:root { --bg:#fff; --fg:#1f2937; --muted:#6b7280; --primary:#2563eb; --border:#e5e7eb; }
[data-theme="dark"]{ --bg:#0b1220; --fg:#e5e7eb; --muted:#9ca3af; --primary:#60a5fa; --border:#1f2937; }
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif}
.container{max-width:960px;margin:0 auto;padding:1rem}
header{border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.nav a{color:var(--fg);text-decoration:none;font-weight:600}
.logo{display:flex;align-items:center;gap:.5rem}
.logo img{height:28px}
.menu{display:flex;gap:1rem;flex-wrap:wrap}
.theme-toggle{border:1px solid var(--border);background:transparent;color:var(--fg);padding:.4rem .6rem;border-radius:.4rem;cursor:pointer}
main{padding:2rem 0}
.hero h1{font-size:2rem;margin:0 0 .5rem}
.card{border:1px solid var(--border);border-radius:.6rem;padding:1rem;margin:1rem 0}
.card h2{margin:0 0 .5rem;font-size:1.25rem}
.card .meta{color:var(--muted);font-size:.9rem}
.card a.readmore{color:var(--primary);font-weight:600}
footer{border-top:1px solid var(--border);padding:2rem 0;color:var(--muted)}
.tag{display:inline-block;font-size:.8rem;color:var(--primary);background:rgba(37,99,235,.08);padding:.2rem .5rem;border-radius:.3rem;margin-right:.3rem}
.search{display:flex;gap:.5rem;margin-top:1rem}
.search input{flex:1;padding:.6rem .8rem;border:1px solid var(--border);background:transparent;color:var(--fg);border-radius:.4rem}
.search button{padding:.6rem .8rem;border:1px solid var(--border);background:var(--primary);color:#fff;border-radius:.4rem}
.article h1{margin-top:0}
.article .meta{color:var(--muted)}
pre,code{background:rgba(2,6,23,.07);color:var(--fg);padding:.2rem .4rem;border-radius:.3rem}
pre{padding:.8rem;overflow:auto}

/* ホームページ2カラムレイアウト */
.home-layout{display:grid;grid-template-columns:1fr 320px;gap:2rem;align-items:start}
.home-main{min-width:0}
.home-sidebar{position:sticky;top:1rem}

/* ヒーローセクション */
.home-hero{padding:2rem 0 1.5rem}
.home-hero h1{font-size:2rem;margin:0 0 .75rem;font-weight:700;background:linear-gradient(135deg,var(--primary),#8b5cf6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.home-description{font-size:1rem;color:var(--muted);margin:0;line-height:1.6}

/* サイドバーウィジェット */
.sidebar-widget{background:var(--bg);border:1px solid var(--border);border-radius:.75rem;padding:1.25rem;margin-bottom:1.5rem}
.widget-title{font-size:1rem;font-weight:600;margin:0 0 1rem;padding-bottom:.75rem;border-bottom:1px solid var(--border)}

/* 検索フォーム（サイドバー用） */
.home-search{position:relative}
.search-container{position:relative}
.search-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}
.search-container input{width:100%;padding:.75rem .75rem .75rem 2.5rem;border:1px solid var(--border);background:var(--bg);color:var(--fg);border-radius:.5rem;font-size:.875rem;transition:all .2s}
.search-container input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(37,99,235,.1)}
.search-results{position:absolute;top:100%;left:0;right:0;margin-top:.5rem;background:var(--bg);border:1px solid var(--border);border-radius:.5rem;box-shadow:0 8px 20px rgba(0,0,0,.1);max-height:350px;overflow-y:auto;z-index:100}
.search-results.hidden{display:none}
.search-result-item{display:block;padding:.75rem;border-bottom:1px solid var(--border);text-decoration:none;color:var(--fg);transition:background .15s;font-size:.875rem}
.search-result-item:last-child{border-bottom:none}
.search-result-item:hover{background:rgba(37,99,235,.05)}
.result-title{font-weight:600;margin-bottom:.25rem;font-size:.875rem}
.result-summary{font-size:.8rem;color:var(--muted);margin-bottom:.375rem;line-height:1.4}
.result-tags{display:flex;gap:.25rem;flex-wrap:wrap}
.no-results{padding:1.5rem;text-align:center;color:var(--muted);font-size:.875rem}

