:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border: #cbd5e1;
  --border-subtle: #e2e8f0;
  --text: #0f172a;
  --text-muted: #475569;
  --navy: #1b365d;
  --blue: #2563eb;
  --blue-soft: #dbeafe;
  --green: #16a34a;
  --green-soft: #dcfce7;
  --amber: #d97706;
  --amber-soft: #fef3c7;
  --red: #dc2626;
  --red-soft: #fee2e2;
  --purple: #7c3aed;
  --purple-soft: #ede9fe;
  --teal: #0d9488;
  --teal-soft: #ccfbf1;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(15, 23, 42, 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button, input, select, textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

/* Topbar */
.topbar {
  background: linear-gradient(135deg, #0f172a 0%, #1b365d 55%, #1e3a8a 100%);
  color: #fff;
  padding: 0.55rem 1.15rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.85rem;
  flex-wrap: wrap;
  border-bottom: 2px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.16);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-badge {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.16);
  border: 1px solid rgba(56, 189, 248, 0.35);
  display: grid;
  place-items: center;
  color: #7dd3fc;
}

.brand-title-row {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.brand h1 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(56, 189, 248, 0.2);
  color: #bae6fd;
  border: 1px solid rgba(125, 211, 252, 0.35);
  padding: 0.1rem 0.42rem;
  border-radius: 999px;
}

.subtitle {
  margin: 0.05rem 0 0 0;
  font-size: 0.75rem;
  color: #cbd5e1;
}

.header-selectors {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(15, 23, 42, 0.48);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  padding: 0.3rem 0.65rem;
  flex-wrap: wrap;
}

.header-divider {
  width: 1px;
  height: 22px;
  background: rgba(255, 255, 255, 0.2);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.lang-select {
  background: rgba(15, 23, 42, 0.55);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 7px;
  padding: 0.34rem 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}

.lang-select option {
  background: #0f172a;
  color: #fff;
}

.select-wrap {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: #e2e8f0;
}

.select-micro {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #93c5fd;
}

.select-wrap select {
  background: transparent;
  color: #fff;
  border: none;
  padding: 0.2rem 0.25rem;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
}

.select-wrap select option {
  background: #0f172a;
  color: #fff;
}

@media (max-width: 1200px) {
  .subtitle {
    display: none;
  }
}

@media (max-width: 720px) {
  .header-divider {
    display: none;
  }
}

.progress-pill {
  background: rgba(255, 255, 255, 0.14);
  color: #fde68a;
  border: 1px solid rgba(253, 230, 138, 0.35);
  border-radius: 999px;
  padding: 0.26rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 700;
  white-space: nowrap;
}

.block-estimate {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
}

.editor-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.poe-bar {
  margin-top: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
}

.poe-btn {
  border: 1px solid #93c5fd;
  background: #fff;
  color: var(--navy);
  border-radius: 999px;
  padding: 0.14rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
}

.poe-btn.selected {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

.telemetry-toggles {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.telemetry-chart-wrap {
  margin-top: 0.45rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

#telemetry-chart {
  flex: 1;
  background: #0f172a;
  border-radius: 6px;
  height: 54px;
  width: 100%;
}

/* Buttons */
.btn {
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 0.42rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: transform 0.08s ease, background-color 0.15s ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-small {
  padding: 0.28rem 0.6rem;
  font-size: 0.78rem;
}

.btn-primary {
  background: var(--green);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { background: #15803d; }

.btn-secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--border);
}
.topbar .btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
}
.btn-secondary:hover:not(:disabled) { background: #f1f5f9; }
.topbar .btn-secondary:hover:not(:disabled) { background: rgba(255, 255, 255, 0.2); }

.btn-accent {
  background: #f59e0b;
  color: #0f172a;
}
.btn-accent:hover:not(:disabled) { background: #fbbf24; }

.btn-danger {
  background: var(--red);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { background: #b91c1c; }

.btn-link {
  background: none;
  border: none;
  color: var(--blue);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
}

/* Main Workspace Layout */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(360px, 44%) 1fr;
  align-items: start;
  gap: 0.9rem;
  padding: 0.9rem;
  max-width: 1600px;
  width: 100%;
  margin: 0 auto;
}

@media (min-width: 1041px) {
  .panel-arena {
    position: -webkit-sticky;
    position: sticky;
    top: 0.75rem;
  }
}

