1vw, 1.7778rem);
  --font-size-hero: clamp(1.7778rem, 1.35rem + 2vw, 2.6667rem);
  --line-height-body: 1.72;
  --line-height-heading: 1.35;

  --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;

  --radius-small: 0.5rem;
  --radius-medium: 0.75rem;
  --radius-large: 1rem;
  --radius-pill: 999px;

  --target-min: 2.6667rem; /* 53px in the standard 20px view. */
  --content-wide: 80rem;
  --content-reading: 46rem;
  --sidebar-width: 23rem;
  --header-height: 4.5rem;
  --focus-width: 4px;
  --focus-offset: 3px;

  --shadow-card: 0 2px 0 rgba(23, 32, 28, 0.14),
    0 8px 24px rgba(23, 32, 28, 0.08);
  --shadow-dialog: 0 18px 48px rgba(23, 32, 28, 0.24);

  --motion-fast: 140ms;
  --motion-normal: 220ms;
  --motion-ease: cubic-bezier(0.2, 0, 0, 1);
}

/* --------------------------------------------------------------------------
   2. Reset and readable defaults
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  min-height: 100%;
  font-size: 125%; /* Standard view setting: 20px on a 16px browser default. */
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--color-text);
  background: var(--color-page);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: var(--line-height-body);
  overflow-wrap: anywhere;
}

.preference-sync-warning {
  position: fixed;
  z-index: 120;
  right: 1rem;
  bottom: 1rem;
  width: min(calc(100% - 2rem), 30rem);
  margin: 0;
  box-shadow: var(--shadow-dialog);
}

.toast-region .preference-sync-warning {
  position: static;
  width: 100%;
  margin: 0;
}

@supports (min-height: 100dvh) {
  body {
    min-height: 100dvh;
  }
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

img {
  height: auto;
}

button,
input,
select,
textarea {
  max-width: 100%;
  color: inherit;
  font: inherit;
}

button,
[type="button"],
[type="submit"],
[type="reset"] {
  touch-action: manipulation;
}

h1,
h2,
h3,
h4 {
  margin-block: 0 0.65em;
  color: var(--color-text);
  font-weight: 800;
  line-height: var(--line-height-heading);
  overflow-wrap: break-word;
}

h1 {
  font-size: var(--font-size-hero);
}

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

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

p,
ul,
ol,
dl,
figure,
blockquote {
  margin-block: 0 1em;
}

ul,
ol {
  padding-inline-start: 1.45em;
}

li + li {
  margin-block-start: 0.4em;
}

a {
  color: var(--color-link);
  font-weight: 700;
  text-decoration-line: underline;
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.18em;
}

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

.brand-name-compact {
  display: none;
}

hr {
  height: 0;
  margin-block: var(--space-8);
  border: 0;
  border-top: 2px solid var(--color-border);
}

::selection {
  color: var(--color-accent-text);
  background: var(--color-accent);
}

::placeholder {
  color: var(--color-placeholder);
  opacity: 1;
}

[hidden] {
  display: none !important;
}

:focus {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: var(--focus-offset);
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: var(--focus-width) solid var(--color-focus);
  outline-offset: var(--focus-offset);
}

/* --------------------------------------------------------------------------
   3. Layout and utilities
   -------------------------------------------------------------------------- */

.page-shell {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

@supports (min-height: 100dvh) {
  .page-shell {
    min-height: 100dvh;
  }
}

.page-shell > main {
  flex: 1 0 auto;
}

.content-wrap {
  width: min(calc(100% - 2rem), var(--content-wide));
  margin-inline: auto;
}

.reading-width {
  max-width: var(--content-reading);
}

.section {
  padding-block: clamp(2rem, 1.4rem + 2vw, 4.5rem);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--stack-space, var(--space-4));
}

.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--cluster-space, var(--space-3));
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: var(--grid-space, var(--space-5));
}

.surface {
  color: var(--color-text);
  background: var(--color-surface);
}

.muted {
  color: var(--color-text-muted);
}

.text-large {
  font-size: var(--font-size-large);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 10000;
  min-height: var(--target-min);
  padding: 0.65rem 1rem;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border: 3px solid var(--color-surface);
  border-radius: var(--radius-small);
  font-weight: 800;
  transform: translateY(calc(-100% - 2rem));
  transition: transform var(--motion-fast) var(--motion-ease);
}

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

.only-mobile {
  display: none !important;
}

/* --------------------------------------------------------------------------
   4. Header and footer
   -------------------------------------------------------------------------- */

.site-header {
  position: relative;
  z-index: 100;
  color: var(--color-text);
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-3);
}

.site-brand {
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-size: var(--font-size-large);
  font-weight: 900;
  line-height: 1.3;
  text-decoration: none;
}

.site-brand__mark {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 auto;
  place-items: center;
  color: var(--color-accent-text);
  background: var(--color-accent);
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-small);
  font-weight: 900;
}

.site-brand__mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.site-nav,
.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.site-nav__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  padding-inline: var(--space-3);
  border-radius: var(--radius-small);
}

.site-nav a[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-accent-soft);
  box-shadow: inset 0 -4px 0 var(--color-border-strong);
  text-decoration-thickness: 0.16em;
}

.site-footer {
  margin-block-start: auto;
  padding-block: var(--space-8);
  color: var(--color-text);
  background: var(--color-surface-strong);
  border-top: 2px solid var(--color-border);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-6);
  align-items: start;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-5);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__note {
  max-width: 48rem;
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

/* --------------------------------------------------------------------------
   5. Buttons and state indicators
   -------------------------------------------------------------------------- */

