:root{
  --bg: #0f1115;
  --card:#171a21;
  --card-2:#1b1f27;
  --text:#e8ecf1;
  --muted:#9aa3af;
  --accent:#4f8cff;
  --accent-2:#7bdcff;
  --ok:#2ecc71;
  --warn:#f5a623;
  --danger:#ff4d4f;
  --ring: rgba(79,140,255,.45);
  --chip:#242a33;
  --chip-hover:#2a313c;
  --chip-active:#293a57;
  --shadow: 0 6px 24px rgba(0,0,0,.35), 0 2px 8px rgba(0,0,0,.25);
  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 10px;
  --gap: 14px;
}
@media (prefers-color-scheme: light){
  :root{
    --bg:#f7f8fb;
    --card:#ffffff;
    --card-2:#ffffff;
    --text:#0f141c;
    --muted:#5b6676;
    --accent:#2a64ff;
    --accent-2:#1fb6ff;
    --ring: rgba(42,100,255,.28);
    --chip:#eef2f7;
    --chip-hover:#e6ecf5;
    --chip-active:#dfe9fb;
    --shadow: 0 6px 24px rgba(16,24,40,.08), 0 2px 8px rgba(16,24,40,.06);
  }
}

/* Reset（必要最小限） */
*,*::before,*::after{ box-sizing:border-box }
html,body{ height:100% }
body{
  margin:0; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Meiryo, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  color:var(--text); background: radial-gradient(1200px 700px at 10% -10%, rgba(79,140,255,.12), transparent 60%), 
                     radial-gradient(800px 600px at 90% -20%, rgba(123,220,255,.12), transparent 55%),
                     var(--bg);
  letter-spacing:.2px;
}
a{ color:inherit; text-decoration:none }
img{ display:block; max-width:100% }
button{ font:inherit }

/* レイアウト */
.container{ max-width:1200px; margin-inline:auto; padding:20px; }
header.site{
  position:sticky; top:0; z-index:20;
  backdrop-filter: saturate(130%) blur(8px);
  background: linear-gradient(180deg, rgba(15,17,21,.75), rgba(15,17,21,.35));
  border-bottom: 1px solid rgba(255,255,255,.06);
}
@media (prefers-color-scheme: light){
  header.site{ background: linear-gradient(180deg, rgba(247,248,251,.85), rgba(247,248,251,.55)); border-bottom-color: rgba(16,24,40,.06); }
}

.brand{
  display:flex; align-items:center; gap:14px; padding:16px 20px;
}
.logo{
  width:42px; height:42px; border-radius:12px; display:grid; place-items:center; 
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color:white; font-weight:800; box-shadow: var(--shadow);
  letter-spacing:.5px;
  overflow: hidden;
}
.logo img{
  width: 100%; height: 100%; object-fit: cover; border-radius: 12px;
}
.title-wrap h1{ font-size: clamp(18px, 2.6vw, 28px); margin:0 0 2px }
.title-wrap h1 a{ color: inherit; text-decoration: none; }
.title-wrap h1 a:hover{ text-decoration: underline; text-underline-offset: 3px; }
.title-wrap p{ margin:0; color:var(--muted); font-size:14px }

.hero{
  margin-top:16px; background:var(--card); border-radius: var(--radius);
  padding:18px; box-shadow: var(--shadow); border:1px solid rgba(255,255,255,.04);
}
@media (prefers-color-scheme: light){ .hero{ border-color: rgba(16,24,40,.06); } }
.hero p{ margin:0 }
.hero .cta{ margin-top:10px; display:flex; gap:10px; flex-wrap:wrap }
.btn{
  display:inline-flex; align-items:center; gap:8px; border:1px solid transparent; border-radius: 999px; padding:10px 14px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color:#fff; box-shadow: var(--shadow); cursor:pointer;
}
.btn.secondary{
  background:var(--chip); color:var(--text); border-color:transparent;
}
.btn:hover{ filter: brightness(1.05) }
.btn.secondary:hover{ background:var(--chip-hover) }

/* コントロール */
.controls{
  position:sticky; top:0; z-index:15; margin-top:12px;
  background:var(--card); border:1px solid rgba(255,255,255,.04);
  @media (prefers-color-scheme: light){ border-color: rgba(16,24,40,.06) }
  border-radius: var(--radius); padding:10px; box-shadow: var(--shadow);
}
.control-row{
  display:flex; align-items:center; justify-content:space-between; gap:12px; flex-wrap:wrap;
}
@media (max-width:768px){
  .control-row{ flex-direction:column; align-items:stretch; gap:8px; }
}
.tabs{ display:flex; gap:6px; flex-wrap:wrap }
.tab{
  background:var(--chip); border:1px solid transparent; padding:6px 10px; border-radius: 999px; cursor:pointer;
  font-size:14px;
}
.tab[aria-selected="true"]{ background:var(--chip-active); outline:2px solid var(--ring) }
.search-group{
  display:flex; align-items:center; gap:8px;
}
@media (max-width:768px){
  .search-group{ width:100%; }
}
.search{
  display:flex; align-items:center; gap:8px; background:var(--card-2); border:1px solid rgba(255,255,255,.06);
  @media (prefers-color-scheme: light){ border-color: rgba(16,24,40,.06) }
  border-radius: 10px; padding:8px 10px; min-width:200px;
}
@media (max-width:768px){
  .search{ flex:1; min-width:auto; }
}
.search input{ flex:1; border:none; outline:none; background:transparent; color:var(--text); font-size:14px }
.btn-search{
  background:var(--accent); color:white; border:none; border-radius:8px; padding:8px 12px;
  cursor:pointer; font-size:14px; white-space:nowrap;
}
.btn-search:hover{ filter: brightness(1.05) }
.clear{
  display:inline-flex; align-items:center; background:var(--chip); border:1px solid transparent;
  border-radius: 8px; padding:8px; cursor:pointer; color:var(--muted);
}
.clear:hover{ background:var(--chip-hover) }

