/* Background styling now applied globally to all sections except hero */
.how-it-works-section h2 {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}
.how-it-works-section h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--primary-gradient);
  border-radius: 2px;
}
.explanation-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 35px;
  margin-bottom: 50px;
  align-items: flex-start;
}
.fec-explanation-text {
  flex: 1.5;
  min-width: 320px;
  text-align: right;
  background: var(--card-background);
  padding: 30px;
  border-radius: 16px;
  border: 1.5px solid color-mix(in srgb, var(--primary-color) 15%, var(--border-color));
  box-shadow: 
    0 8px 24px rgba(0, 0, 0, 0.08),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 8%, transparent) inset;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.dark-mode .fec-explanation-text {
  background: color-mix(in srgb, var(--card-background) 98%, var(--primary-color));
  box-shadow: 
    0 8px 24px rgba(0, 0, 0, 0.2),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 12%, transparent) inset;
}
.fec-explanation-text::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.fec-explanation-text:hover::before {
  opacity: 1;
}
.fec-explanation-text:hover {
  border-color: color-mix(in srgb, var(--primary-color) 30%, var(--border-color));
  box-shadow: 
    0 12px 32px rgba(0, 0, 0, 0.12),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 15%, transparent) inset,
    0 0 24px color-mix(in srgb, var(--primary-color) 15%, transparent);
  transform: translateY(-2px);
}
.fec-explanation-text p {
  font-size: 1.05em;
  line-height: 1.9;
  color: color-mix(in srgb, var(--text-color) 85%, var(--background-color));
  margin-bottom: 15px;
  text-align: right;
}
.fec-explanation-text p:last-child {
  margin-bottom: 0;
}
.rtl-active .fec-explanation-text {
  text-align: right;
}
.fec-color-key-info {
  flex: 1;
  min-width: 280px;
  padding: 28px;
  background: linear-gradient(135deg,
    var(--card-background) 0%,
    color-mix(in srgb, var(--primary-color) 5%, var(--card-background)) 100%
  );
  border-radius: 16px;
  border: 1.5px solid color-mix(in srgb, var(--primary-color) 20%, var(--border-color));
  box-shadow: 
    0 8px 24px rgba(0, 0, 0, 0.08),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 10%, transparent) inset;
  transition: all 0.3s ease;
}
.dark-mode .fec-color-key-info {
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--card-background) 95%, var(--primary-color)) 0%,
    color-mix(in srgb, var(--primary-color) 8%, var(--card-background)) 100%
  );
  box-shadow: 
    0 8px 24px rgba(0, 0, 0, 0.2),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 15%, transparent) inset;
}
.fec-color-key-info:hover {
  border-color: color-mix(in srgb, var(--primary-color) 35%, var(--border-color));
  box-shadow: 
    0 12px 32px rgba(0, 0, 0, 0.12),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 20%, transparent) inset,
    0 0 24px color-mix(in srgb, var(--accent-color) 20%, transparent);
  transform: translateY(-2px);
}
.fec-color-key-info h3 {
  font-size: 1.3em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
  text-align: center;
}
.color-key {
  position: static;
  background-color: transparent;
  backdrop-filter: none;
  padding: 0;
  border: none;
  box-shadow: none;
  font-size: 0.95em;
  direction: ltr;
}
.color-key .key-item {
  display: flex;
  align-items: center;
  margin-bottom: 14px;
  padding: 12px 16px;
  background: var(--card-background);
  border-radius: 10px;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  cursor: pointer;
}
.dark-mode .color-key .key-item {
  background: color-mix(in srgb, var(--card-background) 95%, var(--primary-color));
  border-color: color-mix(in srgb, var(--border-color) 80%, var(--primary-color));
}
.color-key .key-item:last-child {
  margin-bottom: 0;
}
.color-key .key-item:hover {
  background: color-mix(in srgb, var(--primary-color) 5%, var(--card-background));
  border-color: var(--primary-color);
  transform: translateX(-4px);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-color) 15%, transparent);
}
.dark-mode .color-key .key-item:hover {
  background: color-mix(in srgb, var(--primary-color) 10%, var(--card-background));
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-color) 25%, transparent);
}
.color-key .key-color {
  display: inline-block;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  margin-right: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.color-key .key-item:hover .key-color {
  transform: scale(1.2);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}
.color-key .key-color.data {
  background-color: var(--primary-color);
  box-shadow: 0 0 12px color-mix(in srgb, var(--primary-color) 50%, transparent);
}
.color-key .key-color.parity {
  background-color: #f59e0b;
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.5);
}
.color-key .key-color.lost {
  background-color: #ef4444;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.5);
}
.color-key .key-color.recovered {
  background-color: var(--success-color);
  box-shadow: 0 0 12px color-mix(in srgb, var(--success-color) 50%, transparent);
}
.color-key .key-color.received {
  background-color: var(--primary-color);
  box-shadow: 0 0 12px color-mix(in srgb, var(--primary-color) 50%, transparent);
}
.color-key .key-item span:last-child {
  color: var(--text-color);
  font-weight: 600;
  font-size: 0.95em;
  flex-grow: 1;
}
.workflow-animation {
  margin-top: 50px;
  min-height: 400px;
  background: linear-gradient(135deg,
    var(--card-background) 0%,
    color-mix(in srgb, var(--primary-color) 3%, var(--card-background)) 50%,
    color-mix(in srgb, var(--primary-color) 3%, var(--card-background)) 100%
  );
  border-radius: 20px;
  border: 2px solid color-mix(in srgb, var(--primary-color) 20%, var(--border-color));
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.1),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 10%, transparent) inset,
    0 0 40px color-mix(in srgb, var(--primary-color) 8%, transparent);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 30px;
