/*
  File: assets/css/style.css
  Description: Accessible styles for the bilingual GitHub Pages essay
  Author: 5garashi.com Design Office
  Created: 2026-10-31
  License: MIT
  SPDX-License-Identifier: MIT
*/
:root {
  color-scheme: light;
  --paper: #F9EFCB;
  --head: #FFE699;
  --ink: #385723;
  --volt: #B92613;
  --card: #FFFDF2;
  --line: #DFCF9A;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --paper: #1A2212;
    --head: #2B3A20;
    --ink: #C9C1A5;
    --volt: #F07B5F;
    --card: #222C1A;
    --line: #4C5C3B;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, "Noto Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.75;
}

a {
  color: var(--ink);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.16em;
}

a:focus-visible {
  outline: 3px solid var(--volt);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  top: 0;
  left: -10000px;
  z-index: 1;
  padding: 0.65rem 1rem;
  background: var(--card);
}

.skip-link:focus {
  left: 0.75rem;
  top: 0.75rem;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1rem max(1.25rem, calc((100% - 72rem) / 2));
  background: var(--head);
  border-bottom: 2px solid var(--ink);
}

.site-title {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  text-decoration: none;
}

.site-logo {
  display: block;
  width: clamp(8.5rem, 24vw, 11rem);
  max-width: 100%;
  height: auto;
}

.language-nav a {
  display: inline-flex;
  min-width: 5.5rem;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.75rem;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--card);
  font-weight: 700;
  text-decoration: none;
}

.page-content {
  width: min(100% - 2rem, 72rem);
  min-height: 65vh;
  margin: 2rem auto 4rem;
  padding: clamp(1.25rem, 4vw, 3rem);
  overflow-wrap: anywhere;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

.page-content h1,
.page-content h2,
.page-content h3 {
  line-height: 1.4;
  text-wrap: pretty;
}

.page-content h1 {
  font-size: clamp(1.65rem, 4vw, 2.4rem);
}

.page-content h2 {
  margin-top: 2.25rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--line);
}

.page-content > ul a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.page-content pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
}

.page-content table {
  display: block;
  max-width: 100%;
  overflow-x: auto;
}

.site-footer {
  padding: 1.5rem 1rem 2rem;
  border-top: 1px solid var(--line);
  text-align: center;
}

.site-footer p {
  margin: 0 0 0.25rem;
  font-weight: 700;
}

.site-footer .logo-credit {
  font-size: 0.875rem;
  font-weight: 400;
}

/* Keep long display equations inside the document at narrow widths. */
mjx-container[display="true"] {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding-block: 0.5rem;
}