/* AI速報 — 見やすさと信頼感を優先した、シンプルなニュースサイトのデザイン */
:root {
  --navy: #0b1f3a; --navy-2: #13305a; --ink: #1b2433; --sub: #5a6577; --line: #dfe4ec; --bg: #f6f8fb; --card: #fff;
  --accent: #ffd23f; --link: #0b57d0; --warn: #9a3412; --warn-bg: #fff4e5; --ok: #166534;
  --c-chatgpt: #0f766e; --c-claude: #b45309; --c-gemini: #1d4ed8; --c-all: #475569;
  --radius: 10px; --wrap: 1160px;
  --font: system-ui, -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.75; font-size: 16px; overflow-wrap: anywhere; }
a { color: var(--link); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
img { max-width: 100%; height: auto; }
h1, h2, h3, h4 { line-height: 1.4; margin: 0 0 .6em; }
h2 { font-size: 1.35rem; margin-top: 2.2rem; }
h3 { font-size: 1.12rem; margin-top: 1.6rem; }
small { font-size: .82em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
.wrap--narrow { max-width: 820px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; top: 8px; background: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.muted, .note { color: var(--sub); font-size: .9rem; }

/* ヘッダー・フッター */
.site-head { background: var(--navy); color: #fff; position: sticky; top: 0; z-index: 5; box-shadow: 0 1px 0 rgba(255,255,255,.08); }
.site-head__in { display: flex; align-items: center; gap: 24px; min-height: 60px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 800; font-size: 1.2rem; letter-spacing: .04em; }
.logo__mark { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--accent); color: var(--navy); font-size: 1.05rem; }
.nav { display: flex; flex-wrap: wrap; gap: 2px 4px; list-style: none; margin: 0; padding: 0; }
.nav a { display: block; color: #dbe4f3; text-decoration: none; padding: 6px 10px; border-radius: 6px; font-size: .92rem; }
.nav a:hover, .nav a[aria-current="page"] { color: #fff; background: rgba(255,255,255,.12); }
@media (max-width: 760px) {
  .site-head { position: static; }
  .site-head__in { gap: 4px; padding-top: 8px; padding-bottom: 6px; }
  .site-head nav { width: 100%; min-width: 0; }
  .nav { width: 100%; overflow-x: auto; flex-wrap: nowrap; scrollbar-width: none; }
  .nav a { white-space: nowrap; font-size: .88rem; }
}
.site-foot { margin-top: 64px; background: var(--navy); color: #c9d4e6; padding: 32px 0 40px; font-size: .9rem; }
.site-foot a { color: #fff; }
.site-foot__lead { max-width: 820px; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 18px; list-style: none; padding: 0; margin: 16px 0; }
.copy { color: #9fb0c9; font-size: .8rem; }

/* 見出しエリア */
.page-head { background: #fff; border-bottom: 1px solid var(--line); padding: 32px 0 24px; }
.page-head h1 { font-size: clamp(1.5rem, 4vw, 2.1rem); }
.eyebrow { margin: 0 0 6px; font-size: .78rem; letter-spacing: .14em; color: var(--sub); font-weight: 700; }
.lead { color: #374151; max-width: 820px; margin: 0; }
.hero { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-2) 100%); color: #fff; padding: 40px 0 36px; }
.hero .eyebrow { color: var(--accent); }
.hero__title { font-size: clamp(1.55rem, 4.6vw, 2.5rem); margin-bottom: .4em; }
.hero__lead { color: #d6e0f0; max-width: 760px; }
.hero__links { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 18px 0 0; }
.hero .btn--ghost { color: #fff; border-color: rgba(255,255,255,.5); }

/* ボタン・バッジ */
.btn { display: inline-block; padding: 10px 18px; border-radius: 999px; font-weight: 700; text-decoration: none; border: 2px solid transparent; font-size: .95rem; line-height: 1.4; }
.btn--primary { background: var(--accent); color: var(--navy); }
.btn--primary:hover { filter: brightness(.96); }
.btn--ghost { border-color: var(--line); color: var(--navy); background: transparent; }
.badge { display: inline-block; font-size: .74rem; font-weight: 700; padding: 1px 8px; border-radius: 999px; background: #eef2f7; color: #334155; line-height: 1.7; white-space: nowrap; }
.badge--svc { color: #fff; background: var(--c-all); }
.badge--chatgpt { background: var(--c-chatgpt); } .badge--claude { background: var(--c-claude); } .badge--gemini { background: var(--c-gemini); }
.badge--pr { background: #111827; color: #fff; letter-spacing: .06em; }
.tag-ed { display: inline-block; font-size: .72rem; font-weight: 700; color: #6b21a8; background: #f3e8ff; border-radius: 4px; padding: 0 6px; margin-right: 6px; }
.unk { display: inline-block; font-size: .86rem; color: #475569; background: #f1f5f9; border: 1px dashed #94a3b8; border-radius: 4px; padding: 0 6px; }
.inq { display: inline-block; font-weight: 700; color: var(--navy); background: #e0f2fe; border-radius: 4px; padding: 0 6px; }
.stale { display: inline-block; margin-left: 6px; font-size: .74rem; font-weight: 700; color: var(--warn); background: var(--warn-bg); border-radius: 4px; padding: 0 6px; }
.age { font-size: .8rem; color: var(--sub); }
.age--new { font-weight: 800; color: #b91c1c; letter-spacing: .06em; }
.age--old { color: var(--warn); }
.age--unknown { color: #475569; }

