/* style.css */
:root {
  --bg-color: #101018;
  --text-color: #e0e0e5;
  --primary-neon: #00f2ff;
  --secondary-neon: #ff00d4;
  --accent-neon: #00ff88;
  --panel-bg: #1a1a25;
  --border-color: #333344;
  --input-bg: #252530;
}

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

html, body {
  height: 100%;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.main-container {
  display: flex;
  height: 100vh;
  width: 100vw;
}

/* ── Panel ── */
.controls-panel {
  width: 340px;
  background-color: var(--panel-bg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  flex-shrink: 0;
}

header h1 {
  color: white;
  font-size: 1.2em;
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}

header p {
  font-size: 0.8em;
  font-weight: 300;
  opacity: 0.6;
}

.attribution {
  font-size: 0.72em !important;
  margin-top: 5px !important;
  opacity: 0.45 !important;
}

.attribution a {
  color: var(--primary-neon);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.attribution a:hover { opacity: 1; }

.gradient-link {
  background: linear-gradient(90deg, #ec4899, #facc15, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent !important;
  text-decoration: none;
  position: relative;
  opacity: 1 !important;
}

.gradient-link::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, #ec4899, #facc15, #3b82f6);
  transition: width 0.3s ease;
}

.gradient-link:hover::after { width: 100%; }

/* ── Section label ── */
.section-label {
  font-size: 0.75em;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary-neon);
  opacity: 0.7;
  margin-bottom: 8px;
}

/* ── Palette ── */
.palette-section {
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

#palette-grid {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}

.palette-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 6px 5px 4px;
  background: var(--input-bg);
  border: 2px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
  min-width: 46px;
}

.palette-btn:hover {
  border-color: rgba(0, 242, 255, 0.4);
  transform: scale(1.05);
}

.palette-btn.active {
  border-color: var(--primary-neon);
  box-shadow: 0 0 8px rgba(0, 242, 255, 0.4);
}

.palette-swatches {
  display: flex;
  gap: 2px;
}

.palette-name {
  font-size: 0.58em;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-color);
  opacity: 0.6;
  white-space: nowrap;
}

.palette-btn.active .palette-name {
  opacity: 1;
  color: var(--primary-neon);
}

.palette-swatch {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

/* ── Controls ── */
.control-group {
  margin-bottom: 12px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-group label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.88em;
  font-weight: 400;
}

.value-display {
  font-weight: 700;
  color: var(--primary-neon);
}

input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--input-bg);
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid var(--border-color);
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--primary-neon);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 8px var(--primary-neon);
  transition: transform 0.15s ease;
}

input[type=range]:active::-webkit-slider-thumb {
  transform: scale(1.2);
}

select, input[type="color"] {
  width: 100%;
  height: 40px;
  padding: 0 12px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  color: var(--text-color);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.2s;
  outline: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2300f2ff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 10px center;
  background-repeat: no-repeat;
}

select:hover, input[type="color"]:hover {
  border-color: var(--primary-neon);
}

/* ── Advanced collapsible ── */
.advanced-details {
  border-top: 1px solid var(--border-color);
  padding-top: 10px;
  margin-top: 4px;
}

.advanced-details > summary {
  cursor: pointer;
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-color);
  opacity: 0.45;
  list-style: none;
  outline: none;
  padding: 4px 0;
  transition: opacity 0.2s;
}

.advanced-details > summary:hover { opacity: 0.7; }
.advanced-details > summary::-webkit-details-marker { display: none; }
.advanced-details > summary::before { content: '▸  '; }
.advanced-details[open] > summary::before { content: '▾  '; }

.advanced-details > .control-group {
  margin-top: 10px;
}

/* ── Transforms section ── */
.xforms-section {
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
}

.xforms-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.add-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--primary-neon);
  font-size: 0.8em;
  cursor: pointer;
  padding: 4px 10px;
  transition: all 0.2s;
}

.add-btn:hover {
  border-color: var(--primary-neon);
  background: rgba(0, 242, 255, 0.08);
}

/* ── Individual xform card ── */
.xform {
  background: rgba(0, 0, 0, 0.25);
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 8px;
  border-left: 3px solid var(--border-color);
  transition: border-color 0.3s;
}

.xform:hover {
  border-left-color: var(--primary-neon);
}

.xform-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.xform-header h4 {
  font-size: 0.85em;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary-neon);
  opacity: 0.8;
}

.remove-xform-btn {
  background: none;
  border: none;
  color: #ff4d4d;
  cursor: pointer;
  font-size: 1.3em;
  line-height: 1;
  padding: 0 4px;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.remove-xform-btn:hover { opacity: 1; }

/* Twin side-by-side groups */
.twin-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Color picker compact */
.xform .xform-color {
  height: 36px;
}

/* ── Action buttons ── */
.action-buttons {
  display: flex;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  flex-shrink: 0;
}

.glow-button {
  flex-grow: 1;
  padding: 11px;
  background: transparent;
  border: 2px solid var(--primary-neon);
  border-radius: 6px;
  color: var(--primary-neon);
  font-size: 0.95em;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s ease;
  letter-spacing: 0.03em;
}

.glow-button:hover {
  background-color: var(--primary-neon);
  color: var(--bg-color);
  box-shadow: 0 0 14px var(--primary-neon);
}

.glow-button.secondary {
  border-color: var(--secondary-neon);
  color: var(--secondary-neon);
}

.glow-button.secondary:hover {
  background-color: var(--secondary-neon);
  color: var(--bg-color);
  box-shadow: 0 0 14px var(--secondary-neon);
}

.glow-button.accent {
  border-color: var(--accent-neon);
  color: var(--accent-neon);
}

.glow-button.accent:hover {
  background-color: var(--accent-neon);
  color: var(--bg-color);
  box-shadow: 0 0 14px var(--accent-neon);
}

/* ── Canvas ── */
.canvas-container {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  position: relative;
  touch-action: none;
}

#fractal-canvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.canvas-container.transparent-bg {
  background: repeating-conic-gradient(#2a2a35 0% 25%, #1a1a25 0% 50%) 0 0 / 24px 24px;
}

/* ── Loading ── */
#loading-indicator {
  position: absolute;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 18px 28px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1.1em;
  backdrop-filter: blur(5px);
}

.spinner {
  border: 4px solid rgba(255, 255, 255, 0.25);
  border-top: 4px solid var(--primary-neon);
  border-radius: 50%;
  width: 28px;
  height: 28px;
  animation: spin 1s linear infinite;
}

@keyframes spin { 100% { transform: rotate(360deg); } }

/* ── Responsive ── */
@media (max-width: 900px) {
  .main-container { flex-direction: column; }
  .controls-panel {
    width: 100%;
    max-height: 55vh;
    min-height: 220px;
    border-bottom: 2px solid var(--primary-neon);
    overflow-y: auto;
  }
  .xforms-section {
    flex: none;
    min-height: 180px;
    overflow-y: visible;
  }
  .canvas-container {
    flex: 1;
    min-height: 220px;
  }
}

@media (max-width: 768px) and (orientation: landscape) {
  .main-container { flex-direction: row; }
  .controls-panel {
    width: 45vw;
    height: 100vh;
    max-height: none;
    border-bottom: none;
    border-right: 2px solid var(--primary-neon);
  }
  .xforms-section {
    flex: 1;
    overflow-y: auto;
  }
  .canvas-container { width: 55vw; height: 100vh; }
}