/* base.css — centralized interface/decorative tokens and shared components.
   No @import, no remote fonts. System font stack only. */

:root {
  color-scheme: light;

  /* Core palette: primary UI may resolve only through these --ui-* tokens.
     Every semantic pair below is audited in the default and Hikaru cascades. */
  /* @contrast body-text: --ui-text on --ui-bg >= 4.5 */
  /* @contrast surface-text: --ui-text on --ui-surface >= 4.5 */
  /* @contrast surface-soft-text: --ui-text-soft on --ui-surface >= 4.5 */
  /* @contrast surface-muted-text: --ui-muted on --ui-surface >= 4.5 */
  /* @contrast background-link: --ui-link on --ui-bg >= 4.5 */
  /* @contrast surface-link: --ui-link on --ui-surface >= 4.5 */
  /* @contrast background-link-hover: --ui-link-hover on --ui-bg >= 4.5 */
  /* @contrast surface-link-hover: --ui-link-hover on --ui-surface >= 4.5 */
  /* @contrast emphasis-text: --ui-on-emphasis on --ui-emphasis >= 4.5 */
  /* @contrast control-hover-text: --ui-text on --ui-control-hover >= 4.5 */
  /* @contrast emphasis-surface-text: --ui-text on --ui-surface-emphasis >= 4.5 */
  /* @contrast emphasis-surface-soft-text: --ui-text-soft on --ui-surface-emphasis >= 4.5 */
  /* @contrast danger-surface-text: --ui-danger on --ui-surface >= 4.5 */
  /* @contrast danger-emphasis-surface-text: --ui-danger on --ui-surface-emphasis >= 4.5 */
  /* @contrast surface-border: --ui-border on --ui-surface >= 3 */
  /* @contrast background-border: --ui-border on --ui-bg >= 3 */
  /* @contrast emphasis-surface-border: --ui-border on --ui-surface-emphasis >= 3 */
  /* @contrast state-border: --ui-emphasis on --ui-surface >= 3 */
  /* @contrast danger-state-border: --ui-danger on --ui-surface-emphasis >= 3 */
  /* @contrast focus-background: --ui-focus on --ui-bg >= 3 */
  /* @contrast focus-surface: --ui-focus on --ui-surface >= 3 */
  /* @contrast focus-emphasis-surface: --ui-focus on --ui-surface-emphasis >= 3 */
  /* @contrast focus-two-tone: --ui-focus-contrast on --ui-focus >= 3 */
  --ui-white: #ffffff;
  --ui-white-soft: #f7f4f4;
  --ui-black: #111111;
  --ui-black-soft: #3f3638;
  --ui-black-muted: #5f5557;
  --ui-black-border: #736d6e;
  --ui-red: #a5001c;
  --ui-red-strong: #7a0015;
  --ui-red-soft: #fff0f2;
  --ui-bg: #e6f1f8;
  --ui-surface: #f4fafd;
  --ui-surface-emphasis: var(--ui-red-soft);
  --ui-control-hover: #f4e5e7;
  --ui-text: var(--ui-black);
  --ui-text-soft: var(--ui-black-soft);
  --ui-muted: var(--ui-black-muted);
  --ui-border: var(--ui-black-border);
  --ui-link: var(--ui-red-strong);
  --ui-link-hover: var(--ui-red);
  --ui-emphasis: var(--ui-red);
  --ui-danger: var(--ui-red);
  --ui-on-emphasis: var(--ui-white);
  --ui-focus: var(--ui-red);
  --ui-focus-contrast: var(--ui-white);
  --ui-focus-halo: rgba(165, 0, 28, 0.28);
  --ui-shadow: 0 6px 20px rgba(17, 17, 17, 0.18);
  --ui-shadow-soft: 0 2px 8px rgba(17, 17, 17, 0.14);

  /* Decorative fluid palette. Never use these for interface text, controls,
     boundaries, focus, or semantic state. */
  --fluid-body: #26262b;
  --fluid-crimson: #d02436;
  --fluid-magenta: #a83341;
  --fluid-cyan: #7a7a84;
  --fluid-turquoise: #55555d;
  --fluid-green: #6a6a72;
  --fluid-motif: #c4c4cc;
  --fluid-glow: #e6dede;

