/* Main wrapper */
.oauth-evolution-wrapper {
  border-radius: 1rem;
  padding: 2rem 1.5rem;
  margin: 2rem 0;
  background: var(--md-code-bg-color);
  position: relative;
  overflow: hidden;
}

/* Navigation container */
.oauth-evolution-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  margin-bottom: 1rem;
  position: relative;
}

/* Navigation arrows */
.oauth-nav-arrow {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  color: var(--md-primary-fg-color);
  font-size: 1.5rem;
  flex-shrink: 0;
  position: relative;
}

.oauth-nav-arrow:hover {
  background: var(--md-primary-fg-color);
  color: var(--md-primary-bg-color);
  transform: scale(1.1);
}

.oauth-nav-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  transform: scale(1);
}

/* Security level labels for navigation arrows */
.oauth-nav-arrow:first-of-type::after {
  content: 'Less Secure';
  position: absolute;
  top: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  white-space: nowrap;
  color: #dc2626;
  font-weight: 600;
  opacity: 0.8;
}

.oauth-nav-arrow:last-of-type::after {
  content: 'More Secure';
  position: absolute;
  top: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  white-space: nowrap;
  color: #16a34a;
  font-weight: 600;
  opacity: 0.8;
}

/* Timeline container */
.oauth-evolution-timeline {
  display: flex;
  align-items: center;
  position: relative;
  flex: 1;
  max-width: 800px;
}

/* Timeline line */
.oauth-timeline-line {
  position: absolute;
  top: 50%;
  left: 0.5rem;
  right: 0.5rem;
  height: 2px;
  background: var(--md-default-fg-color--lightest);
  z-index: 0;
}

/* Timeline progress line */
.oauth-timeline-progress {
  position: absolute;
  top: 50%;
  left: 0.5rem;
  height: 2px;
  background: var(--md-primary-fg-color);
  z-index: 1;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Timeline steps container */
.oauth-timeline-steps {
  display: flex;
  justify-content: space-between;
  width: 100%;
  position: relative;
  z-index: 2;
  padding: 0 0.5rem;
}

/* Individual timeline step */
.oauth-timeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  position: relative;
}

/* Give MORE space between all three deprecated flows with long labels */
.oauth-timeline-step:nth-child(1),
.oauth-timeline-step:nth-child(2),
.oauth-timeline-step:nth-child(3) {
  margin-right: 2.5rem;
}

.oauth-timeline-step.active {
  z-index: 10;
}

/* Timeline dot */
.oauth-timeline-dot {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: #d1d5db;
  border: 3px solid var(--md-default-bg-color);
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 600;
  color: #374151;
  box-shadow: 0 0 0 2px var(--md-default-bg-color);
}

.oauth-timeline-step:hover .oauth-timeline-dot {
  transform: scale(1.3);
}

.oauth-timeline-step.active .oauth-timeline-dot {
  width: 2rem;
  height: 2rem;
  background: #3b82f6;
  color: white;
  font-size: 0.85rem;
  z-index: 5;
}

.oauth-timeline-step.completed .oauth-timeline-dot {
  background: #3b82f6;
  color: white;
}

/* Deprecated flows (first 3) */
.oauth-timeline-step.deprecated .oauth-timeline-dot {
  background: repeating-linear-gradient(
    45deg,
    #dc2626,
    #dc2626 10px,
    #ef4444 10px,
    #ef4444 20px
  );
  color: white;
  opacity: 1;
  border: 3px solid var(--md-default-bg-color);
  box-shadow: 0 0 0 2px var(--md-default-bg-color);
}

.oauth-timeline-step.deprecated .oauth-timeline-label {
  text-decoration: line-through;
  opacity: 0.7;
}

.oauth-timeline-step.deprecated.active .oauth-timeline-dot {
  opacity: 1;
}

/* Timeline label */
.oauth-timeline-label {
  position: absolute;
  top: 2rem;
  font-size: 0.6rem;
  white-space: nowrap;
  color: var(--md-default-fg-color--light);
  transition: all 0.3s ease;
  text-align: center;
  background: var(--md-code-bg-color);
  padding: 0.2rem 0.4rem;
  border-radius: 0.2rem;
  z-index: 4;
}

.oauth-timeline-step.active .oauth-timeline-label {
  color: #3b82f6;
  font-weight: 600;
  z-index: 11;
}

/* Timeline full title - hidden in timeline, shown in dedicated area */
.oauth-timeline-full-title {
  display: none;
}

/* Content area with animation */
.oauth-evolution-content {
  margin-top: 0.5rem;
  min-height: 150px;
  opacity: 1;
  transition: opacity 0.3s ease;
  display: flex;
  flex-direction: column;
}

