:root {
  --bg: #05060a;
  --bg-alt: #11121a;
  --panel: rgba(0, 0, 0, 0.402);
  --accent: #000000;
  --accent-strong: #ffca61;
  --accent-glow: rgb(255, 187, 51);
  --text: #e2b100;
  --muted: rgba(253, 244, 227, 0.65);
  --border-cream: rgba(255, 149, 0, 0.403);
  --shadow-lg: 0 4px 10px rgba(255, 166, 0, 0.162);
}

html,
body {
  margin: 0;
  padding: 0;
}

canvas {
  display: block;
}

body {
  box-sizing: border-box;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 32px 24px 48px;
  background: radial-gradient(
      circle at 24% 18%,
      rgba(255, 123, 0, 0.18),
      transparent 52%
    ),
    radial-gradient(circle at 78% -8%, rgba(255, 123, 0, 0.12), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", Arial, sans-serif;
}

/* Primary wrapper that positions the ASCII output beside the settings panel */
.layout {
  width: min(1100px, 100%);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: clamp(20px, 4vw, 48px);
  flex-wrap: wrap;
  padding-right: 360px;
  position: relative;
}

/* Flexible region that holds the ASCII art canvas */
.ascii-container {
  flex: 1 1 420px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  position: relative;
  width: 100%;
  max-width: 720px;
}

/* Fixed side panel that keeps the controls visible while scrolling */
.settings-panel {
  width: 320px;
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: fixed;
  top: 40px;
  right: clamp(24px, 6vw, 64px);
  margin-left: 0;
  z-index: 10;
  overflow: visible;
}

/* Vertical stack for all control groups within the panel */
.controls {
  display: flex;
  flex-direction: column;
  gap: 9px;
  flex: 1;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.controls::-webkit-scrollbar {
  width: 0;
  height: 0;
}

/* Collapsible control group container styling */
.control-dropdown {
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border-cream);
  transition: border 0.2s ease, transform 0.2s ease;
}

/* Header row that toggles the dropdown details */
.control-summary {
  margin: 0;
  padding: 16px 18px;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  user-select: none;
}

.control-summary::-webkit-details-marker {
  display: none;
}

.control-summary::after {
  content: "▽";
  font-size: 1rem;
  letter-spacing: normal;
  color: var(--text);
  transition: transform 0.2s ease;
}

.control-dropdown[open] .control-summary::after {
  transform: rotate(-180deg);
}

/* Content area for form fields inside a dropdown */
.control-body {
  padding: 16px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.control-body > * {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

/* Small label text for showing current control values */
.control-value {
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #ffe9b2;
}

/* Generic button styling used by actions in the panel */
.control-button {
  width: 100%;
  border: 1px solid var(--border-cream);
  border-radius: 8px;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.75);
  color: var(--text);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.control-button:hover {
  transform: translateY(-2px);
  border-color: rgba(253, 244, 227, 0.8);
}

.control-button:active {
  transform: translateY(0);
}

/* Styled block that renders the ASCII art output text */
.ascii-output {
  font-family: "Courier New", monospace;
  white-space: pre;
  line-height: 1;
  font-size: 8px;
  display: inline-block;
  padding: 20px;
  border-radius: 12px;
  /* border: 1px solid var(--border-cream); */
  background: rgba(7, 6, 10, 0.92);
  color: var(--text);
  transition: text-shadow 0.3s ease, border-color 0.3s ease;
}

/* Base styling shared by select boxes, numeric inputs, and file picker */
.control-select,
.custom-input,
input[type="file"] {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  background: rgba(12, 13, 19, 0.85);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.95rem;
  transition: border 0.2s ease, transform 0.2s ease;
}

.control-select:focus,
.custom-input:focus,
input[type="file"]:focus {
  border-color: rgba(253, 244, 227, 0.85);
  box-shadow: none;
  outline: none;
  transform: translateY(-1px);
}

/* Swatch input that shows the currently selected color */
.control-color {
  width: 100%;
  height: 32px;
  border-radius: 16px;
  border: 1px solid var(--border-cream);
  background: rgba(12, 13, 19, 0.85);
  box-shadow: none;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.control-color::-webkit-color-swatch {
  border: none;
  border-radius: 10px;
  background: transparent;
}

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

.control-color::-moz-color-swatch {
  border: none;
  border-radius: 16px;
}

/* Wrapper for toggle rows pairing label text with a checkbox */
.control-toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
}

/* Custom checkbox styling for toggle inputs */
.control-toggle input {
  appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 1px solid var(--border-cream);
  background: rgba(12, 13, 19, 0.9);
  box-shadow: none;
  position: relative;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.control-toggle input:checked {
  background: var(--accent);
}

.control-toggle input:checked::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 8px;
  width: 6px;
  height: 12px;
  border-right: 2px solid #ffc14e;
  border-bottom: 2px solid #ffc14e;
  transform: rotate(40deg);
}

input[type="file"]::file-selector-button,
input[type="file"]::-webkit-file-upload-button {
  background: var(--accent);
  color: var(--text);
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid rgba(255, 123, 0, 0.35);
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 0.95rem;
  box-shadow: none;
  transition: transform 0.2s ease;
}

input[type="file"]::file-selector-button:hover,
input[type="file"]::-webkit-file-upload-button:hover {
  transform: translateY(-1px);
}

/* Range slider track styling shared across browsers */
.control-slider {
  width: 100%;
  appearance: none;
  height: 28px;
  border-radius: 14px;
  background: rgba(255, 123, 0, 0.282);
}

.control-slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 9px;
  background: var(--text);
  cursor: pointer;
  transition: transform 0.25s ease;
}

.control-slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

.control-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 10px;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.control-slider::-moz-range-thumb:hover {
  transform: scale(1.1);
}