:root {
  --color-accent: #d99a3d;
  --color-accent-2: #3fa7a0;
  --color-ink: #e9e6dd;
  --color-bg: #14171c;
  --color-surface: #1b1f26;
  --color-border: #2c313b;
  --color-muted: #8b8f99;
  --font-sans: "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;
  --font-mono: "Consolas", "SFMono-Regular", "Yu Gothic", "Courier New", monospace;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.75;
  word-break: break-word;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 1rem 0.9rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.site-title {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-ink);
  letter-spacing: 0.01em;
}

.site-title a {
  color: inherit;
}

.site-tagline {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.site-tagline::before {
  content: "// ";
  color: var(--color-muted);
}

.site-header__search {
  display: flex;
  gap: 0.4rem;
  align-self: center;
}

.site-header__search-input {
  width: 170px;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  border-radius: 2px;
}

.site-header__search-input::placeholder {
  color: var(--color-muted);
}

.site-header__search-btn {
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.45rem 0.8rem;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  border-radius: 2px;
  white-space: nowrap;
}

.site-header__search-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.site-header__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 0.55rem;
}

.site-header__categories a {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--color-muted);
}

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

/* Headline list (top page) */
.headline-list {
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.headline-item {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.98rem;
  line-height: 1.5;
}

.headline-item a {
  color: var(--color-ink);
}

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

.headline-item__date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-accent);
  margin-right: 0.3rem;
}

.headline-item__source {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-left: 0.4rem;
}

/* Category sections (top page) */
.category-section {
  margin: 2rem 0;
}

.category-section__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 210;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 0.9rem;
}

.category-page__image,
.article-detail__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 210;
  object-fit: cover;
  border-radius: 4px;
  margin: 0.8rem 0 1.2rem;
}

.category-section__title {
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-ink);
}

.category-section .headline-list {
  margin: 0;
}

.category-section__item--extra.is-hidden {
  display: none;
}

.category-section__more {
  display: inline-block;
  margin-top: 0.6rem;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.category-section__more:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Search CTA (bottom of top page) */
.search-cta {
  margin: 2rem 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.search-cta__form {
  display: flex;
  flex: 1 1 320px;
  gap: 0.6rem;
}

.search-cta__form .filter-bar__search {
  flex: 1 1 auto;
}

.search-cta__link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  white-space: nowrap;
}

/* Tag groups (region / topic) */
.tag-clouds {
  margin-top: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.tag-group__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-muted);
  letter-spacing: 0.06em;
  margin-bottom: 0.35rem;
}

/* Editorial note */
.editorial-note {
  font-size: 0.8rem;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 0 0 1.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--color-border);
}

/* Filter bar */
.filter-bar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 1rem;
  margin: 1.5rem 0;
}

.filter-bar__row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.filter-bar__search {
  flex: 1 1 220px;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.filter-bar__search::placeholder {
  color: var(--color-muted);
}

.filter-bar__clear {
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.filter-bar__clear:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.tag-cloud {
  margin-top: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.28rem 0.65rem;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
}

.tag-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.tag-chip.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #14171c;
}

.tag-chip__count {
  color: inherit;
  opacity: 0.7;
  margin-left: 0.25rem;
}

.tag-chip--extra.is-hidden {
  display: none;
}

.tag-group__more {
  display: block;
  margin-top: 0.5rem;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.tag-group__more:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.article-card__date {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

.empty-state {
  padding: 3rem 1rem;
  text-align: center;
  color: var(--color-muted);
}

/* Article detail */
.article-detail {
  padding: 0;
  margin: 1.5rem 0;
}

.article-detail__title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.55rem;
  line-height: 1.5;
  margin: 0.4rem 0 0.8rem;
}

.article-detail__meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.article-detail__body {
  font-size: 1rem;
}

.article-detail__body p {
  margin: 0 0 1.1rem;
}

.article-detail__source {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* Related articles (bottom of article detail) */
.related-articles {
  margin: 2rem 0;
}

.related-articles__title {
  font-size: 1.05rem;
  margin: 0 0 0.4rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-accent);
  color: var(--color-ink);
}

.related-articles .headline-list {
  margin: 0;
}

.related-articles__item--extra.is-hidden {
  display: none;
}

.related-articles__more {
  display: inline-block;
  margin-top: 0.6rem;
  background: none;
  border: 1px solid var(--color-border);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.related-articles__more:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-muted);
  margin: 1rem 0 0;
}

.breadcrumb a {
  color: var(--color-muted);
}

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

/* Tweet embeds */
.tweet-embed-section {
  margin: 1.5rem 0;
}

.tweet-embed-section h2 {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin: 0 0 0.8rem;
}

.tweet-embed-section blockquote.twitter-tweet {
  margin: 0 0 1rem;
}

.lang-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  margin-left: 0.5rem;
}

/* Ad slot */
.ad-slot {
  margin: 1.5rem 0;
  text-align: center;
  min-height: 0;
}

.ad-slot--placeholder {
  background: rgba(63, 167, 160, 0.12);
  border: 1px dashed var(--color-accent-2);
  color: var(--color-accent-2);
  padding: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
}

/* Static pages */
.page-content {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 1.75rem;
  margin: 1.5rem 0 3rem;
}

.page-content h1 {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.4rem;
}

.page-content h2 {
  font-size: 1.05rem;
  margin-top: 1.8rem;
  color: var(--color-accent);
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  margin-top: 3rem;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

.site-footer a {
  color: var(--color-muted);
}

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

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

@media (max-width: 600px) {
  .site-title {
    font-size: 1.25rem;
  }

  .article-detail__title {
    font-size: 1.25rem;
  }
}

@media (max-width: 380px) {
  .container {
    padding: 0 0.75rem;
  }

  .filter-bar__search {
    flex-basis: 100%;
  }
}