.button,
.icon-button {
  appearance: none;
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin: 0;
  padding: 0.65rem 1.15rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-border-strong);
  border-radius: var(--radius-medium);
  box-shadow: 0 3px 0 var(--color-border-strong);
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--motion-fast) var(--motion-ease),
    border-color var(--motion-fast) var(--motion-ease),
    box-shadow var(--motion-fast) var(--motion-ease),
    transform var(--motion-fast) var(--motion-ease);
}

.button--primary {
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-color: var(--color-primary-hover);
  box-shadow: 0 3px 0 var(--color-primary-hover);
}

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

.button--accent {
  color: var(--color-accent-text);
  background: var(--color-accent);
  border-color: var(--color-border-strong);
}

.button--quiet {
  color: var(--color-text);
  background: var(--color-surface-strong);
}

.button--danger {
  color: var(--color-primary-text);
  background: var(--color-danger);
  border-color: #5f1111;
  box-shadow: 0 3px 0 #5f1111;
}

.button--large {
  min-height: 3.5rem;
  padding-inline: 1.4rem;
  font-size: var(--font-size-large);
}

.button--block {
  width: 100%;
}

.icon-button {
  width: var(--target-min);
  padding: 0;
  flex: 0 0 var(--target-min);
}

@media (hover: hover) and (pointer: fine) {
  .button:hover,
  .icon-button:hover {
    color: var(--color-text);
    background: var(--color-accent-soft);
    transform: translateY(-1px);
  }

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

  .button--danger:hover {
    color: var(--color-primary-text);
    background: #681515;
  }
}

.button:active,
.icon-button:active {
  box-shadow: 0 1px 0 var(--color-border-strong);
  transform: translateY(2px);
}

.button:disabled,
.button[aria-disabled="true"],
.icon-button:disabled,
.icon-button[aria-disabled="true"] {
  color: var(--color-disabled-text);
  background: var(--color-disabled-bg);
  border-color: var(--color-border);
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.is-selected,
[aria-pressed="true"] {
  color: var(--color-text);
  background: var(--color-accent-soft);
  border-color: var(--color-border-strong);
  box-shadow: inset 0 0 0 3px var(--color-border-strong),
    0 3px 0 var(--color-border-strong);
}

.button.is-selected::after,
.icon-button.is-selected::after,
.button[aria-pressed="true"]::after,
.icon-button[aria-pressed="true"]::after {
  content: "\2713  選択中";
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.45rem;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 900;
  line-height: 1.5;
}

.is-busy {
  cursor: progress;
}

.is-busy::after {
  content: "処理中";
  font-size: var(--font-size-small);
  font-weight: 800;
}

/* --------------------------------------------------------------------------
   6. Cards, notices, and status
   -------------------------------------------------------------------------- */

.card {
  padding: clamp(1rem, 0.75rem + 1vw, 1.75rem);
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-card);
}

.card--flat {
  box-shadow: none;
}

.card__header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-block-end: var(--space-4);
}

.card__title {
  margin: 0;
}

.card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-start: var(--space-5);
}

.notice,
.status-banner {
  position: relative;
  margin: 0;
  padding: 0.9rem 1rem 0.9rem 3rem;
  color: var(--color-text);
  background: var(--color-info-bg);
  border: 2px solid var(--color-info);
  border-left-width: 0.55rem;
  border-radius: var(--radius-medium);
  font-weight: 700;
  line-height: 1.6;
}

.notice::before,
.status-banner::before {
  content: "i";
  position: absolute;
  top: 0.85rem;
  left: 0.9rem;
  display: grid;
  width: 1.45rem;
  height: 1.45rem;
  place-items: center;
  color: var(--color-primary-text);
  background: var(--color-info);
  border-radius: 50%;
  font-size: 0.9rem;
  font-weight: 900;
  line-height: 1;
}

.notice--success,
.status-banner--success {
  background: var(--color-success-bg);
  border-color: var(--color-success);
}

.notice--success::before,
.status-banner--success::before {
  content: "\2713";
  background: var(--color-success);
}

.notice--warning,
.status-banner--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

.notice--warning::before,
.status-banner--warning::before {
  content: "!";
  background: var(--color-warning);
}

.notice--danger,
.status-banner--danger {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
}

.notice--danger::before,
.status-banner--danger::before {
  content: "!";
  background: var(--color-danger);
}

/* Pair the region with aria-live="polite"; use role="alert" only for errors. */
.toast-region {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 9000;
  display: grid;
  width: min(28rem, calc(100% - 2rem));
  max-height: calc(100dvh - 2rem - env(safe-area-inset-bottom));
  gap: var(--space-3);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  pointer-events: none;
}

.toast {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: center;
  min-height: 4rem;
  padding: var(--space-3);
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-info);
  border-radius: var(--radius-medium);
  box-shadow: var(--shadow-dialog);
  font-weight: 700;
  pointer-events: auto;
  transform-origin: right bottom;
  animation: toast-enter 220ms cubic-bezier(.2, .8, .2, 1) both;
}

.toast.is-leaving {
  pointer-events: none;
  animation: toast-exit 180ms ease-in both;
}

@keyframes toast-enter {
  from { opacity: 0; transform: translateY(1rem) scale(.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toast-exit {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(.65rem) scale(.98); }
}

.toast::before {
  content: "i\00a0 お知らせ";
  display: grid;
  min-width: 2rem;
  min-height: 2rem;
  padding: 0.12rem 0.5rem;
  place-items: center;
  color: var(--color-primary-text);
  background: var(--color-info);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 900;
  line-height: 1.35;
  white-space: nowrap;
}

.toast--info,
.toast[data-tone="info"] {
  border-color: var(--color-info);
}

.toast--info::before,
.toast[data-tone="info"]::before {
  content: "i\00a0 お知らせ";
  background: var(--color-info);
}

.toast--success,
.toast[data-tone="success"] {
  border-color: var(--color-success);
}

