/* ==========================================
   Robotics Simulation Dashboard Styles
   Author: Arihant M. Appannavar
   ========================================== */

/* Design Tokens & Theme Variables */
:root {
  --primary: #00f0ff;      /* Electric Cyan */
  --primary-glow: rgba(0, 240, 255, 0.15);
  --accent: #bd00ff;       /* Pulse Purple */
  --success: #39ff14;      /* Matrix Green */
  --warning: #ffb700;      /* Safety Yellow */
  --danger: #ff3b30;       /* Failsafe Red */
  
  --bg-darker: #0a0a0c;
  --bg-dark: #121216;
  --bg-card: rgba(22, 22, 28, 0.65);
  --bg-sidebar: rgba(13, 13, 17, 0.85);
  --border-glow: rgba(255, 255, 255, 0.08);
  --border-active: rgba(0, 240, 255, 0.3);
  
  --text-main: #f0f4f8;
  --text-muted: #8e9bb0;
  --text-dark: #070709;
}

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

body {
  background-color: var(--bg-darker);
  color: var(--text-main);
  font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  overflow-x: hidden;
  height: 100vh;
}

/* Navigation Integration */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(13, 13, 17, 0.9) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  z-index: 1000;
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  height: 72px;
}

.nav-container {
  max-width: 1500px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2.5rem;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary) !important;
  font-family: 'Outfit', sans-serif;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--primary), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a:hover, .nav-links a.active {
  color: var(--primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -6px;
  left: 0;
  background-color: var(--primary);
  transition: width 0.3s ease;
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

/* Glassmorphism Panel Container */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.glass-panel-hover:hover {
  border-color: var(--border-active);
  box-shadow: 0 8px 32px 0 var(--primary-glow);
  transform: translateY(-2px);
}

/* Dashboard Page Grid Layout */
.app-container {
  display: grid;
  grid-template-columns: 290px 1fr;
  height: calc(100vh - 72px);
  margin-top: 72px;
  background-color: var(--bg-darker);
  overflow: hidden;
}

/* Sidebar Navigation Panel */
aside {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-glow);
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  gap: 2rem;
  overflow-y: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo svg {
  width: 20px;
  height: 20px;
  fill: #fff;
}

.brand-name {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, #fff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Developer Mini Card */
.developer-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.8rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.dev-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dev-avatar svg {
  width: 20px;
  height: 20px;
  fill: var(--primary);
}

.dev-info {
  display: flex;
  flex-direction: column;
}

.dev-role {
  font-size: 0.8rem;
  font-weight: 600;
  color: #fff;
}

.dev-location {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 4px;
}

.nav-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  transition: all 0.2s ease;
  font-family: inherit;
}

.nav-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.03);
  color: #fff;
}

.nav-btn.active {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: rgba(0, 240, 255, 0.15);
}

.sidebar-footer {
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1rem;
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--success);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.6; }
}

/* Main Content Workspace */
main {
  flex: 1;
  overflow-y: auto;
  padding: 2.2rem;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.page-view {
  display: none;
  flex-direction: column;
  gap: 2rem;
  animation: fadeIn 0.4s ease-out forwards;
}

.page-view.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Content Header Block */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1.5rem;
}

.header-title h1,
.header-title h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.header-title p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.search-bar {
  position: relative;
  width: 320px;
}

.search-bar svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 2.5;
}

.search-bar input {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glow);
  padding: 10px 14px 10px 42px;
  border-radius: 8px;
  color: #fff;
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.search-bar input:focus {
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 0 10px var(--primary-glow);
  outline: none;
}

/* Stats Counter strip */
.stats-counter-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.stat-item {
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
}

.stat-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: 'Space Grotesk', monospace;
}

.stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
  font-weight: 600;
}

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.stat-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

/* Split Repository Grid & Reference Panel */
.repository-split-view {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
}

/* Videos List Grid */
.videos-grid-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.section-subtitle {
  font-size: 1.15rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-subtitle::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}

.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.5rem;
}

.video-card {
  cursor: pointer;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.video-thumbnail-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  background-color: #000;
  overflow: hidden;
}

.video-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.video-card:hover .video-thumbnail {
  transform: scale(1.05) rotate(0.5deg);
}