@media (max-width: 1040px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}

.flight-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.45rem 0.75rem;
  background: #f1f5f9;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.flight-bar-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--navy);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Left Panel: Code Studio */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.tab-group {
  display: flex;
  flex-wrap: wrap;
  background: #e2e8f0;
  padding: 3px;
  border-radius: 8px;
  gap: 3px;
}

.tab {
  border: none;
  background: transparent;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

.tab.active {
  background: #fff;
  color: var(--navy);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.run-controls {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tab-pane {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 310px;
}

.tab-pane[hidden] {
  display: none;
}

/* Visual Blocks */
.block-palette {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  background: #fcfdff;
}

.palette-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.chip {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.22rem 0.62rem;
  font-size: 0.76rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
}

.chip-setup { background: var(--purple-soft); color: #5b21b6; border-color: #c4b5fd; }
.chip-flight { background: var(--blue-soft); color: #1e40af; border-color: #93c5fd; }
.chip-move { background: var(--teal-soft); color: #115e59; border-color: #5eead4; }
.chip-wait { background: var(--amber-soft); color: #92400e; border-color: #fcd34d; }
.chip-loop { background: #fce7f3; color: #9d174d; border-color: #f9a8d4; }
.chip-danger { background: var(--red-soft); color: #991b1b; border-color: #fca5a5; }

.block-workspace {
  flex: 1;
  padding: 0.75rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 340px;
  background: #f8fafc;
}

.block-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.48rem 0.65rem;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-left: 5px solid var(--blue);
  font-size: 0.82rem;
  transition: box-shadow 0.15s ease, transform 0.1s ease;
}

.block-item.type-init { border-left-color: var(--purple); }
.block-item.type-takeoff, .block-item.type-land { border-left-color: var(--blue); }
.block-item.type-control { border-left-color: var(--teal); }
.block-item.type-sleep { border-left-color: var(--amber); }
.block-item.type-loop, .block-item.type-endloop { border-left-color: #db2777; }
.block-item.type-stop { border-left-color: var(--red); }

.block-item.indented {
  margin-left: 1.5rem;
}

.block-item.executing {
  box-shadow: 0 0 0 2px var(--green), 0 4px 12px rgba(22, 163, 74, 0.18);
  background: #f0fdf4;
}

.block-content {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.block-title {
  font-weight: 700;
  color: var(--navy);
}

.block-input {
  width: 58px;
  min-height: 28px;
  padding: 0.2rem 0.35rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: center;
  background: #f8fafc;
}

.block-select {
  min-height: 28px;
  padding: 0.2rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 5px;
  font-size: 0.8rem;
  background: #f8fafc;
}

.block-actions {
  display: flex;
  gap: 0.28rem;
}

.icon-btn {
  border: 1px solid var(--border-subtle);
  background: #fff;
  color: var(--text-muted);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 0.82rem;
}
.icon-btn:hover { background: #f1f5f9; color: var(--text); }
.icon-btn.del:hover { background: var(--red-soft); color: var(--red); }

.block-footer {
  padding: 0.45rem 0.75rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: #fff;
}

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

/* MicroPython Editor */
.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.75rem;
  background: #1e293b;
  color: #cbd5e1;
  font-size: 0.78rem;
}

.file-pill {
  font-family: var(--font-mono);
  color: #93c5fd;
}

.speed-label select {
  background: #0f172a;
  color: #fff;
  border: 1px solid #475569;
  border-radius: 5px;
  padding: 0.15rem 0.4rem;
  font-size: 0.78rem;
}

.code-editor-wrap {
  display: flex;
  flex: 1;
  background: #0f172a;
  min-height: 290px;
  max-height: 350px;
  overflow: hidden;
  position: relative;
}

.line-numbers {
  width: 38px;
  padding: 0.65rem 0.35rem;
  background: #1e293b;
  color: #64748b;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.5;
  text-align: right;
  user-select: none;
  overflow: hidden;
}

.line-numbers .active-line {
  display: inline-block;
  width: 100%;
  background: #16a34a;
  color: #fff;
  border-radius: 3px;
  font-weight: 700;
}

#python-editor {
  flex: 1;
  border: none;
  resize: none;
  padding: 0.65rem;
  background: #0f172a;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.83rem;
  line-height: 1.5;
  tab-size: 4;
}

