:root {
  --font-cyber: 'Share Tech Mono', monospace;
  --font-main: 'Outfit', 'Noto Sans JP', sans-serif;
  
  --bg-dark: #070913;
  --panel-bg: rgba(13, 17, 39, 0.6);
  --border-color: rgba(0, 242, 254, 0.15);
  
  --color-disabled: #64748b;
  
  /* Ryusei 1 */
  --accent-r1: #10b981;
  --glow-r1: rgba(16, 185, 129, 0.25);
  
  /* Ryusei 2 */
  --accent-r2: #00f2fe;
  --accent-r2-secondary: #ff7e5f;
  --glow-r2: rgba(0, 242, 254, 0.25);
  
  /* Ryusei 3 */
  --accent-r3: #ef4444;
  --accent-r3-secondary: #a855f7;
  --glow-r3: rgba(239, 68, 68, 0.25);
  
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  justify-content: center;
  position: relative;
}

/* Animated Cyber Grid Background */
.cyber-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background: radial-gradient(circle at 50% 50%, #0d122b 0%, #05070f 100%);
  overflow: hidden;
}

.grid-lines {
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background-image: 
    linear-gradient(rgba(0, 242, 254, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 242, 254, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  transform: perspective(500px) rotateX(60deg);
  animation: gridMove 25s linear infinite;
}

@keyframes gridMove {
  0% {
    transform: perspective(500px) rotateX(60deg) translateY(0);
  }
  100% {
    transform: perspective(500px) rotateX(60deg) translateY(50px);
  }
}

/* Container */
.portal-container {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  width: 90%;
  margin: 40px auto;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 80px);
  justify-content: space-between;
}

/* Header */
.portal-header {
  text-align: center;
  margin-bottom: 50px;
}

.logo-area {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

.logo-symbol {
  font-size: 2.5rem;
  color: var(--accent-r2);
  text-shadow: 0 0 15px var(--accent-r2);
  animation: pulse 1.5s infinite alternate;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  100% { transform: scale(1.05); opacity: 1; }
}

.portal-header h1 {
  font-family: var(--font-cyber);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: 4px;
  background: linear-gradient(90deg, #fff 30%, var(--accent-r2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-family: var(--font-cyber);
  color: var(--text-muted);
  font-size: 0.95rem;
  letter-spacing: 3px;
  margin-top: 10px;
}

/* Portal Grid */
.portal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

/* Game Card General */
.game-card {
  position: relative;
  text-decoration: none;
  color: inherit;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 30px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  height: 380px;
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 1;
}

.card-inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Tags & Icons */
.version-tag {
  align-self: flex-start;
  font-family: var(--font-cyber);
  font-size: 0.75rem;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 15px;
}

.game-icon {
  font-size: 3rem;
  margin-bottom: 15px;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.1));
}

.game-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  transition: color 0.3s ease;
}

.game-desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: auto;
}

/* Progress bar inside card */
.progress-section {
  margin-top: 25px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-cyber);
  margin-bottom: 8px;
}

.progress-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.progress-pct {
  font-size: 1.1rem;
  font-weight: 600;
}

.progress-bar-bg {
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  transition: width 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.progress-stats {
  font-family: var(--font-cyber);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

/* Ryusei 1 Theme */
.game-card.ryusei1 {
  border-color: rgba(16, 185, 129, 0.2);
}
.game-card.ryusei1:hover {
  transform: translateY(-8px);
  border-color: var(--accent-r1);
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
}
.game-card.ryusei1 .version-tag {
  color: var(--accent-r1);
  border-color: rgba(16, 185, 129, 0.2);
  background: rgba(16, 185, 129, 0.05);
}
.game-card.ryusei1 .progress-bar-fill {
  background: linear-gradient(90deg, var(--accent-r1), #00d2ff);
}
.game-card.ryusei1 .progress-pct {
  color: var(--accent-r1);
}
.game-card.ryusei1 .card-glow {
  background: radial-gradient(800px circle at 50% 50%, var(--glow-r1), transparent 40%);
}
.game-card.ryusei1:hover .card-glow {
  opacity: 1;
}
.game-card.ryusei1:hover h2 {
  color: var(--accent-r1);
}

/* Ryusei 2 Theme */
.game-card.ryusei2 {
  border-color: rgba(0, 242, 254, 0.2);
}
.game-card.ryusei2:hover {
  transform: translateY(-8px);
  border-color: var(--accent-r2);
  box-shadow: 0 10px 30px rgba(0, 242, 254, 0.15);
}
.game-card.ryusei2 .version-tag {
  color: var(--accent-r2);
  border-color: rgba(0, 242, 254, 0.2);
  background: rgba(0, 242, 254, 0.05);
}
.game-card.ryusei2 .progress-bar-fill {
  background: linear-gradient(90deg, var(--accent-r2), var(--accent-r2-secondary));
}
.game-card.ryusei2 .progress-pct {
  color: var(--accent-r2);
}
.game-card.ryusei2 .card-glow {
  background: radial-gradient(800px circle at 50% 50%, var(--glow-r2), transparent 40%);
}
.game-card.ryusei2:hover .card-glow {
  opacity: 1;
}
.game-card.ryusei2:hover h2 {
  color: var(--accent-r2);
}

/* Ryusei 3 Theme */
.game-card.ryusei3 {
  border-color: rgba(239, 68, 68, 0.2);
}
.game-card.ryusei3:hover {
  transform: translateY(-8px);
  border-color: var(--accent-r3);
  box-shadow: 0 10px 30px rgba(239, 68, 68, 0.15);
}
.game-card.ryusei3 .version-tag {
  color: var(--accent-r3-secondary);
  border-color: rgba(239, 68, 68, 0.2);
  background: rgba(239, 68, 68, 0.05);
}
.game-card.ryusei3 .progress-bar-fill {
  background: linear-gradient(90deg, var(--accent-r3), var(--accent-r3-secondary));
}
.game-card.ryusei3 .progress-pct {
  color: var(--accent-r3-secondary);
}
.game-card.ryusei3 .card-glow {
  background: radial-gradient(800px circle at 50% 50%, var(--glow-r3), transparent 40%);
}
.game-card.ryusei3:hover .card-glow {
  opacity: 1;
}
.game-card.ryusei3:hover h2 {
  color: var(--accent-r3-secondary);
}

/* Disabled state styling */
.game-card.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  filter: grayscale(80%);
}

/* Footer */
.portal-footer {
  text-align: center;
  font-family: var(--font-cyber);
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .portal-header h1 {
    font-size: 1.8rem;
  }
  .portal-grid {
    grid-template-columns: 1fr;
  }
  .game-card {
    height: 350px;
  }
}