:root {
  --bg-primary: #071322;
  --bg-secondary: #0b1d34;
  --bg-panel: #102644;
  --bg-panel-hover: #153158;
  --border-color: #1a3c68;
  --border-bright: #255594;
  
  --text-main: #f0f4f8;
  --text-muted: #8ba2c0;
  --accent-cyan: #00e5ff;
  --accent-blue: #29b6f6;
  --accent-green: #00e676;
  --accent-orange: #ff9100;
  --accent-red: #ff5252;
  --accent-gold: #ffd600;

  --font-mono: 'SF Mono', 'Roboto Mono', 'Cascadia Code', Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  height: 52px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 10;
}

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

.brand-title h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: #ffffff;
}

.brand-title .badge {
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.12);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

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

.btn-header {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 5px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-header:hover {
  background: var(--bg-panel-hover);
  border-color: var(--border-bright);
}

.btn-header.active {
  background: rgba(0, 229, 255, 0.2);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-header.paused,
.btn-canvas-quick.paused {
  background: rgba(255, 214, 0, 0.25) !important;
  border-color: #ffd600 !important;
  color: #ffd600 !important;
  box-shadow: 0 0 12px rgba(255, 214, 0, 0.5) !important;
  animation: pulse-pause 1.8s infinite ease-in-out;
}

@keyframes pulse-pause {
  0%, 100% { box-shadow: 0 0 8px rgba(255, 214, 0, 0.4); }
  50% { box-shadow: 0 0 16px rgba(255, 214, 0, 0.85); }
}

.key-badge {
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.16);
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 4px;
  color: var(--accent-cyan);
  font-weight: 700;
}

/* Main Container Layout */
.app-main {
  flex: 1;
  display: flex;
  position: relative;
  overflow: hidden;
}

/* Sidebars */
.sidebar {
  width: 320px;
  background: var(--bg-secondary);
  border-color: var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 5;
}

.sidebar-left {
  border-right: 1px solid var(--border-color);
}

.sidebar-right {
  width: 340px;
  border-left: 1px solid var(--border-color);
}

.panel-card {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.panel-title {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-blue);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Controls */
.control-group {
  margin-bottom: 12px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.control-value {
  color: var(--text-main);
  font-weight: 600;
  font-family: var(--font-mono);
}

input[type="range"] {
  width: 100%;
  height: 8px;
  background: #06111f;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  accent-color: var(--accent-cyan);
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid #ffffff;
  cursor: pointer;
  box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
}

.button-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
  margin-top: 8px;
}

.btn-action {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-action:hover {
  background: var(--bg-panel-hover);
  border-color: var(--accent-blue);
}

.btn-action.small {
  padding: 5px 6px;
  font-size: 0.72rem;
  text-align: center;
}

/* Steering Wheel Widget */
.wheel-widget-container {
  display: flex;
  align-items: center;
  gap: 14px;
  background: #071629;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 12px;
  margin-bottom: 8px;
}

.helm-wheel-svg-wrap {
  cursor: ew-resize;
  flex-shrink: 0;
  touch-action: none;
}

.helm-wheel-svg-wrap:active {
  cursor: grabbing;
}

.wheel-readout-wrap {
  display: flex;
  flex-direction: column;
}

.wheel-angle-text {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.wheel-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.3;
}

/* On-Canvas Quick View Navigation Bar */
.canvas-quick-bar,
.canvas-view-shortcuts {
  position: absolute;
  top: 74px;
  left: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 8;
}

.btn-canvas-quick,
.btn-canvas-view {
  background: rgba(7, 22, 41, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-bright);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn-canvas-quick:hover,
.btn-canvas-view:hover {
  background: var(--bg-panel-hover);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 229, 255, 0.4);
}

.btn-canvas-quick:active,
.btn-canvas-view:active {
  transform: scale(0.97);
  background: rgba(0, 229, 255, 0.25);
}

/* Central Viewport & Canvas */
.viewport-center {
  flex: 1;
  position: relative;
  background: #0a233a;
  overflow: hidden;
}

#sim-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Floated Coach Banner */
.coach-banner {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(11, 29, 52, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-bright);
  border-radius: 8px;
  padding: 10px 18px;
  max-width: 650px;
  width: 90%;
  font-size: 0.85rem;
  line-height: 1.4;
  color: #e2e8f0;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  pointer-events: none;
  z-index: 6;
  text-align: center;
}