.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(10, 10, 12, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 4px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 4px;
  backdrop-filter: blur(4px);
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  padding: 3px 6px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 4px;
  font-family: monospace;
}

.play-hover-btn {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
}

.play-hover-btn svg {
  width: 48px;
  height: 48px;
  fill: var(--primary);
  filter: drop-shadow(0 0 10px var(--primary));
  transform: scale(0.8);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.video-card:hover .play-hover-btn {
  opacity: 1;
}

.video-card:hover .play-hover-btn svg {
  transform: scale(1);
}

.video-info {
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.video-meta {
  display: flex;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.video-title {
  font-size: 1.05rem;
  font-weight: 650;
  line-height: 1.35;
  color: #fff;
}

.video-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: auto;
}

.video-tech-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.tech-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-family: monospace;
}

/* Reference Files Panel */
.reference-panel {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.reference-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reference-item {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.reference-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ref-title {
  font-size: 0.85rem;
  font-weight: 600;
  font-family: monospace;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.ref-status-tag {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.ref-status-tag.success {
  background: rgba(57, 255, 20, 0.1);
  color: var(--success);
  border: 1px solid rgba(57, 255, 20, 0.2);
}

.ref-status-tag.warning {
  background: rgba(255, 183, 0, 0.1);
  color: var(--warning);
  border: 1px solid rgba(255, 183, 0, 0.2);
}

.ref-status-tag.fail {
  background: rgba(255, 59, 48, 0.15);
  color: var(--danger);
  border: 1px solid rgba(255, 59, 48, 0.25);
}

.ref-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* TAB 2: Side-by-Side Compare Layout */
.compare-workspace {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  height: 100%;
}

.compare-selectors {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 1rem;
  align-items: center;
}

.selector-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.selector-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
}

.compare-select {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  padding: 10px 14px;
  border-radius: 8px;
  color: #fff;
  font-family: inherit;
  cursor: pointer;
}

.compare-select:focus {
  border-color: var(--primary);
  outline: none;
}

.sync-toggle-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glow);
  color: var(--text-muted);
  padding: 10px 18px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  align-self: flex-end;
  transition: all 0.2s ease;
}

.sync-toggle-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.sync-toggle-btn.active {
  background: var(--primary-glow);
  color: var(--primary);
  border-color: rgba(0, 240, 255, 0.25);
}

.compare-viewports {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  flex: 1;
}

.viewport-panel {
  display: flex;
  flex-direction: column;
}

.viewport-header {
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.viewport-title {
  color: #fff;
  font-family: monospace;
}

.viewport-video-wrapper {
  background: #000;
  aspect-ratio: 16/9;
  position: relative;
}

.viewport-video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Compare Specifications Diff List */
.compare-specs-diff {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
}

.spec-diff-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.spec-diff-table tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.spec-diff-table td {
  padding: 8px 12px;
}

.spec-diff-table td.label {
  color: var(--text-muted);
  font-weight: 500;
  width: 120px;
}

.spec-diff-table td.val {
  font-family: monospace;
  color: #fff;
  text-align: right;
}

/* TAB 3: Simulated Dev Console logs */
.terminal-workspace {
  background: #060608;
  border: 1px solid rgba(0, 240, 255, 0.12);
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.terminal-header {
  background: #0d0d11;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.terminal-title {
  font-size: 0.75rem;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.terminal-actions {
  display: flex;
  gap: 12px;
}

.terminal-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-family: inherit;
}

.terminal-action-btn:hover {
  color: #fff;
}

.terminal-body {
  flex: 1;
  padding: 1.5rem;
  overflow-y: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.log-line {
  display: flex;
  gap: 12px;
  animation: logFade 0.2s ease-out forwards;
}

@keyframes logFade {
  from { opacity: 0; transform: translateX(-4px); }
  to { opacity: 1; transform: translateX(0); }
}

.log-time {
  color: #586e75;
  user-select: none;
  min-width: 90px;
}

.log-node {
  color: #8b5cf6;
}

.log-level {
  font-weight: 700;
  min-width: 60px;
}

.log-level.info { color: var(--primary); }
.log-level.warn { color: var(--warning); }
.log-level.error { color: var(--danger); }
.log-level.success { color: var(--success); }

