:root {
  --bg-deep: #060b16;
  --bg-panel: #0d1628;
  --bg-card: #121f38;
  --bg-card-hover: #172745;
  --border-subtle: rgba(56, 189, 248, 0.18);
  --border-strong: rgba(56, 189, 248, 0.42);
  --text-main: #edf4ff;
  --text-muted: #93a7c7;
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --optimal: #10b981;
  --optimal-bg: rgba(16, 185, 129, 0.14);
  --watch: #f59e0b;
  --watch-bg: rgba(245, 158, 11, 0.15);
  --critical: #ef4444;
  --critical-bg: rgba(239, 68, 68, 0.16);
  --radius: 14px;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at 18% 0%, #0f1f3d 0%, var(--bg-deep) 55%);
  color: var(--text-main);
  font-family: var(--font-ui);
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--accent-cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1420px;
  margin: 0 auto;
  padding: 16px 20px 44px;
}

/* Top Mission Header */
.topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  background: rgba(13, 22, 40, 0.92);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 12px 18px;
  margin-bottom: 14px;
  backdrop-filter: blur(10px);
}

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

.brand img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid rgba(56, 189, 248, 0.5);
  object-fit: cover;
}

.brand h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.control-group label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

select, button, input[type="number"] {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-main);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 6px 10px;
}

button {
  cursor: pointer;
  transition: transform 0.12s ease, border-color 0.15s ease, background 0.15s ease;
}

button:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
}

.btn-primary {
  background: linear-gradient(135deg, #0284c7, #2563eb);
  border-color: rgba(56, 189, 248, 0.65);
  font-weight: 600;
}

.btn-warn {
  background: rgba(245, 158, 11, 0.16);
  border-color: rgba(245, 158, 11, 0.55);
  color: #fde68a;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

.status-optimal { color: var(--optimal); background: var(--optimal-bg); border-color: rgba(16, 185, 129, 0.45); }
.status-watch { color: var(--watch); background: var(--watch-bg); border-color: rgba(245, 158, 11, 0.5); }
.status-critical { color: var(--critical); background: var(--critical-bg); border-color: rgba(239, 68, 68, 0.55); }

/* Scenario Strip */
.scenario-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 14px;
}

.scenario-buttons, .tool-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
}

.scenario-btn.active {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.2);
  color: #e0f2fe;
}

/* Main Cockpit Grid */
.cockpit-grid {
  display: grid;
  grid-template-columns: 390px 1fr;
  gap: 14px;
  margin-bottom: 14px;
}

@media (max-width: 1080px) {
  .cockpit-grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 15px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.panel-title {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Interactive Human Anatomy SVG */
.anatomy-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.anatomy-svg {
  width: 100%;
  max-width: 310px;
  height: auto;
  filter: drop-shadow(0 0 18px rgba(56, 189, 248, 0.14));
}

.body-hotspot {
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.body-hotspot:hover .hotspot-ring {
  stroke-width: 3.5;
  opacity: 1;
}

.body-hotspot.selected .hotspot-core {
  stroke: #ffffff;
  stroke-width: 2.5;
}

.region-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.region-chip {
  font-size: 0.74rem;
  padding: 4px 9px;
  border-radius: 8px;
}

.region-chip.selected {
  border-color: #fff;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.region-detail-box {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  padding: 11px 13px;
  font-size: 0.84rem;
}

.region-detail-box h3 {
  margin: 0 0 6px;
  font-size: 0.92rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.hazard-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 8px;
}

.hazard-tag {
  font-size: 0.69rem;
  padding: 2px 7px;
  border-radius: 6px;
  background: rgba(56, 189, 248, 0.12);
  color: #bae6fd;
  border: 1px solid rgba(56, 189, 248, 0.28);
}

/* Telemetry & Vitals Grid */
.summary-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.metric-highlight {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 11px;
  padding: 10px 12px;
}

.metric-highlight .k {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.metric-highlight .v {
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--font-mono);
  margin-top: 2px;
}

.vitals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(215px, 1fr));
  gap: 10px;
}

.vital-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-left-width: 4px;
  border-radius: 10px;
  padding: 9px 11px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.vital-card.st-optimal { border-left-color: var(--optimal); }
.vital-card.st-watch { border-left-color: var(--watch); }
.vital-card.st-critical { border-left-color: var(--critical); background: rgba(239, 68, 68, 0.08); }

.vital-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 6px;
}

.vital-name { font-size: 0.79rem; font-weight: 600; color: #dbeafe; }

.vital-readout {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 700;
}

.vital-slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.vital-slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent-cyan);
  cursor: pointer;
}

.vital-slider-row input[type="number"] {
  width: 68px;
  padding: 3px 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: right;
}

.vital-range-hint {
  font-size: 0.69rem;
  color: var(--text-muted);
}

/* Action Advisories */
.actions-box {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.action-item {
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  font-size: 0.83rem;
}

.action-item strong { display: block; margin-bottom: 2px; }

/* Lower Tabbed Studio */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 10px;
  margin-bottom: 14px;
}

.tab-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-weight: 600;
  padding: 7px 14px;
}

.tab-btn.active {
  background: rgba(56, 189, 248, 0.16);
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 900px) {
  .charts-grid { grid-template-columns: 1fr; }
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 12px;
}

canvas#ecgCanvas {
  width: 100%;
  height: 170px;
  display: block;
  background: #060e1a;
  border-radius: 8px;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

/* Quests & Quizzes */
.quests-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 14px;
}

@media (max-width: 950px) {
  .quests-grid { grid-template-columns: 1fr; }
}

.quest-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 8px;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.quest-card input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--optimal);
  cursor: pointer;
}

.xp-bar-wrap {
  height: 10px;
  background: #070d19;
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  margin: 8px 0;
}

.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #38bdf8);
  width: 0%;
  transition: width 0.25s ease;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.quiz-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 13px;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  margin-top: 7px;
  padding: 8px 10px;
}

/* Data / Packet Inspector */
.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 960px) {
  .data-grid { grid-template-columns: 1fr; }
}

.hex-box {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: #060d19;
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  padding: 10px 12px;
  word-break: break-all;
  color: #7dd3fc;
}

.osdr-list {
  display: grid;
  gap: 8px;
  max-height: 310px;
  overflow-y: auto;
}

.osdr-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 9px 11px;
  font-size: 0.82rem;
}

/* Modal for Webcam rPPG */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.78);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 99;
  padding: 16px;
}

.modal-backdrop.open { display: flex; }

.modal-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  max-width: 520px;
  width: 100%;
  padding: 18px;
}

.rppg-preview {
  display: flex;
  gap: 12px;
  align-items: center;
  margin: 10px 0;
}

.rppg-preview video {
  width: 160px;
  height: 120px;
  background: #040812;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border-subtle);
}

footer.site-footer {
  margin-top: 22px;
  text-align: center;
  font-size: 0.79rem;
  color: var(--text-muted);
}