:root {
  --background-color: #1a1a1d;
  --primary-text-color: #c5c6c7;
  --secondary-text-color: #8f8f8f;
  --accent-color: #61dafb;
  --card-background: #2a2a2e;
  --card-border-color: #4f4f51;
  --button-background: #4f4f51;
  --button-hover-background: #6b6b6e;
  --mystic-purple: rgba(120, 80, 200, 0.35);
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu",
    "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;

  /* 背景：深色 + 深紫 + 煙霧感 */
  background:
        /* 主空間漸層（修正後：紫色更暗、更收斂） */
    radial-gradient(
      circle at top center,
      rgba(80, 50, 120, 0.25) 0%,
      /* 原本太亮 → 降亮度 + 降 alpha */ rgba(30, 25, 45, 0.85) 35%,
      /* 更快進入暗場 */ rgba(10, 10, 15, 1) 70%
    ),
    /* 煙霧紋理層（保持不動） */
    repeating-radial-gradient(
        circle,
        rgba(255, 255, 255, 0.012),
        rgba(255, 255, 255, 0.012) 1px,
        transparent 1px,
        transparent 6px
      );

  color: var(--primary-text-color);
  margin: 0;
  padding: 20px;

  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.app-container {
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.55),
    rgba(0, 0, 0, 0.35) 60%,
    rgba(0, 0, 0, 0.15)
  );
  border-radius: 16px;
  padding: 2rem 1.5rem;
}

.app-header h1 {
  font-weight: 300;
  font-size: 2.5rem;
  color: var(--primary-text-color);
  margin-bottom: 2rem;
}

.controls {
  margin-bottom: 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.spread-selection label {
  margin: 0 0.5rem;
  cursor: pointer;
}

.button {
  padding: 10px 20px;
  font-size: 1rem;
  cursor: pointer;
  background-color: var(--button-background);
  color: var(--primary-text-color);
  border: 1px solid var(--card-border-color);
  border-radius: 5px;
  transition: background-color 0.3s ease;
}

.button:hover {
  background-color: var(--button-hover-background);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.reading {
  min-height: 400px;
}

.status-area {
  margin-bottom: 2rem;
  font-size: 1.2rem;
  color: var(--secondary-text-color);
  min-height: 30px;
}

.card-display-area {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

/* Individual Card Styling */
.card {
  width: 150px;
  height: 250px;
  position: relative;
  cursor: pointer; /* Cursor remains on the outer card for click */
  perspective: 1000px; /* For 3D flip effect */
}

.card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s;
  transform: translateY(20px); /* Initial position for animation */
}

.card-inner.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
}

.card-face--back {
  background-color: var(--card-background);
  border: 2px solid var(--card-border-color);
  /* Simple pattern for card back */
  background-image: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.05) 10px,
    transparent 10px,
    transparent 20px
  );
}

.card-face--front {
  background-color: var(--card-background);
  border: 2px solid var(--accent-color);
  transform: rotateY(180deg);
  font-size: 1rem;
  flex-direction: column;
  padding: 10px;
}

.card-face--front img {
  max-width: 90%;
  max-height: 70%;
  border-radius: 5px;
}

.card-face--front.reversed img {
  transform: rotate(180deg);
}

.card-narrative {
  margin-top: 2rem;
  text-align: left;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  background: var(--card-background);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--card-border-color);
}

.card-narrative h3 {
  color: var(--accent-color);
}

@media (max-width: 600px) {
  .app-header h1 {
    font-size: 2rem;
  }

  .controls {
    flex-direction: column;
  }

  .card {
    width: 100px;
    height: 167px;
  }
}

.card-emoji {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 0.5rem;
}

.card-name {
  font-size: 1rem;
  color: var(--accent-color);
  font-weight: bold;
  margin-bottom: 0.5rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.spread-summary {
  margin-top: 2rem;
  text-align: left;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  background: var(--card-background);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--accent-color);
}

.spread-summary h3 {
  color: var(--accent-color);
  text-align: center;
  margin-bottom: 1rem;
}

.spread-summary p {
  white-space: pre-wrap; /* Preserve newlines from the summary text */
}

#meditation-prompt {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--accent-color);
  margin-top: 2rem;
  text-align: center;
  background: var(--card-background);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--accent-color);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}