.toast--success::before,
.toast[data-tone="success"]::before {
  content: "\2713\00a0 完了";
  background: var(--color-success);
}

.toast--warning,
.toast[data-tone="warning"] {
  border-color: var(--color-warning);
}

.toast--warning::before,
.toast[data-tone="warning"]::before {
  content: "!\00a0 注意";
  background: var(--color-warning);
}

.toast--danger,
.toast[data-tone="danger"] {
  border-color: var(--color-danger);
}

.toast--danger::before,
.toast[data-tone="danger"]::before {
  content: "\00d7\00a0 エラー";
  background: var(--color-danger);
}

.toast__message {
  margin: 0;
}

.toast__tone-label {
  display: inline-flex;
  min-height: 1.75rem;
  align-items: center;
  padding-inline: 0.55rem;
  color: var(--color-primary-text);
  background: var(--color-info);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 900;
}

.toast[data-tone="success"] .toast__tone-label {
  background: var(--color-success);
}

.toast[data-tone="warning"] .toast__tone-label {
  background: var(--color-warning);
}

.toast[data-tone="danger"] .toast__tone-label {
  background: var(--color-danger);
}

.toast__close {
  align-self: start;
}

/* --------------------------------------------------------------------------
   7. Forms and choices
   -------------------------------------------------------------------------- */

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.field {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.field--full {
  grid-column: 1 / -1;
}

.field-label,
.fieldset-legend {
  color: var(--color-text);
  font-weight: 800;
  line-height: 1.5;
}

.field-required {
  display: inline-block;
  margin-inline-start: var(--space-2);
  padding: 0.05rem 0.45rem;
  color: var(--color-primary-text);
  background: var(--color-danger);
  border-radius: var(--radius-small);
  font-size: var(--font-size-small);
  font-weight: 900;
  vertical-align: 0.1em;
}

.input,
.select,
.textarea {
  width: 100%;
  min-height: var(--target-min);
  padding: 0.65rem 0.8rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius-small);
  line-height: 1.5;
}

.textarea {
  min-height: 10rem;
  resize: vertical;
}

.input:hover,
.select:hover,
.textarea:hover {
  border-color: var(--color-border-strong);
}

.input:focus,
.select:focus,
.textarea:focus,
.input:focus-visible,
.select:focus-visible,
.textarea:focus-visible {
  border-color: var(--color-focus);
}

.input[aria-invalid="true"],
.select[aria-invalid="true"],
.textarea[aria-invalid="true"] {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
  box-shadow: inset 0 0 0 1px var(--color-danger);
}

.field-help,
.field-count {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.field-error {
  position: relative;
  margin: 0;
  padding-inline-start: 1.55rem;
  color: var(--color-danger);
  font-weight: 800;
  line-height: 1.6;
}

.field-error::before {
  content: "!";
  position: absolute;
  top: 0.15em;
  left: 0;
  display: grid;
  width: 1.2rem;
  height: 1.2rem;
  place-items: center;
  color: var(--color-primary-text);
  background: var(--color-danger);
  border-radius: 50%;
  font-size: 0.75rem;
  line-height: 1;
}

.fieldset {
  min-width: 0;
  margin: 0;
  padding: var(--space-4);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-medium);
}

.fieldset-legend {
  padding-inline: var(--space-2);
}

.choice-list {
  display: grid;
  gap: var(--space-3);
}

.choice {
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr);
  gap: var(--space-3);
  align-items: center;
  min-height: var(--target-min);
  padding: 0.65rem 0.75rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-small);
  font-weight: 700;
  cursor: pointer;
}

.choice--selected,
.choice[aria-checked="true"] {
  background: var(--color-accent-soft);
  border-width: 3px;
  border-color: var(--color-border-strong);
  box-shadow: inset 0 0 0 2px var(--color-border-strong);
}

.choice input[type="checkbox"],
.choice input[type="radio"],
.checkbox,
.radio {
  width: 1.75rem;
  height: 1.75rem;
  margin: 0;
  accent-color: var(--color-primary);
}

.choice > span {
  min-width: 0;
}

.choice > span > strong,
.choice > span > small {
  display: block;
  min-width: 0;
  white-space: normal;
  overflow-wrap: anywhere;
}

.choice__description,
.choice > span > small {
  display: block;
  margin-block-start: 0.15rem;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  font-weight: 600;
  line-height: 1.55;
}

/* --------------------------------------------------------------------------
   8. Dialogs
   -------------------------------------------------------------------------- */

/* Prefer <dialog>; a div fallback needs role="dialog" and aria-modal="true". */
.dialog {
  width: min(44rem, calc(100% - 2rem));
  max-width: 100%;
  max-height: calc(100vh - 2rem);
  margin: auto;
  padding: 0;
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-border-strong);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-dialog);
  overflow: auto;
}

@supports (max-height: calc(100dvh - 2rem)) {
  .dialog {
    max-height: calc(100dvh - 2rem);
  }
}

dialog.dialog:not([open]) {
  display: none;
}

.dialog::backdrop {
  background: rgba(23, 32, 28, 0.72);
}

.dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 8000;
  display: grid;
  padding: var(--space-4);
  place-items: center;
  background: rgba(23, 32, 28, 0.72);
  overflow: auto;
}

.dialog-backdrop > .dialog {
  position: relative;
  z-index: 1;
}

.dialog__header,
.dialog__body,
.dialog__actions {
  padding-inline: clamp(1rem, 0.65rem + 2vw, 2rem);
}

.dialog__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: clamp(1rem, 0.75rem + 1vw, 1.5rem);
  border-bottom: 2px solid var(--color-border);
}

