@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Orbitron:wght@400;700;900&display=swap');

:root {
  --bg: #050a14;
  --panel: #0a1628;
  --panel2: #0d1f3c;
  --border: #1a3a6a;
  --accent: #00d4ff;
  --accent2: #ff6b35;
  --accent3: #39ff14;
  --warn: #ffcc00;
  --danger: #ff3b3b;
  --text: #c8e0ff;
  --dim: #4a6a9a;
  --mono: 'Share Tech Mono', monospace;
  --display: 'Orbitron', sans-serif;
}

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

body {
  background: transparent;
  color: var(--text);
  font-family: var(--mono);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* STARFIELD */
#stars {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}

/* HEADER */
header {
  position: relative; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 20px;
  background: linear-gradient(90deg, var(--panel) 0%, #081223 100%);
  border-bottom: 1px solid var(--border);
}
header h1 {
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(0,212,255,0.5);
}
header .subtitle {
  font-size: 0.65rem;
  color: var(--dim);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.status-bar {
  display: flex; gap: 20px; align-items: center;
}
.stat {
  display: flex; flex-direction: column; align-items: flex-end;
  font-size: 0.65rem;
}
.stat label { color: var(--dim); letter-spacing: 0.1em; text-transform: uppercase; }
.stat value {
  font-family: var(--display);
  font-size: 0.9rem;
  font-weight: 700;
}
.stat value.ok { color: var(--accent3); }
.stat value.warn { color: var(--warn); }
.stat value.danger { color: var(--danger); }

/* MAIN LAYOUT */
.main {
  position: relative; z-index: 10;
  display: flex; flex: 1; gap: 0;
  overflow: hidden;
  height: calc(100vh - 56px);
}

/* LEFT PANEL */
.left-panel {
  width: 260px; min-width: 260px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow-y: auto; overflow-x: hidden;
  padding: 12px;
  gap: 12px;
}

/* RIGHT PANEL */
.right-panel {
  width: 240px; min-width: 240px;
  background: var(--panel);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column;
  overflow-y: auto; overflow-x: hidden;
  padding: 12px;
  gap: 12px;
}

/* CANVAS AREA */
.canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: transparent;
}

canvas {
  display: block;
  width: 100%; height: 100%;
}

/* PANEL SECTIONS */
.section {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 10px;
}
.section-title {
  font-family: var(--display);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* MODE BUTTONS */
.mode-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
  margin-bottom: 8px;
}
.mode-btn {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  padding: 7px 4px;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s;
  text-align: center;
}
.mode-btn:hover { border-color: var(--accent); color: var(--text); }
.mode-btn.active {
  background: rgba(0,212,255,0.1);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px rgba(0,212,255,0.2);
}
.mode-btn.manual.active { color: var(--accent2); border-color: var(--accent2); background: rgba(255,107,53,0.1); box-shadow: 0 0 10px rgba(255,107,53,0.2); }
.mode-btn.bangbang.active { color: var(--warn); border-color: var(--warn); background: rgba(255,204,0,0.1); box-shadow: 0 0 10px rgba(255,204,0,0.2); }

/* SLIDERS */
.slider-row {
  display: flex; flex-direction: column; gap: 3px;
  margin-bottom: 8px;
}
.slider-label {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.67rem;
}
.slider-label span { color: var(--dim); }
.slider-label value {
  color: var(--accent);
  font-family: var(--display);
  font-size: 0.7rem;
}
input[type=range] {
  -webkit-appearance: none;
  width: 100%; height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(0,212,255,0.6);
  cursor: pointer;
}
input[type=range].orange::-webkit-slider-thumb { background: var(--accent2); box-shadow: 0 0 8px rgba(255,107,53,0.6); }
input[type=range].green::-webkit-slider-thumb { background: var(--accent3); box-shadow: 0 0 8px rgba(57,255,20,0.6); }
input[type=range].warn::-webkit-slider-thumb { background: var(--warn); box-shadow: 0 0 8px rgba(255,204,0,0.6); }
input[type=range]:disabled { opacity: 0.35; cursor: not-allowed; }
input[type=range]:disabled::-webkit-slider-thumb { cursor: not-allowed; }

/* THRUST CONTROL */
.thrust-control {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
#thrustSlider {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 4px;
  height: 60px;
  -webkit-appearance: none;
  background: var(--border);
  border-radius: 2px;
  cursor: pointer;
}
#thrustSlider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px; height: 20px;
  background: var(--accent2);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(255,107,53,0.8);
  cursor: pointer;
}
.thrust-label {
  font-family: var(--display);
  font-size: 0.65rem;
  color: var(--dim);
  letter-spacing: 0.15em;
}
.thrust-value {
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent2);
}
.thrust-bar-wrap {
  width: 100%; height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 4px;
}
.thrust-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent2), #ff9a00);
  border-radius: 4px;
  transition: width 0.05s;
  box-shadow: 0 0 8px rgba(255,107,53,0.5);
}

/* KEYBOARD HINT */
.key-hint {
  display: flex; gap: 6px; justify-content: center; flex-wrap: wrap;
  margin-top: 4px;
}
.key {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 7px;
  font-size: 0.65rem;
  color: var(--dim);
}
.key strong { color: var(--text); }

