:root {
  --primary-bg: #0b0b1a; /* deep dark space/fantasy blue */
  --canvas-bg: #131429;
  --panel-bg: rgba(20, 21, 39, 0.85); /* glassmorphism */

  --accent-gold: #ffd700;
  --accent-green: #32cd32;
  --accent-red: #ff4444;
  --accent-blue: #4169e1;

  --text-main: #ffffff;
  --text-muted: #bbbbbb;

  --shadow-gold: 0 0 15px rgba(255, 215, 0, 0.6);
  --shadow-blue: 0 0 20px rgba(65, 105, 225, 0.5);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--primary-bg);
  background-image: radial-gradient(circle at center, #1a1b38 0%, #05050f 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  overflow: hidden;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

#game-wrapper {
  position: relative;
  width: 400px;
  height: 700px;
  background-color: var(--canvas-bg);
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.8),
    var(--shadow-blue);
  border-radius: 12px;
  overflow: hidden;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Glassmorphism Overlays */
#ui-overlay,
#message-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: rgba(5, 5, 15, 0.7);
  backdrop-filter: blur(8px); /* glass effect */
  z-index: 10;
}

#top-controls {
  position: absolute;
  top: 15px;
  right: 15px;
  z-index: 5;
}

#speed-btn {
  padding: 8px 15px;
  font-size: 14px;
  background: rgba(20, 21, 39, 0.85);
  border: 1px solid var(--accent-blue);
  color: var(--text-main);
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  text-transform: uppercase;
  font-weight: bold;
  transition: all 0.2s;
}

#speed-btn:hover {
  background: var(--accent-blue);
  color: #fff;
  transform: translateY(-2px);
}


#ui-overlay {
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

#ui-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.overlay-title {
  color: var(--accent-gold);
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 30px;
  text-shadow:
    var(--shadow-gold),
    0 4px 6px rgba(0, 0, 0, 0.5);
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

.card-container {
  display: flex;
  gap: 15px;
  padding: 15px;
  perspective: 1000px;
}

/* Beautiful Premium Cards */
.card {
  width: 105px;
  height: 150px;
  background: var(--panel-bg);
  border: 2px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
}

.card:hover {
  transform: translateY(-8px) scale(1.05);
  box-shadow:
    0 15px 25px rgba(0, 0, 0, 0.7),
    0 0 15px currentColor;
}

.card:active {
  transform: translateY(-2px) scale(0.98);
}

.card.summon {
  color: var(--accent-green);
  border-color: rgba(50, 205, 50, 0.3);
  background: linear-gradient(to bottom, #112a14, #1b3d20);
}
.card.summon:hover {
  border-color: var(--accent-green);
}

.card.upgrade {
  color: #bbbbbb;
  border-color: rgba(187, 187, 187, 0.3);
  background: linear-gradient(to bottom, #222222, #333333);
}
.card.upgrade:hover {
  border-color: #bbbbbb;
}

.card.heal {
  color: var(--accent-red);
  border-color: rgba(255, 68, 68, 0.3);
  background: linear-gradient(to bottom, #300f0f, #4a1515);
}
.card.heal:hover {
  border-color: var(--accent-red);
}

.card-title {
  color: #fff;
  font-size: 14px;
  font-weight: bold;
  margin-bottom: 8px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.card-desc {
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.3;
}

#message-overlay {
  display: none; /* toggled in JS */
  z-index: 20;
}

#message-text {
  font-size: 45px;
  font-weight: 900;
  margin-bottom: 25px;
  text-shadow: 0 0 20px rgba(0, 0, 0, 0.8);
  letter-spacing: 2px;
}

button {
  padding: 12px 30px;
  font-size: 20px;
  cursor: pointer;
  background: linear-gradient(to bottom, #ffe866, #ffd700);
  border: none;
  border-radius: 8px;
  color: #111;
  font-weight: bold;
  box-shadow:
    0 4px 10px rgba(0, 0, 0, 0.5),
    inset 0 2px 2px rgba(255, 255, 255, 0.4);
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

button:hover {
  transform: translateY(-2px);
  box-shadow:
    0 6px 15px rgba(255, 215, 0, 0.4),
    inset 0 2px 2px rgba(255, 255, 255, 0.6);
  background: linear-gradient(to bottom, #fff099, #ffdf33);
}

button:active {
  transform: translateY(1px);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}