/* AIニュース: 公式サイトのレイアウトを土台に、一覧・記事ページの部品をまとめたもの */

.column-page {
    background: #fbfcff;
}

.column-main {
    padding-top: 80px;
}

.column-hero {
    padding: 72px 24px 64px;
    background:
        radial-gradient(circle at 88% 12%, rgba(7, 92, 250, 0.10), transparent 34%),
        linear-gradient(145deg, #ffffff, #f3f7ff);
    border-bottom: 1px solid #e3eaf6;
}

.column-hero__inner,
.column-list,
.article-layout {
    width: min(1120px, 100%);
    margin: 0 auto;
}

.column-eyebrow,
.article-category {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
    color: #075cfa;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.column-eyebrow::before,
.article-category::before {
    content: "";
    width: 28px;
    height: 2px;
    background: #075cfa;
}

.column-hero h1 {
    max-width: 760px;
    margin: 0 0 18px;
    color: #08285f;
    font-size: clamp(2.25rem, 5vw, 4rem);
    line-height: 1.25;
    letter-spacing: -0.04em;
}

.column-hero p {
    max-width: 700px;
    color: #4e6587;
    font-size: 1.05rem;
    line-height: 1.9;
}

.column-list {
    padding: 64px 24px 88px;
}

.column-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.column-card {
    display: flex;
    min-height: 100%;
    flex-direction: column;
    padding: 28px;
    color: #29466f;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 20px;
    box-shadow: 0 10px 28px rgba(8, 43, 104, 0.055);
}

.column-card:hover {
    color: #29466f;
    border-color: #b9cff6;
    box-shadow: 0 16px 34px rgba(8, 43, 104, 0.10);
    transform: translateY(-3px);
}

.column-card__tag {
    align-self: flex-start;
    margin-bottom: 16px;
    padding: 5px 10px;
    color: #075cfa;
    background: #edf4ff;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 800;
}

.column-card h3 {
    margin-bottom: 12px;
    color: #08285f;
    font-size: 1.18rem;
    line-height: 1.55;
    line-break: strict;
    word-break: auto-phrase;
    text-wrap: pretty;
}

.column-card p {
    margin-bottom: 22px;
    color: #60779c;
    font-size: 0.9rem;
    line-height: 1.75;
}

.column-card__link {
    margin-top: auto;
    color: #075cfa;
    font-size: 0.86rem;
    font-weight: 800;
}

.article-hero {
    padding: 58px 24px 46px;
    background: linear-gradient(145deg, #ffffff, #f4f8ff);
    border-bottom: 1px solid #e3eaf6;
}

.article-hero__inner {
    width: min(920px, 100%);
    margin: 0 auto;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 34px;
    color: #7183a0;
    font-size: 0.78rem;
}

.breadcrumb a {
    color: #526b92;
}

.article-hero h1 {
    max-width: 850px;
    margin: 0 0 22px;
    color: #08285f;
    font-size: clamp(2rem, 4.4vw, 3.35rem);
    line-height: 1.35;
    letter-spacing: -0.035em;
}

.article-lead {
    max-width: 760px;
    margin-bottom: 24px;
    color: #4e6587;
    font-size: 1.04rem;
    line-height: 1.95;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    color: #7183a0;
    font-size: 0.78rem;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 760px) 280px;
    align-items: start;
    justify-content: space-between;
    gap: 56px;
    padding: 56px 24px 88px;
}

.article-body {
    min-width: 0;
    color: #243f67;
    font-size: 1rem;
    line-height: 2;
}

.article-body h2 {
    margin: 2.8em 0 0.9em;
    padding-bottom: 0.45em;
    color: #08285f;
    font-size: clamp(1.45rem, 3vw, 1.9rem);
    line-height: 1.5;
    border-bottom: 2px solid #dbe7fb;
}

.article-body h2:first-child {
    margin-top: 0;
}

.article-body h3 {
    margin: 2em 0 0.65em;
    color: #0a397c;
    font-size: 1.22rem;
    line-height: 1.55;
}

.article-body p + p {
    margin-top: 1.2em;
}

.article-body ul,
.article-body ol {
    margin: 1.2em 0;
    padding-left: 1.4em;
}

.article-body li + li {
    margin-top: 0.55em;
}

.article-note {
    margin: 2em 0;
    padding: 22px 24px;
    background: #f3f7ff;
    border: 1px solid #dbe7fb;
    border-radius: 16px;
}

.article-note strong {
    display: block;
    margin-bottom: 6px;
    color: #075cfa;
}

.article-cta {
    margin-top: 54px;
    padding: 30px;
    color: #fff;
    background: linear-gradient(125deg, #075cfa, #073db3);
    border-radius: 22px;
}

.article-cta h2 {
    margin: 0 0 10px;
    padding: 0;
    color: #fff;
    border: 0;
}

.article-cta p {
    color: rgba(255, 255, 255, 0.86);
}

.article-cta a {
    display: inline-flex;
    margin-top: 20px;
    padding: 13px 22px;
    color: #075cfa;
    background: #fff;
    border-radius: 999px;
    font-weight: 800;
}

