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

/* Page base */
body {
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  color: #e5e7eb;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

/* Main card */
.app-container {
  width: 100%;
  max-width: 460px;
  padding: 25px;
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(18px);
  border-radius: 22px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Titles */
.main-title {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -1px;
  color: #c084fc;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 0.9rem;
  color: #c7d2fe;
  margin-bottom: 30px;
}

/* Drawing canvas */
.canvas-box {
  background: #000;
  border-radius: 16px;
  padding: 6px;
  display: inline-block;
  border: 2px solid rgba(192, 132, 252, 0.7);
  box-shadow: 0 0 30px rgba(192, 132, 252, 0.35);
  touch-action: none;
}

#main-canvas {
  border-radius: 12px;
  touch-action: none;
}

/* Button */
.controls {
  margin-top: 18px;
}

.btn {
  padding: 10px 28px;
  border: none;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, #a855f7, #22d3ee);
  color: #020617;
  transition: all 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(168, 85, 247, 0.4);
}

.btn:active {
  transform: scale(0.96);
}

/* Prediction area */
.prediction-panel {
  margin-top: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 18px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Small labels */
.label {
  display: block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #a5b4fc;
  margin-bottom: 6px;
}

/* Prediction number */
#prediction-text {
  font-size: 4.2rem;
  font-weight: 900;
  background: linear-gradient(135deg, #c084fc, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

/* Mini input preview */
.preview-box {
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  padding-left: 20px;
}

#mini-canvas {
  background: #000;
  border: 1px solid rgba(192, 132, 252, 0.8);
  width: 56px;
  height: 56px;
  image-rendering: pixelated;
  border-radius: 6px;
}