@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@500;600;700&display=swap');

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

:root {
  /* Scientific Dark Navy Palette */
  --bg-space: #070b14;
  --bg-viewport: #090e1a;
  --bg-sidebar: #0b1120;
  --bg-card: #0f172a;
  --bg-card-glass: rgba(15, 23, 42, 0.75);
  --bg-input: #131d33;
  
  /* Subtle Scientific Borders */
  --border-subtle: rgba(148, 163, 184, 0.12);
  --border-focus: rgba(56, 189, 248, 0.45);
  --border-card: rgba(255, 255, 255, 0.06);

  /* Precise Color Coding */
  --accent-cyan: #38bdf8;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #a855f7;

  /* Typography */
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  /* Geometry & Shadows */
  --radius-lg: 14px;
  --radius-md: 8px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 20px -2px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 20px rgba(56, 189, 248, 0.2);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background-color: var(--bg-space);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

/* ============================================================================
   APPLICATION ROOT LAYOUT (DESKTOP: SPLIT VIEWPORT & SIDEBAR)
   ============================================================================ */
#app {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background-color: var(--bg-space);
}

/* 1. Left Viewport: Large 3D Simulation */
#simulation-viewport {
  flex: 1 1 0;
  min-width: 0;
  height: 100%;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-viewport);
}

#canvas-container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

#canvas-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

/* 2. Floating Minimal Viewport HUD Overlay */
#viewport-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 18px 24px;
}

.hud-top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: auto;
}

.hud-state-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.hud-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.hud-state-pill.state-holding .hud-pulse-dot { background-color: var(--accent-cyan); box-shadow: 0 0 8px var(--accent-cyan); }
.hud-state-pill.state-aiming .hud-pulse-dot { background-color: var(--accent-amber); box-shadow: 0 0 10px var(--accent-amber); }
.hud-state-pill.state-throwing .hud-pulse-dot { background-color: var(--accent-rose); box-shadow: 0 0 12px var(--accent-rose); animation: pulse 0.8s infinite alternate; }
.hud-state-pill.state-landed .hud-pulse-dot { background-color: var(--accent-emerald); box-shadow: 0 0 8px var(--accent-emerald); }

@keyframes pulse {
  from { opacity: 0.5; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1.15); }
}

.hud-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hud-cam-modes {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
  gap: 2px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hud-cam-btn {
  background: transparent;
  border: none;
  color: var(--text-sub);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  padding: 5px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.hud-cam-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.08);
}

.hud-cam-btn.active {
  background: var(--accent-cyan);
  color: #070b14;
  font-weight: 700;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

.hud-cam-btn.reset {
  color: var(--accent-purple);
}
.hud-cam-btn.reset:hover {
  background: rgba(168, 85, 247, 0.15);
  color: #ffffff;
}

.hud-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-sub);
  transition: all 0.2s ease;
}

.hud-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

.hud-toggle input {
  display: none;
}

.hud-toggle-slider {
  position: relative;
  width: 28px;
  height: 16px;
  border-radius: 999px;
  background-color: rgba(255, 255, 255, 0.15);
  transition: all 0.2s ease;
}

.hud-toggle-slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ffffff;
  transition: all 0.2s ease;
}

.hud-toggle input:checked + .hud-toggle-slider {
  background-color: var(--accent-cyan);
}

.hud-toggle input:checked + .hud-toggle-slider::after {
  transform: translateX(12px);
}

.hud-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-card-glass);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-sub);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.hud-btn:hover {
  background: rgba(30, 41, 59, 0.85);
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

/* Floating Throw Power Meter */
.hud-power-meter {
  align-self: center;
  margin-top: auto;
  margin-bottom: 20px;
  width: 100%;
  max-width: 440px;
  background: var(--bg-card-glass);
  border: 1px solid rgba(245, 158, 11, 0.4);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  pointer-events: auto;
}

.hud-power-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.hud-power-title {
  color: var(--accent-amber);
}

.hud-power-val {
  font-family: var(--font-mono);
  color: #ffffff;
}

.hud-power-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.hud-power-bar {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #f59e0b, #f43f5e);
  border-radius: 999px;
  transition: width 0.05s linear;
}

.hud-power-hint {
  margin-top: 8px;
  font-size: 10.5px;
  color: var(--text-sub);
  text-align: center;
}

/* Floating Simulation Progress Card */
.hud-progress-card {
  align-self: center;
  margin-top: auto;
  margin-bottom: 20px;
  width: 100%;
  max-width: 460px;
  background: var(--bg-card-glass);
  border: 1px solid rgba(56, 189, 248, 0.35);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  pointer-events: auto;
}

.hud-progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
}

.hud-progress-title {
  color: var(--accent-cyan);
}

.hud-progress-stats {
  font-family: var(--font-mono);
  color: #ffffff;
}

.hud-progress-track {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}

.hud-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.8);
  border-radius: 999px;
  transition: width 0.05s linear;
}

