/* IUMe 受験・勉強情報ブログ共通スタイル。既存のブランド変数とコンポーネントを継承します。 */
.column-page{background:#fff;color:var(--ink)}
.column-page .site-header{z-index:80}
.column-page .header-main-links a[aria-current="page"]{color:var(--gold)}
.column-hero{position:relative;overflow:hidden;padding:62px 24px 52px;background:linear-gradient(135deg,#fff 0%,#fff 58%,var(--blue) 100%)}
.column-hero:after{content:"COLUMN";position:absolute;right:-.03em;bottom:-.18em;color:rgba(10,45,95,.045);font-family:Arial,sans-serif;font-size:clamp(7rem,18vw,15rem);font-weight:900;line-height:1;letter-spacing:-.06em;pointer-events:none}
.column-hero-inner{position:relative;z-index:1;max-width:1160px;margin:auto}
.column-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:0 0 28px;color:var(--muted);font-size:.78rem}
.column-breadcrumb a{text-decoration:none}.column-breadcrumb a:hover{color:var(--gold)}
.column-kicker{margin:0 0 14px;color:var(--gold);font-family:"Noto Serif JP",serif;font-size:1.15rem;font-weight:700;letter-spacing:.08em}
.column-hero h1{max-width:760px;margin:0 0 20px;font-size:clamp(2.7rem,6vw,5rem);line-height:1.25}
#column-title{max-width:none;white-space:nowrap}
.column-hero-lead{max-width:700px;margin:0;color:#4d5c70;font-size:1.03rem;line-height:2}
.column-main{padding:90px 24px 112px}
.column-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:60px;max-width:1160px;margin:auto;align-items:start}
.column-tools{display:grid;gap:20px;margin-bottom:40px;padding-bottom:32px;border-bottom:1px solid var(--line)}
.column-search-label{display:block;color:var(--navy);font-size:.82rem;font-weight:700}
.column-search-wrap{position:relative;display:block;margin-top:9px}
.column-search-wrap:before{content:"";position:absolute;top:50%;left:17px;width:12px;height:12px;border:2px solid var(--navy);border-radius:50%;transform:translateY(-60%)}
.column-search-wrap:after{content:"";position:absolute;top:50%;left:30px;width:7px;height:2px;background:var(--navy);transform:translateY(5px) rotate(45deg)}
.column-search-wrap input{width:100%;min-height:50px;padding:12px 16px 12px 48px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--ink);font:inherit;font-size:.9rem;outline:none}
.column-search-wrap input:focus{border-color:var(--navy);box-shadow:0 0 0 3px rgba(10,45,95,.08)}
.column-filters{display:flex;flex-wrap:wrap;gap:9px}
.column-filter{padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--navy);font:inherit;font-size:.75rem;font-weight:700;cursor:pointer;transition:.2s ease}
.column-filter:hover,.column-filter[aria-pressed="true"]{border-color:var(--navy);background:var(--navy);color:#fff}
.column-result-status{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.column-section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}
.column-section-title h2{margin:0;font-size:1.85rem;text-align:left}
.column-section-title p{margin:0;color:var(--muted);font-size:.78rem}
.column-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.column-card{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 10px 28px rgba(6,27,58,.06);transition:transform .25s ease,box-shadow .25s ease}
.column-card:hover{transform:translateY(-4px);box-shadow:0 17px 38px rgba(6,27,58,.1)}
.column-card-image{display:block;overflow:hidden;aspect-ratio:16/9;background:var(--blue)}
.column-card-image img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease}
.column-card:hover .column-card-image img{transform:scale(1.025)}
.column-card-body{padding:25px}
.column-card-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;color:var(--muted);font-size:.69rem}
.column-card-meta span{padding:3px 9px;border:1px solid rgba(216,161,29,.55);border-radius:999px;color:var(--gold);font-weight:700}
.column-card h2{margin:0 0 12px;font-family:"Noto Serif JP",serif;font-size:1.15rem;line-height:1.65;text-align:left}
.column-card h2 a{text-decoration:none}.column-card h2 a:hover{color:var(--gold)}
