/* MANDATORY: Apply color-scheme to :root or html for viewport-wide theming */
:root {
  color-scheme: light dark;

  --brand-accent-light: #0066cc;
  --brand-accent-dark: #38bdf8;
  --accent-color: var(--brand-accent-dark);

  --panel-bg-light: rgba(12, 18, 32, 0.78);
  --panel-bg-dark: rgba(8, 12, 22, 0.76);
  --panel-bg: var(--panel-bg-dark);

  --panel-border: rgba(148, 163, 184, 0.22);
  --panel-border-active: rgba(56, 189, 248, 0.65);

  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-accent: #38bdf8;
  --gold-accent: #f59e0b;
  --emerald-accent: #10b981;

  --scrollbar-thumb: rgba(148, 163, 184, 0.45);
  --scrollbar-track: rgba(15, 23, 42, 0.35);

  @media (prefers-color-scheme: dark) {
    --accent-color: var(--brand-accent-dark);
    --panel-bg: var(--panel-bg-dark);
  }

  @supports (color: light-dark(white, black)) {
    --accent-color: light-dark(var(--brand-accent-light), var(--brand-accent-dark));
    --panel-bg: light-dark(var(--panel-bg-light), var(--panel-bg-dark));
  }

  accent-color: var(--accent-color);
  font-family: "Inter", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #02040a;
  color: var(--text-main);
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

#webgl-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  cursor: grab;
  z-index: 1;
}

#webgl-canvas:active {
  cursor: grabbing;
}

/* Custom Scrollbar per Modern Web Guidance */
.scroller {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
  scrollbar-gutter: stable;
}

@supports not (scrollbar-color: auto) {
  .scroller::-webkit-scrollbar {
    width: 8px;
    height: 8px;
  }
  .scroller::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
  }
  .scroller::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
  }
}

/* HUD Glass Panels */
.hud-panel {
  position: fixed;
  z-index: 10;
  background: var(--panel-bg);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  transition: opacity 0.45s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Top Header */
.hud-header {
  top: 16px;
  left: 16px;
  right: 16px;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.mission-brand {
  min-width: 260px;
}

.nasa-vector {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text-accent);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.mission-brand h1 {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #ffffff;
}

.mission-brand p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.telemetry-grid {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.telemetry-item {
  display: flex;
  flex-direction: column;
  padding-left: 14px;
  border-left: 2px solid rgba(56, 189, 248, 0.35);
}

.telemetry-label {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.telemetry-value {
  font-family: "JetBrains Mono", "SF Mono", "Menlo", monospace;
  font-size: 1.05rem;
  font-weight: 600;
  color: #f8fafc;
  margin-top: 2px;
  font-variant-numeric: tabular-nums;
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Sidebar */
.hud-sidebar {
  top: 108px;
  right: 16px;
  width: 340px;
  max-height: calc(100vh - 245px);
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-section h2 {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-accent);
  margin-bottom: 8px;
  text-transform: uppercase;
}

#phase-description {
  font-size: 0.84rem;
  line-height: 1.58;
  color: #e2e8f0;
}

.comms-box {
  margin-top: 10px;
  padding: 10px 12px;
  background: rgba(15, 23, 42, 0.65);
  border-left: 3px solid var(--gold-accent);
  border-radius: 6px;
}

.comms-tag {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold-accent);
  margin-bottom: 4px;
}

#phase-quote {
  font-family: "JetBrains Mono", "SF Mono", monospace;
  font-size: 0.76rem;
  font-style: italic;
  color: #fde68a;
  line-height: 1.45;
}

.camera-buttons {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.controls-hint {
  margin-top: 8px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--text-muted);
}

kbd {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.7rem;
  font-family: monospace;
}

.asset-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 120px;
  overflow-y: auto;
}

.asset-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: #cbd5e1;
  padding: 5px 8px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
}

.badge {
  font-family: monospace;
  font-size: 0.66rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.18);
  color: var(--text-accent);
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.badge.ready {
  background: rgba(16, 185, 129, 0.18);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.4);
}

/* Bottom Timeline Footer */
.hud-footer {
  bottom: 16px;
  left: 16px;
  right: 16px;
  padding: 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.phase-tabs {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.phase-tab {
  background: rgba(30, 41, 59, 0.55);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 9px;
  padding: 8px 10px;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  display: flex;
  flex-direction: column;
  transition: all 0.2s ease;
}

.phase-tab:hover {
  background: rgba(51, 65, 85, 0.7);
  border-color: rgba(56, 189, 248, 0.45);
}

.phase-tab.active {
  background: linear-gradient(135deg, rgba(14, 116, 144, 0.55), rgba(30, 58, 138, 0.65));
  border-color: var(--text-accent);
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.25);
}

.step-num {
  font-family: monospace;
  font-size: 0.68rem;
  color: var(--text-accent);
  font-weight: 700;
}

.step-name {
  font-size: 0.84rem;
  font-weight: 600;
  margin-top: 2px;
}

.step-sub {
  font-size: 0.68rem;
  color: var(--text-muted);
}

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

.scrubber-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#timeline-slider {
  width: 100%;
  cursor: pointer;
  height: 6px;
}

.timeline-progress-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: monospace;
}

.speed-buttons {
  display: flex;
  gap: 4px;
}

/* Buttons */
.hud-btn {
  background: rgba(30, 41, 59, 0.75);
  color: var(--text-main);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 8px;
  padding: 7px 12px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.18s ease;
}

.hud-btn:hover {
  background: rgba(51, 65, 85, 0.9);
  border-color: rgba(56, 189, 248, 0.5);
}

.hud-btn.active,
.hud-btn.primary {
  background: rgba(2, 132, 199, 0.35);
  border-color: var(--text-accent);
  color: #ffffff;
}

/* Asset Loading Badge */
.asset-badge {
  position: fixed;
  top: 108px;
  left: 16px;
  z-index: 12;
  background: rgba(8, 12, 22, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  padding: 6px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: #cbd5e1;
  transition: opacity 0.4s ease;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--emerald-accent);
}

.status-dot.loading {
  background: var(--gold-accent);
  animation: pulse 1.2s infinite ease-in-out;
}

@keyframes pulse {
  0%, 100% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.25); opacity: 1; }
}

/* Screensaver Mode (Hide HUD) */
body.screensaver-mode .hud-panel,
body.screensaver-mode .asset-badge {
  opacity: 0;
  pointer-events: none;
}

body.screensaver-mode .hud-header {
  transform: translateY(-25px);
}

body.screensaver-mode .hud-sidebar {
  transform: translateX(25px);
}

body.screensaver-mode .hud-footer {
  transform: translateY(25px);
}

.screensaver-wake-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 20;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.76rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, background 0.2s ease;
}

body.screensaver-mode .screensaver-wake-btn {
  opacity: 0.45;
  pointer-events: auto;
}

body.screensaver-mode .screensaver-wake-btn:hover {
  opacity: 1;
  background: rgba(2, 132, 199, 0.65);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

@media (max-width: 1024px) {
  .hud-sidebar {
    width: 280px;
  }
  .phase-tabs {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .hud-sidebar {
    display: none;
  }
  .telemetry-grid {
    display: none;
  }
}