/* ============================================================================
   RIGHT SIDEBAR: CONTROLS & PHYSICS DATA
   ============================================================================ */
#sidebar-panel {
  width: 440px;
  flex-shrink: 0;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  background-color: var(--bg-sidebar);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
}

#ui-container {
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Header Branding */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.header-badge {
  display: inline-block;
  align-self: flex-start;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 2px 7px;
  border-radius: 4px;
}

.app-title {
  font-size: 19px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.3px;
}

.app-subtitle {
  font-size: 11.5px;
  color: var(--text-sub);
}

/* Mode Navigation Tabs */
.app-nav-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background: var(--bg-card);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-sub);
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab.active {
  background: rgba(56, 189, 248, 0.14);
  color: var(--accent-cyan);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.nav-tab:hover:not(.active) {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.04);
}

/* Tab Views Container */
.tab-view {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ============================================================================
   CLEAN SCIENTIFIC CARDS & CONTROLS
   ============================================================================ */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-card);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.card-icon {
  font-size: 14px;
}

.card-title {
  font-size: 13.5px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.2px;
  flex: 1;
}

.card-desc {
  font-size: 11.5px;
  color: var(--text-sub);
  line-height: 1.5;
  margin-bottom: 12px;
}

/* Primary Action Card */
.action-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-color: rgba(56, 189, 248, 0.25);
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.95), rgba(11, 17, 32, 0.98));
}

.btn-simulate {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  border: none;
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  color: #ffffff;
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.8px;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(2, 132, 199, 0.4);
  transition: all 0.2s ease;
}

.btn-simulate:hover:not(:disabled) {
  background: linear-gradient(135deg, #0369a1, #0284c7);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.5);
  transform: translateY(-1px);
}

.btn-simulate.disabled-simulating {
  background: #1e293b;
  color: #64748b;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.action-secondary-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.btn-secondary, .btn-accent, .btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: #ffffff;
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.14);
}

.btn-accent {
  background: rgba(244, 63, 94, 0.18);
  border: 1px solid rgba(244, 63, 94, 0.4);
  color: #f43f5e;
}

.btn-accent:hover:not(:disabled) {
  background: rgba(244, 63, 94, 0.28);
}

.btn-accent:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-sub);
}

.btn-outline:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.05);
  color: #ffffff;
}

/* Parameter Rows */
.param-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.param-row:last-child {
  margin-bottom: 0;
}

.param-label-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-sub);
}

.input-with-unit {
  display: inline-flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  gap: 4px;
}

.input-with-unit:focus-within {
  border-color: var(--border-focus);
}

.num-input {
  width: 50px;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: #ffffff;
  text-align: right;
}

.num-input-sm {
  width: 44px;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #ffffff;
  text-align: right;
}

.unit-text {
  font-size: 11px;
  color: var(--text-muted);
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px rgba(56, 189, 248, 0.6);
  cursor: pointer;
  transition: transform 0.1s;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.range-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 9.5px;
  color: var(--text-muted);
}

/* Preset Pill Row */
.preset-pill-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-top: 6px;
}

.btn-preset {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 4px 2px;
  font-size: 10px;
  color: var(--text-sub);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s ease;
}

.btn-preset:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  color: #ffffff;
}

/* ============================================================================
   TELEMETRY & DATA VISUALIZATION
   ============================================================================ */
.badge-status {
  font-size: 9.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-status.aiming {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-amber);
  border-color: rgba(245, 158, 11, 0.3);
}

.badge-status.simulating {
  background: rgba(244, 63, 94, 0.15);
  color: var(--accent-rose);
  border-color: rgba(244, 63, 94, 0.35);
}

.badge-status.landed {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.35);
}

/* Hero Metrics */
.telemetry-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.telemetry-hero-box {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
}

.telemetry-hero-box.cyan { border-color: rgba(56, 189, 248, 0.25); }
.telemetry-hero-box.emerald { border-color: rgba(16, 185, 129, 0.25); }

.hero-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-sub);
}

.hero-val-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 3px 0;
}

.hero-num {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  color: #ffffff;
}

.hero-unit {
  font-size: 11px;
  color: var(--text-muted);
}

.hero-desc {
  font-size: 9.5px;
  color: var(--text-muted);
}

/* Telemetry Groups */
.telemetry-group {
  margin-bottom: 10px;
}

.group-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text-sub);
  margin-bottom: 5px;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.dot.cyan { background-color: var(--accent-cyan); }
.dot.emerald { background-color: var(--accent-emerald); }
.dot.rose { background-color: var(--accent-rose); }
.dot.amber { background-color: var(--accent-amber); }
.dot.purple { background-color: var(--accent-purple); }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.data-box {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  display: flex;
  flex-direction: column;
}

