:root {
  /* Background */
  --theme-bg: radial-gradient(circle at 50% -20%, #2b1055 0%, #000000 80%);

  /* Shape Colors */
  --color-0: #0abdc6; /* Cyan */
  --color-1: #f3e600; /* Yellow */
  --color-2: #ea00d9; /* Magenta */

  /* UI & Feedback Colors */
  --color-success: #44ff44;
  --color-error: #ff4444;
  --color-glass-bg: rgba(20, 10, 35, 0.7);
  --color-glass-border: #3a205e;

  /* Text Colors */
  --text-main: #ffffff;
  --text-muted: #cccccc;
}

/* NEW THEME: Fantasy Forest */
body.theme-fantasy {
  --theme-bg: radial-gradient(circle at 50% -20%, #1c2b1a 0%, #050a05 80%);
  --color-0: #e0c070; /* Aged Gold */
  --color-1: #d3734a; /* Terracotta */
  --color-2: #84a98c; /* Sage Green */
  --color-success: #e0c070;
  --color-error: #8b3a3a;
  --color-glass-bg: rgba(20, 30, 20, 0.8);
  --color-glass-border: #4a5e4a;
}

/* NEW THEME: Neon Cyberpunk */
body.theme-cyberpunk {
  --theme-bg: radial-gradient(circle at 50% -20%, #20002c 0%, #000000 80%);
  --color-0: #00e5ff;
  --color-1: #f3e600;
  --color-2: #ff0055;
  --color-success: #00e5ff;
  --color-error: #ff0055;
  --color-glass-bg: rgba(15, 0, 25, 0.7);
  --color-glass-border: #ff0055;
}

/* NEW THEME: Classic Light */
body.theme-light {
  --theme-bg: #f8f9fa;
  --color-0: #e53935; /* Classic Red */
  --color-1: #43a047; /* Classic Green */
  --color-2: #8e24aa; /* Classic Purple */
  --color-success: #43a047;
  --color-error: #e53935;
  --color-glass-bg: #ffffff;
  --color-glass-border: #d1d5db;
  --text-main: #111827;
  --text-muted: #4b5563;
}

/* 1. Background & Base */
body {
  padding: 1rem 0;
  background: var(--theme-bg);
  color: #fff;
  min-height: 100vh;
}

/* 2. Top Bar & Pills */
.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 1rem;
}
.stats-container {
  display: flex;
  gap: 1rem;
}
.neon-pill {
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}
.score-pill {
  color: var(--color-0);
  border: 2px solid var(--color-0);
  box-shadow:
    0 0 8px color-mix(in srgb, var(--color-0) 30%, transparent),
    inset 0 0 8px color-mix(in srgb, var(--color-0) 15%, transparent);
}
.deck-pill {
  color: var(--color-2);
  border: 2px solid var(--color-2);
  box-shadow:
    0 0 8px color-mix(in srgb, var(--color-2) 30%, transparent),
    inset 0 0 8px color-mix(in srgb, var(--color-2) 15%, transparent);
}

/* Menu Button & Expanding Row */
.menu-toggle {
  border-radius: 50px;
  margin-bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  border-color: #fff;
}
.menu-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding: 1rem;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: 12px;
  backdrop-filter: blur(5px);
}
.menu-actions.hidden {
  display: none;
}
.menu-actions button,
.menu-actions select {
  flex: 1 1 auto;
  margin-bottom: 0;
  border-radius: 50px;
  background: rgba(0, 0, 0, 0.4);
  border-color: color-mix(in srgb, var(--text-main) 40%, transparent);
  color: var(--text-main);
}
.menu-actions button:hover,
.menu-actions select:hover {
  background: color-mix(in srgb, var(--text-main) 10%, transparent);
  border-color: var(--text-main);
}

/* 3. The Grid */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 1fr;
  gap: 0.75rem;
  margin-bottom: 2rem;
}
@media (min-width: 600px) {
  .board {
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
  }
  body {
    padding: 2rem 0;
  }
}

/* 4. Cards */
.card {
  padding: 0.5rem;
  text-align: center;
  background: var(--color-glass-bg);
  border: 2px solid var(--color-glass-border);
  border-radius: 12px;
  cursor: pointer;
  user-select: none;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  min-height: 100px;
  -webkit-tap-highlight-color: transparent;
  backdrop-filter: blur(5px);
}
@media (min-width: 600px) {
  .card {
    padding: 1rem;
    min-height: 140px;
  }
}

/* Hover: Pale White/Grey Glow */
@media (hover: hover) {
  .card:hover {
    border-color: #ccc;
    box-shadow:
      0 0 15px rgba(255, 255, 255, 0.2),
      inset 0 0 10px rgba(255, 255, 255, 0.05);
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.05);
  }
}

/* Selected: Clean White Outline */
.card.selected {
  border-color: #fff;
  box-shadow:
    0 0 20px rgba(255, 255, 255, 0.4),
    inset 0 0 15px rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.02);
}

/* Hinted: Gentle Glow matching color-1 */
.card.hinted {
  border-style: dashed;
  border-color: var(--color-1);
  box-shadow: 0 0 15px color-mix(in srgb, var(--color-1) 30%, transparent);
}

/* 5. SVG Shapes & Glowing Filters */
.shape-container {
  width: 100%;
  max-width: 60px;
  height: auto;
  max-height: 35px;
  margin: 4px 0;
  transition: filter 0.3s ease;
}

/* 6. History Section Restyled */
.history-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  border: 1px solid var(--color-glass-border);
}
.mini-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.25rem;
  background: rgba(20, 10, 35, 0.8);
  border: 1px solid #4a2b75;
  border-radius: 6px;
  min-height: 50px;
}
.mini-card .shape-container {
  max-width: 25px;
  max-height: 15px;
  margin: 1px 0;
}

/* 7. Toast Notification Restyled */
#message-toast {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translate(-50%, -20px);
  z-index: 1000;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  background: rgba(10, 5, 20, 0.95);
  border: 2px solid #ccc;
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
  color: #fff;
  font-weight: bold;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
  backdrop-filter: blur(4px);
  letter-spacing: 1px;
  text-transform: uppercase;
}
#message-toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}