/* ========================================================================
   エンジニア就活ニュース — Shared stylesheet
   Used by all pages under site/. No build step required.
   ======================================================================== */

:root {
  color-scheme: light;

  /* Body uses an industrial sans (Noto Sans JP + Inter as fallback for Latin) */
  --font-sans: "Inter", "Noto Sans JP", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  /* Headlines use serif — gives the editorial / publication feel (vs tech-startup) */
  --font-display: "Noto Serif JP", "Source Serif Pro", Georgia, "Times New Roman", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Newspaper-style light palette
     Background:  warm off-white (newsprint, not glaring white)
     Surface:     pure white for cards
     Text:        near-black
     Accent:      single deep editorial red (BBC/Asahi family) */
  --color-bg: #FBFAF6;
  --color-bg-elev: #F4F1EA;
  --color-bg-card: #FFFFFF;
  --color-border: #E5E2D9;
  --color-border-strong: #C9C5B8;
  --color-text: #1A1A19;
  --color-text-muted: #5C5C58;
  --color-text-dim: #8A877F;
  --color-accent: #B91C1C;
  --color-accent-hover: #991B1B;
  --color-tag-bg: rgba(185, 28, 28, 0.05);
  --color-tag-text: #991B1B;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-feature-settings: "palt", "ss01";
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Universal focus ring — keyboard nav clarity, mouse users unaffected */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

p,
li {
  line-height: 1.8;
  letter-spacing: 0.015em;
  margin: 0;
}

/* Inline code (e.g. in article summaries) */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.1em 0.35em;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 0.2rem;
  color: var(--color-text);
}

ol,
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

::selection {
  background-color: rgba(185, 28, 28, 0.2);
  color: var(--color-text);
}

main {
  flex: 1;
  width: 100%;
}

/* ---------- Layout containers ---------- */
.container {
  max-width: 64rem; /* ~1024px */
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container { padding: 0 1.5rem; }
}

.container-narrow {
  max-width: 48rem; /* ~768px */
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container-narrow { padding: 0 1.5rem; }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

/* A second hairline below for the masthead feel (BBC/Reuters/Nikkei) */
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: var(--color-border);
  pointer-events: none;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  height: 4rem;
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .site-header__inner { padding: 0 1.5rem; }
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  min-width: 0;
}

.site-logo__badge {
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 0.125rem;
  background: var(--color-accent);
  color: #FFFFFF;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.9375rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: -0.02em;
}

.site-logo__title {
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (min-width: 400px) {
  .site-logo__title { font-size: 0.9375rem; }
}

@media (min-width: 480px) {
  .site-logo__title { font-size: 1rem; }
}

@media (min-width: 640px) {
  .site-logo__title { font-size: 1.125rem; }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  flex-shrink: 0;
  font-size: 0.875rem;
}

@media (min-width: 640px) {
  .site-nav { gap: 0.25rem; }
}

.site-nav__link {
  padding: 0.375rem 0.5rem;
  border-radius: 0.375rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color .15s ease, background-color .15s ease;
}

@media (min-width: 480px) {
  .site-nav__link { padding: 0.375rem 0.625rem; }
}

@media (min-width: 640px) {
  .site-nav__link { padding: 0.375rem 0.75rem; }
}

.site-nav__link:hover {
  color: var(--color-accent);
  background: transparent;
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 6rem;
  border-top: 3px solid var(--color-accent);
  padding: 3rem 0 2.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  background: var(--color-bg-elev);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 1.5rem;
  max-width: 64rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .site-footer__inner { padding: 0 1.5rem; }
}

.site-footer__main {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.site-footer__brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-weight: 700;
}

.site-footer__brand .site-logo__badge {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.75rem;
}

.site-footer__tagline {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  max-width: 32rem;
}

.site-footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

.site-footer__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
}

.site-footer__sep { opacity: 0.5; }

.site-footer__updated {
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
}

/* ---------- Hero (home) ---------- */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.hero--compact .hero__inner {
  padding: 2rem 1rem 2.5rem;
}
@media (min-width: 640px) {
  .hero--compact .hero__inner { padding: 2.5rem 1.5rem 3rem; }
}

/* Editorial top rule — the "masthead" red bar of newspapers */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  pointer-events: none;
}

