/* CSS Variables for Theme System */
:root {
  /* Light Mode Colors */
  --primary-main: #1976d2;
  --primary-light: #42a5f5;
  --primary-dark: #1565c0;
  --secondary-main: #9c27b0;
  --secondary-light: #ba68c8;
  --secondary-dark: #7b1fa2;
  --background-default: #f5f5f5;
  --background-paper: #ffffff;
  --surface-main: #ffffff;
  --surface-dark: #f5f5f5;
  --text-primary: #212121;
  --text-secondary: #666666;
  --success-main: #00e676;
  --warning-main: #ff9800;
  --error-main: #f44336;
  --border-color: rgba(0, 0, 0, 0.05);
  --shadow-color: rgba(0, 0, 0, 0.1);
  --card-hover-shadow: rgba(0, 0, 0, 0.15);
}

/* Dark Mode Colors */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-main: #00d4ff;
    --primary-light: #33dcff;
    --primary-dark: #0099cc;
    --secondary-main: #bb86fc;
    --secondary-light: #c998ff;
    --secondary-dark: #8254c9;
    --background-default: #0a0a0a;
    --background-paper: #1a1a1a;
    --surface-main: #262626;
    --surface-dark: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 212, 255, 0.1);
    --card-hover-shadow: rgba(0, 212, 255, 0.2);
  }
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", "Roboto", "Helvetica", "Arial", sans-serif;
  background: var(--background-default);
  background-image: radial-gradient(
      circle at 25% 25%,
      var(--primary-main) 20 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 75% 75%,
      var(--secondary-main) 20 0%,
      transparent 50%
    );
  min-height: 100vh;
  color: var(--text-primary);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  flex: 1;
}

/* Header styles */
.header {
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    135deg,
    var(--primary-main),
    var(--secondary-main)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

.header p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  opacity: 0.9;
}

/* Grid layout */
.dapps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

/* dApp card styles - Material UI Card inspired */
.dapp-card {
  background: var(--surface-main);
  background-image: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.05) 100%
  );
  border-radius: 16px;
  padding: 2rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1), 0 1px 4px rgba(0, 0, 0, 0.05);
}

.dapp-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--primary-main),
    var(--secondary-main)
  );
  transform: scaleX(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 16px 16px 0 0;
}

.dapp-card:hover::before {
  transform: scaleX(1);
}

.dapp-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px var(--card-hover-shadow),
    0 8px 16px rgba(0, 0, 0, 0.1);
}

/* dApp card content */
.dapp-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: #ffffff;
  background: linear-gradient(
    135deg,
    var(--primary-main),
    var(--secondary-main)
  );
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dapp-card:hover .dapp-icon {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.dapp-title {
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.dapp-description {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
}

.dapp-category {
  display: inline-block;
  background: linear-gradient(
    135deg,
    rgba(25, 118, 210, 0.1),
    rgba(156, 39, 176, 0.1)
  );
  color: var(--primary-main);
  padding: 0.5rem 1rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: 1px solid rgba(25, 118, 210, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dapp-card:hover .dapp-category {
  background: var(--primary-main);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
}

/* Add button - Material UI FAB inspired */
.add-dapp-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  background: linear-gradient(
    135deg,
    var(--primary-main),
    var(--secondary-main)
  );
  border: none;
  border-radius: 50%;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3), 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.add-dapp-btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 24px rgba(25, 118, 210, 0.4), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.add-dapp-btn:active {
  transform: translateY(0) scale(0.98);
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  top: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--surface-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  z-index: 999;
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.pulse {
  animation: pulse 2s infinite;
}

/* Loading state */
.loading {
  opacity: 0.7;
  pointer-events: none;
}

.loading .dapp-icon {
  animation: pulse 1.5s infinite;
}

/* Responsive design */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .header h1 {
    font-size: 2rem;
  }

  .header p {
    font-size: 0.875rem;
  }

  .dapps-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .dapp-card {
    padding: 1.5rem;
  }

  .add-dapp-btn {
    bottom: 1rem;
    right: 1rem;
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }

  .theme-toggle {
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.75rem;
  }

  .dapp-card {
    padding: 1.25rem;
  }

  .dapp-title {
    font-size: 1.25rem;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .dapp-card {
    border-width: 2px;
  }

  .dapp-category {
    border-width: 2px;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Footer styles */
.footer {
  margin-top: 4rem;
  padding: 2rem 0;
  color: var(--text-primary); /* ← adapt to theme */
  text-align: center;
  position: relative;
}

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

.powered-by {
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
  opacity: 0.9;
  font-weight: 400;
}

.company-name {
  font-size: 1.75rem;
  font-weight: 300;
  font-style: italic;
  margin-bottom: 0.5rem;
  letter-spacing: 0.5px;
}

.copyright {
  font-size: 0.75rem;
  opacity: 0.8;
  font-weight: 400;
  margin: 0;
}

/* Responsive footer */
@media (max-width: 768px) {
  .footer {
    margin-top: 3rem;
    padding: 1.5rem 0;
  }

  .footer-content {
    padding: 0 1rem;
  }

  .company-name {
    font-size: 1.5rem;
  }

  .powered-by {
    font-size: 0.8125rem;
  }

  .copyright {
    font-size: 0.6875rem;
  }
}