.column-card-body>p{margin:0;color:var(--muted);font-size:.82rem;line-height:1.8}
.column-read-more{display:inline-flex;gap:9px;align-items:center;margin-top:18px;color:var(--navy);font-size:.78rem;font-weight:700;text-decoration:none}
.column-read-more span{color:var(--gold);transition:transform .2s}.column-read-more:hover span{transform:translateX(4px)}
.column-empty{grid-column:1/-1;padding:46px 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);text-align:center}
.column-sidebar{position:sticky;top:112px;display:grid;gap:40px}
.column-side-section{padding-top:18px;border-top:2px solid var(--navy)}
.column-side-section h2{margin:0 0 18px;font-family:"Noto Serif JP",serif;font-size:1.2rem;text-align:left}
.column-compact-list{display:grid}
.column-compact-link{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line);text-decoration:none}
.column-compact-link>span{color:var(--gold);font-family:"Noto Serif JP",serif;font-size:1.15rem}
.column-compact-link small{display:block;margin-bottom:4px;color:var(--muted);font-size:.62rem}
.column-compact-link strong{display:block;color:var(--deep);font-size:.76rem;line-height:1.65}
.column-compact-link:hover strong{color:var(--gold)}
.column-related-area{max-width:1160px;margin:86px auto 0;padding-top:56px;border-top:1px solid var(--line)}
.column-related-area h2{margin-bottom:28px;font-size:1.9rem;text-align:left}
.column-related-intro{display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center;padding:34px 38px;border-radius:var(--radius);background:var(--cream)}
.column-related-intro h3{margin:0 0 8px;font-size:1.2rem}.column-related-intro p{margin:0;color:var(--muted);font-size:.86rem}

/* 記事共通 */
.article-hero{padding:42px 24px 58px;background:#fff}
.article-hero-inner{max-width:1040px;margin:auto}
.article-hero .column-breadcrumb{margin-bottom:36px}
.article-category{display:inline-block;margin-bottom:16px;padding:5px 11px;border:1px solid rgba(216,161,29,.55);border-radius:999px;color:var(--gold);font-size:.72rem;font-weight:700}
.article-hero h1{max-width:900px;margin:0 0 24px;font-size:clamp(2rem,4.7vw,3.75rem);line-height:1.42}
.article-dates{display:flex;gap:22px;margin:0;color:var(--muted);font-size:.74rem}
.article-eyecatch{max-width:1160px;margin:0 auto;padding:0 24px}
.article-eyecatch img{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:var(--radius)}
.article-layout{display:grid;grid-template-columns:230px minmax(0,740px);gap:70px;max-width:1040px;margin:72px auto 0;padding:0 24px 110px;align-items:start}
.article-toc{position:sticky;top:112px;padding:22px;border:1px solid var(--line);border-radius:18px;background:#fff}
.article-toc h2{margin:0 0 13px;font-family:"Noto Sans JP",sans-serif;font-size:.88rem;text-align:left}
.article-toc ol{display:grid;gap:9px;margin:0;padding-left:20px;color:var(--muted);font-size:.73rem;line-height:1.55}
.article-toc a{text-decoration:none}.article-toc a:hover,.article-toc a[aria-current="location"]{color:var(--gold)}
.article-body{min-width:0}
.article-lead{margin:0 0 52px;padding:28px 30px;border-left:3px solid var(--gold);background:var(--cream);color:#35445a;font-size:1rem;line-height:2}
.article-body section{scroll-margin-top:105px;margin-top:64px}
.article-body h2{margin:0 0 24px;padding-bottom:14px;border-bottom:1px solid var(--line);font-size:clamp(1.65rem,3vw,2.25rem);line-height:1.55;text-align:left}
.article-body h2:after{content:"";display:block;width:58px;height:2px;margin-top:14px;background:var(--gold)}
.article-body h3{margin:38px 0 15px;font-size:1.25rem}
.article-body p,.article-body li{color:#3f4e62;font-size:.96rem;line-height:2}
.article-body ul,.article-body ol{padding-left:1.4em}
.article-inline-image{margin:36px 0}
.article-inline-image img{width:100%;border-radius:18px}
.article-inline-image figcaption{margin-top:9px;color:var(--muted);font-size:.7rem;text-align:center}
.article-table-wrap{overflow-x:auto;margin:30px 0;-webkit-overflow-scrolling:touch}
