:root {
  --bg: #bd95db;        /* lavender background */
  --accent: #ffde59;    /* banana yellow */
  --accent-dark: #6a3a97; /* deep purple */
  --text-light: #ffffff;
  --text-dark: #1a1a1a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-light);
  font-family: 'Inter', sans-serif;
  text-align: center;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* HEADER */
header {
  padding: 2rem 1rem 1rem;
}

.title {
  font-family: 'Bungee', Inter, sans-serif;
  font-size: 2.2rem;
  margin: 0;
  color: var(--text-light);
  text-shadow: 2px 2px 0 #00000025;
}

.subtitle {
  font-size: 1rem;
  opacity: 0.9;
  margin: 0.3rem 0 2rem;
}

/* LAYOUT */
.grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  padding: 0 1rem 2rem;
  flex-grow: 1;
}

/* PREVIEW */
.preview {
  flex: 1 1 360px;
  max-width: 420px;
  position: relative;
}

canvas {
  width: 100%;
  height: auto;
  background: #2a1e3a;
  border: 3px solid var(--accent);
  border-radius: 12px;
  box-shadow: 0 8px 0 #00000040;
  transition: all 0.3s ease;
}

canvas:hover {
  transform: scale(1.01);
}

/* BUTTONS */
.buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 1rem;
}

.btn {
  flex: 1;
  margin: 0 4px;
  padding: 10px 12px;
  font-family: 'Bungee', sans-serif;
  font-size: 0.9rem;
  background: var(--accent);
  color: var(--text-dark);
  border: 2px solid #000;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn.primary {
  background: var(--accent-dark);
  color: var(--text-light);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 0 #00000025;
}

/* CONTROLS */
.controls {
  flex: 1 1 480px;
  max-width: 540px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: stretch;
}

/* CATEGORY PANELS */
.layer-group {
  background: var(--accent-dark);
  color: var(--text-light);
  border: 3px solid var(--accent);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 6px 0 #00000030;
  transition: transform 0.2s ease;
}

.layer-group:hover {
  transform: translateY(-2px);
}

.layer-group h2 {
  font-family: 'Bungee', Inter, sans-serif;
  margin: 0 0 0.8rem;
  font-size: 1.2rem;
  text-transform: uppercase;
}

/* THUMBNAILS */
.thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 10px;
}

.thumbs img {
  width: 100%;
  border-radius: 8px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s ease;
  background: #ffffff10;
}

.thumbs img:hover,
.thumbs img.active {
  border-color: var(--accent);
  transform: scale(1.05);
  background: #ffffff20;
}

/* FOOTER */
footer {
  padding: 1rem;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* MOBILE */
@media (max-width: 600px) {
  .title {
    font-size: 1.6rem;
  }
  .layer-group h2 {
    font-size: 1rem;
  }
  .btn {
    font-size: 0.8rem;
    padding: 8px 10px;
  }
  canvas {
    border-width: 2px;
  }
}