:root {
  --bg: #0f1020;
  --fg: #e6e6f0;
  --muted: #b3b3c8;
  --accent: #8e66ff;
  --accent2: #ff5c8a;
  --card: #1a1b34;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
               "Hiragino Kaku Gothic ProN", "Yu Gothic UI", Meiryo, sans-serif;
  line-height: 1.6;
}

header {
  padding: 16px 24px;
  background: linear-gradient(90deg, #1a1b34 0%, #2a1f4a 100%);
  border-bottom: 1px solid #2a2a44;
}

header h1 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

header p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

main {
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

canvas { border-radius: 6px; box-shadow: 0 4px 20px rgba(0,0,0,0.5); }

/* landing page */
.intro {
  max-width: 900px;
  margin: 24px auto;
  padding: 0 24px;
}

.intro h2 {
  color: var(--accent);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 6px;
  margin-top: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  max-width: 1200px;
  margin: 16px auto;
  padding: 0 24px 32px;
}

.card {
  background: var(--card);
  border: 1px solid #2a2a44;
  border-radius: 10px;
  padding: 16px 18px;
  transition: transform 0.15s, border-color 0.15s;
}

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

.card a {
  color: var(--fg);
  font-weight: 600;
  font-size: 15px;
}

.card .num {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  background: var(--accent);
  color: white;
  border-radius: 999px;
  margin-right: 8px;
}

.card .desc {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  padding: 2px 6px;
  background: #333;
  color: var(--muted);
  border-radius: 4px;
  margin-right: 4px;
  margin-top: 8px;
}
.tag.cam   { background: #3d2a4a; color: #f0c0ff; }
.tag.mic   { background: #2a3d4a; color: #c0e0ff; }
.tag.image { background: #4a3d2a; color: #f0e0c0; }
.tag.train { background: #2a4a3d; color: #c0f0d0; }