.article-table{width:100%;min-width:640px;border-collapse:collapse;background:#fff;font-size:.82rem}
.article-table th,.article-table td{padding:16px;border:1px solid var(--line);text-align:left;vertical-align:top}
.article-table thead th{background:var(--navy);color:#fff}.article-table tbody th{width:24%;background:var(--blue);color:var(--navy)}
.article-point,.article-caution{margin:34px 0;padding:28px 30px;border-radius:18px}
.article-point{border:1px solid #cce1f2;background:var(--blue)}
.article-caution{border:1px solid #ead9a6;background:var(--cream)}
.article-point h3,.article-caution h3{margin:0 0 9px;font-size:1.05rem}.article-point p,.article-caution p{margin:0;font-size:.88rem}
.article-cta{margin-top:70px;padding:42px;border-radius:var(--radius);background:var(--deep);color:#fff}
.article-cta h2{border:0;color:#fff}.article-cta h2:after{background:var(--gold)}
.article-cta p{color:#d8e2ef}.article-cta-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:26px}.article-cta .button-secondary{border-color:#fff}
.article-related{margin-top:70px;padding-top:45px;border-top:1px solid var(--line)}
.article-related h2{font-size:1.7rem}.article-related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.article-related-card{padding:22px;border:1px solid var(--line);border-radius:18px;text-decoration:none}.article-related-card small{color:var(--gold)}.article-related-card strong{display:block;margin-top:7px;font-size:.88rem;line-height:1.65}
.article-pagination{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:55px;padding-top:30px;border-top:1px solid var(--line)}
.article-pagination a{padding:16px;color:var(--navy);font-size:.78rem;font-weight:700;text-decoration:none}.article-pagination a:last-child{text-align:right}
.article-template-note{margin:0 0 35px;padding:14px 18px;border:1px solid var(--line);border-radius:12px;background:var(--blue);color:var(--navy);font-size:.78rem}

@media(max-width:980px){
  .column-layout{grid-template-columns:1fr}.column-sidebar{position:static;grid-template-columns:1fr 1fr}.column-related-intro{grid-template-columns:1fr}
  .article-layout{grid-template-columns:1fr;gap:36px}.article-toc{position:static}.article-toc ol{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:680px){
  .column-hero{padding:40px 18px 35px}.column-hero:after{right:-.15em;bottom:-.03em;font-size:5.4rem}.column-breadcrumb{margin-bottom:20px}.column-kicker{font-size:.95rem}.column-hero h1{margin-bottom:14px;font-size:clamp(1.45rem,7.2vw,2.35rem)}.column-hero-lead{font-size:.88rem;line-height:1.75}
  .column-main{padding:62px 18px 82px}.column-tools{margin-bottom:30px}.column-filters{gap:7px}.column-filter{padding:7px 11px;font-size:.68rem}.column-section-title{align-items:start;flex-direction:column}.column-grid{grid-template-columns:1fr;gap:22px}.column-card-body{padding:21px}.column-card h2{font-size:1.06rem}.column-sidebar{grid-template-columns:1fr;gap:28px}.column-related-area{margin-top:58px;padding-top:42px}.column-related-intro{padding:27px 23px}
  .article-hero{padding:28px 18px 42px}.article-hero h1{font-size:2rem}.article-dates{gap:14px;flex-wrap:wrap}.article-eyecatch{padding:0 18px}.article-eyecatch img{aspect-ratio:16/10;border-radius:16px}.article-layout{margin-top:45px;padding:0 18px 82px}.article-toc{padding:19px}.article-toc ol{grid-template-columns:1fr}.article-lead{padding:22px 20px;font-size:.9rem}.article-body section{margin-top:48px}.article-body h2{font-size:1.55rem}.article-body h3{font-size:1.13rem}.article-body p,.article-body li{font-size:.9rem;line-height:1.9}.article-point,.article-caution{padding:22px 20px}.article-cta{padding:30px 22px}.article-cta-actions{display:grid}.article-related-grid{grid-template-columns:1fr}.article-pagination{grid-template-columns:1fr}.article-pagination a:last-child{text-align:left}
}
@media(prefers-reduced-motion:reduce){.column-card,.column-card-image img,.column-read-more span{transition:none}}