/* トップ */
.home { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 32px; margin-top: 28px; }
.home__news, .home__svcs, .home .sources { grid-column: 1; }
.home__side { grid-column: 2; grid-row: 1 / span 2; display: grid; gap: 24px; align-content: start; }
.home__svcs { grid-column: 1 / -1; }
.home .sources { grid-column: 1 / -1; }
@media (max-width: 960px) { .home { grid-template-columns: minmax(0, 1fr); } .home__side, .home__news, .home__svcs { grid-column: 1; grid-row: auto; } }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.sec-head h2 { margin-top: 0; }
.side-h { font-size: 1.08rem; margin-top: 0; }
.home__side > section { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.svc-cards { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.svc-card a { display: grid; gap: 4px; height: 100%; padding: 16px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); border-top: 4px solid var(--c-all); color: var(--ink); text-decoration: none; }
.svc-card--chatgpt a { border-top-color: var(--c-chatgpt); } .svc-card--claude a { border-top-color: var(--c-claude); } .svc-card--gemini a { border-top-color: var(--c-gemini); }
.svc-card a:hover { box-shadow: 0 4px 16px rgba(11,31,58,.08); }
.svc-card__vendor { font-size: .78rem; color: var(--sub); font-weight: 700; }
.svc-card__name { font-size: 1.25rem; font-weight: 800; }
.svc-card__tag { font-size: .88rem; color: #374151; }

/* ニュース */
.news-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.news-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.news-item__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin: 0 0 6px; }
.news-item__title { font-size: 1.08rem; margin: 0 0 4px; }
.news-item__title a { color: var(--ink); text-decoration: none; }
.news-item__title a:hover { color: var(--link); text-decoration: underline; }
.news-item__sum { margin: 0 0 8px; color: #374151; font-size: .94rem; }
.news-item__dates { display: flex; flex-wrap: wrap; gap: 2px 16px; margin: 0; font-size: .8rem; color: var(--sub); }
.news-item__dates div { display: flex; gap: 6px; }
.news-item__dates dt { font-weight: 700; }
.news-item__dates dd { margin: 0; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
.filters button { font: inherit; font-size: .9rem; padding: 6px 14px; border-radius: 999px; border: 1px solid var(--line); background: #fff; cursor: pointer; }
.filters button[aria-pressed="true"] { background: var(--navy); color: #fff; border-color: var(--navy); }

/* 記事 */
.article__head { background: #fff; border-bottom: 1px solid var(--line); padding: 24px 0; }
.article__head h1 { font-size: clamp(1.4rem, 4vw, 1.9rem); }
.crumbs { font-size: .84rem; color: var(--sub); margin: 0 0 10px; }
.factbox { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px 20px; margin: 18px 0 0; padding: 14px 16px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); font-size: .9rem; }
.factbox dt { font-weight: 700; font-size: .78rem; color: var(--sub); }
.factbox dd { margin: 0; }
.factbox ul { margin: 0; padding-left: 1.1em; }
.factbox div:last-child { grid-column: 1 / -1; }
.prose { padding-top: 8px; }
.prose blockquote { margin: 1em 0; padding: 8px 16px; border-left: 4px solid var(--accent); background: #fff; color: #374151; }
.prose table { border-collapse: collapse; width: 100%; background: #fff; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.impact { margin-top: 28px; background: #fff; border: 1px solid var(--line); border-left: 5px solid var(--navy); border-radius: var(--radius); padding: 16px 18px; }
.impact h2 { margin-top: 0; font-size: 1.05rem; }
.impact__links { margin: 8px 0 0; }
.report { font-size: .9rem; color: var(--sub); }

