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

:root {
  --bg-color: #fafafa;
  --panel-bg: #ffffff;
  --text-color: #171717;
  --text-muted: #737373;
  --border-color: #e5e5e5;
  --accent-color: #171717;
  --accent-hover: #404040;
  --radius: 2px;
  --sidebar-width: 300px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Fira Mono', monospace;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  line-height: 1.5;
}

/* Layout */
.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background: var(--panel-bg);
}

header h1 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: 0.25rem;
  letter-spacing: 0.02em;
}

/* Main content area */
.main-content {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Canvas viewport */
.viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--bg-color);
  min-width: 0; /* Prevent flex overflow */
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  max-width: min(70vh, 700px);
  aspect-ratio: 1;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
}

#canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--panel-bg);
  padding: 0.75rem 1.5rem;
  border: 1px solid var(--border-color);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.loading.active {
  opacity: 1;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--panel-bg);
  border-left: 1px solid var(--border-color);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.controls {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-group label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.input-row {
  display: flex;
  gap: 0.375rem;
}

input[type="number"],
select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--panel-bg);
  font-family: inherit;
  font-size: 0.8125rem;
  color: var(--text-color);
  transition: border-color 0.15s ease;
}

input[type="number"]:hover,
select:hover {
  border-color: var(--text-muted);
}

input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: var(--accent-color);
}

/* Remove number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}

/* Buttons */
button {
  padding: 0.625rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--panel-bg);
  font-family: inherit;
  font-size: 0.8125rem;
  color: var(--text-color);
  cursor: pointer;
  transition: all 0.15s ease;
}

button:hover {
  border-color: var(--text-muted);
  background: var(--bg-color);
}

button:active {
  transform: translateY(1px);
}

button.primary {
  width: 100%;
  background: var(--accent-color);
  color: white;
  border-color: var(--accent-color);
  font-weight: 500;
}

button.primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

#random-btn {
  padding: 0.625rem;
  flex-shrink: 0;
  width: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.button-stack {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.button-stack button {
  width: 100%;
}

/* Divider */
.divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.5rem 0;
}

/* Traits panel */
.traits-panel {
  flex: 1;
  padding: 1.25rem;
  border-top: 1px solid var(--border-color);
  overflow-y: auto;
}

.traits-panel h3 {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.traits-list {
  display: flex;
  flex-direction: column;
}

.trait-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  gap: 0.5rem;
}

.trait-item:last-child {
  border-bottom: none;
}

.trait-label {
  color: var(--text-muted);
  flex-shrink: 0;
}

.trait-value {
  font-weight: 500;
  text-align: right;
  word-break: break-word;
}

.trait-value.legendary {
  color: #7c3aed;
}

.trait-value.rare {
  color: #2563eb;
}

.trait-value.uncommon {
  color: #059669;
}

/* Rarity score display */
.rarity-score {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--bg-color);
  border-radius: var(--radius);
  text-align: center;
}

.rarity-score .score {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1;
}

.rarity-score .tier {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-top: 0.375rem;
}

/* Responsive */
@media (max-width: 768px) {
  .main-content {
    flex-direction: column;
  }

  .viewport {
    padding: 1rem;
    min-height: 50vh;
  }

  .canvas-wrapper {
    max-width: min(90vw, 500px);
  }

  .sidebar {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--border-color);
    max-height: 50vh;
  }
}

/* Scrollbar styling */
.sidebar::-webkit-scrollbar,
.traits-panel::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track,
.traits-panel::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb,
.traits-panel::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover,
.traits-panel::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Hidden utility */
[hidden] {
  display: none !important;
}