/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f5e6ca;
  --bg-dark: #e8d5b0;
  --text: #3a2e1f;
  --text-muted: #7a6b57;
  --accent: #a94fd9;
  --accent-light: #f4b4c4;
  --accent-dark: #631a8b;
  --tab-bg: #e0cfa8;
  --tab-active: #fdf3e0;
  --tab-border: #b8a080;
  --panel-bg: #fff8ee;
  --sidebar-bg: #fdf3e0;
  --grid-line: #ccc0a8;
  --shadow: rgba(58, 46, 31, 0.15);
}

body {
  font-family: "brush script mt", cursive;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === Header === */
.app-header {
  background: var(--accent);
  color: #fff;
  padding: 10px 24px;
  border-bottom: 3px solid var(--accent-dark);
}

.app-title {
  font-size: 1.4rem;
  font-weight: normal;
  letter-spacing: 0.5px;
  font-style: italic;
}

/* === Tab Bar (File Folder Style) === */
.tab-bar {
  display: flex;
  gap: 4px;
  padding: 0 16px;
  padding-top: 8px;
  padding-bottom: 8px;
  background: var(--bg-dark);
  border-bottom: 3px solid var(--tab-border);
  align-items: flex-end;
}

.tab-group {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  position: relative;
}

.tab-group-label {
  position: absolute;
  top: -2px;
  left: 8px;
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.tab {
  padding: 8px 20px;
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--tab-bg);
  border: 2px solid var(--tab-border);
  border-bottom: 3px solid var(--tab-border);
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  color: var(--text-muted);
  position: relative;
  top: 11px;
  transition: background 0.15s, color 0.15s;
}

.tab:hover {
  background: var(--bg);
  color: var(--text);
}

.tab.active {
  background: var(--tab-active);
  color: var(--text);
  border-color: var(--tab-border);
  font-weight: bold;
  border-bottom: none;
  z-index: 1;
}

/* === Tab Content === */
.tab-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.tab-panel {
  display: none;
  flex: 1;
  background: var(--panel-bg);
  min-height: 0;
}

.tab-panel.active {
  display: flex;
}

/* === Design Layout === */
.design-layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* === Palette Sidebar === */
.palette-sidebar {
  width: 180px;
  min-width: 180px;
  background: var(--sidebar-bg);
  border-right: 2px solid var(--tab-border);
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.palette-title {
  font-size: 1rem;
  font-weight: normal;
  font-style: italic;
  color: var(--text-muted);
  text-align: center;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.palette-swatch {
  aspect-ratio: 1;
  border: 2px solid var(--tab-border);
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.1s;
}

.palette-swatch:hover {
  transform: scale(1.1);
  border-color: var(--text);
}

.palette-swatch.selected {
  border-color: var(--text);
  border-width: 3px;
  box-shadow: 0 0 0 2px var(--accent);
}

.palette-info {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
  min-height: 2.5em;
}

/* === Canvas Container === */
.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: crosshair;
  background:
    repeating-conic-gradient(var(--bg-dark) 0% 25%, var(--panel-bg) 0% 50%)
    0 0 / 20px 20px;
}

.canvas-container.panning {
  cursor: grab;
}

.canvas-container.panning:active {
  cursor: grabbing;
}

#grid-canvas {
  position: absolute;
  top: 0;
  left: 0;
}

/* === Zoom Controls === */
.zoom-controls {
  position: absolute;
  bottom: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-bg);
  border: 2px solid var(--tab-border);
  border-radius: 6px;
  padding: 4px 8px;
  box-shadow: 0 2px 8px var(--shadow);
}

.zoom-controls button {
  width: 28px;
  height: 28px;
  border: 1px solid var(--tab-border);
  border-radius: 4px;
  background: var(--bg);
  cursor: pointer;
  font-size: 1rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
}

.zoom-controls button:hover {
  background: var(--tab-bg);
}

#zoom-level {
  font-size: 0.8rem;
  color: var(--text-muted);
  min-width: 40px;
  text-align: center;
}

/* === About Tab === */
.about-content {
  max-width: 600px;
  padding: 32px;
  line-height: 1.6;
  background: var(--tab-active);
}

.about-content h2 {
  margin-bottom: 16px;
  color: var(--accent);

}

.about-content h3 {
  margin-top: 20px;
  margin-bottom: 8px;
  font-style: italic;
}

.about-content ul {
  padding-left: 24px;
}

.about-content li {
  margin-bottom: 6px;
}

.about-content em {
  color: var(--text-muted);
}