.hero__inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 3rem 1rem;
}

@media (min-width: 640px) {
  .hero__inner { padding: 4rem 1.5rem; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Newspaper-style red square mark replacing the old pulsing dot */
.eyebrow .live-dot {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-accent);
  border-radius: 0;
  position: static;
}
.eyebrow .live-dot::before,
.eyebrow .live-dot::after { content: none; }

.live-dot {
  position: relative;
  display: inline-flex;
  width: 0.5rem;
  height: 0.5rem;
}

.live-dot::before,
.live-dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 9999px;
  background: var(--color-accent);
}

.live-dot::before { opacity: 0.75; }

@keyframes ping {
  75%, 100% { transform: scale(2); opacity: 0; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: no-preference) {
  .articles .article-card {
    animation: fadeUp .45s ease-out both;
    animation-delay: calc(var(--idx, 0) * 60ms);
  }
  .live-dot::before {
    animation: ping 2s cubic-bezier(0, 0, 0.2, 1) 3;
  }
}

.hero__title {
  margin-top: 0.875rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: 0;
  text-wrap: balance;
  line-height: 1.2;
}

@media (min-width: 640px) { .hero__title { font-size: 2.75rem; } }
@media (min-width: 768px) { .hero__title { font-size: 3.25rem; } }

.hero__intro {
  margin-top: 1rem;
  max-width: 52rem;
  color: var(--color-text);
  text-wrap: pretty;
  font-size: 1rem;
  line-height: 1.8;
}

@media (min-width: 768px) {
  .hero__intro { font-size: 1.0625rem; }
}

.hero__meta {
  margin-top: 1.25rem;
  color: var(--color-text-dim);
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.hero__meta strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.375rem;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.hero__meta::before {
  content: "";
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--color-accent);
}

.hero__list {
  margin-top: 2rem;
  max-width: 48rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.hero__list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  line-height: 1.5;
}

.hero__list-num {
  flex-shrink: 0;
  margin-top: 0.125rem;
  width: 1.25rem;
  color: var(--color-text-dim);
  font-size: 0.875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.hero__list a {
  color: var(--color-text);
  transition: color .15s ease;
}

.hero__list a:hover { color: var(--color-accent-hover); }

.hero__list-source {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.hero__list-more {
  font-size: 0.875rem;
  color: var(--color-text-dim);
  padding-left: 2rem;
}

.hero__cta {
  margin-top: 2.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 0.125rem;
  font-weight: 600;
  transition: background-color .15s ease;
  cursor: pointer;
  border: none;
  font-size: 0.9375rem;
}

.btn--primary {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn--primary:hover { background: var(--color-accent-hover); }

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
  background: var(--color-bg-elev);
}

/* ---------- Section ---------- */
.section {
  max-width: 64rem;
  margin: 0 auto;
  padding: 3rem 1rem;
}

@media (min-width: 640px) {
  .section { padding: 4rem 1.5rem; }
}

.section__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.section__sub {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--color-text-dim);
}

.section__group-title {
  margin: 0 0 0.875rem 0;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section__group + .section__group {
  margin-top: 3rem;
}

/* ---------- Day card (grid) ---------- */
.day-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
  gap: 1rem;
}

.day-card {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  background: var(--color-bg-card);
  transition: border-color .15s ease, box-shadow .15s ease;
}

.day-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.day-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.day-card__date {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.day-card__count {
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.day-card__list {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.day-card__list li {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.55;
  position: relative;
  padding-left: 1rem;
}

.day-card__list li::before {
  content: "·";
  position: absolute;
  left: 0.2rem;
  color: var(--color-text-dim);
  font-weight: 700;
}

.day-card__list li.day-card__more::before { content: none; }
.day-card__list li.day-card__more { padding-left: 0; }

.day-card__more {
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.day-card__cta {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  opacity: 0.75;
  transition: opacity .15s ease, transform .15s ease;
}

.day-card:hover .day-card__cta {
  opacity: 1;
  transform: translateX(2px);
}

.see-all {
  margin-top: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
}

.see-all:hover { color: var(--color-accent-hover); }

/* ---------- Day page ---------- */
.day-article {
  max-width: 48rem;
  margin: 0 auto;
  padding: 2.5rem 1rem;
}

