/* css variables, primarily purple and dark theme */
:root {
  --bg-primary: #0f0f14;
  --bg-secondary: #16161d;
  --bg-tertiary: #1c1c26;
  --bg-input: #22222e;
  --accent: #8b5cf6;
  --accent-hover: #a78bfa;
  --accent-glow: rgba(139, 92, 246, 0.25);
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border: #27272f;
  --border-hover: #3f3f4a;
  --success: #22c55e;
  --radius: 10px;
  --radius-sm: 6px;
}

/* global styles set here */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.5;
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}
header {
  text-align: center;
  margin-bottom: 2.5rem;
}
header a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}
.subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.layout {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 1.5rem;
  align-items: start;
}
.controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.controls-grid .panel.full-width {
  grid-column: 1 / -1;
}

@media (max-width: 1024px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .output-panel {
    position: static !important;
  }
}
@media (max-width: 640px) {
  .app {
    padding: 1rem;
  }
  h1 {
    font-size: 1.5rem;
  }
  .controls-grid {
    grid-template-columns: 1fr !important; 
    /* remain important to override full-width panels */
  }
}

.panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.panel-header {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.section {
  margin-bottom: 1.25rem;
}
.section:last-child {
  margin-bottom: 0;
}
.section-label,
.inline-group label,
.inline-group .unit,
.color-field label,
.slider-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.section-label {
  margin-bottom: 0.5rem;
  display: block;
}

.text-input,
.hex-input,
.number-input {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
}
.text-input:focus,
.hex-input:focus,
.number-input:focus {
  outline: none;
  border-color: var(--accent);
}
.text-input {
  width: 100%;
  padding: 0.875rem;
  font-size: 0.875rem;
  resize: vertical;
  min-height: 70px;
  transition: border-color 0.2s;
}
.text-input::placeholder {
  color: var(--text-muted);
}
.hex-input {
  width: 72px;
  padding: 0.5rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.75rem;
}
.number-input {
  width: 65px;
  padding: 0.5rem;
  font-size: 0.8rem;
  text-align: center;
}

select.number-input {
  cursor: pointer;
  text-align: left;
  width: 90px;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2371717a'%3E%3Cpath d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 24px;
}
select.number-input option {
  background: var(--bg-input);
  color: var(--text-primary);
}

.toggle-group {
  display: flex;
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 3px;
}
.toggle-btn {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
.toggle-btn:hover {
  color: var(--text-secondary);
}
.toggle-btn.active {
  background: var(--accent);
  color: white;
}

.font-option,
.option-btn,
.direction-btn {
  padding: 0.5rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}
.font-option:hover,
.option-btn:hover,
.direction-btn:hover {
  border-color: var(--border-hover);
}
.font-option.selected,
.option-btn.selected,
.direction-btn.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--text-primary);
}
.font-option {
  padding: 0.5rem 0.625rem;
  font-size: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.option-btn {
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.option-btn:hover {
  color: var(--text-primary);
}
.direction-btn {
  font-size: 1rem;
  color: var(--text-muted);
}
.direction-btn:hover {
  color: var(--text-secondary);
}

.font-grid,
.options-grid,
.direction-grid {
  display: grid;
  gap: 0.375rem;
}
.font-grid {
  grid-template-columns: repeat(2, 1fr);
  max-height: 180px;
  overflow-y: auto;
  padding-right: 0.5rem;
}
.options-grid {
  grid-template-columns: repeat(3, 1fr);
}
.options-grid.cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.options-grid.cols-4,
.direction-grid {
  grid-template-columns: repeat(4, 1fr);
}

.font-grid::-webkit-scrollbar,
.code-output::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}
.font-grid::-webkit-scrollbar-track,
.code-output::-webkit-scrollbar-track {
  background: transparent;
}
.font-grid::-webkit-scrollbar-thumb,
.code-output::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.color-row,
.color-field,
.inline-group,
.checkbox-group {
  display: flex;
  align-items: center;
}
.color-row {
  gap: 1rem;
}
.color-field {
  gap: 0.5rem;
  flex: 1;
}
.color-field label {
  min-width: 35px;
}
.inline-group,
.checkbox-group {
  gap: 0.5rem;
}
.inline-group {
  margin-top: 0.625rem;
}

.color-picker {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
  padding: 0;
}
.color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}
.color-picker::-webkit-color-swatch {
  border: 2px solid var(--border);
  border-radius: 4px;
}

.slider-group {
  margin-top: 0.75rem;
}
.slider-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}
.slider-label span:last-child {
  color: var(--text-secondary);
  font-family: "JetBrains Mono", monospace;
}
.slider {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-input);
  border-radius: 2px;
  outline: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.15s;
}
.slider::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
  cursor: pointer;
}
.checkbox-group label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.collapsible-settings {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  display: none;
}
.collapsible-settings.visible {
  display: block;
}

.output-panel {
  position: sticky;
  top: 2rem;
}
.preview-area {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  min-height: 120px;
  max-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  margin-bottom: 1rem;
  overflow: hidden;
}

#previewContent {
  width: 100%;
  max-width: 100%;
  max-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
#previewContent svg {
  max-width: 100%;
  overflow: hidden;
}

.code-output {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.875rem;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  font-size: 0.7rem;
  line-height: 1.6;
  max-height: 150px;
  overflow: auto;
  word-break: break-all;
  color: var(--accent-hover);
}

.copy-btn {
  width: 100%;
  padding: 0.875rem;
  margin-top: 0.75rem;
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
  color: white;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.copy-btn:hover {
  background: var(--accent-hover);
}
.copy-btn:active {
  transform: scale(0.98);
}
.copy-btn.copied {
  background: var(--success);
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 1rem 0;
}
.subsection {
  padding: 0.75rem;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  margin-top: 0.75rem;
}
.subsection-title {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}