/* リスト */
.summary{ margin:16px 4px 8px; color:var(--muted); font-size:14px }
.grid{
  display:grid; grid-template-columns: repeat(1,minmax(0,1fr)); gap: var(--gap);
}
@media (min-width:720px){ .grid{ grid-template-columns: repeat(2,minmax(0,1fr)); } }
@media (min-width:1040px){ .grid{ grid-template-columns: repeat(3,minmax(0,1fr)); } }

.card{
  background:var(--card); border-radius: var(--radius); padding:16px; box-shadow: var(--shadow);
  border:1px solid rgba(255,255,255,.04);
  display:flex; flex-direction:column; gap:10px; min-height: 140px;
  transition: transform .15s ease;
}

/* カテゴリ別背景色 */
.card.blog{
  background:var(--card); /* ブログは既定の白背景 */
}
.card.youtube{
  background: linear-gradient(135deg, rgba(255, 182, 193, 0.08), rgba(255, 192, 203, 0.05));
}
.card.official{
  background: linear-gradient(135deg, rgba(173, 216, 230, 0.08), rgba(135, 206, 235, 0.05));
}

/* ライトモード用の背景色調整 */
@media (prefers-color-scheme: light) {
  .card.youtube{
    background: linear-gradient(135deg, rgba(255, 182, 193, 0.15), rgba(255, 192, 203, 0.08));
  }
  .card.official{
    background: linear-gradient(135deg, rgba(173, 216, 230, 0.15), rgba(135, 206, 235, 0.08));
  }
}
@media (prefers-color-scheme: light){ .card{ border-color: rgba(16,24,40,.06); } }
.card:hover{ transform: translateY(-2px) }
.badge{
  display:inline-flex; align-items:center; gap:8px; padding:6px 10px; border-radius: 999px; font-size:12px; width:max-content;
  background:var(--chip); border:1px solid transparent;
}
.badge.blog{ box-shadow: inset 0 0 0 1px rgba(46,204,113,.35) }
.badge.youtube{ box-shadow: inset 0 0 0 1px rgba(255,77,79,.35) }
.badge.official{ box-shadow: inset 0 0 0 1px rgba(42,100,255,.35) }

.entry-title{
  font-size: clamp(16px, 2vw, 18px); line-height:1.5; margin:0;
}
.entry-title a{ text-decoration: underline transparent; text-underline-offset: 3px }
.entry-title a:hover{ text-decoration-color: currentColor }

.meta{
  display:flex; flex-wrap:wrap; gap:10px; align-items:center; font-size: 13px; color:var(--muted)
}
.meta .dot{ width:4px; height:4px; background: currentColor; border-radius:50% }
.favicon{
  width:16px; height:16px; border-radius:3px; display:inline-block; vertical-align:middle; margin-right:4px;
}
.fallback-icon{
  display:inline-block; margin-right:4px;
}

.tags{ display:flex; flex-wrap:wrap; gap:8px; margin-top:2px }
.tag{
  font-size:12px; padding:6px 10px; border-radius:999px; background:var(--chip); cursor:pointer; border:1px solid transparent;
}
.tag:hover{ background:var(--chip-hover) }
.tag.active{ outline:2px solid var(--ring); background:var(--chip-active) }

/* エラー */
.error{
  background:rgba(255,77,79,.1); border:1px solid rgba(255,77,79,.3); border-radius:var(--radius);
  padding:16px; margin:16px 0; color:var(--danger);
}

/* ページネーション */
.pagination{
  display:flex; justify-content:center; align-items:center; gap:10px; margin:20px 0;
}
.page-btn{
  background:var(--chip); border:1px solid transparent; border-radius:8px; padding:8px 12px;
  cursor:pointer; color:var(--text); text-decoration:none;
}
.page-btn:hover{ background:var(--chip-hover) }
.page-btn.active{ background:var(--chip-active); outline:2px solid var(--ring) }
.page-btn:disabled, .page-btn.disabled{ opacity:0.5; cursor:not-allowed; pointer-events:none }

footer.site{ margin:40px 0 20px; color:var(--muted); font-size:13px; text-align:center }

/* フォーカス */
.tab:focus-visible, .btn:focus-visible, .clear:focus-visible, .tag:focus-visible, .select:focus-visible, .search input:focus-visible, .page-btn:focus-visible{
  outline: 2px solid var(--ring); outline-offset: 2px; border-radius: 10px;
}