/* 日本AI出版社速報版 — 紺の紙面（kaz見本 2026-10-07） */
:root {
  --navy: #0e2c45;
  --navy-2: #1d4466;
  --navy-soft: #e9eef3;
  --paper: #ffffff;
  --card: #ffffff;
  --ink: #15212c;
  --ink-2: #4a5662;
  --ink-3: #7d8792;
  --rule: #d9dee3;
  --red: #c0392b;
  --link: #1d4f7f;
  --quote: #f2f5f8;
  --serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", system-ui, sans-serif;
  --w: 1200px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --navy: #8fb6da; --navy-2: #b9d3ea; --navy-soft: #1a2a39; --paper: #0d1620; --card: #121e2a;
    --ink: #e6ecf2; --ink-2: #b2bec9; --ink-3: #85919c; --rule: #263646; --red: #e56b5c; --link: #9cc3ea; --quote: #16232f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --navy: #8fb6da; --navy-2: #b9d3ea; --navy-soft: #1a2a39; --paper: #0d1620; --card: #121e2a;
  --ink: #e6ecf2; --ink-2: #b2bec9; --ink-3: #85919c; --rule: #263646; --red: #e56b5c; --link: #9cc3ea; --quote: #16232f;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.85; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--w); margin: 0 auto; padding: 0 16px; }
@media (min-width: 900px) { .wrap { padding: 0 32px; } }

/* 上の細い帯 */
.topbar { display: flex; justify-content: space-between; gap: 8px 16px; flex-wrap: wrap; padding: 14px 0 0; font-size: 12.5px; color: var(--ink-2); }
.topbar .en { letter-spacing: .18em; }

/* 題字 */
.masthead { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; flex-wrap: wrap; padding: 22px 0 22px; }
.brand { display: flex; align-items: center; gap: 18px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand .logo { width: 84px; height: 84px; border-radius: 50%; flex: none; }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: clamp(28px, 5vw, 52px); line-height: 1.15; letter-spacing: .02em; color: var(--navy); white-space: nowrap; }
.brand-name .ed { color: var(--red); margin-left: .25em; }
.tagline { font-family: var(--serif); font-size: 19px; letter-spacing: .12em; color: var(--navy); }
@media (max-width: 640px) {
  .brand { gap: 12px; }
  .brand .logo { width: 52px; height: 52px; }
  .tagline { font-size: 15px; }
}

/* ナビ */
.navbar { border-top: 4px solid var(--navy); border-bottom: 1px solid var(--rule); display: flex; justify-content: space-between; align-items: stretch; gap: 8px; flex-wrap: wrap; }
.nav { display: flex; gap: 4px 36px; }
.nav a { display: block; padding: 14px 0 12px; color: var(--ink); font-weight: 700; font-size: 15.5px; border-bottom: 3px solid transparent; }
.nav a:hover { text-decoration: none; color: var(--navy-2); }
.nav a[aria-current="page"] { border-bottom-color: var(--navy); }
.navx { align-self: center; color: var(--ink-2); font-size: 15px; }
.navx b { color: var(--ink); margin-right: 6px; }

/* 号の見出しと日付タブ */
.edition { padding: 34px 0 8px; }
.edition-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.eyebrow { font-size: 13px; letter-spacing: .18em; color: var(--ink-2); }
.edition-head h2 { font-family: var(--serif); font-weight: 600; font-size: clamp(30px, 5vw, 50px); line-height: 1.3; margin: 4px 0 6px; color: var(--ink); display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.edition-head h2 a { color: inherit; }
.latest { font-family: var(--sans); font-size: 14px; font-weight: 700; color: var(--navy); border: 1.5px solid var(--navy); padding: 2px 12px; line-height: 1.6; }
.edition-head .count { color: var(--ink-2); font-size: 14px; }
.daytabs { display: flex; gap: 10px; flex-wrap: wrap; }
.daytabs a { display: block; padding: 10px 22px; border: 1px solid var(--rule); color: var(--ink); font-size: 16px; background: var(--card); }
.daytabs a:hover { text-decoration: none; border-color: var(--navy); }
.daytabs a[aria-current="true"] { background: var(--navy); color: var(--paper); border-color: var(--navy); }
.js .edition[hidden] { display: none; }