#python-editor:focus {
  outline: none;
}

/* Console */
.console-section {
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: #0b1120;
  color: #cbd5e1;
}

.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.32rem 0.75rem;
  background: #162033;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #94a3b8;
}

.console-output {
  height: 125px;
  overflow-y: auto;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.77rem;
  line-height: 1.45;
}

.log-line { margin-bottom: 0.18rem; }
.log-info { color: #93c5fd; }
.log-ok { color: #4ade80; }
.log-warn { color: #fbbf24; }
.log-err { color: #f87171; font-weight: 600; }

/* Right Panel: Flight Arena */
.arena-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.status-pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.led-pill, .mode-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.58rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #fff;
  border: 1px solid var(--border-subtle);
}

.led-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #3b82f6;
}

.led-dot.flashing {
  animation: pulseBlue 0.8s infinite alternate;
}

.led-dot.blue-solid {
  background: #2563eb;
  box-shadow: 0 0 6px #3b82f6;
}

.led-dot.green-on {
  background: #16a34a;
  box-shadow: 0 0 6px #22c55e;
}

@keyframes pulseBlue {
  from { opacity: 0.25; }
  to { opacity: 1; box-shadow: 0 0 8px #3b82f6; }
}

.view-controls {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.view-switch {
  display: flex;
  background: #e2e8f0;
  padding: 2px;
  border-radius: 7px;
}

.btn-view {
  border: none;
  background: transparent;
  padding: 0.24rem 0.55rem;
  font-size: 0.76rem;
  font-weight: 600;
  border-radius: 5px;
  cursor: pointer;
  color: var(--text-muted);
}

.btn-view.active {
  background: #fff;
  color: var(--navy);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Mission Banner */
.mission-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.5rem 0.85rem;
  background: #eff6ff;
  border-bottom: 1px solid #bfdbfe;
  font-size: 0.83rem;
}

.mission-info strong {
  color: var(--navy);
  margin-right: 0.45rem;
}

.mission-badge {
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: #dbeafe;
  color: #1e40af;
  white-space: nowrap;
}

.mission-badge.success {
  background: var(--green-soft);
  color: #166534;
}

.mission-badge.fail {
  background: var(--red-soft);
  color: #991b1b;
}

/* Canvas Viewport */
.canvas-wrap {
  position: relative;
  background: #0f172a;
  display: flex;
  justify-content: center;
  align-items: center;
}

#flight-canvas {
  width: 100%;
  height: auto;
  max-height: 430px;
  display: block;
  cursor: grab;
  touch-action: none;
}

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

/* Camera Rotation Bar */
.camera-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.42rem 0.8rem;
  background: #162033;
  color: #cbd5e1;
  font-size: 0.75rem;
  flex-wrap: wrap;
}

.camera-bar-title {
  font-weight: 700;
  color: #93c5fd;
  white-space: nowrap;
}

.rot-control {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 140px;
}

.rot-control input[type="range"] {
  flex: 1;
  accent-color: #38bdf8;
  cursor: pointer;
}

.rot-control output {
  font-family: var(--font-mono);
  min-width: 36px;
  text-align: right;
  color: #f8fafc;
}

.canvas-overlay-tl, .canvas-overlay-br {
  position: absolute;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: #cbd5e1;
  background: rgba(15, 23, 42, 0.75);
  padding: 0.25rem 0.55rem;
  border-radius: 6px;
  pointer-events: none;
}

.canvas-overlay-tl { top: 8px; left: 10px; }
.canvas-overlay-br {
  bottom: 8px;
  right: 10px;
  display: flex;
  gap: 0.65rem;
}

/* Bottom Deck: Telemetry & Collapsible Virtual pyController */
.bottom-deck {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.65rem 0.75rem;
  background: var(--surface-alt);
  border-top: 1px solid var(--border-subtle);
}

.controller-drawer {
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  overflow: hidden;
}

.controller-summary {
  list-style: none;
  padding: 0.5rem 0.8rem;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--navy);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f8fafc;
}

.controller-summary::-webkit-details-marker {
  display: none;
}

.controller-drawer[open] .controller-summary {
  border-bottom: 1px solid var(--border-subtle);
}

.controller-drawer .controller-card {
  border: none;
  border-radius: 0;
}

.telemetry-card, .controller-card {
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 0.65rem 0.8rem;
}