.dialog__title {
  margin: 0;
  font-size: var(--font-size-xl);
}

.dialog__body {
  padding-block: var(--space-5);
}

.dialog__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-3);
  padding-block: var(--space-4);
  background: var(--color-surface-soft);
  border-top: 2px solid var(--color-border);
}

.dialog--danger {
  border-color: var(--color-danger);
}

.dialog--danger .dialog__header {
  background: var(--color-danger-bg);
  border-bottom-color: var(--color-danger);
}

/* --------------------------------------------------------------------------
   9. Project cards
   -------------------------------------------------------------------------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: var(--space-5);
}

.project-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 15rem;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5);
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-border);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-card);
}

.project-card[aria-current="true"],
.project-card.is-selected {
  background: var(--color-accent-soft);
  border-color: var(--color-border-strong);
  box-shadow: inset 0 0 0 2px var(--color-border-strong), var(--shadow-card);
}

.project-card[aria-current="true"]::before,
.project-card.is-selected::before {
  content: "\2713  選択中";
  align-self: flex-start;
  padding: 0.15rem 0.6rem;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 900;
}

.project-card--new {
  border-style: dashed;
  border-width: 3px;
}

.project-card__title {
  margin: 0;
  font-size: 1.2222rem;
}

.project-card__meta {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.project-card__summary {
  margin: 0;
}

.project-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-block-start: auto;
  padding-block-start: var(--space-3);
}

/* --------------------------------------------------------------------------
   10. Four-step progress indicator
   -------------------------------------------------------------------------- */

.stepper {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  counter-reset: step;
  list-style: none;
}

.stepper__item {
  position: relative;
  display: grid;
  min-width: 0;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: var(--space-2);
  align-items: center;
  min-height: 3.5rem;
  padding: var(--space-2);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-medium);
  counter-increment: step;
  font-size: var(--font-size-small);
  font-weight: 800;
  line-height: 1.35;
}

.stepper__item::before {
  content: counter(step);
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  color: var(--color-text);
  background: var(--color-surface-strong);
  border: 2px solid var(--color-border-strong);
  border-radius: 50%;
  font-weight: 900;
}

.stepper__item.is-current,
.stepper__item[aria-current="step"] {
  color: var(--color-text);
  background: var(--color-accent-soft);
  border-width: 3px;
  border-color: var(--color-border-strong);
}

.stepper__item.is-current::before,
.stepper__item[aria-current="step"]::before {
  color: var(--color-primary-text);
  background: var(--color-primary);
}

.stepper__item.is-current::after,
.stepper__item[aria-current="step"]::after {
  content: "現在";
  position: absolute;
  top: -0.75rem;
  right: var(--space-2);
  padding: 0.05rem 0.45rem;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 900;
}

.stepper__item.is-complete::before {
  content: "\2713";
  color: var(--color-primary-text);
  background: var(--color-success);
}

/* --------------------------------------------------------------------------
   11. Editor shell and toolbar
   -------------------------------------------------------------------------- */

.editor-page {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  background: var(--color-page);
}

@supports (min-height: 100dvh) {
  .editor-page {
    min-height: 100dvh;
  }
}

.editor-header {
  position: sticky;
  top: 0;
  z-index: 300;
  display: flex;
  min-height: var(--header-height);
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) clamp(1rem, 0.5rem + 2vw, 2rem);
  color: var(--color-text);
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

.editor-header__title {
  margin: 0;
  font-size: clamp(1.2222rem, 1.05rem + 0.7vw, 1.5556rem);
}

.editor-save-state {
  display: inline-flex;
  min-height: var(--target-min);
  align-items: center;
  gap: var(--space-2);
  padding: 0.45rem 0.75rem;
  color: var(--color-text);
  background: var(--color-success-bg);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 800;
}

.editor-save-state::before {
  content: "\2713";
  font-weight: 900;
}

.editor-save-state--unsaved {
  background: var(--color-warning-bg);
  border-color: var(--color-warning);
}

.editor-save-state--unsaved::before {
  content: "!";
}

.editor-save-state--error {
  background: var(--color-danger-bg);
  border-color: var(--color-danger);
}

.editor-save-state--error::before {
  content: "!";
}

.editor-shell {
  display: grid;
  min-height: 0;
  flex: 1 1 auto;
  grid-template-columns: minmax(18rem, var(--sidebar-width)) minmax(0, 1fr);
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-4);
}

.editor-sidebar,
.editor-main {
  min-width: 0;
  min-height: 0;
}

.editor-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.editor-main {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: var(--space-3);
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-large);
}

.editor-toolbar__primary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.editor-toolbar__secondary {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-inline-start: auto;
}

.editor-panel {
  min-width: 0;
  padding: var(--space-4);
  color: var(--color-text);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-large);
}

.editor-panel__title {
  margin: 0 0 var(--space-3);
  font-size: 1.2222rem;
}

.editor-status {
  position: sticky;
  bottom: 0;
  z-index: 10;
}

.editor-stage {
  min-width: 0;
  min-height: 28rem;
  padding: clamp(0.75rem, 0.5rem + 1vw, 1.5rem);
  background: var(--color-page-deep);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-large);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

.editor-stage:focus-within {
  border-color: var(--color-focus);
}

/* --------------------------------------------------------------------------
   12. Mobile editor tabs and views
   -------------------------------------------------------------------------- */

.mobile-tabs {
  display: none;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-medium);
}

/* JS must keep aria-selected, tabindex, and the matching panel's hidden state in sync. */
.mobile-tab {
  appearance: none;
  min-height: var(--target-min);
  padding: 0.6rem 0.75rem;
  color: var(--color-text);
  background: var(--color-surface-strong);
  border: 3px solid var(--color-border);
  border-radius: var(--radius-small);
  font-weight: 800;
  cursor: pointer;
}