/* 帯（看板） */
.hero { display: grid; grid-template-columns: 1fr minmax(0, 34%); background: #0e2c45; color: #fff; margin-bottom: 40px; min-height: 230px; }
.hero .copy { padding: 40px 48px; display: flex; flex-direction: column; justify-content: center; }
.hero .copy p { margin: 0; font-family: var(--serif); font-weight: 600; font-size: clamp(26px, 3.4vw, 40px); line-height: 1.6; letter-spacing: .06em; }
.hero .copy small { display: block; margin-top: 14px; font-size: 15px; letter-spacing: .06em; opacity: .9; }
.hero .photo { position: relative; overflow: hidden; }
.hero .photo img { width: 100%; height: 100%; object-fit: cover; }
.hero .photo::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #0e2c45 0%, rgba(14,44,69,0) 35%); z-index: 1; }
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero .copy { padding: 26px 22px; }
  .hero .photo { height: 150px; }
  .hero .photo::before { background: linear-gradient(180deg, #0e2c45 0%, rgba(14,44,69,0) 40%); }
}

/* 本文と横の欄 */
.cols { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 0 48px; }
.cols > aside { border-left: 1px solid var(--rule); padding-left: 44px; }
@media (max-width: 960px) {
  .cols { grid-template-columns: 1fr; }
  .cols > aside { border-left: 0; padding-left: 0; }
}

.section { margin: 0 0 44px; }
.section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; border-top: 3px solid var(--navy); padding-top: 14px; margin: 0 0 22px; }
.section-title h3 { margin: 0; font-family: var(--serif); font-size: 28px; font-weight: 700; color: var(--ink); display: flex; align-items: baseline; gap: 14px; }
.section-title .no { font-family: var(--sans); font-size: 15px; font-weight: 400; color: var(--ink-3); }
.section-title .note { font-size: 13.5px; color: var(--ink-2); }

/* 記事の行（写真＋文） */
.story { display: grid; grid-template-columns: minmax(0, 36%) minmax(0, 1fr); gap: 18px 32px; padding: 0 0 26px; margin: 0 0 26px; border-bottom: 1px solid var(--rule); }
.story:last-child { border-bottom: 0; margin-bottom: 0; }
.story .thumb { aspect-ratio: 16 / 9; background: var(--quote); overflow: hidden; border-bottom: 3px solid var(--navy-2); }
.story .thumb img { width: 100%; height: 100%; object-fit: cover; }
.story .kicker { display: flex; gap: 14px; align-items: baseline; font-size: 14px; color: var(--ink-2); margin-bottom: 6px; }
.story .kicker .hot { color: var(--red); font-weight: 700; }
.story .kicker .type { color: var(--navy); font-weight: 700; }
.story h4 { margin: 0 0 10px; font-family: var(--serif); font-weight: 700; font-size: clamp(19px, 2.2vw, 25px); line-height: 1.55; }
.story h4 a { color: var(--ink); }
.story p { margin: 0 0 10px; color: var(--ink-2); font-size: 15.5px; }
.story .meta { display: flex; gap: 6px 16px; flex-wrap: wrap; font-size: 13.5px; }
.story .meta .src { color: var(--ink-3); }
.story.nothumb { grid-template-columns: 1fr; }
@media (max-width: 640px) { .story { grid-template-columns: 1fr; } }
.empty { color: var(--ink-3); font-size: 14.5px; margin: 0; }

/* 昨日の人気ネタ（横の欄） */
.side-title { border-top: 3px solid var(--navy); padding-top: 14px; }
.side-title h3 { margin: 0; font-family: var(--serif); font-size: 26px; font-weight: 700; }
.side-title p { margin: 6px 0 0; font-size: 14px; color: var(--ink-2); }
.trend { list-style: none; margin: 18px 0 0; padding: 0; counter-reset: t; }
.trend li { padding: 18px 0 20px; border-bottom: 1px solid var(--rule); }
.trend li:last-child { border-bottom: 0; }
.trend .n { font-family: var(--serif); font-size: 40px; line-height: 1.1; color: var(--navy-2); }
.trend .who { font-size: 14px; color: var(--ink-2); margin: 6px 0 8px; }
.trend .q { font-family: var(--serif); font-weight: 700; font-size: 17px; line-height: 1.6; margin: 0 0 8px; }
.trend .q a { color: var(--ink); }
.trend .stats { font-size: 13.5px; color: var(--ink-2); display: flex; gap: 16px; flex-wrap: wrap; }

