:root {
  --bg: #f8fafc;
  --panel: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #cbd5e1;
  --blue: #2563eb;
  --green: #16a34a;
  --red: #dc2626;
  --orange: #ea580c;
  --purple: #7c3aed;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px;
}

.header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 12px;
}

h1 {
  margin: 0;
  font-size: 2rem;
}

.header p {
  margin: 4px 0 0;
  color: var(--muted);
}

.mode-box {
  display: flex;
  gap: 8px;
}

button {
  border: 1px solid var(--border);
  background: white;
  color: var(--text);
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #eff6ff;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 10px;
}

.hud div {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px 12px;
}

.hud span {
  display: block;
  font-size: .8rem;
  color: var(--muted);
}

.hud strong {
  font-size: 1.15rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: white;
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, .06);
}

.message {
  margin: 12px 0;
  padding: 12px 14px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: 14px;
  line-height: 1.6;
}

.cards {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}

.card {
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  cursor: pointer;
  min-height: 126px;
  transition: transform .08s, border-color .08s;
}

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

.card .key {
  font-size: .8rem;
  color: var(--muted);
}

.card h3 {
  margin: 4px 0 4px;
  font-size: 1rem;
}

.card .cat {
  color: var(--blue);
  font-weight: 700;
  font-size: .85rem;
}

.card .effect {
  margin-top: 8px;
  font-weight: 800;
}

.rise .effect { color: var(--red); }
.fall .effect { color: var(--blue); }

.card .meta {
  color: var(--muted);
  font-size: .82rem;
  margin-top: 5px;
}

.notes {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  line-height: 1.8;
}

.notes h2 {
  margin-top: 0;
}

@media (max-width: 800px) {
  .header { flex-direction: column; align-items: flex-start; }
  .hud { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
}