/* LLM Data Hub — 共通スタイル
   軽量・モバイルファースト・外部フレームワーク不使用
   ========================================================= */

/* ---------- リセット & ベース ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-bg:        #0f1117;
  --c-surface:   #1a1d27;
  --c-surface2:  #22263a;
  --c-border:    #2e3250;
  --c-text:      #e2e4f0;
  --c-muted:     #8891b5;
  --c-accent:    #6c8eff;
  --c-accent2:   #a78bfa;
  --c-green:     #34d399;
  --c-yellow:    #fbbf24;
  --c-red:       #f87171;
  --c-openai:    #10a37f;
  --c-anthropic: #c96442;
  --c-google:    #4285f4;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --shadow: 0 2px 12px rgba(0,0,0,.4);
  --font-mono: 'Menlo','Monaco','Consolas',monospace;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system,BlinkMacSystemFont,'Segoe UI','Hiragino Sans',
               'Noto Sans JP',sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  min-height: 100vh;
}

a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; }

/* ---------- ヘッダー ---------- */
.site-header {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky; top: 0; z-index: 100;
  padding: 0 1rem;
}
.header-inner {
  max-width: 1080px; margin: 0 auto;
  display: flex; align-items: center;
  gap: 1.5rem; height: 56px;
}
.site-logo {
  font-size: 1.05rem; font-weight: 700;
  color: var(--c-text); white-space: nowrap;
  display: flex; align-items: center; gap: .4rem;
}
.site-logo .logo-icon { font-size: 1.3rem; }
.site-logo:hover { text-decoration: none; }

nav { display: flex; gap: 0; flex: 1; }
.nav-link {
  padding: .35rem .75rem;
  color: var(--c-muted);
  font-size: .9rem; font-weight: 500;
  border-radius: var(--r-sm);
  transition: color .15s, background .15s;
  white-space: nowrap;
}
.nav-link:hover { color: var(--c-text); text-decoration: none; background: var(--c-surface2); }
.nav-link.active { color: var(--c-accent); }

/* ---------- メインレイアウト ---------- */
.container { max-width: 1080px; margin: 0 auto; padding: 0 1rem; }

/* ---------- ヒーロー ---------- */
.hero {
  background: linear-gradient(135deg, #12162a 0%, #1a1d35 50%, #0f1117 100%);
  border-bottom: 1px solid var(--c-border);
  padding: 4rem 1rem 3.5rem;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  background: rgba(108,142,255,.15);
  border: 1px solid rgba(108,142,255,.3);
  color: var(--c-accent);
  font-size: .78rem; font-weight: 600;
  padding: .25rem .75rem;
  border-radius: 100px;
  margin-bottom: 1.25rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(1.75rem, 5vw, 3rem);
  font-weight: 800; line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #e2e4f0, #a0a8d0);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: clamp(.95rem, 2.5vw, 1.15rem);
  color: var(--c-muted); max-width: 600px;
  margin: 0 auto 2rem;
}
.hero-cta {
  display: inline-flex; align-items: center; gap: .5rem;
  background: var(--c-accent);
  color: #fff; font-weight: 600;
  padding: .65rem 1.5rem;
  border-radius: var(--r-md);
  transition: opacity .15s;
}
.hero-cta:hover { opacity: .85; text-decoration: none; }

/* ---------- セクション ---------- */
.section { padding: 3rem 0; }
.section-title {
  font-size: 1.4rem; font-weight: 700;
  margin-bottom: .4rem;
}
.section-sub { color: var(--c-muted); font-size: .9rem; margin-bottom: 1.75rem; }

/* ---------- カードグリッド ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  transition: border-color .2s, transform .2s;
  display: flex; flex-direction: column; gap: .75rem;
}
.card:hover { border-color: var(--c-accent); transform: translateY(-2px); }
.card-icon { font-size: 2rem; }
.card-title { font-size: 1.05rem; font-weight: 700; }
.card-desc { color: var(--c-muted); font-size: .9rem; flex: 1; }
.card-link {
  display: inline-flex; align-items: center; gap: .35rem;
  color: var(--c-accent); font-size: .88rem; font-weight: 600;
  margin-top: .25rem;
}
.card-link:hover { text-decoration: underline; }

/* ---------- 更新日バナー ---------- */
.updated-bar {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: .6rem 1rem;
  font-size: .85rem; color: var(--c-muted);
  display: flex; align-items: center; gap: .5rem;
  margin-bottom: 2rem;
}
.updated-bar .dot { color: var(--c-green); }

/* ---------- 料金テーブル ---------- */
.table-wrap { overflow-x: auto; margin-bottom: 1rem; border-radius: var(--r-md); }
table {
  width: 100%; border-collapse: collapse;
  font-size: .88rem;
  background: var(--c-surface);
}
thead tr { background: var(--c-surface2); }
th {
  padding: .65rem .9rem;
  text-align: left; font-weight: 600;
  color: var(--c-muted);
  border-bottom: 2px solid var(--c-border);
  white-space: nowrap;
}
td {
  padding: .6rem .9rem;
  border-bottom: 1px solid var(--c-border);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

.model-name { font-weight: 600; }
.price { font-family: var(--font-mono); font-size: .85rem; }
.badge {
  display: inline-block; padding: .15rem .5rem;
  border-radius: 100px; font-size: .73rem; font-weight: 600;
}
.badge-new { background: rgba(52,211,153,.15); color: var(--c-green); border: 1px solid rgba(52,211,153,.3); }
.badge-preview { background: rgba(251,191,36,.12); color: var(--c-yellow); border: 1px solid rgba(251,191,36,.3); }
.badge-intro { background: rgba(108,142,255,.12); color: var(--c-accent); border: 1px solid rgba(108,142,255,.3); }

/* プロバイダー見出し行 */
.provider-row td {
  background: var(--c-surface2);
  font-size: .78rem; font-weight: 700;
  color: var(--c-muted); text-transform: uppercase;
  letter-spacing: .06em;
  padding: .4rem .9rem;
}
.provider-openai td { border-left: 3px solid var(--c-openai); }
.provider-anthropic td { border-left: 3px solid var(--c-anthropic); }
.provider-google td { border-left: 3px solid var(--c-google); }

/* ---------- 出典 ---------- */
.source-note {
  font-size: .78rem; color: var(--c-muted);
  margin-top: .5rem; margin-bottom: 1.5rem;
}
.source-note a { color: var(--c-muted); text-decoration: underline; }
.source-note a:hover { color: var(--c-text); }

/* ---------- ティップ/補足ブロック ---------- */
.tip-box {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.tip-box h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; }
.tip-box ul { padding-left: 1.2em; color: var(--c-muted); font-size: .9rem; }
.tip-box ul li { margin-bottom: .3rem; }

/* ---------- トピックスカード ---------- */
.topics-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-yellow);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.topics-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; color: var(--c-yellow); }
.topics-card p { font-size: .88rem; color: var(--c-muted); }
.topics-card a { color: var(--c-yellow); }

/* ---------- フッター ---------- */
.site-footer {
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  padding: 2rem 1rem;
  margin-top: 4rem;
}
.footer-inner {
  max-width: 1080px; margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 1rem;
  justify-content: space-between; align-items: flex-start;
}
.footer-brand { font-size: .9rem; }
.footer-brand strong { display: block; margin-bottom: .25rem; }
.footer-brand p { color: var(--c-muted); font-size: .8rem; }
.footer-disclaimer {
  max-width: 560px; font-size: .78rem; color: var(--c-muted);
  line-height: 1.6;
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 640px) {
  .hero { padding: 2.5rem 1rem 2rem; }
  .section { padding: 2rem 0; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; }
}