.coach-banner strong {
  color: var(--accent-gold);
}

/* Floated Line Action Banner */
.line-status-banner {
  position: absolute;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(16, 38, 68, 0.95);
  border: 1px solid var(--accent-green);
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 0.82rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  z-index: 6;
  transition: opacity 0.2s;
}

.line-status-banner.hidden {
  display: none;
}

.prompt-glow {
  color: #bbf7d0;
}

.success-glow {
  color: var(--accent-green);
  font-weight: 600;
}

/* Floated Multi-Function Display (MFD) HUD */
.hud-mfd-container {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(11, 29, 52, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-bright);
  border-radius: 8px;
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 20px;
  z-index: 6;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
}

.mfd-gauge {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.mfd-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.8px;
  margin-bottom: 2px;
}

.mfd-value {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
}

.gear-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}

.gear-badge.fwd {
  background: rgba(0, 230, 118, 0.2);
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
}

.gear-badge.neutral {
  background: rgba(255, 214, 0, 0.15);
  color: var(--accent-gold);
  border: 1px solid var(--accent-gold);
}

.gear-badge.rev {
  background: rgba(255, 82, 82, 0.2);
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
}

/* Rudder Bar Indicator */
.rudder-indicator-wrap {
  width: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.rudder-bar-track {
  width: 100%;
  height: 6px;
  background: #06111f;
  border-radius: 3px;
  position: relative;
  overflow: hidden;
  margin-top: 4px;
}

.rudder-bar-track::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #ffffff;
  transform: translateX(-50%);
  z-index: 2;
}

#hud-rudder-bar {
  position: absolute;
  top: 0;
  bottom: 0;
  background: var(--accent-green);
  transition: width 0.05s ease, left 0.05s ease;
}

/* Active Mooring Lines Card List */
.active-lines-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
  margin-bottom: 10px;
}

.empty-lines-state {
  text-align: center;
  padding: 16px 8px;
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.4;
  border: 1px dashed var(--border-color);
  border-radius: 6px;
}

.line-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  transition: border-color 0.15s;
}

.line-card.taut {
  border-left: 3px solid var(--accent-orange);
}

.line-card.slack {
  border-left: 3px solid #78909c;
}

.line-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.line-title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-main);
}

.btn-cast-off {
  background: rgba(255, 82, 82, 0.15);
  border: 1px solid rgba(255, 82, 82, 0.4);
  color: var(--accent-red);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.7rem;
  cursor: pointer;
}

.btn-cast-off:hover {
  background: var(--accent-red);
  color: #ffffff;
}

.line-controls-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.length-adjuster {
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-step {
  background: #06111f;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 22px;
  height: 22px;
  border-radius: 3px;
  cursor: pointer;
  font-weight: 700;
}

.length-val {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  min-width: 44px;
  text-align: center;
}

.tension-display {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  width: 90px;
}

.tension-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
}

.tension-bar-track {
  width: 100%;
  height: 4px;
  background: #06111f;
  border-radius: 2px;
  overflow: hidden;
  margin-top: 3px;
}

.tension-bar-fill {
  height: 100%;
  background: var(--accent-green);
  transition: width 0.1s;
}

.tension-display.warning .tension-bar-fill {
  background: var(--accent-orange);
}

.tension-display.critical .tension-bar-fill {
  background: var(--accent-red);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay.hidden {
  display: none;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid var(--border-bright);
  border-radius: 8px;
  width: 620px;
  max-width: 92vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.modal-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  font-size: 1.1rem;
  color: var(--accent-cyan);
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
}

.modal-body {
  padding: 18px;
  overflow-y: auto;
  font-size: 0.86rem;
  line-height: 1.6;
  color: #cbd5e1;
}

.modal-body h3 {
  color: var(--accent-gold);
  font-size: 0.95rem;
  margin: 14px 0 6px;
}

.modal-body ul {
  padding-left: 20px;
  margin-bottom: 10px;
}

.modal-body li {
  margin-bottom: 4px;
}

.key-badge {
  background: #06111f;
  border: 1px solid var(--border-bright);
  padding: 1px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #ffffff;
}

select.select-styled {
  width: 100%;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  outline: none;
  cursor: pointer;
}

select.select-styled:focus {
  border-color: var(--accent-cyan);
}