.oauth-evolution-content.transitioning {
  opacity: 0;
}

/* Flow title - Always visible, centered with background */
.oauth-flow-title {
  display: block;
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: #3b82f6;
  background: rgba(59, 130, 246, 0.1);
  border: 2px solid #3b82f6;
  border-radius: 0.25rem;
  padding: 0.3rem 0.8rem;
  margin: 0 auto 0.5rem auto;
  width: fit-content;
  max-width: 90%;
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
  order: 0;
  align-self: center;
}

/* Comparison badge - HIDDEN */
.oauth-comparison {
  display: none;
}

/* Sequence Diagram Container */
.oauth-sequence-diagram {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 0.5rem;
  position: relative;
  padding: 0.5rem 0.5rem;
  min-height: 150px;
  max-width: 100%;
  overflow-x: visible;
  order: 1;
}

/* Actors row */
.oauth-actors {
  display: flex;
  justify-content: space-around;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 3;
}

.oauth-actor {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
  flex: 1;
}

/* Adjust spacing for BFF flow (4 actors) - Browser smaller, BFF and Auth Server moved right */
.oauth-actors .oauth-actor:first-child:nth-last-child(4) {
  flex: 0.8;
}

.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(2) {
  flex: 1.1;
}

.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(3),
.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(4) {
  flex: 1.05;
}

/* Extra breathing room between Browser and BFF/Auth Server in 4-actor layout */
.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor {
  margin-left: 0;
}

.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(2) {
  margin-left: 15%;
}

.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(3) {
  margin-left: 7%;
}

.oauth-actors .oauth-actor:first-child:nth-last-child(4) ~ .oauth-actor:nth-child(4) {
  margin-left: 5%;
}

.oauth-actor-box {
  min-width: 70px;
  padding: 0.4rem 0.6rem;
  background: linear-gradient(135deg, var(--md-primary-fg-color), var(--md-accent-fg-color));
  color: white;
  border-radius: 0.3rem;
  font-weight: 600;
  font-size: 0.65rem;
  text-align: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  position: relative;
  z-index: 3;
}

/* Lifelines - vertical dashed lines extending to bottom */
.oauth-lifeline {
  position: absolute;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--md-default-fg-color--lighter) 0,
    var(--md-default-fg-color--lighter) 4px,
    transparent 4px,
    transparent 8px
  );
  top: 2.5rem;
  height: 100px; /* Will be set dynamically by JavaScript */
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

/* Interactions container */
.oauth-interactions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  margin-top: 0.5rem;
  padding-bottom: 0.5rem;
  padding-left: 0;
  margin-left: 0;
  z-index: 2;
}

/* Single interaction */
.oauth-interaction {
  display: flex;
  align-items: center;
  position: relative;
  min-height: 2rem;
}

/* Step number badge - HIDDEN */
.oauth-step-number {
  display: none;
}

/* Arrow between actors */
.oauth-arrow {
  position: absolute;
  height: 2px;
  background: var(--md-default-fg-color);
  display: flex;
  align-items: center;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
}

.oauth-arrow::after {
  content: '▶';
  position: absolute;
  right: -6px;
  font-size: 0.8rem;
  color: var(--md-default-fg-color);
}

.oauth-arrow.reverse {
  height: 2px;
}

.oauth-arrow.reverse::after {
  content: '◀';
  left: -6px;
  right: auto;
}

/* Arrow label */
.oauth-arrow-label {
  position: absolute;
  top: -1.3rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--md-code-bg-color);
  padding: 0.2rem 0.5rem;
  border-radius: 0.2rem;
  font-size: 0.6rem;
  white-space: nowrap;
  color: var(--md-default-fg-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  z-index: 15;
  border: 1px solid var(--md-default-fg-color--lightest);
}

/* Highlight box for security-critical step */
.oauth-interaction.highlight .oauth-arrow {
  background: #ef4444;
  height: 3px;
}

.oauth-interaction.highlight .oauth-arrow::after {
  color: #ef4444;
  font-size: 1rem;
}

.oauth-interaction.highlight .oauth-arrow-label {
  background: #fef2f2;
  color: #dc2626;
  font-weight: 700;
  border-color: #ef4444;
}

/* Improvement highlight */
.oauth-interaction.improvement .oauth-arrow {
  background: #22c55e;
  height: 3px;
}

.oauth-interaction.improvement .oauth-arrow::after {
  color: #22c55e;
  font-size: 1rem;
}

.oauth-interaction.improvement .oauth-arrow-label {
  background: #f0fdf4;
  color: #16a34a;
  font-weight: 700;
  border-color: #22c55e;
}

/* Fixed issue indicator */
.oauth-interaction.fixed .oauth-arrow {
  background: #22c55e;
  height: 3px;
}

.oauth-interaction.fixed .oauth-arrow::after {
  color: #22c55e;
  font-size: 1rem;
}

.oauth-interaction.fixed .oauth-arrow-label {
  background: #f0fdf4;
  color: #16a34a;
  font-weight: 700;
  border-color: #22c55e;
}

