@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Press+Start+2P&family=Rajdhani:wght@500;700&display=swap');

:root {
  --bg-primary: #0a051b;
  --bg-secondary: #140b2e;
  --neon-cyan: #00f0ff;
  --neon-pink: #ff007f;
  --neon-yellow: #ffde00;
  --neon-purple: #9d00ff;
  --neon-orange: #ff5500;
  --text-color: #f0edff;
  --text-muted: #8b80b0;
  --crt-glow: rgba(18, 10, 46, 0.4);
  --glass-bg: rgba(20, 11, 46, 0.65);
  --glass-border: rgba(255, 0, 127, 0.2);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-color);
  font-family: 'Rajdhani', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Background Grid Animation */
.background-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    linear-gradient(rgba(18, 10, 46, 0.85) 0%, rgba(18, 10, 46, 0.95) 100%),
    linear-gradient(90deg, rgba(255, 0, 127, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(255, 0, 127, 0.05) 1px, transparent 1px);
  background-size: 100% 100%, 40px 40px, 40px 40px;
  background-position: center;
  z-index: -2;
  perspective: 500px;
}

.background-grid::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, transparent 20%, rgba(10, 5, 27, 0.9) 80%);
}

/* CRT Scanline and Flicker Effects */
.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
  background-size: 100% 4px, 6px 100%;
  z-index: 999;
  pointer-events: none;
  opacity: 0.15;
}

.crt-screen-flicker {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(18, 10, 46, 0.15);
  opacity: 0;
  z-index: 998;
  pointer-events: none;
  animation: flicker 0.15s infinite;
}

@keyframes flicker {
  0% { opacity: 0.08; }
  50% { opacity: 0.05; }
  100% { opacity: 0.08; }
}

/* Base Wrapper & Navigation Bar */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 2rem;
  background: linear-gradient(180deg, rgba(10, 5, 27, 0.8) 0%, transparent 100%);
  border-bottom: 1px solid rgba(0, 240, 255, 0.15);
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1.8rem;
  letter-spacing: 2px;
  color: #fff;
  text-shadow: 
    0 0 5px rgba(255, 255, 255, 0.5),
    0 0 10px var(--neon-cyan),
    0 0 20px var(--neon-cyan);
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo span {
  color: var(--neon-pink);
  text-shadow: 
    0 0 5px rgba(255, 255, 255, 0.5),
    0 0 10px var(--neon-pink),
    0 0 20px var(--neon-pink);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 15px;
}

/* Cyber Button Styles */
.btn-cyber {
  background: var(--glass-bg);
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: 'Orbitron', sans-serif;
  font-weight: bold;
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  cursor: pointer;
  border-radius: 4px;
  text-shadow: 0 0 5px var(--neon-cyan);
  box-shadow: 
    inset 0 0 5px rgba(0, 240, 255, 0.2),
    0 0 10px rgba(0, 240, 255, 0.2);
  transition: all 0.2s ease-in-out;
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-cyber:hover {
  background: var(--neon-cyan);
  color: var(--bg-primary);
  box-shadow: 0 0 20px var(--neon-cyan);
  text-shadow: none;
}

.btn-cyber.pink {
  border-color: var(--neon-pink);
  color: var(--neon-pink);
  text-shadow: 0 0 5px var(--neon-pink);
  box-shadow: 
    inset 0 0 5px rgba(255, 0, 127, 0.2),
    0 0 10px rgba(255, 0, 127, 0.2);
}

.btn-cyber.pink:hover {
  background: var(--neon-pink);
  color: var(--bg-primary);
  box-shadow: 0 0 20px var(--neon-pink);
  text-shadow: none;
}

.btn-cyber.orange {
  border-color: var(--neon-orange);
  color: var(--neon-orange);
  text-shadow: 0 0 5px var(--neon-orange);
  box-shadow: 
    inset 0 0 5px rgba(255, 85, 0, 0.2),
    0 0 10px rgba(255, 85, 0, 0.2);
}

.btn-cyber.orange:hover {
  background: var(--neon-orange);
  color: var(--bg-primary);
  box-shadow: 0 0 20px var(--neon-orange);
  text-shadow: none;
}

.btn-icon {
  background: transparent;
  border: 1px solid rgba(240, 237, 255, 0.2);
  color: var(--text-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-icon:hover {
  border-color: var(--neon-yellow);
  color: var(--neon-yellow);
  box-shadow: 0 0 10px rgba(255, 222, 0, 0.3);
}

/* Page Sections Control */
.page-section {
  display: none;
  flex: 1;
  padding: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.page-section.active {
  display: block;
  animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- HUB SCREEN DESIGN --- */
.hub-hero {
  text-align: center;
  margin-bottom: 3.5rem;
  margin-top: 1rem;
}

.hub-hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: 4px;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  background: linear-gradient(to right, #fff 20%, var(--neon-cyan) 50%, var(--neon-pink) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 8px rgba(0, 240, 255, 0.3));
}

.hub-hero p {
  color: var(--text-muted);
  font-size: 1.2rem;
  letter-spacing: 1px;
}

