:root {
  --bg: #0f1116;
  --card: #1a1d27;
  --text: #e7e9ee;
  --muted: #9aa0ad;
  --accent: #5b8cff;
  --border: #2a2f3d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", Meiryo, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a { color: var(--accent); }

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 3.5rem 1.25rem 2rem;
}

.site-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.site-header h1 {
  font-size: 2.4rem;
  margin: 0 0 0.5rem;
}

.lead {
  color: var(--muted);
  margin: 0;
}

.back-link { text-decoration: none; }
.back-link:hover { text-decoration: underline; }

/* ---- カード一覧 ---- */
.app-list {
  display: grid;
  gap: 1.5rem;
}

.app-card {
  display: flex;
  gap: 1.25rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  transition: transform .15s ease, border-color .15s ease;
}

.app-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.app-thumb {
  flex: 0 0 150px;
  display: block;
  border-radius: 10px;
  overflow: hidden;
  background: #0b0d12;
  align-self: flex-start;
}

.app-thumb img {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.app-body { flex: 1; min-width: 0; }

.app-name {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
}
.app-name a { color: var(--text); text-decoration: none; }
.app-name a:hover { color: var(--accent); }

.app-platform {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.05rem 0.6rem;
  margin-bottom: 0.5rem;
}

.app-tagline {
  margin: 0.4rem 0 0.5rem;
  color: var(--text);
}

.app-note {
  margin: 0.5rem 0 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.app-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1rem;
}

.btn {
  display: inline-block;
  padding: 0.45rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background .15s ease, border-color .15s ease;
}

.btn:hover { border-color: var(--accent); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.btn-primary:hover { background: #3f73f0; }

/* ---- 詳細ページ ---- */
.detail-header { margin-bottom: 1.25rem; }
.detail-header h1 { font-size: 2rem; margin: 0 0 0.4rem; }

.detail-shot {
  margin: 0 0 1.5rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  background: #0b0d12;
}
.detail-shot img { display: block; width: 100%; height: auto; }

.detail-section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.4rem;
  margin-bottom: 1rem;
}
.detail-section h2 {
  font-size: 1.15rem;
  margin: 0.3rem 0 0.6rem;
  color: var(--accent);
}
.detail-section ul { margin: 0; padding-left: 1.2rem; }
.detail-section li { margin: 0.25rem 0; }

.detail-links { margin-top: 1.5rem; }

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 2rem 1rem 3rem;
}

/* ---- スマホ ---- */
@media (max-width: 560px) {
  .app-card { flex-direction: column; }
  .app-thumb { flex-basis: auto; width: 100%; }
  .app-thumb img { height: 180px; }
}