@media (min-width: 640px) {
  .day-article { padding: 3.5rem 1.5rem; }
}

@media (min-width: 1024px) {
  .day-article { max-width: 64rem; }
}

@media (min-width: 1280px) {
  .day-article { max-width: 72rem; }
}

/* When rendered directly under hero on home — no extra top padding */
.day-article--home {
  padding-top: 0;
}
@media (min-width: 640px) {
  .day-article--home { padding-top: 0; }
}
.day-article--home > .articles {
  margin-top: 2.5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color .15s ease;
}

.back-link:hover { color: var(--color-text); }

.day-header {
  margin-top: 2rem;
}

.day-title {
  margin-top: 0.75rem;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0;
  text-wrap: balance;
  line-height: 1.2;
}

@media (min-width: 640px) { .day-title { font-size: 2.75rem; } }

.day-meta {
  margin-top: 1.25rem;
  color: var(--color-text-dim);
  font-size: 0.875rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.day-meta::before {
  content: "";
  display: inline-block;
  width: 1.5rem;
  height: 1px;
  background: var(--color-accent);
}

.day-meta strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.375rem;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.day-intro {
  margin-top: 1rem;
  max-width: 52rem;
  color: var(--color-text);
  text-wrap: pretty;
  font-size: 1rem;
  line-height: 1.8;
}

@media (min-width: 768px) {
  .day-intro { font-size: 1.0625rem; }
}

/* ---------- Table of contents (collapsible <details>) ---------- */
.toc {
  margin-top: 2rem;
  padding: 0;
  border-top: 1px solid var(--color-text);
  border-bottom: 1px solid var(--color-border);
  border-left: none;
  border-right: none;
  border-radius: 0;
  background: transparent;
  overflow: hidden;
}

.toc[open] {
  background: transparent;
}

.toc__summary {
  list-style: none;
  cursor: pointer;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  user-select: none;
  transition: background-color .15s ease;
}

.toc__summary::-webkit-details-marker { display: none; }
.toc__summary:hover { background: transparent; color: var(--color-accent); }

.toc__summary-text {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.toc__summary-meta {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc__chevron {
  transition: transform .2s ease;
}

.toc[open] .toc__chevron { transform: rotate(180deg); }

.toc__list {
  margin: 0 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

@media (min-width: 640px) {
  .toc__summary { padding: 0.875rem 1.25rem; }
  .toc__list { margin: 0 1.25rem 1.25rem; }
}

.toc__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  line-height: 1.5;
}

.toc__num {
  flex-shrink: 0;
  margin-top: 0.125rem;
  width: 1.5rem;
  color: var(--color-text-dim);
  font-size: 0.875rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.toc__list a {
  color: var(--color-text);
  transition: color .15s ease;
}

.toc__list a:hover { color: var(--color-accent-hover); }

/* ---------- Article cards ---------- */
.articles {
  margin-top: 2.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .articles { gap: 1.25rem; }
}

@media (min-width: 1024px) {
  .articles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Sectioned article groups: 「IT就活ニュース」「視野を広げる」 */
.articles-group {
  margin-top: 2.5rem;
}

.articles-group + .articles-group {
  margin-top: 3.5rem;
}

.articles-group__header {
  border-top: 2px solid var(--color-text);
  padding-top: 0.875rem;
  margin-bottom: 1.25rem;
}

.articles-group__title {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--color-text);
  display: inline-flex;
  align-items: baseline;
  gap: 0.75rem;
}

.articles-group__count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-dim);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

/* The "broaden perspective" section gets a distinct framing comment */
.articles-group--other .articles-group__header {
  border-top-color: var(--color-accent);
}

/* The "thinking skills" section: sepia/warm intro to differentiate from IT就活 + 視野 */
.articles-group--thinking .articles-group__header {
  border-top-color: #6B4513;
}
.articles-group--thinking .articles-group__intro {
  background: #F2EBDD;
  border-left-color: #6B4513;
}

.articles-group__intro {
  margin: 0 0 1.5rem;
  padding: 0.875rem 1.125rem;
  background: var(--color-bg-elev);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.7;
  font-style: italic;
}

