/**
 * Qubitchain Gateway - Styles
 * ゲーミング/NFT風のモダンなデザイン
 */

:root {
  --primary-color: #00ff88;
  --secondary-color: #ff0080;
  --accent-color: #00d4ff;
  --bg-dark: #0a0e27;
  --bg-card: #1a1f3a;
  --bg-card-hover: #252a4a;
  --text-primary: #ffffff;
  --text-secondary: #b0b8d4;
  --success: #00ff88;
  --error: #ff4757;
  --warning: #ffa502;
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image: 
    radial-gradient(ellipse at top, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at bottom, rgba(255, 0, 128, 0.1) 0%, transparent 50%);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Header */
header {
  text-align: center;
  padding: 3rem 0 2rem;
  position: relative;
}

.logo {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
  letter-spacing: -2px;
  text-shadow: 0 0 30px rgba(0, 255, 136, 0.3);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.2rem;
  font-weight: 300;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.5rem;
  opacity: 0.8;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--secondary-color));
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(0, 255, 136, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0, 255, 136, 0.1);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-icon {
  font-size: 1.8rem;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  color: var(--bg-dark);
  box-shadow: 0 4px 15px rgba(0, 255, 136, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover {
  background: #ff3447;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 71, 87, 0.3);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.05);
  padding: 1.5rem;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 255, 136, 0.3);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* API Keys */
.api-key-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.api-key-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(0, 255, 136, 0.2);
}

.api-key-text {
  font-family: 'Courier New', monospace;
  color: var(--primary-color);
  font-size: 0.9rem;
  word-break: break-all;
  flex: 1;
  margin-right: 1rem;
}

.api-key-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Input Groups */
.input-group {
  margin-bottom: 1.5rem;
}

.input-label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.input-field {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: 'Courier New', monospace;
  transition: var(--transition);
}

.input-field:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, 0.1);
}

/* Code Block */
.code-block {
  background: #000000;
  color: var(--primary-color);
  padding: 1.5rem;
  border-radius: 8px;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  overflow-x: auto;
  border: 1px solid rgba(0, 255, 136, 0.2);
  position: relative;
}

.code-block code {
  color: inherit;
}

/* Alerts */
.alert {
  padding: 1rem 1.5rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  border-left: 4px solid;
  animation: slideIn 0.3s ease-out;
}

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

.alert-success {
  background: rgba(0, 255, 136, 0.1);
  border-color: var(--success);
  color: var(--success);
}

.alert-error {
  background: rgba(255, 71, 87, 0.1);
  border-color: var(--error);
  color: var(--error);
}

.alert-warning {
  background: rgba(255, 165, 2, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

.alert-info {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 4rem;
  opacity: 0.3;
  margin-bottom: 1rem;
}

.empty-state-text {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 3rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  
  .logo {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .api-key-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  
  .api-key-actions {
    width: 100%;
  }
  
  .api-key-actions .btn {
    flex: 1;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.flex { display: flex; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-1 { gap: 1rem; }
.hidden { display: none; }