/* AI News Watch — site styles. Card-based, mobile-first editorial look. */

:root {
  --ink: #16181d;
  --ink-soft: #3d424d;
  --ink-mute: #6b7280;
  --line: #e6e7ea;
  --line-soft: #eef0f3;
  --bg: #f6f6f4;
  --surface: #ffffff;
  --accent: #4f46e5;
  --accent-soft: #eef0ff;
  --imp-a: #e11d48;
  --imp-a-bg: #ffe4ea;
  --imp-b: #b45309;
  --imp-b-bg: #fdf0d5;
  --imp-c: #2563eb;
  --imp-c-bg: #e2ecff;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(16, 18, 29, .04), 0 4px 16px rgba(16, 18, 29, .05);
  --maxw: 1080px;
}

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 16px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--ink);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
  padding-bottom: 12px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; }
.brand:hover { text-decoration: none; }
.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  font-size: 15px;
}
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__name { font-weight: 800; font-size: 16px; letter-spacing: .2px; }
.brand__tagline { font-size: 11px; color: #aeb4c2; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  color: #d7dae2;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 7px;
}
.site-nav a:hover { color: #fff; background: rgba(255,255,255,.08); text-decoration: none; }
.site-nav__rss {
  color: #fff !important;
  background: var(--accent);
}
.site-nav__rss:hover { background: #4338ca; }

/* ---------- Intro ---------- */
.intro { padding: 28px 0 10px; }
.intro__title { margin: 0 0 6px; font-size: 26px; font-weight: 800; letter-spacing: -.01em; }
.intro__lead { margin: 0; max-width: 60ch; color: var(--ink-soft); }

/* ---------- Toolbar / filters ---------- */
.toolbar {
  position: sticky;
  top: 54px;
  z-index: 10;
  background: var(--bg);
  padding: 12px 0 10px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.toolbar__row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.toolbar__count { margin: 8px 0 0; font-size: 12px; color: var(--ink-mute); }

.segmented { display: inline-flex; background: var(--surface); border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.segmented__btn {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 13px; font-weight: 600; color: var(--ink-soft);
  padding: 5px 12px; border-radius: 999px;
}
.segmented__btn.is-active { background: var(--ink); color: #fff; }

.select, .search {
  font: inherit; font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
}
.search { flex: 1; min-width: 160px; }
.select:focus, .search:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }

/* ---------- News groups + cards ---------- */
.news-group { margin: 18px 0 26px; }
.news-group__label {
  margin: 0 0 12px;
  font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em;
  color: var(--ink-mute);
  display: flex; align-items: center; gap: 10px;
}
.news-group__label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform .12s ease, box-shadow .12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 22px rgba(16,18,29,.09); }
.imp-accent-A { border-left-color: var(--imp-a); }
.imp-accent-B { border-left-color: var(--imp-b); }
.imp-accent-C { border-left-color: var(--imp-c); }

.card__thumb { display: block; }
.card__thumb .thumb { border-radius: 0; }
.card:hover .thumb__img { transform: scale(1.03); }
.card__body { padding: 14px 16px; display: flex; flex-direction: column; flex: 1; }
.card__top { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.card__source { font-size: 12px; font-weight: 700; color: var(--ink-soft); }
.card__date { margin-left: auto; font-size: 12px; color: var(--ink-mute); }
.card__title { margin: 0 0 8px; font-size: 16px; line-height: 1.45; font-weight: 700; }
.card__title a { color: var(--ink); }
.card__title a:hover { color: var(--accent); }
.card__summary {
  margin: 0 0 10px; font-size: 13.5px; color: var(--ink-soft);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card__meta { margin-top: auto; display: flex; flex-wrap: wrap; gap: 5px; }

/* ---------- Thumbnail (cards + article hero) ---------- */
/* og:image があれば実画像、無ければ source 由来の色で塗ったプレースホルダを表示する */
.thumb {
  position: relative;
  display: block;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #0f1117;
}
.thumb__fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(120% 120% at 80% 0%, hsl(var(--ph-hue, 230) 70% 42% / .9), transparent 60%),
    linear-gradient(135deg, hsl(var(--ph-hue, 230) 48% 30%), hsl(calc(var(--ph-hue, 230) + 36) 52% 18%));
}
.thumb__mark {
  padding: 0 14px;
  color: rgba(255, 255, 255, .92);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .04em;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .25);
}
/* 実画像はプレースホルダの上に重ねる。読み込み失敗時は onerror で <img> を消すと
   下のプレースホルダが見える（破綻しない） */
.thumb__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .2s ease;
}