.articles-group .articles {
  margin-top: 0;
}

/* Home-only: compact headline list (article-card 本体は出さない) */
.home-headlines-group {
  margin-top: 2.5rem;
}
.home-headlines-group + .home-headlines-group {
  margin-top: 2.5rem;
}
.home-headlines-group__header {
  border-top: 2px solid var(--color-text);
  padding-top: 0.875rem;
  margin-bottom: 1.25rem;
}
.home-headlines-group--other .home-headlines-group__header {
  border-top-color: var(--color-accent);
}
.home-headlines-group--thinking .home-headlines-group__header {
  border-top-color: #6B4513;
}
.home-headlines-group--thinking .home-headlines-group__intro {
  background: #F2EBDD;
  border-left-color: #6B4513;
}
.home-headlines-group__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  display: inline-flex;
  align-items: baseline;
  gap: 0.625rem;
}
.home-headlines-group__count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-dim);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}
.home-headlines-group__intro {
  margin: 0 0 1.25rem;
  padding: 0.75rem 1rem;
  background: var(--color-bg-elev);
  border-left: 3px solid var(--color-accent);
  color: var(--color-text);
  font-size: 0.875rem;
  line-height: 1.65;
  font-style: italic;
}
.home-headlines-list {
  display: flex;
  flex-direction: column;
}
.home-headlines-list li {
  border-bottom: 1px solid var(--color-border);
}
.home-headlines-list li:last-child { border-bottom: none; }
.home-headlines-list a {
  display: grid;
  grid-template-columns: 1.5rem 1fr;
  column-gap: 0.875rem;
  row-gap: 0.25rem;
  padding: 0.875rem 0;
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.5;
  transition: color .15s ease;
}
.home-headlines-list a:hover {
  color: var(--color-accent);
}
.home-headlines-list__num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-text-dim);
  font-variant-numeric: tabular-nums;
  grid-column: 1;
  grid-row: 1;
  padding-top: 0.125rem;
}
.home-headlines-list__title {
  grid-column: 2;
  grid-row: 1;
  font-weight: 500;
}
.home-headlines-list__sub {
  grid-column: 2;
  grid-row: 2;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.home-headlines-list__sub strong {
  color: var(--color-accent);
  font-weight: 600;
}
.home-headlines-list__source {
  grid-column: 2;
  grid-row: 3;
  font-size: 0.7rem;
  color: var(--color-text-dim);
  letter-spacing: 0.04em;
}

.home-read-all {
  margin-top: 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: var(--color-accent);
  color: #FFFFFF;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 0.125rem;
  transition: background-color .15s ease;
}
.home-read-all:hover {
  background: var(--color-accent-hover);
}

.article-card {
  scroll-margin-top: 5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  background: var(--color-bg-card);
  transition: border-color .15s ease, box-shadow .15s ease;
}

/* Stretched link so the entire card area is tappable (title anchor handles it) */
.article-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  z-index: 1;
}

/* Keep meta links above the stretched link so they stay independently tappable */
.article-card__meta { position: relative; z-index: 2; }
.article-card__body > .tags { position: relative; z-index: 2; }
/* Allow user to select summary text — overlay is below summary */
.article-card__summary { position: relative; z-index: 2; pointer-events: none; }
.article-card__summary code { pointer-events: auto; }

@media (min-width: 640px) {
  .article-card { padding: 1.5rem; }
}

.article-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.article-card__body {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* Tags moved ABOVE the title so they read as a category label */
.article-card__body > .tags {
  margin-bottom: 0.625rem;
}

.article-card__title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.45;
  text-wrap: balance;
  min-height: 2lh;
}

@media (min-width: 640px) {
  .article-card__title { font-size: 1.25rem; }
}

.article-card__title a {
  transition: color .15s ease;
}

.article-card:hover .article-card__title a {
  color: var(--color-accent-hover);
}

.article-card__title a:focus-visible {
  color: var(--color-accent-hover);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 4px;
}

.article-card__summary {
  margin-top: 0.625rem;
  color: var(--color-text-muted);
  text-wrap: pretty;
  font-size: 0.9375rem;
  line-height: 1.75;
}

.article-card__meta {
  margin-top: auto;
  padding-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  border-top: 1px solid var(--color-border);
}

/* Spacing buffer between summary and the auto-pushed meta */
.article-card__summary { margin-bottom: 1.25rem; }

