@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Outfit:wght@300;400;500;600&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #fafafa;
  --canvas-bg: #ffffff;
  --text: #1a1a1a;
  --text-muted: #999;
  --accent: #1a1a1a;
  --border: #e8e8e8;
  --control-bg: rgba(255, 255, 255, 0.92);
  --control-hover: rgba(0, 0, 0, 0.04);
  --control-active: rgba(0, 0, 0, 0.08);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 4px rgba(0, 0, 0, 0.03);
  --radius: 10px;
  --transition: 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Phi Spacing System (Base: 10px * 1.618^n) */
  --space-1: 10px;
  --space-2: 16px;
  --space-3: 26px;
  --space-4: 42px;
  --space-5: 68px;

  /* Phi Typography System (Base: 11px * ~1.272^n) */
  --font-3xs: 9px;
  --font-2xs: 11px;
  --font-xs: 13px;
  --font-sm: 15px;
  --font-md: 18px;
  --font-lg: 24px;
}

body {
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  user-select: none;
  -webkit-user-select: none;
  animation: fade-in 600ms ease;
}

/* ─── Canvas ─── */

#canvas-container {
  position: absolute;
  inset: 0;
  background: var(--canvas-bg);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

canvas:active {
  cursor: grabbing;
}

/* ─── Top Bar ─── */

.top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 10;
}

.title {
  font-size: var(--font-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  opacity: 0.6;
  transition: opacity var(--transition);
}

.top-bar:hover .title {
  opacity: 1;
}

/* ─── Controls ─── */

.bottom-tools {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 16px;
  /* Gap between pill panels */
  z-index: 10;
}

.panel {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  background: var(--control-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  transition: opacity var(--transition);
  position: relative;
}

.panel:hover {
  opacity: 1;
}

.ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: 7px;
  cursor: pointer;
  transition: background var(--transition), transform 120ms ease;
  position: relative;
}

.ctrl-btn:hover {
  background: var(--control-hover);
}

.ctrl-btn:active {
  background: var(--control-active);
  transform: scale(0.94);
}

.ctrl-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ctrl-btn:disabled {
  opacity: 0.3;
  cursor: default;
  transform: none;
  background: transparent;
}

.ctrl-divider {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
}

.zoom-label {
  font-size: var(--font-2xs);
  font-weight: 500;
  color: var(--text-muted);
  min-width: 42px;
  text-align: center;
  letter-spacing: 0.03em;
  padding: 0 4px;
}

/* ─── Tooltips ─── */

.ctrl-btn[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  background: var(--text);
  color: var(--canvas-bg);
  font-size: var(--font-2xs);
  font-weight: 400;
  border-radius: 5px;
  white-space: nowrap;
  pointer-events: none;
  animation: tooltip-in 150ms ease;
}

/* ─── Keyframes ─── */

@keyframes tooltip-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(3px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* ─── Dropdown Menu ─── */

.dropdown {
  display: inline-block;
}

.dropdown-content {
  position: absolute;
  bottom: calc(100% + 8px);
  left: -1px;
  background: var(--control-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 6px;
  min-width: 160px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: all var(--transition);
  z-index: 50;
}

.dropdown-content.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 5px;
  font-size: var(--font-2xs);
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
}

.dropdown-item:hover {
  background: var(--control-hover);
}

.dropdown-item input[type="checkbox"] {
  margin: 0;
  accent-color: var(--text);
  cursor: pointer;
}

.dropdown-divider {
  width: auto;
  height: 1px;
  background: var(--border);
  margin: 4px -6px;
}

.color-swatch {
  width: 13px;
  height: 13px;
  padding: 0;
  border: 1.4px solid var(--text);
  border-radius: 2px;
  background: none;
  cursor: pointer;
}

.color-swatch::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-swatch::-webkit-color-swatch {
  border: none;
}

/* ─── Debug Panel ─── */

.debug-panel {
  position: fixed;
  top: 16px;
  right: 16px;
  background: rgba(26, 26, 26, 0.85);
  /* Dark zen */
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  padding: 12px 16px;
  border-radius: var(--radius);
  font-family: monospace;
  font-size: var(--font-2xs);
  line-height: 1.6;
  pointer-events: none;
  z-index: 20;
  min-width: 200px;
  box-shadow: var(--shadow-md);
  transition: opacity var(--transition);
}

.debug-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.debug-label {
  color: rgba(255, 255, 255, 0.5);
}