.log-msg {
  color: #f0f4f8;
}

/* TAB 4: About & Resume Section */
.about-workspace {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2.2rem;
}

.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 2.2rem;
  gap: 1.5rem;
}

.profile-avatar-large {
  width: 140px;
  height: 140px;
  border-radius: 24px;
  background: rgba(0, 240, 255, 0.05);
  border: 1px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 0 25px var(--primary-glow);
}

.profile-avatar-large svg {
  width: 70px;
  height: 70px;
  fill: var(--primary);
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 700;
}

.profile-title-tag {
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.profile-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  margin-top: 1rem;
}

.profile-link-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glow);
  padding: 10px;
  border-radius: 8px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.profile-link-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--primary);
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.details-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.details-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.details-section h2::before {
  content: '';
  width: 4px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
}

.details-section p {
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 0.95rem;
}

/* Timeline Layout */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  position: relative;
  padding-left: 20px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: rgba(255, 255, 255, 0.08);
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -20px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-darker);
  box-shadow: 0 0 8px var(--accent);
}

.timeline-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.timeline-date {
  font-size: 0.78rem;
  font-family: monospace;
  color: var(--accent);
  font-weight: 700;
}

.timeline-role {
  font-size: 1rem;
  font-weight: 650;
  color: #fff;
}

.timeline-company {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.timeline-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-top: 4px;
}

.skills-bag {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.skill-pill {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glow);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
}

/* ==========================================
   INTERACTIVE SIMULATION HUD MODAL OVERLAY
   ========================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 7, 0.92);
  backdrop-filter: blur(12px);
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-window {
  width: 100%;
  max-width: 1450px;
  height: 90vh;
  display: grid;
  grid-template-columns: 1fr 390px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.75);
}

/* Modal Video/HUD Left Panel */
.modal-viewer-panel {
  display: flex;
  flex-direction: column;
  background: #000;
  position: relative;
  min-height: 0;
}

.modal-header-bar {
  padding: 12px 1.5rem;
  background: rgba(10, 10, 14, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.modal-header-bar h2 {
  font-size: 1.1rem;
  font-weight: 650;
  color: #fff;
  font-family: monospace;
}

.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.close-modal-btn:hover {
  color: #fff;
}

.modal-video-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
}

.modal-video-wrapper video {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* MAVLink / Gazebo HUD HUD OVERLAY */
.hud-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none; /* Let clicks pass through to video */
  display: grid;
  grid-template-columns: 200px 1fr 200px;
  padding: 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 5;
}

.hud-overlay.active {
  opacity: 1;
}

.hud-left, .hud-right {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.5rem;
}

.hud-left {
  align-items: flex-start;
}

.hud-right {
  align-items: flex-end;
}

.hud-widget {
  background: rgba(10, 10, 14, 0.65);
  border: 1px solid rgba(0, 240, 255, 0.15);
  padding: 10px 14px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
  min-width: 140px;
}

.hud-widget.warning {
  border-color: rgba(255, 183, 0, 0.4);
}

.hud-label {
  color: var(--text-muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hud-val {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
}

.hud-val.warning {
  color: var(--warning);
}

.hud-val.critical {
  color: var(--danger);
  animation: blinkRed 1s step-end infinite;
}

@keyframes blinkRed {
  50% { opacity: 0; }
}

/* Center Pitch Ladder crosshair */
.hud-center {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hud-crosshair {
  width: 40px;
  height: 40px;
  position: relative;
}

.hud-crosshair::before, .hud-crosshair::after {
  content: '';
  position: absolute;
  background: var(--primary);
}

/* horizontal line crosshair */
.hud-crosshair::before {
  top: 50%;
  left: -20px;
  right: -20px;
  height: 2px;
}

/* vertical line crosshair */
.hud-crosshair::after {
  left: 50%;
  top: -20px;
  bottom: -20px;
  width: 2px;
}

/* Pitch Indicator Ladder */
.pitch-ladder {
  position: absolute;
  width: 120px;
  height: 200px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.pitch-line {
  width: 60px;
  border-top: 1.5px dashed var(--primary);
  margin: 10px 0;
  position: relative;
  transition: transform 0.1s linear;
}

.pitch-line::before, .pitch-line::after {
  position: absolute;
  top: -12px;
  color: var(--primary);
  font-size: 0.65rem;
}