/* ---------- Badges + chips ---------- */
.badge {
  display: inline-grid; place-items: center;
  min-width: 20px; height: 20px; padding: 0 6px;
  border-radius: 6px; font-size: 11px; font-weight: 800;
}
.imp-A { background: var(--imp-a-bg); color: var(--imp-a); }
.imp-B { background: var(--imp-b-bg); color: var(--imp-b); }
.imp-C { background: var(--imp-c-bg); color: var(--imp-c); }

.chip {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--line-soft);
  color: var(--ink-soft);
  font-size: 11px; font-weight: 600;
}
.chip--type { background: var(--accent-soft); color: var(--accent); }

/* ---------- Article page ---------- */
.breadcrumb { padding: 18px 0 4px; font-size: 13px; }
.article {
  --pad: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-top: 4px solid var(--line);
  border-radius: var(--radius);
  padding: var(--pad);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}
.article.imp-accent-A { border-top-color: var(--imp-a); }
.article.imp-accent-B { border-top-color: var(--imp-b); }
.article.imp-accent-C { border-top-color: var(--imp-c); }
.article__hero { margin: calc(var(--pad) * -1) calc(var(--pad) * -1) 20px; }
.article__hero .thumb { aspect-ratio: 21 / 9; }
.article__hero .thumb__mark { font-size: 22px; }
.article__badges { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 12px; }
.article__source { font-size: 13px; font-weight: 700; color: var(--ink-soft); }
.article__date { font-size: 13px; color: var(--ink-mute); }
.article__title { margin: 0 0 4px; font-size: 25px; line-height: 1.35; font-weight: 800; letter-spacing: -.01em; }

.block { margin: 20px 0; }
.block__label {
  margin: 0 0 6px; font-size: 12px; font-weight: 800; letter-spacing: .05em;
  text-transform: uppercase; color: var(--accent);
}
.block__body { margin: 0; }
.block__body p { margin: 0 0 6px; }
.block--summary .block__body { font-size: 16px; }
.block--impact, .block--action {
  background: #fafafb; border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm); padding: 14px 16px;
}

.article__facts {
  display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px;
  margin: 22px 0; padding: 16px; background: #fafafb;
  border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  font-size: 13.5px;
}
.article__facts dt { color: var(--ink-mute); font-weight: 700; }
.article__facts dd { margin: 0; color: var(--ink); }
.article__tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0; }

.article__actions { margin: 22px 0 8px; }
.share { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line-soft); }
.share__label { font-size: 13px; color: var(--ink-mute); font-weight: 700; }
.share__btn {
  font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
}
.share__btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; font-weight: 700; font-size: 14px;
  border: 0; cursor: pointer;
}
.btn:hover { background: #4338ca; text-decoration: none; }

.copy-btn {
  font: inherit; font-size: 12px; font-weight: 600; white-space: nowrap;
  padding: 8px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--ink); color: #fff; cursor: pointer;
}
.copy-btn.is-copied { background: #15803d; border-color: #15803d; }

/* ---------- Sections ---------- */
.section-title {
  margin: 0 0 12px; font-size: 18px; font-weight: 800;
  padding-left: 10px; border-left: 3px solid var(--accent);
}
.subscribe-cta, .related { margin: 30px 0; }
.notice {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px;
}

/* ---------- Feeds ---------- */
.feed-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 12px; }
.feed-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.feed-card__name { font-weight: 700; margin-bottom: 4px; }
.feed-card__desc { font-size: 12.5px; color: var(--ink-mute); min-height: 38px; margin-bottom: 10px; }
.feed-card__url { display: flex; gap: 6px; }
.feed-card__url input {
  flex: 1; min-width: 0; font-size: 12px; padding: 7px 9px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #f9fafb; color: var(--ink-soft);
}

/* ---------- States ---------- */
.empty-state {
  padding: 28px 20px; text-align: center; color: var(--ink-mute);
  background: var(--surface); border: 1px dashed var(--line); border-radius: var(--radius);
}
.is-hidden { display: none !important; }

/* ---------- Lang switcher ---------- */
.lang-switcher { display: inline-flex; gap: 4px; margin-top: 12px; }
.lang-switcher__item {
  padding: 4px 10px; font-size: 12px; font-weight: 700; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft); background: var(--surface);
}
.lang-switcher__item.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 40px; padding: 26px 0; background: var(--surface);
  border-top: 1px solid var(--line); color: var(--ink-mute); font-size: 13px;
}
.site-footer__links { display: flex; flex-wrap: wrap; gap: 16px; margin: 0 0 10px; }
.site-footer__note { margin: 2px 0; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .intro__title { font-size: 22px; }
  .article { --pad: 18px; }
  .article__title { font-size: 21px; }
  .toolbar { top: 52px; }
  .search { flex-basis: 100%; }
  .card-grid { grid-template-columns: 1fr; }
}