.data-box.highlight {
  border-color: rgba(56, 189, 248, 0.3);
  background: rgba(56, 189, 248, 0.05);
}

.data-box.highlight-vy {
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.05);
}

.data-label {
  font-size: 9.5px;
  color: var(--text-muted);
}

.data-val {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  color: #ffffff;
}

.data-unit {
  font-size: 9px;
  color: var(--text-muted);
  align-self: flex-end;
  margin-top: -14px;
}

/* Totals Summary Row */
.totals-summary-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.totals-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 10px;
}

.totals-box.purple { border-color: rgba(168, 85, 247, 0.3); }
.totals-box.cyan { border-color: rgba(56, 189, 248, 0.3); }

.totals-label {
  font-size: 10px;
  color: var(--text-sub);
}

.totals-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
}

/* Landed Results Card */
.landed-freeze-card {
  margin-top: 12px;
  padding: 12px;
  border-radius: var(--radius-md);
  background: rgba(16, 185, 129, 0.06);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.freeze-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.badge-landed {
  font-size: 10px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent-emerald);
  color: #0b1120;
}

.freeze-title {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
}

.freeze-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  font-size: 11px;
}

.freeze-item.full {
  grid-column: span 2;
}

.freeze-label {
  color: var(--text-sub);
}

.freeze-val {
  font-family: var(--font-mono);
  color: #ffffff;
  font-weight: 600;
  margin-left: 4px;
}

.freeze-val.highlight {
  color: var(--accent-cyan);
}

.freeze-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.btn-simulate-sm, .btn-outline-sm {
  flex: 1;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}

.btn-simulate-sm {
  background: var(--accent-emerald);
  border: none;
  color: #0b1120;
}

.btn-outline-sm {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: #ffffff;
}

/* ============================================================================
   LEGEND & EDUCATIONAL CARDS
   ============================================================================ */
.legend-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legend-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 4px;
  flex-shrink: 0;
}

.legend-dot.cyan { background: var(--accent-cyan); box-shadow: 0 0 6px var(--accent-cyan); }
.legend-dot.emerald { background: var(--accent-emerald); box-shadow: 0 0 6px var(--accent-emerald); }
.legend-dot.rose { background: var(--accent-rose); box-shadow: 0 0 6px var(--accent-rose); }
.legend-dot.amber { background: var(--accent-amber); box-shadow: 0 0 6px var(--accent-amber); }
.legend-dot.purple { background: var(--accent-purple); box-shadow: 0 0 6px var(--accent-purple); }

.legend-content {
  display: flex;
  flex-direction: column;
}

.legend-name {
  font-size: 11.5px;
  font-weight: 700;
  color: #ffffff;
}

.legend-desc {
  font-size: 10.5px;
  color: var(--text-muted);
}

/* Educational Formula Card */
.edu-card {
  border-color: rgba(168, 85, 247, 0.22);
}

.formula-box {
  background: var(--bg-input);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-cyan);
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.formula-line.highlight {
  color: var(--accent-amber);
  font-weight: 700;
}

.edu-text {
  font-size: 11px;
  color: var(--text-sub);
  line-height: 1.5;
}

/* ============================================================================
   EDUCATIONAL EXPERIMENT MODE STYLES
   ============================================================================ */
.exp-preset-selector {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.btn-exp-preset {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  transition: all 0.2s ease;
}

.btn-exp-preset:hover {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

.btn-exp-preset.active {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.15);
}

.exp-name {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
}

.exp-sub {
  font-size: 10.5px;
  color: var(--text-sub);
}

.exp-constants-wrap {
  margin-bottom: 8px;
}

.exp-constant-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
}

.constant-label {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-sub);
}

.exp-constant-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
  font-size: 11px;
}

.badge-fixed {
  font-size: 10px;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 4px;
  color: var(--text-sub);
  margin-left: auto;
}

/* Data Table */
.table-container {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
}

.data-table th {
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-weight: 600;
}

.data-table td {
  padding: 6px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.table-color-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.num-cell {
  font-family: var(--font-mono);
}

.num-cell.purple { color: var(--accent-purple); font-weight: 700; }
.num-cell.cyan { color: var(--accent-cyan); font-weight: 700; }

.mt-3 {
  margin-top: 12px;
}

/* ============================================================================
   CAMERA PERSPECTIVES & CHALLENGE MODE STYLES
   ============================================================================ */
.camera-card {
  margin-top: -4px;
}

.camera-pill-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.btn-cam {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-sub);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  padding: 8px 4px;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}

.btn-cam:hover {
  border-color: var(--accent-cyan);
  color: var(--text-main);
}

.btn-cam.active {
  background: rgba(56, 189, 248, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 700;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.25);
}