.article-source {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.article-source svg { width: 0.875rem; height: 0.875rem; opacity: 0.6; }

/* Letter-based source badge — gives each source a distinct visual identity */
.article-source__badge {
  width: 1.125rem;
  height: 1.125rem;
  border-radius: 0.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0;
  color: oklch(0.18 0.012 260);
  background: var(--source-color, oklch(0.75 0.08 235));
  flex-shrink: 0;
}

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid currentColor;
  transition: color .15s ease;
  margin-left: auto;
}

.article-link:hover {
  color: var(--color-accent-hover);
}
.article-link:hover svg { transform: translate(2px, -2px); }
.article-link svg { width: 0.8125rem; height: 0.8125rem; transition: transform .2s ease; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.05rem 0;
  background: transparent;
  color: var(--color-tag-text);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: none;
}

/* Separator between tags reads like newspaper category breadcrumbs */
.tag-chip + .tag-chip::before {
  content: "·";
  margin: 0 0.4rem;
  color: var(--color-text-dim);
  font-weight: 400;
}

/* ---------- Day navigation ---------- */
/* 3-slot grid: prev | latest | next(or status). Mobile-first vertical stack;
   horizontal 3-column from 640px. Slots are statically baked at build time and
   self-healed at runtime by /assets/day-nav.js reading /days.json. */
.day-nav {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: 0.75rem;
}

.day-nav__btn {
  min-height: 44px;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 0.125rem;
  background: var(--color-bg-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  transition: border-color .15s ease, color .15s ease, transform .15s ease;
}

.day-nav__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.day-nav__btn:active { transform: translateY(1px); }

.day-nav__btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 0.125rem;
}

/* prev/next align their content to the outer edges for left/right legibility */
.day-nav__btn--prev { align-items: flex-start; text-align: left; }
.day-nav__btn--next { align-items: flex-end; text-align: right; }

/* Accent primary button — sits center, always present */
.day-nav__btn--latest {
  flex-direction: row;
  gap: 0.4rem;
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  font-weight: 700;
}

.day-nav__btn--latest:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #fff;
}

.day-nav__status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 0.875rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-style: italic;
}

.day-nav__status-icon {
  width: 0.875rem;
  height: 0.875rem;
  opacity: 0.7;
}

.day-nav__status-text { font-weight: 500; }

.day-nav__label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--color-text-dim);
}

.day-nav__btn--next .day-nav__label { justify-content: flex-end; }

.day-nav__date {
  margin-top: 0.25rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

/* From 640px: 3 columns. grid-column is scoped here so mobile stays full-width
   vertical regardless of slot presence (prev may be absent on the oldest page). */
@media (min-width: 640px) {
  .day-nav {
    grid-template-columns: 1fr auto 1fr;
    align-items: stretch;
  }
  .day-nav__btn--prev { grid-column: 1; justify-self: stretch; }
  .day-nav__btn--latest { grid-column: 2; justify-self: center; }
  .day-nav__btn--next,
  .day-nav__status { grid-column: 3; justify-self: stretch; }
}

/* Respect reduced-motion: drop the press-down transform transition. */
@media (prefers-reduced-motion: reduce) {
  .day-nav__btn { transition: border-color .15s ease, color .15s ease; }
  .day-nav__btn:active { transform: none; }
}

/* ---------- Empty state ---------- */
.empty {
  margin-top: 2.5rem;
  padding: 2.5rem;
  border: 1px dashed var(--color-border);
  border-radius: 0.75rem;
  text-align: center;
  color: var(--color-text-muted);
}

/* ---------- 404 ---------- */
.not-found {
  max-width: 48rem;
  margin: 0 auto;
  padding: 6rem 1rem;
  text-align: center;
}

.not-found__code {
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--color-text-dim);
  line-height: 1;
}

@media (min-width: 640px) {
  .not-found__code { font-size: 6rem; }
}

.not-found__title {
  margin-top: 1rem;
  font-size: 1.5rem;
  font-weight: 700;
}

@media (min-width: 640px) {
  .not-found__title { font-size: 1.875rem; }
}

.not-found__text {
  margin-top: 0.75rem;
  color: var(--color-text-muted);
}

.not-found__btn {
  margin-top: 2rem;
}