:root {
  --bg: #2b1d0e; --card: #3d2a14; --accent: #ffc933;
  --accent-hover: #ffd966; --text: #fff3d1; --btn-text: #3a2600;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  transition: background 0.4s, color 0.4s;
}
header { text-align: center; padding: 24px 16px 8px; }
header h1 { margin: 0; font-size: 2.4rem; color: var(--accent); }
header p { margin: 6px 0 0; opacity: 0.85; }
.row {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  width: min(900px, 94vw);
  margin: 12px auto;
}
#viewer {
  width: min(900px, 94vw);
  height: 55vh;
  margin: 16px auto;
  border-radius: 16px;
  overflow: hidden;
  border: 3px solid var(--accent);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}
#viewer canvas { display: block; cursor: grab; }
#viewer canvas:active { cursor: grabbing; }
.controls { display: flex; justify-content: center; }
button {
  background: var(--accent);
  color: var(--btn-text);
  border: 3px solid transparent;
  padding: 10px 20px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
}
button:hover { background: var(--accent-hover); }
.cat-btn { font-size: 1.1rem; padding: 12px 28px; opacity: 0.65; }
.cat-btn.active { opacity: 1; border-color: var(--text); }
.item-btn {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  padding: 8px 18px;
  font-size: 0.95rem;
}
.item-btn:hover { background: var(--accent-hover); color: var(--btn-text); }
.item-btn.active { background: var(--accent); color: var(--btn-text); }
main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  width: min(900px, 94vw);
  margin: 24px auto 48px;
}
section {
  background: var(--card);
  padding: 16px 20px;
  border-radius: 12px;
  border-left: 5px solid var(--accent);
}
section h2 { margin-top: 0; color: var(--accent); }