:root {
  --pink-primary: #ff4785;
  --pink-light: #ff7096;
  --pink-glow: rgba(255, 71, 133, 0.5);
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --text-main: #f0f0f0;
  --text-muted: #b0a8b9;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  background: linear-gradient(135deg, #150a16, #2a1124, #150a16);
  background-size: 400% 400%;
  animation: gradientBG 15s ease infinite;
  color: var(--text-main);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  margin: 0;
  height: 100vh;
  box-sizing: border-box;
}

@keyframes gradientBG {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

h1 {
  margin-bottom: 5px;
  font-weight: 300;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 0.9em;
  text-align: center;
}

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.controls {
  padding: 20px;
  border-radius: 12px;
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
  width: 100%;
  max-width: 900px;
  box-sizing: border-box;
}

input[type="file"] {
  color: var(--text-muted);
  font-size: 0.9em;
}

input[type="file"]::file-selector-button {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--glass-border);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  margin-right: 15px;
}

input[type="file"]::file-selector-button:hover {
  background: rgba(255, 255, 255, 0.2);
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px 15px;
  border-radius: 10px;
  min-width: 220px;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

label {
  font-size: 0.75em;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

input[type="number"] {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
  color: var(--pink-light);
  font-weight: bold;
  padding: 4px 6px;
  border-radius: 6px;
  width: 50px;
  text-align: right;
  font-family: monospace;
  transition: all 0.2s;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--pink-primary);
  box-shadow: 0 0 8px var(--pink-glow);
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
  width: 100%;
  height: 6px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--pink-light);
  cursor: pointer;
  margin-top: -5px;
  box-shadow: 0 0 10px var(--pink-glow);
  transition: transform 0.1s;
}

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

.stats-panel {
  padding: 12px 15px;
  border-radius: 10px;
  font-family: monospace;
  font-size: 1.1em;
  color: var(--text-muted);
  margin-left: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 120px;
}

.stat-value {
  font-weight: bold;
  color: var(--pink-light);
  float: right;
  margin-left: 15px;
  text-shadow: 0 0 5px rgba(255, 112, 150, 0.3);
}

button {
  background: linear-gradient(135deg, var(--pink-primary), var(--pink-light));
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: bold;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  height: fit-content;
  box-shadow: 0 4px 15px var(--pink-glow);
}

button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 71, 133, 0.7);
}

button:disabled {
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.2);
  box-shadow: none;
  border: 1px solid var(--glass-border);
  cursor: not-allowed;
}

#preview-container {
  position: relative;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  width: 100%;
  max-width: 900px;
  flex-grow: 1;
  /* Subtle dark/glass checkerboard pattern */
  background-color: rgba(0, 0, 0, 0.2);
  background-image:
    linear-gradient(45deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255, 255, 255, 0.02) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255, 255, 255, 0.02) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255, 255, 255, 0.02) 75%);
  background-size: 20px 20px;
  background-position:
    0 0,
    0 10px,
    10px -10px,
    -10px 0px;
  overflow: hidden;
  cursor: grab;
  backdrop-filter: blur(5px);
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.5);
}

#preview-container:active {
  cursor: grabbing;
}

#zoom-wrapper {
  position: absolute;
  transform-origin: 0 0;
}

canvas {
  display: block;
  opacity: 0.5;
}

svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

path {
  fill: none;
  stroke: var(--pink-light); /* Matched to pink theme */
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
  filter: drop-shadow(
    0 0 3px rgba(255, 112, 150, 0.6)
  ); /* Glowing effect on paths */
}

#zoom-hint {
  position: absolute;
  bottom: 15px;
  left: 15px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  border: 1px solid var(--glass-border);
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.8em;
  pointer-events: none;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}