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

:root {
  --bg: #00000a;
  --text: #c8dce8;
  --text-dim: rgba(160, 200, 230, 0.5);
  --accent: #44aaff;
  --accent-dim: rgba(68, 170, 255, 0.15);
  --accent-glow: rgba(68, 170, 255, 0.4);
  --accent2: #ff9944;
  --surface: rgba(2, 8, 22, 0.88);
  --border: rgba(68, 140, 220, 0.18);
  --border-bright: rgba(68, 170, 255, 0.35);
  --radius: 3px;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Share Tech Mono', 'Courier New', monospace;
  -webkit-font-smoothing: antialiased;
}

#canvas {
  display: block;
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* ===================== */
/*        HUD            */
/* ===================== */

#hud {
  position: fixed;
  top: 24px;
  left: 24px;
  width: 230px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10;
  box-shadow: 0 0 40px rgba(0, 10, 40, 0.6), 0 0 0 1px rgba(68, 170, 255, 0.05);
}

.hud-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 2px;
}

.hud-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent), 0 0 16px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

.hud-sep {
  border: none;
  border-top: 1px solid var(--border);
  margin: 12px 0;
}

.hud-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
}

.hud-label {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  min-width: 46px;
}

.hud-value {
  font-size: 11px;
  color: var(--accent2);
  min-width: 38px;
  text-align: right;
}

.hud-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-dim);
  border: 1px solid var(--border-bright);
  color: var(--accent);
  cursor: pointer;
  padding: 7px 14px;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 2px;
  transition: all 0.2s ease;
  width: 100%;
  justify-content: center;
}

.hud-btn:hover {
  background: rgba(68, 170, 255, 0.25);
  box-shadow: 0 0 12px var(--accent-glow);
  border-color: var(--accent);
}

.hud-btn:active {
  transform: scale(0.97);
}

.hud-hint {
  font-size: 9px;
  letter-spacing: 1.2px;
  color: rgba(120, 160, 200, 0.35);
  line-height: 1.8;
}

/* Slider */
.slider-wrap {
  flex: 1;
}

input[type="range"] {
  width: 100%;
  height: 3px;
  -webkit-appearance: none;
  appearance: none;
  background: rgba(68, 140, 220, 0.25);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px;
  height: 13px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-glow);
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

/* Toggle switch */
.toggle-row {
  justify-content: space-between;
}

.toggle-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  cursor: pointer;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
}

.toggle-switch {
  position: relative;
  width: 34px;
  height: 18px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: rgba(68, 140, 220, 0.2);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all 0.25s;
  cursor: pointer;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 12px;
  width: 12px;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--text-dim);
  border-radius: 50%;
  transition: all 0.25s;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent-dim);
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(16px) translateY(-50%);
  background: var(--accent);
}

/* ===================== */
/*     PLANET NAV        */
/* ===================== */

#planet-nav {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 160px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  backdrop-filter: blur(12px);
  z-index: 10;
}

.nav-title {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.nav-planet-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1.5px;
  padding: 5px 4px;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
  text-align: left;
}

.nav-planet-btn:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

.nav-planet-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 4px currentColor;
}

/* ===================== */
/*       TOOLTIP         */
/* ===================== */

#tooltip {
  position: fixed;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--accent);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 30;
  backdrop-filter: blur(6px);
  white-space: nowrap;
}

#tooltip.visible {
  opacity: 1;
}

/* ===================== */
/*       INFO PANEL      */
/* ===================== */

#panel {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(0);
  width: 420px;
  max-width: calc(100vw - 48px);
  background: var(--surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius);
  padding: 24px 28px;
  backdrop-filter: blur(16px);
  z-index: 20;
  transition: opacity 0.3s ease, transform 0.3s ease;
  box-shadow: 0 0 60px rgba(68, 170, 255, 0.08), 0 20px 40px rgba(0, 5, 20, 0.7);
}

#panel.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(16px);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

#panel-type {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--accent2);
  opacity: 0.8;
}

#panel-close {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  cursor: pointer;
  width: 24px;
  height: 24px;
  border-radius: 2px;
  font-family: inherit;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

#panel-close:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#panel-name {
  font-size: 28px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  letter-spacing: 6px;
  color: #fff;
  margin-bottom: 16px;
  text-shadow: 0 0 30px rgba(68, 170, 255, 0.3);
}

.panel-divider {
  height: 1px;
  background: linear-gradient(to right, var(--border-bright), transparent);
  margin-bottom: 16px;
}

#panel-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 20px;
  font-size: 10px;
  letter-spacing: 1.5px;
  line-height: 1.6;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.stat-label {
  color: var(--text-dim);
  font-size: 9px;
  letter-spacing: 2px;
}

.stat-value {
  color: var(--text);
}

/* ===================== */
/*      LOADING          */
/* ===================== */

#loading {
  position: fixed;
  inset: 0;
  background: #00000d;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: opacity 1s ease;
}

#loading.fade-out {
  opacity: 0;
  pointer-events: none;
}

.ld-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.ld-orbit {
  position: relative;
  width: 120px;
  height: 120px;
  margin-bottom: 32px;
}

.ld-sun {
  position: absolute;
  width: 22px;
  height: 22px;
  background: radial-gradient(circle, #fff7aa, #ffaa33, #ff6600);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 20px #ffaa33, 0 0 40px #ff660066;
}

.ld-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid transparent;
  border-top-color: var(--accent);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.ld-ring-1 {
  width: 50px;
  height: 50px;
  border-top-color: rgba(68, 170, 255, 0.8);
  animation: spin 1.2s linear infinite;
}

.ld-ring-2 {
  width: 80px;
  height: 80px;
  border-top-color: rgba(68, 170, 255, 0.5);
  animation: spin 2s linear infinite reverse;
}

.ld-ring-3 {
  width: 110px;
  height: 110px;
  border-top-color: rgba(68, 170, 255, 0.25);
  animation: spin 3s linear infinite;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.ld-title {
  font-size: 28px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  letter-spacing: 12px;
  color: #fff;
  text-shadow: 0 0 30px rgba(68, 170, 255, 0.5);
  margin-bottom: 6px;
}

.ld-sub {
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.ld-bar-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 240px;
}

.ld-bar {
  flex: 1;
  height: 2px;
  background: rgba(68, 170, 255, 0.15);
  border-radius: 1px;
  overflow: hidden;
}

#ld-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  transition: width 0.08s ease;
}

#ld-pct {
  font-size: 10px;
  color: var(--accent);
  min-width: 32px;
  letter-spacing: 1px;
}

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

/* Responsive */
@media (max-width: 600px) {
  #hud { width: 190px; padding: 14px; left: 12px; top: 12px; }
  #planet-nav { display: none; }
  #panel { width: calc(100vw - 24px); }
}