.oauth-interaction.fixed .oauth-arrow-label::before {
  content: '✓ Fixed: ';
  font-weight: 900;
}

/* Warning note inside diagram */
.oauth-warning-note {
  position: relative;
  right: auto;
  top: auto;
  transform: none;
  width: 100%;
  max-width: 100%;
  margin-top: 0.8rem;
  left: 0;
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(239, 68, 68, 0.05));
  border: 2px solid #ef4444;
  border-radius: 0.3rem;
  padding: 0.5rem;
  font-size: 0.6rem;
  line-height: 1.3;
  color: var(--md-default-fg-color);
  box-shadow: 0 2px 6px rgba(239, 68, 68, 0.2);
  z-index: 4;
}

.oauth-warning-note::before {
  content: '⚠️';
  display: block;
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.oauth-warning-note-title {
  font-weight: 700;
  color: #dc2626;
  margin-bottom: 0.15rem;
  font-size: 0.62rem;
}

/* Fixed note inside diagram */
.oauth-fixed-note {
  position: relative;
  right: auto;
  top: auto;
  transform: none;
  width: 100%;
  max-width: 100%;
  margin-top: 0.8rem;
  left: 0;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.15), rgba(34, 197, 94, 0.05));
  border: 2px solid #22c55e;
  border-radius: 0.3rem;
  padding: 0.5rem;
  font-size: 0.6rem;
  line-height: 1.3;
  color: var(--md-default-fg-color);
  box-shadow: 0 2px 6px rgba(34, 197, 94, 0.2);
  z-index: 4;
}

.oauth-fixed-note::before {
  content: '✓';
  display: block;
  font-size: 1rem;
  margin-bottom: 0.2rem;
  color: #22c55e;
  font-weight: 900;
}

.oauth-fixed-note-title {
  font-weight: 700;
  color: #16a34a;
  margin-bottom: 0.15rem;
  font-size: 0.62rem;
}

/* Key improvement section - HIDDEN */
.oauth-key-improvement {
  display: none;
}

.oauth-key-improvement-title {
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: #16a34a;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.oauth-key-improvement-title::before {
  content: '🔒';
  font-size: 0.9rem;
}

.oauth-key-improvement-text {
  font-size: 0.7rem;
  line-height: 1.4;
  color: var(--md-default-fg-color);
}

/* Responsive design - notes are already below by default, no media query needed for position change */

@media (max-width: 768px) {
  .oauth-evolution-wrapper {
    padding: 1rem 0.5rem;
  }

  .oauth-sequence-diagram {
    padding: 0.5rem 0.25rem;
  }

  .oauth-interactions {
    padding-left: 0;
    margin-left: 0;
    gap: 0.6rem;
  }

  .oauth-actor-box {
    min-width: 60px;
    padding: 0.4rem 0.6rem;
    font-size: 0.7rem;
  }

  .oauth-arrow-label {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
  }

  .oauth-flow-title {
    font-size: 1.1rem;
  }

  .oauth-key-improvement {
    padding: 0.5rem;
    margin-top: 0.6rem;
  }

  .oauth-key-improvement-title {
    font-size: 0.7rem;
    margin-bottom: 0.3rem;
  }

  .oauth-key-improvement-title::before {
    font-size: 0.8rem;
  }

  .oauth-key-improvement-text {
    font-size: 0.65rem;
  }

  .oauth-step-number {
    width: 1.2rem;
    height: 1.2rem;
    font-size: 0.65rem;
    left: -2.25rem;
  }

  .oauth-timeline-dot {
    width: 1.2rem;
    height: 1.2rem;
    font-size: 0.65rem;
  }

  .oauth-timeline-step.active .oauth-timeline-dot {
    width: 1.6rem;
    height: 1.6rem;
    font-size: 0.75rem;
  }
}

/* Animation keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drawLifeline {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.oauth-actors {
  animation: fadeInUp 0.5s ease forwards;
}

.oauth-lifeline {
  animation: drawLifeline 0.8s ease forwards;
  opacity: 0;
}

.oauth-interaction {
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
}

.oauth-interaction:nth-child(1) { animation-delay: 0.2s; }
.oauth-interaction:nth-child(2) { animation-delay: 0.35s; }
.oauth-interaction:nth-child(3) { animation-delay: 0.5s; }
.oauth-interaction:nth-child(4) { animation-delay: 0.65s; }
.oauth-interaction:nth-child(5) { animation-delay: 0.8s; }
.oauth-interaction:nth-child(6) { animation-delay: 0.95s; }

.oauth-key-improvement {
  animation: fadeInUp 0.5s ease 1.1s forwards;
  opacity: 0;
}

.oauth-warning-note,
.oauth-fixed-note {
  animation: fadeInUp 0.4s ease forwards;
  opacity: 0;
}