/* Challenge Mode Layout & Styles */
.challenge-target-card {
  background: linear-gradient(180deg, rgba(245, 158, 11, 0.08) 0%, rgba(15, 23, 42, 0.8) 100%);
  border-color: rgba(245, 158, 11, 0.25);
}

.badge-challenge {
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(245, 158, 11, 0.18);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.ch-target-display {
  text-align: center;
  padding: 16px 8px;
  background: rgba(0, 0, 0, 0.25);
  border-radius: var(--radius-md);
  border: 1px solid rgba(245, 158, 11, 0.2);
  margin-bottom: 12px;
}

.ch-target-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-amber);
  text-transform: uppercase;
}

.ch-target-val {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  color: #ffffff;
  margin-top: 4px;
  text-shadow: 0 0 20px rgba(245, 158, 11, 0.35);
}

.ch-target-val .unit {
  font-size: 14px;
  color: var(--text-sub);
  font-weight: 500;
}

.ch-difficulty-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
}

.btn-ch-diff {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-sub);
  font-family: var(--font-sans);
  font-size: 10.5px;
  font-weight: 600;
  padding: 7px 4px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: all 0.2s ease;
}

.btn-ch-diff:hover {
  border-color: var(--accent-amber);
  color: var(--text-main);
}

.btn-ch-diff.active {
  background: rgba(245, 158, 11, 0.18);
  border-color: var(--accent-amber);
  color: var(--accent-amber);
  font-weight: 700;
}

.physics-helper-card {
  border-color: rgba(56, 189, 248, 0.15);
}

.formula-box {
  background: rgba(0, 0, 0, 0.25);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent-cyan);
}

.formula-title {
  font-size: 10.5px;
  color: var(--text-sub);
  font-weight: 600;
}

.formula-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-cyan);
  font-weight: 700;
  margin: 4px 0 6px;
}

.formula-tip {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
}

.formula-tip strong {
  color: var(--text-main);
}

.formula-tip code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.08);
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 10.5px;
}

.challenge-score-card {
  border-color: rgba(168, 85, 247, 0.2);
}

.badge-points {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(168, 85, 247, 0.18);
  color: var(--accent-purple);
  border: 1px solid rgba(168, 85, 247, 0.3);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.score-item {
  background: rgba(0, 0, 0, 0.25);
  padding: 8px;
  border-radius: var(--radius-sm);
  text-align: center;
  border: 1px solid var(--border-card);
}

.s-label {
  display: block;
  font-size: 9.5px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.s-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 2px;
}

.ch-feedback-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  text-align: center;
}

.ch-result-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  padding: 5px 12px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.ch-result-badge.ready {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-sub);
  border: 1px solid var(--border-subtle);
}

.ch-result-badge.zone-bullseye {
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent-amber);
  border: 1px solid var(--accent-amber);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.4);
}

.ch-result-badge.zone-great {
  background: rgba(6, 182, 212, 0.2);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

.ch-result-badge.zone-close {
  background: rgba(168, 85, 247, 0.2);
  color: var(--accent-purple);
  border: 1px solid var(--accent-purple);
}

.ch-result-badge.zone-miss {
  background: rgba(244, 63, 94, 0.2);
  color: var(--accent-rose);
  border: 1px solid var(--accent-rose);
}

.ch-error-row {
  display: flex;
  justify-content: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-sub);
  margin-bottom: 6px;
}

.error-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-main);
}

.ch-feedback-text {
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--text-sub);
}

/* ============================================================================
   RESPONSIVE DESIGN (MOBILE LAYOUT: 3D FIRST, CONTROLS BELOW, RESULTS BELOW)
   ============================================================================ */
@media (max-width: 1023px) {
  #app {
    flex-direction: column;
    height: auto;
    min-height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
  }

  /* 3D Simulation Viewport comes FIRST */
  #simulation-viewport {
    width: 100%;
    height: 48vh;
    min-height: 320px;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
  }

  #viewport-hud {
    padding: 12px 14px;
  }

  /* Sidebar with controls & results comes BELOW */
  #sidebar-panel {
    width: 100%;
    height: auto;
    overflow: visible;
    border-left: none;
    border-top: 1px solid var(--border-subtle);
  }

  #ui-container {
    padding: 16px 14px;
  }

  .hud-top-bar {
    flex-wrap: wrap;
    gap: 8px;
  }

  .hud-actions {
    flex-wrap: wrap;
    gap: 6px;
  }

  .hud-cam-btn {
    padding: 4px 7px;
    font-size: 10px;
  }
}

@media (max-width: 480px) {
  .hud-state-pill {
    padding: 4px 10px;
    font-size: 10px;
  }
  .hud-cam-btn {
    padding: 4px 6px;
    font-size: 9.5px;
  }
  .camera-pill-row, .ch-difficulty-row {
    grid-template-columns: repeat(2, 1fr);
  }
}