:root {
  --bg-dark: #121214; 
  --primary: #767fe8; 
  --primary-hover: #5e68d6;
  --success: #10b981;
  --success-hover: #059669;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --warning: #f59e0b;
  --text-main: #ffffff;
  --text-muted: #9ca3af;
  --text-outline: #25284b; 
  
  --border-color: #3b3f8c;
  --panel-bg: #1a1b23; 
}

/* Base Body */
body {
  margin: 0;
  padding: 0;
  font-family: 'Outfit', 'Noto Sans JP', sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  height: 100vh;
  width: 100vw;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  position: relative;
}

/* Background Decorations layer */
.cyber-bg-layer {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: 0;
  overflow: hidden;
  background-image: radial-gradient(circle at 1px 1px, #ffffff 1px, transparent 1px); 
  background-size: 40px 40px;
  background-position: -19px -19px;
  opacity: 0.1;
}

/* Giant slanted purple polygon */
.bg-slant-purple {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 90%;
  height: 120%;
  background-color: var(--primary);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0% 100%);
  z-index: 1;
  opacity: 1 !important; 
}

/* App layer */
#app {
  width: 100%;
  max-width: 1200px;
  height: 100vh;
  position: relative;
  z-index: 10; 
  display: flex;
  flex-direction: column;
}

.hidden { display: none !important; }
.active { display: flex !important; }

/* Flat Tech Panels replacing glass */
.tech-panel {
  background-color: var(--panel-bg);
  border: 4px solid var(--border-color);
  padding: 1.5rem;
  box-sizing: border-box;
}

/* Lobby */
#lobby-screen {
  flex-direction: column;
  align-items: center;
  margin: auto;
  width: 90%;
  max-width: 500px;
  gap: 1.2rem;
}

.tech-title {
  margin: 0;
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  color: var(--primary);
  text-shadow: 3px 3px 0 var(--text-outline);
}
.tech-subtitle { margin: 0; font-weight: 600; color: #fff; letter-spacing: 1px; text-transform: uppercase; }

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  color: white;
  text-transform: uppercase;
  border-radius: 0;
  transition: transform 0.1s, background-color 0.2s;
  background-color: var(--border-color);
}

.btn:active { transform: translateY(2px); }
.btn.primary { background-color: var(--primary); }
.btn.primary:hover { background-color: var(--primary-hover); }
.btn.success { background-color: var(--success); }
.btn.success:hover { background-color: var(--success-hover); }
.btn.danger { background-color: var(--danger); }
.btn.danger:hover { background-color: var(--danger-hover); }
.btn.disabled { opacity: 0.5; box-shadow: none; cursor: not-allowed; transform: none; background-color: var(--border-color); }

/* Custom game parts */
#game-screen { flex: 1; display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

.tech-header {
  padding: 0.8rem 1.5rem;
  background-color: var(--panel-bg);
  border-bottom: 2px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 800;
}
.accent-text { color: var(--primary); font-size: 1.2em; font-weight: 900; }

.table-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem 4rem 1rem; /* push layout up slightly */
  overflow: hidden;
  gap: 1rem;
}

.board-area {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  justify-content: center;
  width: 100%;
  max-width: 550px;
}

@media (max-width: 600px) {
  .board-area { grid-template-columns: repeat(2, 1fr); }
}

.pile-container {
  background-color: var(--bg-dark);
  border: 4px solid var(--border-color);
  aspect-ratio: 2/3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all 0.2s;
}

.pile-container.asc { border-top-width: 8px; border-top-color: var(--primary); }
.pile-container.desc { border-top-width: 8px; border-top-color: var(--danger); }

.pile-container.valid-drop {
  border-color: var(--success);
  background-color: rgba(16, 185, 129, 0.2);
}
.pile-container.invalid-drop {
  border-color: var(--danger);
  background-color: rgba(239, 68, 68, 0.2);
}

.pile-container.error-flash {
  animation: errorShake 0.4s ease-in-out;
  border-color: var(--danger) !important;
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  50% { transform: translateX(8px); }
  75% { transform: translateX(-4px); }
}

.pile-label {
  position: absolute;
  top: 10px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 900;
  color: var(--text-muted);
  font-size: 1.2rem;
}
.dir-icon {
  position: absolute;
  right: 20%;
}
.pile-container.asc .pile-label {
  top: auto;
  bottom: 10px;
}

.pile-card {
  font-weight: 900;
  font-size: 2.8rem;
  color: var(--text-main);
  text-shadow: 3px 3px 0 var(--border-color);
}

.opponents-area {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.opponent-box {
  background-color: var(--bg-dark);
  border: 2px solid var(--border-color);
  padding: 0.8rem;
  min-width: 120px;
  text-align: center;
  font-weight: 700;
}

.opponent-box.active-turn {
  background-color: var(--primary);
  border-color: #fff;
}

.timer-box {
  font-weight: 900;
  font-size: 2.5rem;
  padding: 0.5rem 1.5rem;
  background-color: var(--bg-dark);
  border: 4px solid var(--border-color);
  margin-top: 1rem;
}
.timer-box.negative {
  color: var(--danger);
  border-color: var(--danger);
}

.tech-footer { 
  padding: 1rem 1.5rem; 
  background-color: var(--panel-bg); 
  border-top: 4px solid var(--border-color); 
  width: 100%; 
  box-sizing: border-box; 
}

.hand-interface {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  min-height: 120px;
}

.hand-section {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#end-turn-btn {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
}

#my-hand-container { 
  display: flex; 
  gap: 0.8rem; 
  justify-content: center; 
  flex-wrap: wrap; 
}

.player-card {
  width: 60px;
  height: 90px;
  background-color: #ffffff;
  color: #000;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 2rem;
  font-weight: 900;
  border: 4px solid #000;
  cursor: grab;
  user-select: none;
  transition: transform 0.1s;
}

.player-card:hover { transform: translateY(-10px); z-index: 10; border-color: var(--primary); }
.player-card.dragging { opacity: 0.3; }
.player-card.selected { transform: translateY(-12px); border-color: var(--primary); background-color: var(--primary); color: #fff; }

/* Modals */
.modal-overlay {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--panel-bg);
  border: 4px solid var(--primary);
  padding: 2rem;
  text-align: center;
  z-index: 1000;
  min-width: 300px;
  display: flex;
  flex-direction: column;
}