/* タグ一覧（サイドバー用） */
.widget-tags{display:flex;flex-direction:column;gap:.5rem}
.widget-tag{display:flex;align-items:center;justify-content:space-between;gap:.5rem;padding:.6rem .8rem;background:rgba(37,99,235,.08);border:1px solid var(--border);border-radius:.4rem;color:var(--primary);text-decoration:none;font-size:.9rem;font-weight:500;transition:all .2s}
.widget-tag:hover{background:var(--primary);color:#fff;transform:translateX(3px)}
.widget-tag-count{font-size:.8em;opacity:.7;background:rgba(0,0,0,.05);padding:.15rem .4rem;border-radius:10px}
.widget-tag:hover .widget-tag-count{opacity:1;background:rgba(255,255,255,.2)}

/* クイックリンク（サイドバー用） */
.quick-links{display:flex;flex-direction:column;gap:.75rem}
.quick-link-item{display:flex;align-items:center;gap:.75rem;padding:.875rem;border:1px solid var(--border);border-radius:.5rem;text-decoration:none;color:var(--fg);transition:all .2s;background:var(--bg);font-size:.875rem}
.quick-link-item:hover{border-color:var(--primary);background:rgba(37,99,235,.03);transform:translateX(3px)}
.quick-link-item svg{flex-shrink:0;color:var(--primary)}
.quick-link-item span{font-weight:500}

/* 最新記事セクション */
.recent-posts{margin:4rem 0}
.section-title{font-size:1.875rem;font-weight:700;margin:0 0 2rem;padding-bottom:.75rem;border-bottom:2px solid var(--border)}
.post-list{display:grid;gap:1.5rem}
.post-card{padding:1.5rem;border:1px solid var(--border);border-radius:.75rem;transition:all .2s}
.post-card:hover{border-color:var(--primary);box-shadow:0 4px 12px rgba(0,0,0,.08)}
.post-meta{display:flex;align-items:center;gap:1rem;margin-bottom:.75rem;font-size:.875rem;color:var(--muted)}
.post-tags{display:flex;gap:.375rem;flex-wrap:wrap}
.post-title{margin:0 0 .5rem;font-size:1.25rem;font-weight:600}
.post-title a{color:var(--fg);text-decoration:none}
.post-title a:hover{color:var(--primary)}
.post-summary{margin:0;color:var(--muted);line-height:1.6}
.view-all{text-align:center;margin-top:2rem}
.btn-primary{display:inline-block;padding:.75rem 2rem;background:var(--primary);color:#fff;text-decoration:none;border-radius:.5rem;font-weight:600;transition:all .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 16px rgba(37,99,235,.3)}

/* ハンバーガーメニューボタン（スマホのみ） */
.sidebar-toggle{display:none;position:fixed;bottom:1.5rem;right:1.5rem;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;border:none;box-shadow:0 4px 12px rgba(37,99,235,.4);cursor:pointer;z-index:1000;transition:all .3s}
.sidebar-toggle:hover{transform:scale(1.1);box-shadow:0 6px 16px rgba(37,99,235,.5)}
.sidebar-toggle svg{display:block;margin:auto}

@media(max-width:768px){
  .home-layout{grid-template-columns:1fr;gap:1.5rem}
  .home-sidebar{position:static;order:-1}
  .sidebar-widget{margin-bottom:1rem}
}

@media(max-width:640px){
  .hero h1{font-size:1.5rem}
  .home-hero h1{font-size:1.5rem}
  .home-description{font-size:.9rem}
  .section-title{font-size:1.5rem}

  /* ハンバーガーメニュー表示 */
  .sidebar-toggle{display:flex;align-items:center;justify-content:center}

  /* サイドバーをスライドメニュー化 */
  .home-sidebar{position:fixed;top:0;right:-100%;width:85%;max-width:320px;height:100vh;background:var(--bg);box-shadow:-4px 0 12px rgba(0,0,0,.1);overflow-y:auto;z-index:999;transition:right .3s;padding:1rem;display:block!important}
  .home-sidebar.open{right:0}

  /* オーバーレイ */
  .home-sidebar.open::before{content:'';position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.5);z-index:-1}
}