.article-side {
    position: sticky;
    top: 106px;
    padding: 24px;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 18px;
}

.article-side h2 {
    margin-bottom: 14px;
    color: #08285f;
    font-size: 1rem;
}

.article-side ul {
    list-style: none;
}

.article-side li + li {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid #edf1f7;
}

.article-side a {
    color: #405b83;
    font-size: 0.84rem;
    line-height: 1.55;
}

@media (max-width: 900px) {
    .column-grid { grid-template-columns: 1fr; }
    .article-layout { grid-template-columns: 1fr; }
    .article-side { position: static; }
}

@media (max-width: 600px) {
    .column-main { padding-top: 68px; }
    .column-hero { padding: 48px 18px 44px; }
    .column-list { padding: 42px 16px 64px; }
    .column-card { padding: 22px; border-radius: 16px; }
    .article-hero { padding: 34px 18px 32px; }
    .breadcrumb { margin-bottom: 24px; }
    .article-layout { gap: 32px; padding: 36px 18px 64px; }
    .article-body { font-size: 0.95rem; line-height: 1.95; }
    .article-note { padding: 18px; }
    .article-cta { padding: 24px 20px; }
}

/* ここから下はAIニュース固有の部品 */

/*
 * hidden属性を確実に効かせる。
 * .column-grid は display:grid、.ainews-cats は display:flex を指定しており、
 * ブラウザ既定の [hidden]{display:none} より詳細度が高いため、そのままでは隠れない。
 */
[hidden] {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

/* ---- 一覧ヘッダー ---- */

.ainews-search {
    position: relative;
    max-width: 460px;
    margin-top: 26px;
}

.ainews-search input {
    width: 100%;
    padding: 13px 46px 13px 18px;
    color: #08285f;
    background: #fff;
    border: 1px solid #cfdcf3;
    border-radius: 999px;
    font-family: inherit;
    font-size: 0.95rem;
}

.ainews-search input:focus {
    outline: 2px solid #075cfa;
    outline-offset: 1px;
}

.ainews-search__clear {
    position: absolute;
    top: 50%;
    right: 8px;
    width: 30px;
    height: 30px;
    padding: 0;
    color: #60779c;
    background: #eef3fb;
    border: 0;
    border-radius: 50%;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    transform: translateY(-50%);
}

.ainews-search__clear:hover {
    color: #08285f;
    background: #dfe9f8;
}

.ainews-updated {
    margin-top: 14px;
    color: #7183a0;
    font-size: 0.78rem;
}

/* ---- カテゴリチップ ---- */

.ainews-cats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.ainews-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 15px;
    color: #405b83;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
}

.ainews-chip span {
    color: #93a5c1;
    font-size: 0.74rem;
}

.ainews-chip:hover {
    color: #075cfa;
    border-color: #b9cff6;
}

.ainews-chip.is-current {
    color: #fff;
    background: #075cfa;
    border-color: #075cfa;
}

.ainews-chip.is-current span {
    color: rgba(255, 255, 255, 0.75);
}

/* ---- サムネイル付きカード ---- */

.ainews-card {
    padding: 0;
    overflow: hidden;
}

/*
 * サムネイルの縦横比は「画像そのもの」に指定する。
 *
 * 枠(span)側に aspect-ratio を付けると、.column-card が縦方向のflexであるため
 * flexアイテムの min-height:auto が働き、画像の実寸が最低高さとして採用されてしまう。
 * その結果、4:3の画像を持つカードだけサムネイルが縦に伸びて高さがばらついていた。
 * 画像に aspect-ratio を持たせれば、親の都合に左右されず必ず16:9で表示される。
 */
.ainews-card__thumb {
    display: block;
    flex-shrink: 0;
    overflow: hidden;
    background: #eef3fb;
}

.ainews-card__thumb img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: center;
}

.ainews-card > :not(.ainews-card__thumb) {
    margin-left: 24px;
    margin-right: 24px;
}

.ainews-card .column-card__tag {
    margin-top: 20px;
}

.ainews-card h3 {
    font-size: 1.08rem;
}

.ainews-card p {
    margin-bottom: 14px;
}

.ainews-card__meta {
    display: block;
    margin-bottom: 16px;
    color: #93a5c1;
    font-size: 0.76rem;
}

.ainews-card .column-card__link {
    margin-bottom: 22px;
}

/* ---- 検索結果 ---- */

.ainews-result[hidden] {
    display: none;
}

.ainews-result__count {
    margin-bottom: 18px;
    color: #60779c;
    font-size: 0.88rem;
}

.ainews-empty {
    padding: 48px 0;
    color: #7183a0;
    text-align: center;
}

/* ---- ページ送り ---- */

.ainews-pager {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-top: 48px;
}

.ainews-pager a,
.ainews-pager span {
    min-width: 42px;
    padding: 9px 14px;
    color: #405b83;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 10px;
    font-size: 0.86rem;
    font-weight: 700;
    text-align: center;
}