.pitch-line::before {
  content: attr(data-deg);
  left: -24px;
}

.pitch-line::after {
  content: attr(data-deg);
  right: -24px;
}

/* HUD flight state mode strip at the bottom */
.hud-status-bar {
  position: absolute;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(10, 10, 14, 0.8);
  border: 1px solid rgba(0, 240, 255, 0.2);
  padding: 6px 20px;
  border-radius: 20px;
  font-weight: 700;
  color: var(--primary);
  backdrop-filter: blur(4px);
  z-index: 6;
}

/* Custom Playback Speed/Frame step controllers */
.custom-video-controls {
  padding: 12px 1.5rem;
  background: #0d0d11;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
}

.seek-slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
}

.time-display {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  min-width: 45px;
}

#control-current-time {
  text-align: left;
}

#control-duration {
  text-align: right;
}

#control-seek {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  accent-color: var(--primary);
  transition: background 0.2s ease;
}

#control-seek:hover {
  background: rgba(255, 255, 255, 0.18);
}

#control-seek::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
  cursor: pointer;
  transition: transform 0.1s ease;
}

#control-seek::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

.controls-actions-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.controls-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glow);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--primary);
}

.play-pause-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  padding: 0;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--primary);
}

.play-pause-btn:hover {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--primary);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
}

.play-pause-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.divider {
  height: 20px;
  width: 1px;
  background: rgba(255, 255, 255, 0.1);
  margin: 0 4px;
}

.control-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.select-controls {
  gap: 16px;
}

.control-select-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
}

.controls-group select {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-glow);
  color: #fff;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
}

/* Modal Sidebar Panels */
.modal-sidebar-panel {
  background: var(--bg-sidebar);
  border-left: 1px solid var(--border-glow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-tabs-bar {
  display: flex;
  background: #0d0d11;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  padding: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
  font-family: inherit;
}

.tab-btn:hover {
  color: #fff;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.sidebar-tab-content {
  display: none;
  flex-direction: column;
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
}

.sidebar-tab-content.active {
  display: flex;
}

/* Specs list styles */
.spec-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.spec-label {
  color: var(--text-muted);
}

.spec-val {
  font-weight: 500;
  font-family: monospace;
  color: #fff;
}

/* Methodology & Code elements */
.analysis-text {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.5rem;
}

.analysis-text strong {
  color: #fff;
}

.code-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 6px;
  font-family: monospace;
}

.code-block-wrapper {
  background: #060608;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}

.code-block-wrapper pre {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  line-height: 1.45;
  color: var(--success);
}

/* Annotation list timeline styling */
.notes-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex: 1;
  overflow: hidden;
}

.notes-timeline {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-right: 4px;
}

.note-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.note-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.note-time {
  font-family: monospace;
  color: var(--primary);
  font-weight: 700;
  cursor: pointer;
  font-size: 0.8rem;
}

.note-time:hover {
  text-decoration: underline;
}

.note-delete {
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 0.75rem;
  opacity: 0.6;
}

.note-delete:hover {
  opacity: 1;
}

.note-body {
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--text-muted);
}

.note-submit-form {
  display: flex;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.note-submit-form input {
  flex: 1;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glow);
  padding: 8px 12px;
  border-radius: 6px;
  color: #fff;
  font-size: 0.82rem;
  font-family: inherit;
}

.note-submit-form input:focus {
  border-color: var(--primary);
  outline: none;
}

.note-submit-form button {
  background: var(--primary);
  color: var(--bg-darker);
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
}

.note-submit-form button:hover {
  box-shadow: 0 0 10px var(--primary-glow);
}

/* Scrollbar customizations */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.15);
}

/* ==========================================
   RESPONSIVE DESIGN & MOBILE OPTIMIZATIONS
   ========================================== */

.nav-toggle {
  display: none;
}

/* Tablet Layout overrides (screens <= 1024px) */
@media (max-width: 1024px) {
  .app-container {
    grid-template-columns: 240px 1fr;
  }

  .stats-counter-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .repository-split-view {
    grid-template-columns: 1fr;
  }
}

/* Mobile Layout overrides (screens <= 768px) */
@media (max-width: 768px) {
  body {
    height: auto;
    overflow-y: auto;
  }