/* Game Selection Grid */
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  padding: 1rem 0;
}

.game-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.game-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 0, 127, 0.1) 0%, transparent 60%);
  z-index: 0;
  pointer-events: none;
}

.game-card.active-game {
  border-color: rgba(0, 240, 255, 0.3);
}

.game-card.active-game:hover {
  transform: translateY(-8px);
  border-color: var(--neon-cyan);
  box-shadow: 
    0 12px 40px rgba(0, 240, 255, 0.25),
    0 0 15px rgba(0, 240, 255, 0.15);
}

.game-card.locked-game {
  opacity: 0.65;
  filter: grayscale(40%);
  border-color: rgba(240, 237, 255, 0.05);
}

.game-card-banner {
  height: 170px;
  position: relative;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.game-card-banner .retro-icon {
  font-size: 3.5rem;
  z-index: 1;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.2));
}

.game-card.locked-game .game-card-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 5, 27, 0.7);
}

.lock-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.lock-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(20, 11, 46, 0.9);
  border: 1px solid var(--text-muted);
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-muted);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.locked-badge {
  font-family: 'Orbitron', sans-serif;
  font-size: 0.7rem;
  font-weight: bold;
  letter-spacing: 1px;
  background: rgba(10, 5, 27, 0.9);
  padding: 4px 8px;
  border-radius: 4px;
  color: var(--text-muted);
  border: 1px solid rgba(240, 237, 255, 0.1);
}

.game-card-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 1;
}

.game-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.game-card.active-game .game-title {
  color: #fff;
  text-shadow: 0 0 5px rgba(0, 240, 255, 0.4);
}

.game-card.locked-game .game-title {
  color: var(--text-muted);
}

.game-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.4;
  margin-bottom: 1.5rem;
}

.game-stats {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(240, 237, 255, 0.08);
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.game-stats span strong {
  color: var(--neon-yellow);
}

/* --- TETRIS GAME SCREEN DESIGN --- */
.game-layout {
  display: grid;
  grid-template-columns: 280px 1fr 280px;
  gap: 2rem;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

/* Side Panels */
.side-panel {
  background: var(--glass-bg);
  border: 1px solid rgba(0, 240, 255, 0.15);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
}

.panel-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  color: var(--neon-cyan);
  border-bottom: 1px solid rgba(0, 240, 255, 0.2);
  padding-bottom: 0.5rem;
  text-transform: uppercase;
  text-align: center;
}

.panel-title.pink {
  color: var(--neon-pink);
  border-bottom-color: rgba(255, 0, 127, 0.2);
}

/* Next / Hold Preview Displays */
.preview-box {
  background: rgba(10, 5, 27, 0.8);
  border: 1px solid rgba(240, 237, 255, 0.1);
  aspect-ratio: 1;
  border-radius: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.preview-box canvas {
  width: 100%;
  height: 100%;
}

/* Stats Display in Panel */
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: 1.2rem;
}

.stat-item:last-child {
  margin-bottom: 0;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.3rem;
  letter-spacing: 1px;
}

.stat-value {
  font-family: 'Press Start 2P', monospace;
  font-size: 1.2rem;
  color: var(--neon-yellow);
  text-shadow: 0 0 5px rgba(255, 222, 0, 0.4);
}

/* Center Game Screen Area */
.game-board-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}

.canvas-wrapper {
  position: relative;
  background: rgba(5, 2, 15, 0.95);
  border: 4px solid var(--neon-pink);
  border-radius: 8px;
  box-shadow: 
    0 0 20px rgba(255, 0, 127, 0.3),
    inset 0 0 15px rgba(0, 0, 0, 0.9);
  padding: 5px;
  overflow: hidden;
}

#tetrisCanvas {
  display: block;
  background-color: transparent;
}

/* Game Info / State Overlay */
.game-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(10, 5, 27, 0.85);
  backdrop-filter: blur(4px);
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease-out;
}

.game-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.overlay-content {
  text-align: center;
  padding: 2rem;
  max-width: 300px;
}

.overlay-content h2 {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--neon-pink);
  text-shadow: 0 0 10px var(--neon-pink);
  margin-bottom: 1.5rem;
  letter-spacing: 2px;
}

.overlay-content .desc {
  margin-bottom: 2rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Control Guides */
.control-list {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.control-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.6rem;
  border-bottom: 1px dashed rgba(240, 237, 255, 0.05);
  padding-bottom: 0.4rem;
}

.control-key {
  font-family: 'Orbitron', sans-serif;
  background: rgba(240, 237, 255, 0.1);
  border: 1px solid rgba(240, 237, 255, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: #fff;
  font-size: 0.75rem;
}

/* Mobile Controls Overlay */
.mobile-controls {
  display: none;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 480px;
  margin-top: 1.5rem;
}

.mobile-btn {
  background: var(--glass-bg);
  border: 1px solid rgba(240, 237, 255, 0.15);
  color: var(--text-color);
  aspect-ratio: 1.2;
  border-radius: 8px;
  font-size: 1.2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.1s;
}

.mobile-btn:active {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--neon-cyan);
  color: var(--neon-cyan);
}