/* 記事ページ */
.article { max-width: 780px; padding: 34px 0 40px; }
.crumbs { font-size: 13.5px; color: var(--ink-2); margin-bottom: 12px; }
.article .kicker { font-size: 14px; color: var(--navy); font-weight: 700; }
.article .kicker .hot { color: var(--red); }
.article h1 { font-family: var(--serif); font-weight: 700; font-size: clamp(26px, 4vw, 36px); line-height: 1.5; margin: 6px 0 20px; }
.article .heroimg { margin-bottom: 24px; border-bottom: 3px solid var(--navy-2); }
.article .lead p { font-size: 17px; margin: 0 0 12px; }
.block { margin-top: 34px; }
.block h2 { font-family: var(--serif); font-size: 20px; margin: 0 0 12px; border-top: 3px solid var(--navy); padding-top: 10px; }
blockquote { margin: 0; background: var(--quote); border-left: 3px solid var(--navy-2); padding: 14px 18px; font-size: 14.5px; color: var(--ink-2); white-space: pre-wrap; word-break: break-word; }
blockquote cite { display: block; margin-top: 8px; font-style: normal; font-size: 13px; }
.sources { margin: 0; padding-left: 1.2em; }
.sources li { word-break: break-all; }
.related { list-style: none; padding: 0; margin: 0; }
.related li { padding: 10px 0; border-bottom: 1px solid var(--rule); }
.related a { color: var(--ink); font-family: var(--serif); font-weight: 600; }
.related .sec { font-size: 12.5px; color: var(--navy); font-weight: 700; margin-right: 10px; }
.share { display: inline-block; font-size: 15px; padding: 8px 18px; background: var(--navy); color: var(--paper); }
.share:hover { text-decoration: none; opacity: .9; }

/* 過去の号・編集方針 */
.page { max-width: 780px; padding: 34px 0 40px; }
.page h1 { font-family: var(--serif); font-size: 34px; margin: 0 0 20px; }
.page h2 { font-family: var(--serif); font-size: 21px; margin: 32px 0 8px; border-top: 3px solid var(--navy); padding-top: 10px; }
.days { list-style: none; padding: 0; margin: 0; border-top: 3px solid var(--navy); }
.days li { display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--rule); padding: 14px 0; }
.days a { font-family: var(--serif); font-weight: 600; font-size: 18px; color: var(--ink); }
.days .c { color: var(--ink-2); font-size: 14px; }

.footer { background: var(--navy); color: #d7e1ea; margin-top: 40px; padding: 26px 0 34px; font-size: 13.5px; }
.footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.footer a { color: #fff; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .footer { background: #0a121a; } }
.hero picture { display: block; height: 100%; }
@media (max-width: 640px) { .navx { display: none; } .topbar { font-size: 11.5px; } }

/* Webアプリ段（2026-10-07）: 保存・既読・ホーム画面への追加 */
button.save { font: inherit; font-size: 13px; line-height: 1.4; padding: 3px 12px; border: 1px solid var(--navy); background: transparent; color: var(--navy); cursor: pointer; border-radius: 2px; }
button.save:hover { background: var(--navy-soft); }
button.save[aria-pressed="true"] { background: var(--navy); color: var(--paper); }
.story .meta { align-items: center; }
.story .meta button.save { margin-left: auto; }
.story.is-read h4 a { color: var(--ink-3); }
.readmark { font-size: 12px; color: var(--ink-3); border: 1px solid var(--rule); padding: 0 6px; line-height: 1.6; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.actions button.save { font-size: 15px; padding: 7px 18px; }
.page .lede { color: var(--ink-2); margin: -8px 0 24px; }
.install { display: flex; align-items: center; gap: 12px; margin-top: 16px; padding: 10px 14px; background: var(--navy-soft); border-left: 4px solid var(--navy); font-size: 14px; }
.install[hidden] { display: none; }
.install .msg { flex: 1; }
.install .go { font: inherit; font-size: 14px; padding: 5px 14px; background: var(--navy); color: var(--paper); border: 0; cursor: pointer; }
.install .close { font: inherit; font-size: 18px; line-height: 1; background: none; border: 0; color: var(--ink-2); cursor: pointer; padding: 4px 6px; }