.mobile-tab[aria-pressed="true"] {
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-color: var(--color-primary-hover);
  box-shadow: inset 0 -4px 0 var(--color-accent);
}

.mobile-tab[aria-pressed="true"]::before {
  content: "\2713  ";
}

.mobile-view {
  min-width: 0;
}

/* --------------------------------------------------------------------------
   13. A4 preview wrapper (the dedicated renderer owns print dimensions)
   -------------------------------------------------------------------------- */

.a4-preview-wrapper {
  --a4-screen-width: 44.1111rem; /* About 794px at the 18px root. */
  display: grid;
  min-width: 0;
  min-height: 20rem;
  place-items: start center;
  padding: clamp(0.75rem, 0.5rem + 1vw, 1.5rem);
  background: #d8d2c6;
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-medium);
  overflow: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
  -webkit-overflow-scrolling: touch;
}

.a4-preview {
  position: relative;
  width: min(100%, var(--a4-screen-width));
  aspect-ratio: 210 / 297;
  flex: 0 0 auto;
  color: #111713;
  background: #fffefa;
  border: 2px solid #35433c;
  box-shadow: 0 4px 16px rgba(23, 32, 28, 0.2);
  overflow: hidden;
}

.a4-preview--landscape {
  width: min(100%, 62.3889rem); /* About 1123px at the 18px root. */
  aspect-ratio: 297 / 210;
}

.a4-preview-surface {
  position: absolute;
  inset: 0;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.a4-preview__empty {
  display: grid;
  min-height: 100%;
  place-items: center;
  padding: var(--space-5);
  color: #35433c;
  background: #f8f5ed;
  border: 3px dashed #5c6962;
  font-weight: 800;
  text-align: center;
}

.a4-preview-wrapper--fit-width .a4-preview {
  width: 100%;
}

/* --------------------------------------------------------------------------
   14. Responsive breakpoints
   -------------------------------------------------------------------------- */

/* 1024px and below: one-column editor; controls remain full-featured. */
@media (max-width: 1024px) {
  .content-wrap {
    width: min(calc(100% - 1.5rem), var(--content-wide));
  }

  .editor-shell {
    grid-template-columns: minmax(0, 1fr);
  }

  .editor-sidebar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .editor-sidebar > :first-child,
  .editor-sidebar > .editor-status {
    grid-column: 1 / -1;
  }

  .editor-main {
    min-height: 40rem;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }
}

/* 768px and below: dedicated input/preview switch for the editor. */
@media (max-width: 768px) {
  :root {
    --header-height: 4rem;
  }

  .only-mobile {
    display: block !important;
  }

  .only-mobile.cluster {
    display: flex !important;
  }

  .only-mobile.button,
  .only-mobile.icon-button {
    display: inline-flex !important;
  }

  .only-mobile.grid,
  .only-mobile.mobile-tabs {
    display: grid !important;
  }

  .only-desktop {
    display: none !important;
  }

  .site-header__inner,
  .editor-header {
    align-items: stretch;
  }

  .editor-header {
    position: relative;
  }

  .site-header__inner {
    flex-direction: column;
  }

  .site-nav,
  .site-nav__list {
    width: 100%;
  }

  .site-nav__list > li,
  .site-nav__list a {
    flex: 1 1 auto;
  }

  .form-grid,
  .editor-sidebar {
    grid-template-columns: minmax(0, 1fr);
  }

  .editor-sidebar > :first-child,
  .editor-sidebar > .editor-status {
    grid-column: auto;
  }

  .stepper {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .mobile-tabs {
    position: sticky;
    top: 0;
    z-index: 250;
    display: grid;
  }

  .editor-shell {
    padding: var(--space-3);
  }

  .editor-main {
    min-height: 32rem;
  }

  .editor-toolbar__secondary {
    width: 100%;
    margin-inline-start: 0;
  }

  .dialog__actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .dialog__actions .button {
    width: 100%;
  }

  .a4-preview-wrapper {
    min-height: 24rem;
    padding: var(--space-2);
  }
}

/* 480px and below: single-column project/actions and compact chrome. */
@media (max-width: 480px) {
  .content-wrap {
    width: min(calc(100% - 1rem), var(--content-wide));
  }

  .section {
    padding-block: var(--space-8);
  }

  .site-header__inner,
  .editor-header {
    padding-inline: var(--space-3);
  }

  .site-nav__list {
    display: grid;
    grid-template-columns: 1fr;
  }

  .project-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .card__actions,
  .project-card__actions,
  .editor-toolbar,
  .editor-toolbar__primary,
  .editor-toolbar__secondary {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    width: 100%;
  }

  .card__actions .button,
  .project-card__actions .button,
  .editor-toolbar .button {
    width: 100%;
  }

  .toast-region {
    right: 0.5rem;
    bottom: max(0.5rem, env(safe-area-inset-bottom));
    width: calc(100% - 1rem);
  }

  .toast {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
    gap: 12px;
    padding: 12px;
  }

  .toast::before {
    grid-row: 1;
    grid-column: 1;
    justify-self: start;
  }

  .toast__message {
    grid-row: 2;
    grid-column: 1 / -1;
    overflow-wrap: anywhere;
    line-height: 1.45;
  }

  .toast__close {
    grid-row: 1;
    grid-column: 2;
    width: 56px;
    min-height: 56px;
    flex-basis: 56px;
  }