.mobile-btn.action-btn {
  border-color: rgba(255, 0, 127, 0.25);
}

.mobile-btn.action-btn:active {
  background: rgba(255, 0, 127, 0.2);
  border-color: var(--neon-pink);
  color: var(--neon-pink);
}

/* Footer Section */
footer {
  text-align: center;
  padding: 2rem;
  margin-top: auto;
  border-top: 1px solid rgba(240, 237, 255, 0.05);
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 1px;
}

/* Media Queries for Responsiveness */
@media (max-width: 992px) {
  .game-layout {
    grid-template-columns: 1fr 150px;
    grid-template-areas: 
      "board hold"
      "board next"
      "board stats"
      "board controls";
    max-width: 600px;
  }
  
  .game-board-container {
    grid-area: board;
  }
  
  .side-panel {
    padding: 1rem;
  }
  
  #panelHold { grid-area: hold; }
  #panelNext { grid-area: next; }
  #panelStats { grid-area: stats; }
  #panelControls { display: none; }
}

@media (max-width: 768px) {
  header {
    padding: 1rem;
  }
  
  .logo {
    font-size: 1.4rem;
  }
  
  .hub-hero h1 {
    font-size: 2.3rem;
  }
  
  .game-layout {
    grid-template-columns: 1fr;
    grid-template-areas: 
      "stats-strip"
      "board"
      "mobile-ctrls";
    max-width: 320px;
    gap: 1rem;
  }
  
  #panelHold, #panelNext, #panelControls {
    display: none;
  }
  
  #panelStats {
    grid-area: stats-strip;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 0;
  }
  
  #panelStats .panel-title {
    display: none;
  }
  
  #panelStats .stats-container {
    display: flex;
    justify-content: space-around;
    width: 100%;
  }
  
  #panelStats .stat-item {
    margin-bottom: 0;
  }
  
  #panelStats .stat-value {
    font-size: 1rem;
  }
  
  .mobile-controls {
    display: grid;
    grid-area: mobile-ctrls;
  }
}

/* Leaderboard (Bestenliste) Styles */
.leaderboard-list {
  margin-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 30px 1fr 65px;
  align-items: center;
  font-size: 0.9rem;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  background: rgba(10, 5, 27, 0.4);
  border: 1px solid rgba(240, 237, 255, 0.03);
}

.leaderboard-row.gold {
  color: var(--neon-yellow);
  text-shadow: 0 0 5px rgba(255, 222, 0, 0.4);
  font-weight: bold;
  border-color: rgba(255, 222, 0, 0.15);
  background: rgba(255, 222, 0, 0.04);
}

.leaderboard-row.silver {
  color: #e2e8f0;
  border-color: rgba(226, 232, 240, 0.1);
  background: rgba(226, 232, 240, 0.02);
}

.leaderboard-row.bronze {
  color: #d97706;
  border-color: rgba(217, 119, 6, 0.1);
  background: rgba(217, 119, 6, 0.02);
}

.leaderboard-rank {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.65rem;
}

.leaderboard-name {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.leaderboard-score {
  font-family: 'Press Start 2P', monospace;
  font-size: 0.7rem;
  text-align: right;
}

/* Highscore entry form (GameOver screen) */
.highscore-entry-form {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
}

.highscore-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.highscore-input {
  background: rgba(10, 5, 27, 0.9);
  border: 1px solid var(--neon-cyan);
  border-radius: 4px;
  color: #fff;
  padding: 0.5rem;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.2rem;
  font-weight: bold;
  text-transform: uppercase;
  text-align: center;
  width: 130px;
  letter-spacing: 4px;
  outline: none;
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
  transition: all 0.2s;
}

.highscore-input:focus {
  border-color: #fff;
  box-shadow: 0 0 18px var(--neon-cyan);
}

.highscore-input.pink {
  border-color: var(--neon-pink);
  box-shadow: 0 0 10px rgba(255, 0, 127, 0.2);
}

.highscore-input.pink:focus {
  border-color: #fff;
  box-shadow: 0 0 18px var(--neon-pink);
}

.highscore-input.orange {
  border-color: var(--neon-orange);
  box-shadow: 0 0 10px rgba(255, 85, 0, 0.2);
}

.highscore-input.orange:focus {
  border-color: #fff;
  box-shadow: 0 0 18px var(--neon-orange);
}

/* Mobile D-Pad controls for Snake */
.dpad-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 6px;
  width: 140px;
  height: 140px;
  margin: 1.5rem auto 0 auto;
}

.dpad-btn {
  background: var(--glass-bg);
  border: 1px solid rgba(0, 240, 255, 0.2);
  color: var(--neon-cyan);
  border-radius: 8px;
  font-size: 1.2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 0.1s;
}

.dpad-btn:active {
  background: rgba(0, 240, 255, 0.25);
  border-color: var(--neon-cyan);
  box-shadow: 0 0 12px var(--neon-cyan);
}

.dpad-empty {
  visibility: hidden;
}

@media (max-width: 768px) {
  .dpad-container {
    margin-top: 1rem;
    width: 120px;
    height: 120px;
  }
}