.ainews-pager a:hover {
    color: #075cfa;
    border-color: #b9cff6;
}

.ainews-pager .is-current {
    color: #fff;
    background: #075cfa;
    border-color: #075cfa;
}

/* ---- 記事本文 ---- */

/*
 * 出典元の画像は縦横比がまちまち(16:9・4:3・正方形など)で、そのまま置くと
 * 記事ごとに見え方が変わる。枠を16:9に固定し、はみ出す分は切り取って埋める。
 * 一覧のサムネイルと同じ扱いなので、カードと記事で同じ絵が出る。
 * 小さすぎる画像・縦長の画像は取り込み時に弾いているため、極端な拡大や切り取りは起きない。
 */
.ainews-hero-image {
    display: block;
    margin: 0 0 28px;
    overflow: hidden;
    background: #eef3fb;
    border: 1px solid #dce6f5;
    border-radius: 18px;
}

.ainews-hero-image img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: center;
}

.ainews-notice {
    font-size: 0.88rem;
    line-height: 1.8;
}

.ainews-points {
    margin: 2em 0;
    padding: 24px 26px;
    background: linear-gradient(135deg, #f2f7ff, #eaf1ff);
    border: 1px solid #d7e4fb;
    border-radius: 18px;
}

.ainews-points strong {
    display: block;
    margin-bottom: 12px;
    color: #075cfa;
    font-size: 0.84rem;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.ainews-points ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.ainews-points li {
    position: relative;
    padding-left: 22px;
    font-size: 0.96rem;
    line-height: 1.85;
}

.ainews-points li + li {
    margin-top: 9px;
}

.ainews-points li::before {
    position: absolute;
    top: 0.72em;
    left: 4px;
    width: 7px;
    height: 7px;
    background: #075cfa;
    border-radius: 50%;
    content: "";
}

.ainews-quote {
    margin: 2.2em 0;
    overflow: hidden;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 16px;
}

.ainews-quote figcaption {
    padding: 9px 20px;
    color: #60779c;
    background: #f3f7ff;
    border-bottom: 1px solid #dce6f5;
    font-size: 0.76rem;
    font-weight: 800;
}

.ainews-quote blockquote {
    margin: 0;
    padding: 18px 20px 6px;
    color: #60779c;
    font-size: 0.92rem;
    font-style: italic;
    line-height: 1.85;
}

.ainews-quote p {
    margin: 0;
    padding: 0 20px 18px;
    font-size: 0.95rem;
}

.ainews-why {
    margin: 2.4em 0;
    padding: 24px 26px;
    background: #fff;
    border: 1px solid #dce6f5;
    border-left: 4px solid #075cfa;
    border-radius: 16px;
}

.ainews-why h2 {
    margin: 0 0 10px;
    padding: 0;
    color: #075cfa;
    font-size: 1.02rem;
    border: 0;
}

.ainews-why p {
    font-size: 0.97rem;
}

.ainews-glossary {
    margin: 2.4em 0;
}

.ainews-glossary h2 {
    margin-bottom: 14px;
    font-size: 1.15rem;
}

.ainews-glossary dl {
    margin: 0;
    padding: 22px 24px;
    background: #f9fbff;
    border: 1px solid #e4ecf8;
    border-radius: 16px;
}

.ainews-glossary dt {
    color: #08285f;
    font-weight: 800;
}

.ainews-glossary dd {
    margin: 4px 0 0;
    color: #60779c;
    font-size: 0.9rem;
    line-height: 1.8;
}

.ainews-glossary dd + dt {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #e4ecf8;
}

.ainews-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 2.4em 0 0;
}

.ainews-tags a {
    padding: 6px 14px;
    color: #405b83;
    background: #fff;
    border: 1px solid #dce6f5;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
}

.ainews-tags a:hover {
    color: #075cfa;
    border-color: #b9cff6;
}

.ainews-source {
    margin: 2.4em 0 0;
    padding: 22px 24px;
    background: #f3f7ff;
    border: 1px solid #dbe7fb;
    border-radius: 16px;
}

.ainews-source h2 {
    margin: 0 0 12px;
    padding: 0;
    color: #60779c;
    font-size: 0.84rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    border: 0;
}

.ainews-source__title {
    color: #08285f;
    font-weight: 700;
    line-height: 1.6;
}

.ainews-source__meta {
    margin-top: 5px;
    color: #7183a0;
    font-size: 0.82rem;
}

.ainews-source a {
    color: #075cfa;
    font-size: 0.84rem;
    word-break: break-all;
}

.article-side + .article-side h2,
.article-side h2 + ul + h2 {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid #edf1f7;
}

@media (max-width: 600px) {
    .ainews-card > :not(.ainews-card__thumb) { margin-left: 18px; margin-right: 18px; }
    .ainews-points { padding: 20px; }
    .ainews-why { padding: 20px; }
    .ainews-glossary dl { padding: 18px; }
    .ainews-source { padding: 18px; }
}