  .dialog,
  .dialog-backdrop {
    width: 100%;
  }

  .dialog-backdrop {
    padding: var(--space-2);
  }

  .dialog__header {
    padding-inline: var(--space-3);
  }

  .a4-preview-wrapper {
    border-radius: var(--radius-small);
  }
}

@media (max-width: 430px) {
  .brand-name-full {
    display: none;
  }

  .brand-name-compact {
    display: inline;
  }
}

/* 390px and below: remains usable at 400% zoom on a 1560px display. */
@media (max-width: 390px) {
  :root {
    --space-5: 1rem;
    --space-6: 1.25rem;
    --space-8: 1.5rem;
  }

  html,
  body {
    min-width: 0;
  }

  .stepper {
    grid-template-columns: minmax(0, 1fr);
  }

  .stepper__item {
    min-height: var(--target-min);
  }

  .mobile-tabs {
    grid-template-columns: minmax(0, 1fr);
    position: static;
  }

  .editor-shell {
    padding: var(--space-2);
  }

  .editor-panel,
  .card,
  .project-card {
    padding: var(--space-3);
  }

  .notice,
  .status-banner {
    padding-inline-end: var(--space-3);
  }
}

/* Larger screens: grow whitespace, never reduce text or targets. */
@media (min-width: 1280px) {
  .editor-shell {
    gap: var(--space-5);
    padding: var(--space-5);
  }

  .project-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1440px) {
  :root {
    --content-wide: 86rem;
    --sidebar-width: 24rem;
  }

  .editor-stage {
    min-height: 42rem;
  }
}

@media (min-width: 1920px) {
  :root {
    --content-wide: 104rem;
    --sidebar-width: 26rem;
  }

  .project-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .editor-shell {
    max-width: 116rem;
    margin-inline: auto;
  }
}

/* Short landscape screens: protect the editing and dialog controls. */
@media (orientation: landscape) and (max-height: 600px) {
  :root {
    --header-height: 3.5rem;
  }

  .editor-header {
    position: relative;
    min-height: 3.5rem;
    padding-block: var(--space-2);
  }

  .mobile-tabs {
    position: static;
  }

  .dialog {
    max-height: calc(100vh - 1rem);
  }

  .editor-stage,
  .a4-preview-wrapper {
    min-height: 18rem;
  }
}

@supports (max-height: calc(100dvh - 1rem)) {
  @media (orientation: landscape) and (max-height: 600px) {
    .dialog {
      max-height: calc(100dvh - 1rem);
    }
  }
}

/* Coarse pointers receive an additional safety margin above the 48px base. */
@media (pointer: coarse) {
  :root {
    --target-min: 3rem; /* 60px in the standard 20px view. */
  }

  .button,
  .icon-button,
  .mobile-tab,
  .input,
  .select,
  .choice {
    min-height: var(--target-min);
  }
}

/* --------------------------------------------------------------------------
   15. View settings for older adults and people affected by glare
   -------------------------------------------------------------------------- */

html[data-view-size="standard"],
html.view-size-standard {
  font-size: 125%; /* 20px */
}

html[data-view-size="large"],
html.view-size-large {
  font-size: 137.5%; /* 22px */
}

html[data-view-size="extra-large"],
html.view-size-extra-large {
  font-size: 162.5%; /* 26px */
}

/* The first-visit choice changes information density without using age as a
   label. Text-size controls remain available inside both modes. */
html[data-audience="modern"][data-view-size="standard"] {
  font-size: 112.5%; /* 18px */
  --target-min: 2.6667rem; /* 48px */
}

html[data-audience="modern"][data-view-size="large"] {
  font-size: 125%; /* 20px */
  --target-min: 2.6rem; /* 52px */
}

html[data-audience="modern"][data-view-size="extra-large"] {
  font-size: 137.5%; /* 22px */
  --target-min: 2.5455rem; /* 56px */
}

html[data-audience="senior"] {
  --target-min: 3rem; /* 60px at the standard 20px size */
}

html[data-audience="senior"] [data-editor-mode-toggle] {
  display: none;
}

html[data-view-glare="reduced"],
html.view-glare-reduced {
  --color-page: #ddd4c3;
  --color-page-deep: #cec3b0;
  --color-surface: #eee7d9;
  --color-surface-soft: #e6dece;
  --color-surface-strong: #d8cebd;
  --color-text: #17201c;
  --color-text-muted: #343f39;
  --color-placeholder: #414c46;
  --color-border: #4b5851;
  --color-warm-soft: #d8cebd;
  --color-primary-text: #eee7d9;
  --color-accent-soft: #e5d39a;
  --color-highlight-text: #6d2015;
  --color-link: #003d7a;
  --color-link-hover: #002d5b;
  --color-focus: #003d7a;
  --color-success: #16462e;
  --color-success-bg: #d3e0d4;
  --color-warning: #5b3500;
  --color-warning-bg: #e4d6aa;
  --color-danger: #6b1818;
  --color-danger-bg: #e2ceca;
  --color-info: #113f5c;
  --color-info-bg: #cedde3;
  --shadow-card: 0 2px 0 rgba(23, 32, 28, 0.2);
  --shadow-dialog: 0 10px 30px rgba(23, 32, 28, 0.25);
}

html[data-view-contrast="high"],
html.view-contrast-high {
  --color-page: #e7dfcf;
  --color-page-deep: #d8cdbb;
  --color-surface: #fffaf0;
  --color-surface-soft: #f4ecdc;
  --color-surface-strong: #ded3c0;
  --color-text: #0b120e;
  --color-text-muted: #28332d;
  --color-placeholder: #303c35;
  --color-border: #26312b;
  --color-border-strong: #111915;
  --color-primary: #123f2e;
  --color-primary-hover: #092d20;
  --color-primary-dark: var(--color-primary-hover);
  --color-primary-soft: #cadbd1;
  --color-primary-text: #fffaf0;
  --color-link: #003d7a;
  --color-link-hover: #002d5b;
  --color-focus: #003d7a;
  --focus-width: 5px;
  --shadow-card: none;
  --shadow-dialog: 0 0 0 4px #111915;
}