.telemetry-card h3, .controller-card h3 {
  margin: 0 0 0.5rem 0;
  font-size: 0.86rem;
  color: var(--navy);
}

.telemetry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
}

.stat {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 0.32rem 0.45rem;
}

.stat-label {
  display: block;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
}

.toggle-wind {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  cursor: pointer;
}

/* Virtual pyController */
.controller-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.4rem;
}

.kbd-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.sticks-row {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 0.5rem;
}

.stick-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stick-pad {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: radial-gradient(circle, #e2e8f0 0%, #cbd5e1 100%);
  border: 2px solid #94a3b8;
  position: relative;
  touch-action: none;
  cursor: grab;
}

.stick-knob {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--navy);
  border: 2px solid #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.stick-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
}

.remote-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
}

.rc-btn {
  border: none;
  border-radius: 7px;
  padding: 0.25rem 0.55rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.35rem;
  min-width: 78px;
}

.rc-btn small { font-weight: 500; opacity: 0.9; font-size: 0.68rem; }
.rc-y { background: var(--blue); }
.rc-a { background: var(--green); }
.rc-x { background: var(--red); }

/* Modals */
.modal-dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  max-width: 780px;
  width: 92vw;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.3);
}

.modal-dialog::backdrop {
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(2px);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.15rem;
  background: var(--navy);
  color: #fff;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.02rem;
}

.btn-close {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.modal-body {
  padding: 1.1rem;
  max-height: 75vh;
  overflow-y: auto;
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 680px) {
  .guide-grid { grid-template-columns: 1fr; }
}

.guide-grid h3 {
  margin: 0 0 0.5rem 0;
  color: var(--navy);
  font-size: 0.94rem;
}

.api-list {
  margin: 0 0 0.8rem 0;
  padding-left: 1.1rem;
  font-size: 0.83rem;
}

.api-list li { margin-bottom: 0.4rem; }

.kbd-desc {
  font-size: 0.82rem;
  background: #f8fafc;
  padding: 0.55rem;
  border-radius: 7px;
  border: 1px solid var(--border-subtle);
}

/* AI Coach */
.coach-body {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.coach-quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.coach-messages {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 0.75rem;
  height: 240px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  font-size: 0.85rem;
}

.coach-msg {
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  max-width: 92%;
}

.coach-msg.bot {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  align-self: flex-start;
}

.coach-msg.user {
  background: var(--navy);
  color: #fff;
  align-self: flex-end;
}

.coach-form {
  display: flex;
  gap: 0.5rem;
}

.coach-form input {
  flex: 1;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 7px;
}

.llm-config {
  font-size: 0.78rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.5rem;
}

.llm-config-body {
  margin-top: 0.45rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.llm-config-body input {
  padding: 0.32rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  max-width: 340px;
}

/* Footer */
.app-footer {
  background: var(--navy);
  color: #cbd5e1;
  padding: 0.55rem 1.25rem;
  font-size: 0.78rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.app-footer strong {
  color: #fff;
}

/* Interactive Tutorial Pane */
.tutorial-pane {
  background: #f8fafc;
}

.tutorial-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: #fff;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
}

.tutorial-steps {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
}

.tut-pill {
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text-muted);
  border-radius: 999px;
  padding: 0.18rem 0.55rem;
  font-size: 0.73rem;
  font-weight: 600;
  cursor: pointer;
}

.tut-pill.active {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

.tutorial-pager {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tut-progress {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.tutorial-content {
  padding: 0.75rem;
  overflow-y: visible;
  max-height: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tut-card {
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 0.75rem 0.9rem;
}

.tut-chapter {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--blue);
  margin-bottom: 0.2rem;
}

.tut-card h3 {
  margin: 0 0 0.4rem 0;
  font-size: 0.98rem;
  color: var(--navy);
}

.tut-diagram-wrap {
  background: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 0.45rem;
  margin-bottom: 0.55rem;
  display: flex;
  justify-content: center;
}

.tut-svg {
  width: 100%;
  max-width: 360px;
  height: auto;
  display: block;
}

.tut-3d-box {
  background: #0f172a;
  border-radius: 8px;
  padding: 0.45rem;
  margin-bottom: 0.55rem;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

#tut-drone-3d {
  width: 100%;
  max-width: 360px;
  height: auto;
  cursor: grab;
  touch-action: none;
  border-radius: 6px;
}