  /* Global Navbar Mobile Styling */
  nav {
    position: fixed;
    top: 0;
    height: 70px;
    padding: 0;
    display: flex;
    align-items: center;
  }

  .nav-container {
    width: 100%;
    padding: 0 1.5rem;
    position: relative;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.3rem;
    cursor: pointer;
    transition: color 0.2s ease;
    padding: 8px;
  }

  .nav-toggle:hover {
    color: var(--primary);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 14, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    text-align: center;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 10px;
    font-size: 1.05rem;
  }

  .nav-links a::after {
    display: none; /* remove hover line effect on mobile for cleaner look */
  }

  /* Main Workspace Mobile Layout */
  .app-container {
    grid-template-columns: 100%;
    width: 100%;
    max-width: 100%;
    height: auto;
    margin-top: 70px;
    overflow: visible;
  }

  /* Sidebar styling stacked on mobile */
  aside {
    border-right: none;
    border-bottom: 1px solid var(--border-glow);
    height: auto;
    padding: 1.25rem;
    gap: 1.5rem;
    overflow-y: visible;
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  /* Make categories scrollable horizontally on mobile */
  .nav-section {
    display: flex;
    flex-direction: row !important;
    overflow-x: auto;
    white-space: nowrap;
    gap: 8px;
    padding-bottom: 8px;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    max-width: 100%;
  }

  .nav-section::-webkit-scrollbar {
    height: 4px;
  }

  .nav-section::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
  }

  .nav-title {
    display: none; /* Hide section titles to save space on mobile horizontal lists */
  }

  .nav-btn {
    display: inline-flex;
    padding: 8px 12px;
    font-size: 0.82rem;
    flex-shrink: 0;
  }

  /* Main workspace padding */
  main {
    padding: 1.25rem;
    gap: 1.5rem;
    overflow-y: visible;
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    text-align: center;
  }

  .search-bar {
    width: 100%;
  }

  /* Stats strip to 2 columns on small screens */
  .stats-counter-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .stat-item {
    padding: 1rem;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  /* Videos Grid */
  .videos-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  /* Compare page styles stacked */
  .compare-selectors {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .sync-toggle-btn {
    align-self: stretch;
    justify-content: center;
    margin-top: 5px;
  }

  .compare-viewports {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .compare-specs-diff {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  /* Logs view page font size adjustment */
  .terminal-body {
    padding: 1rem;
    font-size: 0.78rem;
  }

  .log-line {
    flex-direction: column;
    gap: 2px;
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  }

  .log-time, .log-level, .log-node {
    display: inline-block;
    min-width: 0;
    margin-right: 8px;
  }

  .log-msg {
    display: block;
    word-break: break-all;
    overflow-wrap: anywhere;
    margin-top: 2px;
  }

  /* About Developer page styling */
  .about-workspace {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Modals Stacked on mobile */
  .modal-window {
    grid-template-columns: 1fr;
    height: auto;
    max-height: 95vh;
    overflow-y: auto;
  }

  .modal-sidebar-panel {
    border-left: none;
    border-top: 1px solid var(--border-glow);
    height: auto;
    max-height: none;
    overflow: visible;
  }

  .sidebar-tab-content {
    max-height: none;
    overflow: visible;
  }

  /* HUD Overlay adaptations */
  .hud-overlay {
    grid-template-columns: 1fr;
    padding: 0.5rem;
    font-size: 0.7rem;
    gap: 8px;
  }

  .hud-left, .hud-right {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 6px;
  }

  .hud-widget {
    min-width: 0;
    flex: 1;
    padding: 6px 8px;
  }

  .hud-center {
    display: none; /* Hide center crosshair on tiny viewports to keep visibility clean */
  }

  .hud-status-bar {
    bottom: 50px;
    padding: 4px 12px;
    font-size: 0.7rem;
  }
}

/* Small mobile viewports */
@media (max-width: 480px) {
  .stats-counter-strip {
    grid-template-columns: 1fr;
  }

  .hud-left, .hud-right {
    flex-direction: column;
    align-items: stretch;
  }

  .hud-widget {
    width: 100%;
  }

  .modal-header-bar h2 {
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 180px;
  }
}