html[data-view-glare="reduced"][data-view-contrast="high"],
html.view-glare-reduced.view-contrast-high {
  --color-page: #d8cfbd;
  --color-page-deep: #c9bda9;
  --color-surface: #eee7d9;
  --color-surface-soft: #e4dccb;
  --color-surface-strong: #d4c9b6;
  --color-primary-text: #eee7d9;
}

html[data-view-contrast="high"] .card,
html[data-view-contrast="high"] .project-card,
html[data-view-contrast="high"] .editor-panel,
html[data-view-contrast="high"] .editor-toolbar,
html[data-view-contrast="high"] .dialog,
html[data-view-contrast="high"] .input,
html[data-view-contrast="high"] .select,
html[data-view-contrast="high"] .textarea,
html.view-contrast-high .card,
html.view-contrast-high .project-card,
html.view-contrast-high .editor-panel,
html.view-contrast-high .editor-toolbar,
html.view-contrast-high .dialog,
html.view-contrast-high .input,
html.view-contrast-high .select,
html.view-contrast-high .textarea {
  border-width: 3px;
  box-shadow: none;
}

/* These pages contain a few legacy literal-white surfaces. Override them for
   the optional glare mode. The canvas filter is visual only and never changes
   its pixels or the exported PDF. */
html[data-view-glare="reduced"] .consent-banner,
html[data-view-glare="reduced"] .status-panel,
html[data-view-glare="reduced"] .sample-paper,
html[data-view-glare="reduced"] .sample-article,
html[data-view-glare="reduced"] .visual-note,
html[data-view-glare="reduced"] .template-mini,
html.view-glare-reduced .consent-banner,
html.view-glare-reduced .status-panel,
html.view-glare-reduced .sample-paper,
html.view-glare-reduced .sample-article,
html.view-glare-reduced .visual-note,
html.view-glare-reduced .template-mini {
  color: var(--color-text);
  background: var(--color-surface);
}

html[data-view-glare="reduced"] .site-footer,
html[data-view-glare="reduced"] .site-footer a,
html[data-view-glare="reduced"] .site-footer .link-button,
html[data-view-glare="reduced"] .steps-section,
html[data-view-glare="reduced"] .steps-section .eyebrow,
html.view-glare-reduced .site-footer,
html.view-glare-reduced .site-footer a,
html.view-glare-reduced .site-footer .link-button,
html.view-glare-reduced .steps-section,
html.view-glare-reduced .steps-section .eyebrow {
  color: var(--color-primary-text);
}

html[data-view-glare="reduced"] .steps-list li > span,
html.view-glare-reduced .steps-list li > span {
  background: var(--color-surface);
}

html[data-view-glare="reduced"] .a4-preview,
html.view-glare-reduced .a4-preview {
  filter: brightness(0.9) sepia(0.05);
}

.view-settings-trigger {
  min-height: var(--target-min);
  white-space: normal;
}

.view-settings-panel {
  position: fixed;
  z-index: 9500;
  top: max(0.5rem, env(safe-area-inset-top));
  right: max(0.5rem, env(safe-area-inset-right));
  bottom: max(0.5rem, env(safe-area-inset-bottom));
  width: min(38rem, calc(100% - 1rem));
  max-height: calc(100vh - 1rem);
  padding: 0;
  color: var(--color-text);
  background: var(--color-surface);
  border: 3px solid var(--color-border-strong);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-dialog);
  overflow: auto;
  overscroll-behavior: contain;
}

.view-settings-backdrop {
  position: fixed;
  z-index: 9490;
  inset: 0;
  background: rgba(23, 32, 28, 0.42);
  overscroll-behavior: contain;
}

.view-settings-backdrop[hidden] {
  display: none;
}

body.view-settings-open {
  overflow: hidden;
}

@supports (max-height: calc(100dvh - 1rem)) {
  .view-settings-panel {
    max-height: calc(100dvh - 1rem);
  }
}

.view-settings-panel[hidden] {
  display: none;
}

.view-settings-panel__header,
.view-settings-panel__body,
.view-settings-panel__actions {
  padding-inline: clamp(1rem, 0.7rem + 1vw, 1.5rem);
}

.view-settings-panel__header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-4);
  background: var(--color-surface);
  border-bottom: 2px solid var(--color-border);
}

.view-settings-panel__header h2 {
  margin: 0;
  font-size: clamp(1.2rem, 1.05rem + 1vw, 1.55rem);
}

.view-settings-panel__header .button {
  flex: 0 0 auto;
  white-space: nowrap;
}

.view-settings-panel__body {
  display: grid;
  gap: var(--space-5);
  padding-block: var(--space-5);
}

.view-settings-group {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.view-settings-group legend,
.view-settings-group__label {
  margin-block-end: var(--space-2);
  font-weight: 900;
}

.view-size-options {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.audience-mode-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.audience-mode-options .view-settings-option {
  min-height: 5.2rem;
}

.view-settings-option {
  appearance: none;
  display: grid;
  min-height: var(--target-min);
  place-items: center;
  padding: var(--space-2);
  color: var(--color-text);
  background: var(--color-surface-soft);
  border: 3px solid var(--color-border);
  border-radius: var(--radius-small);
  font: inherit;
  font-weight: 700;
  line-height: 1.35;
  text-align: center;
  cursor: pointer;
}

.view-settings-option small {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.view-settings-option[aria-pressed="true"] {
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-color: var(--color-border-strong);
  box-shadow: inset 0 -4px 0 var(--color-accent);
}

.view-settings-option[aria-pressed="true"]::after {
  content: "\2713  選択中";
  display: block;
  margin-block-start: 0.2rem;
  padding: 0.08rem 0.42rem;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border: 2px solid currentColor;
  border-radius: var(--radius-pill);
  font-size: var(--font-size-small);
  font-weight: 700;
  line-height: 1.35;
}

