@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Noto+Sans+JP:wght@300;400;500&family=Share+Tech+Mono&display=swap');

:root {
  --bg-deep: #020b18;
  --blue-primary: #1a6fff;
  --blue-light: #4d9fff;
  --blue-glow: #00aaff;
  --white: #f0f8ff;
  --white-dim: #a8c8e8;
  --accent: #00e5ff;
  --grid-line: rgba(26,111,255,0.12);
  --glass: rgba(7,30,56,0.7);
}

* { margin:0; padding:0; box-sizing:border-box; }

body {
  background: var(--bg-deep);
  color: var(--white);
  font-family: 'Noto Sans JP', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content:'';
  position: fixed; inset:0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index:0; pointer-events:none;
}

/* ── ナビ ── */
nav {
  position: fixed; top:0; left:0; right:0; z-index:100;
  display: flex; align-items:center; justify-content:space-between;
  padding: 0 40px; height:64px;
  background: rgba(2,11,24,0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,229,255,0.2);
}
.nav-logo {
  font-family:'Orbitron',monospace; font-size:0.95rem; font-weight:900;
  letter-spacing:0.2em; color:var(--accent);
  text-shadow:0 0 20px rgba(0,229,255,0.5);
  text-decoration:none;
}
.nav-logo span { color:var(--white-dim); font-weight:400; }
.nav-links { display:flex; gap:24px; list-style:none; }
.nav-links a {
  font-family:'Share Tech Mono',monospace; font-size:0.7rem;
  letter-spacing:0.1em; color:var(--white-dim); text-decoration:none;
  text-transform:uppercase; transition:color 0.2s;
}
.nav-links a:hover { color:var(--accent); }
.nav-back {
  font-family:'Share Tech Mono',monospace; font-size:0.7rem;
  letter-spacing:0.1em; color:var(--white-dim); text-decoration:none;
  display:flex; align-items:center; gap:6px; transition:color 0.2s;
}
.nav-back:hover { color:var(--accent); }

/* ── パンくず ── */
.breadcrumb {
  position:relative; z-index:10;
  padding: 90px 40px 0;
  max-width:1100px; margin:0 auto;
  display:flex; align-items:center; gap:8px;
  font-family:'Share Tech Mono',monospace; font-size:0.68rem;
  letter-spacing:0.08em; color:var(--white-dim);
}
.breadcrumb a { color:var(--accent); text-decoration:none; }
.breadcrumb a:hover { text-decoration:underline; }
.breadcrumb span { opacity:0.5; }

/* ── ページヘッダー ── */
.page-header {
  position:relative; z-index:10;
  max-width:1100px; margin:0 auto;
  padding: 32px 40px 48px;
}
.page-header-label {
  font-family:'Share Tech Mono',monospace; font-size:0.65rem;
  letter-spacing:0.25em; color:var(--accent); margin-bottom:10px;
}
.page-header-title {
  font-family:'Orbitron',monospace;
  font-size: clamp(1.6rem,4vw,3rem); font-weight:900;
  letter-spacing:0.06em; color:var(--white);
  line-height:1.1; margin-bottom:14px;
}
.page-header-title .sub {
  display:block; font-size:0.45em; font-weight:400;
  color:var(--white-dim); letter-spacing:0.15em; margin-top:6px;
}
.page-header-desc {
  font-size:0.9rem; line-height:1.8; color:var(--white-dim);
  max-width:700px;
}
.page-header-line {
  height:1px; margin-top:28px;
  background:linear-gradient(to right, rgba(0,229,255,0.5), transparent);
}

/* ── メインコンテンツ ── */
.page-content {
  position:relative; z-index:10;
  max-width:1100px; margin:0 auto;
  padding: 0 40px 120px;
}

/* ── 記事カード ── */
.article-grid {
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(320px,1fr));
  gap:20px; margin-bottom:48px;
}
.article-card {
  background:var(--glass);
  border:1px solid rgba(26,111,255,0.2);
  backdrop-filter:blur(8px);
  overflow:hidden; transition:all 0.3s;
  clip-path:polygon(0 0,calc(100% - 14px) 0,100% 14px,100% 100%,0 100%);
}
.article-card:hover {
  border-color:rgba(0,229,255,0.5);
  transform:translateY(-3px);
  box-shadow:0 12px 32px rgba(0,0,0,0.4);
}
.article-card-img {
  width:100%; height:180px; object-fit:cover;
  border-bottom:1px solid rgba(26,111,255,0.2);
  background:linear-gradient(135deg,rgba(26,111,255,0.1),rgba(0,229,255,0.05));
  display:flex; align-items:center; justify-content:center;
  font-size:3rem; color:rgba(0,229,255,0.3);
}
.article-card-body { padding:20px; }
.article-card-tag {
  font-family:'Share Tech Mono',monospace; font-size:0.6rem;
  letter-spacing:0.1em; color:var(--accent);
  background:rgba(0,229,255,0.08); border:1px solid rgba(0,229,255,0.2);
  padding:2px 8px; border-radius:2px; display:inline-block; margin-bottom:10px;
}
.article-card-title {
  font-size:1rem; font-weight:500; color:var(--white);
  margin-bottom:8px; line-height:1.4;
}
.article-card-desc {
  font-size:0.8rem; line-height:1.65; color:var(--white-dim);
}

/* ── 空状態 ── */
.empty-state {
  text-align:center; padding:80px 40px;
  border:1px dashed rgba(26,111,255,0.25);
  background:rgba(7,30,56,0.3);
}
.empty-icon { font-size:3rem; margin-bottom:16px; opacity:0.4; }
.empty-title {
  font-family:'Orbitron',monospace; font-size:0.85rem;
  letter-spacing:0.15em; color:var(--white-dim); margin-bottom:8px;
}
.empty-desc { font-size:0.8rem; color:rgba(168,200,232,0.5); line-height:1.7; }

/* ── セクション見出し ── */
.content-section { margin-bottom:48px; }
.content-section-title {
  font-family:'Orbitron',monospace; font-size:0.8rem; font-weight:700;
  letter-spacing:0.15em; color:var(--accent); margin-bottom:20px;
  display:flex; align-items:center; gap:12px; text-transform:uppercase;
}
.content-section-title::after {
  content:''; flex:1; height:1px;
  background:linear-gradient(to right,rgba(0,229,255,0.3),transparent);
}

/* ── テキストブロック ── */
.text-block {
  background:var(--glass); border:1px solid rgba(26,111,255,0.18);
  backdrop-filter:blur(8px); padding:28px 32px;
  font-size:0.88rem; line-height:1.9; color:var(--white-dim);
  margin-bottom:16px;
}
.text-block h3 {
  font-family:'Orbitron',monospace; font-size:0.8rem; font-weight:700;
  color:var(--white); margin-bottom:12px; letter-spacing:0.1em;
}
.text-block p { margin-bottom:12px; }
.text-block p:last-child { margin-bottom:0; }

/* ── フッター ── */
footer {
  position:relative; z-index:10;
  border-top:1px solid rgba(26,111,255,0.15); padding:32px 40px;
  text-align:center;
  font-family:'Share Tech Mono',monospace; font-size:0.65rem;
  letter-spacing:0.1em; color:rgba(168,200,232,0.35);
}
footer a { color:var(--accent); text-decoration:none; opacity:0.6; }
footer a:hover { opacity:1; }

/* ── レスポンシブ ── */
@media(max-width:768px){
  nav { padding:0 20px; }
  .nav-links { display:none; }
  .breadcrumb, .page-header, .page-content { padding-left:20px; padding-right:20px; }
  footer { padding:24px 20px; }
}