#tut-drone-3d:active {
  cursor: grabbing;
}

.tut-3d-hint {
  position: absolute;
  top: 8px;
  left: 12px;
  font-size: 0.68rem;
  color: #94a3b8;
  pointer-events: none;
}

.tut-3d-controls {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  justify-content: center;
}

.tut-card p, .tut-card li {
  font-size: 0.84rem;
  color: var(--text);
  margin: 0.3rem 0;
}

.tut-card ul {
  padding-left: 1.15rem;
  margin: 0.35rem 0;
}

.tut-code {
  background: #0f172a;
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.6rem 0.75rem;
  border-radius: 7px;
  overflow-x: auto;
  margin: 0.45rem 0;
  white-space: pre;
}

.tut-actions {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

.quiz-box {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 0.65rem 0.8rem;
}

.quiz-q {
  font-weight: 700;
  font-size: 0.83rem;
  color: var(--navy);
  margin-bottom: 0.45rem;
}

.quiz-opts {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.quiz-opt {
  text-align: left;
  padding: 0.38rem 0.6rem;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  background: #fff;
  font-size: 0.8rem;
  cursor: pointer;
}

.quiz-opt.correct {
  background: var(--green-soft);
  border-color: var(--green);
  color: #166534;
  font-weight: 600;
}

.quiz-opt.wrong {
  background: var(--red-soft);
  border-color: var(--red);
  color: #991b1b;
}

.quiz-feedback {
  margin-top: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
}

/* Top Hero Section (above workspace & tabs) */
.intro-hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1d4ed8 100%);
  border-bottom: 1px solid #1e40af;
  color: #f8fafc;
  padding: 0.8rem 1.25rem;
}

.intro-hero-inner {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.intro-hero-copy {
  flex: 1 1 540px;
}

.intro-hero-top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.intro-eyebrow {
  display: inline-block;
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #bfdbfe;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(191, 219, 254, 0.25);
  border-radius: 999px;
  padding: 0.14rem 0.52rem;
}

.intro-hero h3 {
  color: #ffffff;
  font-size: 1.08rem;
  margin: 0 0 0.12rem 0;
}

.intro-hero-slogan {
  font-size: 0.84rem;
  font-style: italic;
  font-weight: 600;
  color: #93c5fd;
  margin-bottom: 0.3rem;
}

.intro-hero p {
  color: #e2e8f0;
  font-size: 0.82rem;
  line-height: 1.4;
  margin: 0;
}

.intro-hero .intro-actions {
  margin-top: 0;
  flex-shrink: 0;
}

.intro-hero .btn-primary {
  background: #38bdf8;
  color: #0f172a;
  border-color: #38bdf8;
  font-weight: 700;
}

.intro-hero .btn-primary:hover {
  background: #7dd3fc;
}

.intro-hero .btn-secondary {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.3);
}

.intro-hero .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.24);
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

@media (max-width: 640px) {
  .intro-grid {
    grid-template-columns: 1fr;
  }
}

.intro-stat {
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 0.55rem 0.75rem;
}

.intro-stat-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.intro-stat-value {
  margin-top: 0.15rem;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--navy);
}

.intro-stat-sub {
  margin-top: 0.1rem;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

/* Scenarios & Missions Tab */
.mission-picker-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  padding: 0.6rem 0.75rem;
  background: #fff;
  border-bottom: 1px solid var(--border-subtle);
}

.picker-field {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1 1 210px;
}

.picker-field .select-micro {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.picker-field select {
  padding: 0.38rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #f8fafc;
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 600;
}

.sm-section-title {
  margin: 0.2rem 0 0.1rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--navy);
}

.sm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
  gap: 0.45rem;
}

.sm-card {
  text-align: left;
  background: #fff;
  border: 1px solid var(--border-subtle);
  border-radius: 9px;
  padding: 0.55rem 0.7rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.sm-card:hover {
  border-color: var(--blue);
  background: #f8fafc;
}

.sm-card.active {
  border-color: var(--blue);
  background: #eff6ff;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.14);
}

.sm-card-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--navy);
}

.sm-card-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.sm-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.3rem;
  margin-top: 0.15rem;
}

.sm-pill {
  font-size: 0.66rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 999px;
  background: #e2e8f0;
  color: var(--text-muted);
}

.sm-card.active .sm-pill {
  background: var(--blue);
  color: #fff;
}