/* 比較 */
.updated-box { margin-top: 20px; padding: 12px 16px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); font-size: .9rem; }
.updated-box p { margin: 0; }
.fn-sample { color: var(--link); }
.conditions { background: #fffdf3; border: 1px solid #f2e3a6; border-radius: var(--radius); padding: 4px 18px 8px; margin-top: 20px; }
.conditions h2 { font-size: 1.05rem; margin-top: 12px; }
.conditions ul { margin: 0; padding-left: 1.2em; font-size: .94rem; }
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; }
caption { text-align: left; font-weight: 700; padding: 10px 12px; font-size: .95rem; }
th, td { border-top: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; font-size: .9rem; }
thead th { background: #f1f4f9; font-size: .84rem; white-space: nowrap; }
.matrix { min-width: 860px; table-layout: fixed; }
.matrix th:first-child { width: 160px; position: sticky; left: 0; background: #f8fafc; z-index: 1; box-shadow: 1px 0 0 var(--line); }
.matrix thead th { font-size: 1rem; }
.matrix thead th small { display: block; font-weight: 400; color: var(--sub); font-size: .76rem; }
.matrix tbody th small { display: block; font-weight: 400; color: var(--sub); font-size: .76rem; }
.matrix tr.is-ed td, .matrix tr.is-ed th { background: #fbf8ff; }
.matrix tr.is-ed th { background: #f6f0ff; }
.fact { display: block; }
.fact__note { display: block; color: var(--sub); margin-top: 2px; }
.fact__src { display: block; margin-top: 4px; font-size: .76rem; color: var(--sub); }
.fn { font-size: .76rem; text-decoration: none; margin-right: 2px; }
.fn--stale { color: var(--warn); }
.price-tbl { min-width: 760px; }
.price-tbl .plan-name { background: #f8fafc; white-space: nowrap; }
.amount { font-size: 1.05rem; }
.amount__cur { display: block; font-size: .74rem; color: var(--sub); }
.svc-block { margin-top: 28px; padding-top: 4px; }
.svc-block h3 small { margin-left: 8px; color: var(--sub); font-weight: 400; }
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; }
.plan { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; font-size: .9rem; }
.plan__name { margin: 0 0 6px; font-size: 1rem; }
.plan__label { display: block; font-size: .76rem; color: var(--sub); font-weight: 700; }
.plan__points { margin: 0; padding-left: 1.1em; }
.cta { margin: 16px 0 6px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.cta__note { font-size: .8rem; color: var(--sub); margin-top: 0; }
.facts { margin: 8px 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.facts__row { display: grid; grid-template-columns: 200px minmax(0, 1fr); border-top: 1px solid var(--line); }
.facts__row:first-child { border-top: 0; }
.facts dt { padding: 10px 12px; font-weight: 700; background: #f8fafc; font-size: .9rem; }
.facts dd { margin: 0; padding: 10px 12px; font-size: .92rem; }
.facts dd ul { margin: 0; padding-left: 1.1em; }
.facts__row.is-ed dt { background: #f6f0ff; }
@media (max-width: 640px) { .facts__row { grid-template-columns: minmax(0, 1fr); } .facts dt { padding-bottom: 4px; } }
.quick { font-size: .86rem; }
.quick th, .quick td { padding: 8px; font-size: .84rem; }
.quick__list { list-style: none; margin: 0; padding: 0; }
.quick__list li { display: flex; justify-content: space-between; gap: 8px; border-bottom: 1px dotted var(--line); padding: 2px 0; }
.quick__plan { color: var(--sub); }
.quick__meta { display: block; margin-top: 4px; font-size: .76rem; color: var(--sub); }
.quick .unk { font-size: .74rem; white-space: nowrap; }

/* 変更履歴・出典 */
.changes { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.changes li { border-left: 3px solid var(--navy); padding: 2px 0 2px 12px; font-size: .9rem; }
.changes time { font-weight: 700; margin-right: 8px; }
.changes p { margin: 4px 0 0; }
.changes--full li { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--navy); border-radius: 6px; padding: 12px 14px; }
.changes__pages, .changes__src { font-size: .84rem; color: var(--sub); }
.sources { margin-top: 36px; font-size: .88rem; }
.sources h2 { font-size: 1.05rem; }
.sources ol { padding-left: 1.6em; }
.sources li { margin-bottom: 10px; }
.sources li p { margin: 0; }
.sources__meta { color: var(--sub); }
.sources__note { color: #374151; font-size: .84rem; }
.sources__foot { color: var(--sub); }
.src-tbl td small { display: block; color: var(--sub); }
.src-tbl { min-width: 640px; }

/* 選び方 */
.guide { display: grid; gap: 14px; margin-top: 24px; }
.guide__q { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; padding: 12px 16px; margin: 0; }
.guide__q legend { font-weight: 800; padding: 0 6px; }
.guide__opts { display: flex; flex-wrap: wrap; gap: 8px; }
.guide__opts label { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; cursor: pointer; font-size: .92rem; }
.guide__opts label:has(input:checked) { border-color: var(--navy); background: #eef3fb; font-weight: 700; }
.guide__result { margin-top: 20px; }
.guide__list { list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.guide__item { background: #fff; border: 1px solid var(--line); border-top: 4px solid var(--c-all); border-radius: var(--radius); padding: 14px; font-size: .92rem; }
.guide__item--chatgpt { border-top-color: var(--c-chatgpt); } .guide__item--claude { border-top-color: var(--c-claude); } .guide__item--gemini { border-top-color: var(--c-gemini); }
.guide__item p { margin: 0 0 6px; }
.guide__svc { font-weight: 800; }
.guide__plan { font-size: 1.1rem; font-weight: 800; }
.guide__src { font-size: .8rem; }
.guide__empty { background: #fff; border: 1px solid var(--line); padding: 14px; border-radius: var(--radius); }
.contact-mail { font-size: 1.2rem; font-weight: 700; }
.all-list { margin-top: 28px; }
.all-list summary { cursor: pointer; }
.all-list summary h2 { display: inline; font-size: 1.1rem; }