}
.dark-mode .workflow-animation {
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--card-background) 95%, var(--primary-color)) 0%,
    color-mix(in srgb, var(--primary-color) 5%, var(--card-background)) 50%,
    color-mix(in srgb, var(--primary-color) 5%, var(--card-background)) 100%
  );
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.3),
    0 0 0 1px color-mix(in srgb, var(--primary-color) 15%, transparent) inset,
    0 0 40px color-mix(in srgb, var(--primary-color) 15%, transparent);
}
.workflow-animation::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 200%;
  height: 100%;
  background: linear-gradient(90deg,
    transparent 0%,
    color-mix(in srgb, var(--primary-color) 5%, transparent) 50%,
    transparent 100%
  );
  animation: shimmer 8s linear infinite;
}
@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}
.workflow-animation::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  background-size: 200% 100%;
  animation: gradientSlide 4s linear infinite;
}
@keyframes gradientSlide {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}
.fec-metrics {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-bottom: 30px;
  flex-wrap: wrap;
  z-index: 10;
  position: relative;
}
.metric-card {
  background: var(--card-background);
  padding: 16px 24px;
  border-radius: 12px;
  border: 1.5px solid color-mix(in srgb, var(--primary-color) 20%, var(--border-color));
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  text-align: center;
  min-width: 140px;
  transition: all 0.3s ease;
}
.dark-mode .metric-card {
  background: color-mix(in srgb, var(--card-background) 95%, var(--primary-color));
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}
.metric-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: 0 6px 20px color-mix(in srgb, var(--primary-color) 20%, transparent);
}
.metric-label {
  font-size: 0.85em;
  color: color-mix(in srgb, var(--text-color) 70%, var(--background-color));
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.metric-value {
  font-size: 2em;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: 'Courier New', monospace;
  letter-spacing: 1px;
}
.metric-card.metric-lost .metric-value {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.metric-card.metric-recovered .metric-value {
  background: linear-gradient(135deg, var(--success-color), #059669);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.animation-controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 25px;
  z-index: 10;
  position: relative;
}
.control-btn {
  background: var(--primary-gradient);
  border: none;
  color: white;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.9em;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary-color) 30%, transparent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.control-btn:hover {
  background: var(--primary-gradient);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--primary-color) 40%, transparent);
  transform: translateY(-2px);
}
.control-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--primary-color) 30%, transparent);
}
.control-btn i {
  font-size: 1.1em;
}
.control-btn.secondary {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent-color) 30%, transparent);
}
.control-btn.secondary:hover {
  background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent-color) 40%, transparent);
}
.packet-container {
  width: 100%;
  max-width: 800px;
  height: 200px;
  position: relative;
  z-index: 5;
}
.packet {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  position: absolute;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7em;
  color: white;
  font-weight: 700;
}
.packet.data {
  background: var(--primary-gradient);
  box-shadow: 0 0 16px color-mix(in srgb, var(--primary-color) 60%, transparent);
}
.packet.parity {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.6);
}
.packet.lost-placeholder {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  opacity: 0.3;
  box-shadow: none;
  border: 2px dashed #ef4444;
}
.packet.recovered {
  background: linear-gradient(135deg, var(--success-color), #059669);
  box-shadow: 0 0 20px color-mix(in srgb, var(--success-color) 70%, transparent);
  animation: recoveryPulse 0.8s ease-out;
}
.packet.received {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  box-shadow: 0 0 16px color-mix(in srgb, var(--primary-color) 60%, transparent);
}
@keyframes recoveryPulse {
  0% { transform: scale(0.5); opacity: 0; }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); opacity: 1; }
}
.packet.animating {
  animation: packetMove 2s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes packetMove {
  0% { transform: translateX(0); }
  100% { transform: translateX(600px); }
}
@media (max-width: 768px) {
  .explanation-layout {
    flex-direction: column;
    gap: 25px;
  }
  .fec-explanation-text,
  .fec-color-key-info {
    flex: 1 1 100%;
    min-width: 100%;
  }
  .workflow-animation {
    min-height: 350px;
    padding: 30px 20px;
  }
  .fec-metrics {
    gap: 15px;
  }
  .metric-card {
    min-width: 120px;
    padding: 12px 18px;
  }
  .metric-value {
    font-size: 1.7em;
  }
  .animation-controls {
    flex-wrap: wrap;
    gap: 10px;
  }
  .control-btn {
    padding: 8px 16px;
    font-size: 0.85em;
  }
  .packet-container {
    height: 180px;
  }
  .packet {
    width: 20px;
    height: 20px;
  }
}
@media (max-width: 480px) {
  .fec-metrics {
    flex-direction: column;
    align-items: stretch;
  }
  .metric-card {
    width: 100%;
  }
  .workflow-animation {
    min-height: 320px;
  }
  .packet-container {
    height: 160px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .workflow-animation::before,
  .workflow-animation::after,
  .packet.animating,
  .packet.recovered {
    animation: none !important;
  }
  .packet,
  .metric-card,
  .control-btn,
  .color-key .key-item {
    transition-duration: 0.01ms !important;
  }
}
.control-btn:focus-visible {
  outline: 3px solid var(--primary-color);
  outline-offset: 3px;
}
.color-key .key-item:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}