/* ─── Palette sidebar — standalone card next to canvas-wrapper ─────────────── */
.palette-sidebar {
  background: var(--card);
  border-radius: var(--radius);
  border: 2px solid var(--border);
  box-shadow: var(--sh-md);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 12px 10px;
  overflow-y: auto;
  overflow-x: visible; /* allow active swatch ring to show without clipping */
  /* Stick to top of viewport when scrolling */
  position: sticky;
  top: 16px;
  max-height: 90vh;
}

.palette-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  list-style: none;
  padding: 2px 4px; /* inner breathing room so active ring never clips card edge */
}

.color-swatch {
  aspect-ratio: 1;
  width: 100%;
  border-radius: 7px;
  background: var(--c, #ccc);
  border: 2.5px solid rgba(255,255,255,.9);
  box-shadow: 0 2px 6px rgba(0,0,0,.18), inset 0 -2px 0 rgba(0,0,0,.1);
  cursor: pointer;
  padding: 0;
  transition: transform .15s cubic-bezier(.34,1.56,.64,1), box-shadow .15s;
  display: block;
}
.color-swatch:hover {
  transform: scale(1.18) translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.22), inset 0 -2px 0 rgba(0,0,0,.1);
  z-index: 2;
}
.color-swatch.active {
  transform: scale(1.3);
  box-shadow: 0 0 0 3px #fff, 0 0 0 6px var(--c, #aaa), 0 0 0 9px rgba(0,0,0,.18), 0 8px 20px rgba(0,0,0,.28);
  z-index: 3;
  outline: none;
}

@keyframes swatchFlash {
  0%   { transform: scale(1); }
  20%  { transform: scale(1.6) translateY(-7px); }
  50%  { transform: scale(1.45) translateY(-4px); }
  75%  { transform: scale(1.55) translateY(-6px); }
  100% { transform: scale(1); }
}
.color-swatch.flash {
  animation: swatchFlash 0.65s cubic-bezier(.34,1.56,.64,1);
  z-index: 10;
  position: relative;
}

/* Tool items (erase, picker) span full width */
.legend-tool-item {
  grid-column: 1 / -1;
  list-style: none;
}

.tool-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 9px;
  border-radius: 9px;
  border: 2px solid transparent;
  cursor: pointer;
  font-family: var(--ff-brand);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .05em;
  text-transform: uppercase;
  transition: transform .12s ease, box-shadow .12s ease, border-color .15s, background .15s;
}
.tool-btn:hover { transform: translateY(-2px); box-shadow: 0 5px 14px rgba(0,0,0,.16); }
.tool-btn svg { flex-shrink: 0; pointer-events: none; }

.erase-btn { background: #f5f5f5; color: #c62828; border-color: #e5e5e5; }
.erase-btn:hover { background: #fff0ee; border-color: #ffb3a0; }
.erase-btn.active { background: #fde8e4; border-color: #e57373; box-shadow: 0 0 0 3px rgba(229,115,115,.18); transform: none; }

.picker-btn {
  background: linear-gradient(120deg, color-mix(in srgb, var(--c, #e91e63) 18%, #fff) 0%, color-mix(in srgb, var(--c, #e91e63) 8%, #fff) 100%);
  color: rgba(0,0,0,.7);
  border-color: color-mix(in srgb, var(--c, #e91e63) 30%, transparent);
  overflow: hidden;
  position: relative;
}
.picker-btn:hover { border-color: color-mix(in srgb, var(--c, #e91e63) 55%, transparent); }
.picker-btn.active { border-color: var(--c, #e91e63); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c, #e91e63) 22%, transparent); transform: none; }
.picker-label { flex: 1; text-align: left; pointer-events: none; }
.picker-dot { width: 13px; height: 13px; border-radius: 50%; border: 2px solid rgba(255,255,255,.85); box-shadow: 0 1px 4px rgba(0,0,0,.22); flex-shrink: 0; pointer-events: none; }
.color-input-hidden { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; border: none; padding: 0; z-index: 2; }

.legend-sep {
  grid-column: 1 / -1;
  height: 1px;
  margin: 4px 2px;
  background: linear-gradient(to right, transparent, rgba(0,0,0,.13), transparent);
  list-style: none;
  pointer-events: none;
}

/* Mobile: full-width horizontal strip below canvas */
@media (max-width: 640px) {
  .palette-sidebar {
    position: static; /* no sticky on mobile */
    flex-direction: row;
    overflow-x: auto;
    overflow-y: visible;
    padding: 10px 12px;
    max-height: none;
    align-items: center;
    gap: 0;
    border-radius: var(--radius);
  }
  .palette-strip {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 6px;
    padding: 4px 2px;
    flex-wrap: nowrap;
  }
  .color-swatch { width: 40px; height: 40px; flex-shrink: 0; }
  .legend-tool-item { grid-column: auto; flex-shrink: 0; }
  .tool-btn { padding: 6px 10px; gap: 5px; font-size: .68rem; border-radius: 8px; white-space: nowrap; }
  .picker-dot { width: 11px; height: 11px; }
  .legend-sep {
    width: 1px; height: 32px; flex-shrink: 0;
    margin: 0 4px;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,.13), transparent);
  }
}

/* ─── Max colour-picker modal (16 × 16 grid) ─────────────────────────────── */
.max-picker-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.42);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1200;
  opacity: 0;
  transition: opacity 0.18s ease;
  padding: 16px;
  backdrop-filter: blur(3px);
}
.max-picker-backdrop.open { opacity: 1; }

.max-picker-panel {
  background: #fff;
  border-radius: 22px;
  box-shadow: 0 16px 56px rgba(0, 0, 0, 0.3), 0 3px 10px rgba(0, 0, 0, 0.12);
  overflow: hidden;
  max-width: 440px;
  width: 100%;
  transform: scale(0.88) translateY(20px);
  transition: transform 0.26s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.max-picker-backdrop.open .max-picker-panel { transform: scale(1) translateY(0); }

.max-picker-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px 12px;
  background: linear-gradient(120deg, #ff9a9e 0%, #fecfef 35%, #a1c4fd 68%, #c2e9fb 100%);
}
.max-picker-title {
  font-family: var(--ff-brand);
  font-size: 1.05rem;
  font-weight: 800;
  color: #333;
  letter-spacing: 0.02em;
}
.max-picker-hint {
  font-size: 0.7rem;
  color: #555;
  margin-top: 2px;
}
.max-picker-close {
  width: 30px; height: 30px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.14);
  color: #444;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.14s, transform 0.12s;
}
.max-picker-close:hover { background: rgba(0, 0, 0, 0.26); transform: scale(1.12); }

.max-picker-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 3px;
  padding: 14px;
  background: #f7f8fc;
}
.max-cell {
  aspect-ratio: 1;
  width: 100%;
  border-radius: 5px;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-color 0.1s;
  position: relative;
}
.max-cell:hover {
  transform: scale(1.35);
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.38);
  border-color: rgba(255, 255, 255, 0.85);
}
.max-cell.selected {
  border-color: #fff;
  box-shadow: 0 0 0 2px #fff, 0 0 0 4.5px rgba(0, 0, 0, 0.7), 0 5px 14px rgba(0, 0, 0, 0.36);
  transform: scale(1.28);
  z-index: 3;
}

@media (max-width: 480px) {
  .max-picker-grid { gap: 2px; padding: 10px; }
  .max-picker-panel { border-radius: 16px; }
  .max-picker-title { font-size: 0.95rem; }
}