.view-settings-option[aria-pressed="true"] small {
  color: inherit;
}

.view-settings-toggles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.view-settings-toggle {
  min-height: var(--target-min);
}

.view-settings-note,
.view-settings-status {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  line-height: 1.6;
}

.view-settings-status:not(:empty) {
  padding: var(--space-3);
  color: var(--color-success);
  background: var(--color-success-bg);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-small);
  font-weight: 800;
}

.view-settings-status:not(:empty)::before {
  content: "\2713\00a0";
}

.view-settings-panel__actions {
  position: sticky;
  bottom: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  padding-block: var(--space-4);
  background: var(--color-surface-soft);
  border-top: 2px solid var(--color-border);
}

.view-settings-panel__actions .button {
  min-width: 0;
  padding-inline: var(--space-2);
  font-size: var(--font-size-small);
  overflow-wrap: normal;
  word-break: keep-all;
}

.view-settings-panel__actions--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

@media (max-width: 480px) {
  .view-settings-panel {
    left: max(0.5rem, env(safe-area-inset-left));
    width: auto;
  }

  .view-settings-panel__header [data-close-view-settings] {
    display: none;
  }

  .view-settings-toggles {
    grid-template-columns: minmax(0, 1fr);
  }

  .view-settings-panel__actions--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.35rem;
    padding: 0.5rem;
  }

  .view-settings-panel__actions .button {
    min-height: var(--target-min);
    padding-inline: 0.2rem;
    font-size: 0.68rem;
    line-height: 1.25;
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .view-size-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.35rem;
  }

  .view-settings-option {
    min-width: 0;
    padding: 0.35rem 0.15rem;
    font-size: 0.8rem;
  }

  .view-settings-option small {
    font-size: 0.65rem;
  }

  .view-settings-option[aria-pressed="true"]::after {
    content: "\2713\A 選択中";
    max-width: 100%;
    padding-inline: 0.1rem;
    font-size: 0.65rem;
    line-height: 1.1;
    overflow-wrap: anywhere;
    white-space: pre-line;
  }
}

/* --------------------------------------------------------------------------
   16. Operating-system preference support
   -------------------------------------------------------------------------- */

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

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

  .skip-link,
  .button,
  .icon-button {
    transform: none !important;
  }

  .skip-link:not(:focus):not(:focus-visible) {
    transform: translateY(calc(-100% - 2rem)) !important;
  }
}

@media (prefers-contrast: more) {
  :root {
    --color-page: #e7dfcf;
    --color-surface: #fffaf0;
    --color-surface-soft: #f4ecdc;
    --color-text: #0b120e;
    --color-text-muted: #28332d;
    --color-border: #26312b;
    --color-border-strong: #111915;
    --focus-width: 5px;
  }

  .card,
  .project-card,
  .editor-panel,
  .editor-toolbar,
  .dialog,
  .input,
  .select,
  .textarea {
    border-width: 3px;
    box-shadow: none;
  }
}

@media (forced-colors: active) {
  :root {
    --focus-width: 4px;
  }

  *,
  *::before,
  *::after {
    box-shadow: none !important;
  }

  .button,
  .icon-button,
  .mobile-tab,
  .choice,
  .card,
  .project-card,
  .editor-panel,
  .editor-toolbar,
  .dialog,
  .input,
  .select,
  .textarea,
  .notice,
  .status-banner,
  .toast,
  .view-settings-panel,
  .view-settings-option {
    color: CanvasText;
    background: Canvas;
    border-color: CanvasText;
    forced-color-adjust: auto;
  }

  .button--primary,
  .button--danger,
  .mobile-tab[aria-pressed="true"],
  .view-settings-option[aria-pressed="true"],
  .is-selected,
  [aria-pressed="true"],
  .stepper__item[aria-current="step"] {
    color: HighlightText;
    background: Highlight;
    border-color: HighlightText;
  }

  :focus,
  :focus-visible {
    outline-color: Highlight;
  }

  a {
    color: LinkText;
  }

  html[data-view-glare="reduced"] .consent-banner,
  html[data-view-glare="reduced"] .status-panel,
  html[data-view-glare="reduced"] .sample-paper,
  html[data-view-glare="reduced"] .sample-article,
  html[data-view-glare="reduced"] .visual-note,
  html[data-view-glare="reduced"] .template-mini,
  html[data-view-glare="reduced"] .site-footer,
  html[data-view-glare="reduced"] .steps-section,
  html.view-glare-reduced .consent-banner,
  html.view-glare-reduced .status-panel,
  html.view-glare-reduced .sample-paper,
  html.view-glare-reduced .sample-article,
  html.view-glare-reduced .visual-note,
  html.view-glare-reduced .template-mini,
  html.view-glare-reduced .site-footer,
  html.view-glare-reduced .steps-section {
    color: CanvasText !important;
    background: Canvas !important;
    border-color: CanvasText !important;
  }

  html[data-view-glare="reduced"] .a4-preview,
  html.view-glare-reduced .a4-preview {
    filter: none !important;
  }
}

/* --------------------------------------------------------------------------
   17. Minimal print reset. The separate A4 renderer owns page layout.
   -------------------------------------------------------------------------- */

@media print {
  :root {
    color-scheme: light;
  }

  html,
  body {
    min-width: 0;
    min-height: 0;
    color: #000;
    background: #fff;
  }

  .skip-link,
  .site-header,
  .site-footer,
  .mobile-tabs,
  .toast-region,
  .no-print {
    display: none !important;
  }

  .card,
  .project-card,
  .editor-panel,
  .editor-toolbar,
  .a4-preview,
  .a4-preview-wrapper {
    box-shadow: none !important;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}