/* PID DISPLAY */
.pid-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 3px 0;
  font-size: 0.67rem;
  border-bottom: 1px solid rgba(26,58,106,0.4);
}
.pid-row:last-child { border-bottom: none; }
.pid-row label { color: var(--dim); }
.pid-row value { font-family: var(--display); font-size: 0.72rem; color: var(--accent3); }

/* LOG / CHART AREA */
.chart-canvas {
  width: 100%;
  height: 80px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 3px;
  display: block;
}

/* BUTTONS */
.btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 8px 10px;
  cursor: pointer;
  border-radius: 3px;
  transition: all 0.15s;
  width: 100%;
  margin-bottom: 4px;
}
.btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,212,255,0.05); }
.btn.primary {
  border-color: var(--accent3);
  color: var(--accent3);
  background: rgba(57,255,20,0.05);
}
.btn.danger-btn {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(255,59,59,0.05);
}
.btn.danger-btn:hover { background: rgba(255,59,59,0.15); }

/* SCROLLBAR */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--panel); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* LANDING FLASH */
.flash { position: absolute; inset: 0; pointer-events: none; z-index: 20; opacity: 0; transition: opacity 0.3s; }
.flash.show { opacity: 1; animation: flashAnim 0.6s ease-out forwards; }
@keyframes flashAnim {
  0% { background: rgba(57,255,20,0.3); opacity: 1; }
  100% { background: transparent; opacity: 0; }
}

/* CRASH FLASH */
.crash-flash { position: absolute; inset: 0; pointer-events: none; z-index: 20; opacity: 0; }
.crash-flash.show { animation: crashAnim 0.8s ease-out forwards; }
@keyframes crashAnim {
  0% { background: rgba(255,59,59,0.5); opacity: 1; }
  100% { background: transparent; opacity: 0; }
}

/* OVERLAY */
.overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: rgba(5,10,20,0.85);
  z-index: 30;
  gap: 12px;
}
.overlay h2 {
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: 0.2em;
}
.overlay h2.success { color: var(--accent3); text-shadow: 0 0 30px rgba(57,255,20,0.5); }
.overlay h2.fail { color: var(--danger); text-shadow: 0 0 30px rgba(255,59,59,0.5); }
.overlay p { font-size: 0.8rem; color: var(--dim); letter-spacing: 0.1em; }
.overlay .restart-btn {
  background: var(--panel2); border: 1px solid var(--accent); color: var(--accent);
  font-family: var(--display); font-size: 0.75rem; letter-spacing: 0.2em;
  padding: 10px 24px; cursor: pointer; border-radius: 3px;
  margin-top: 8px;
  transition: all 0.15s;
}
.overlay .restart-btn:hover { background: rgba(0,212,255,0.1); box-shadow: 0 0 20px rgba(0,212,255,0.3); }
.hidden { display: none !important; }

/* tooltip */
.tooltip { font-size: 0.6rem; color: var(--dim); margin-top: 2px; line-height: 1.4; }

.divider { border: none; border-top: 1px solid var(--border); margin: 2px 0; }

select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 5px 8px;
  border-radius: 3px;
  width: 100%;
  cursor: pointer;
  outline: none;
  margin-bottom: 6px;
}
select:focus { border-color: var(--accent); }

.pid-formula {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
  font-size: 0.65rem;
  color: var(--dim);
  line-height: 1.7;
  margin-bottom: 6px;
}
.pid-formula .hl { color: var(--accent); }
.pid-formula .hl2 { color: var(--accent2); }
.pid-formula .hl3 { color: var(--accent3); }

.setpoint-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 6px;
}
.setpoint-row label { font-size: 0.67rem; color: var(--dim); white-space: nowrap; }
.setpoint-row input[type=number] {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--display);
  font-size: 0.75rem;
  padding: 4px 8px;
  border-radius: 3px;
  width: 70px;
  outline: none;
}

.legend { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.legend-item { display: flex; align-items: center; gap: 4px; font-size: 0.6rem; color: var(--dim); }
.legend-dot { width: 8px; height: 3px; border-radius: 1px; }

/* First-order dynamics toggle */
.dynamics-toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
}
.toggle-switch {
  position: relative; width: 36px; height: 18px; cursor: pointer;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute; inset: 0;
  background: var(--border);
  border-radius: 9px;
  transition: background 0.2s;
}
.toggle-switch input:checked + .toggle-track { background: rgba(0,212,255,0.4); border: 1px solid var(--accent); }
.toggle-knob {
  position: absolute; top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: var(--dim);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}
.toggle-switch input:checked ~ .toggle-knob { transform: translateX(18px); background: var(--accent); box-shadow: 0 0 6px rgba(0,212,255,0.7); }
.dynamics-label { font-size: 0.7rem; color: var(--text); }
.dynamics-badge {
  font-size: 0.58rem;
  background: rgba(0,212,255,0.12);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 3px;
  padding: 1px 5px;
  display: none;
}
.dynamics-badge.on { display: inline; }

/* Thrust lag indicator bar */
.dual-bar-wrap {
  width: 100%; height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: visible;
  margin-top: 4px;
  position: relative;
}
.dual-bar-commanded {
  position: absolute; top: 0; left: 0;
  height: 100%;
  background: rgba(255,107,53,0.25);
  border-radius: 4px;
  transition: width 0.05s;
}
.dual-bar-realized {
  position: absolute; top: 0; left: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent2), #ff9a00);
  border-radius: 4px;
  box-shadow: 0 0 8px rgba(255,107,53,0.5);
  transition: width 0.05s;
}