  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1080px;
  --gap: 1rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "Noto Sans", sans-serif;
  --font-display: "Trebuchet MS", "Segoe UI", var(--font);
  --transition: 180ms ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  min-width: 0;
}
html {
  min-width: 0;
  max-width: 100%;
  overflow-x: clip;
  scroll-padding: 1rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  max-width: 100%;
  min-width: 0;
  min-height: 100vh;
  overflow-x: clip;
  display: flex;
  flex-direction: column;
  font-family: var(--font);
  line-height: 1.55;
  overflow-wrap: anywhere;
  color: var(--ui-text);
  background: var(--ui-bg);
}

img, svg, video, canvas { max-width: 100%; height: auto; }
a { color: var(--ui-link); }
a:hover { color: var(--ui-link-hover); }
h1, h2, h3 { max-width: 100%; font-family: var(--font-display); line-height: 1.2; }
.muted { color: var(--ui-muted); font-size: 0.9em; }

/* Spoiler system temporarily disabled: hide the reading-progress control so the
   glossary shows only search + category filters. The elements remain in the DOM
   (the chrome renderer requires them); re-enable spoilers by removing this rule
   and the early return in js/modules/spoilers.js evaluateSpoiler(). */
.progress { display: none !important; }

/* Two-tone keyboard ring remains visible on both approved surface themes.
   Scope it to elements that can participate in keyboard navigation so
   decorative/programmatic containers do not acquire misleading rings. */
:where(
  a[href],
  button,
  input:not([type="hidden"]),
  select,
  textarea,
  summary,
  [tabindex]:not([tabindex="-1"]),
  [contenteditable]:not([contenteditable="false"])
):focus-visible {
  outline: 3px solid var(--ui-focus);
  outline-offset: 3px;
  border-radius: 4px;
  box-shadow: 0 0 0 1px var(--ui-focus-contrast);
  scroll-margin-block: 0.5rem;
}

.skip-link {
  position: fixed;
  left: 0.75rem;
  top: 0.75rem;
  z-index: 100;
  max-width: calc(100% - 1.5rem);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--ui-on-emphasis);
  background: var(--ui-emphasis);
  transform: translateY(calc(-100% - 1rem));
}
.skip-link:focus { transform: none; }

.btn {
  font: inherit;
  cursor: pointer;
  padding: 0.5rem 1rem;
  border: 1px solid var(--ui-border);
  border-radius: 999px;
  color: var(--ui-text);
  background: var(--ui-surface);
  transition: background var(--transition), transform var(--transition), border-color var(--transition);
}
.btn:hover { background: var(--ui-control-hover); }
.btn:active { transform: translateY(1px); }
.btn--reveal,
.btn--more {
  border-color: var(--ui-emphasis);
  color: var(--ui-danger);
  background: var(--ui-surface);
}
.btn--reveal:hover,
.btn--more:hover { background: var(--ui-surface-emphasis); }

.badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge--spoiler { color: var(--ui-danger); }

input[type="search"],
input[type="number"],
select {
  max-width: 100%;
  font: inherit;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--ui-border);
  border-radius: var(--radius-sm);
  color: var(--ui-text);
  background: var(--ui-surface);
}
input[type="search"] { width: 100%; }

.site-footer {
  min-width: 0;
  margin-top: auto;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--ui-muted);
  border-top: 1px solid var(--ui-border);
  background: var(--ui-surface);
}
.site-footer p { margin: 0.2rem 0; }

.richtext p { margin: 0 0 0.75rem; }
.richtext blockquote {
  margin: 0 0 0.75rem;
  padding: 0.4rem 0 0.4rem 1rem;
  border-left: 3px solid var(--ui-emphasis);
  color: var(--ui-text-soft);
  font-style: italic;
}
.richtext em { font-style: italic; }
.richtext a { text-decoration: underline; }

/* Coarse-pointer controls satisfy the Requirement 9.7 44 CSS-pixel target model. */
@media (pointer: coarse) {
  :where(a[href], button, input:not([type="hidden"]), select, textarea, summary, [role="button"]) {
    min-width: 44px;
    min-height: 44px;
  }

  a[href] {
    display: inline-block;
    max-width: 100%;
    padding-block: 0.625rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}