:root {
  --amber: #e8c47a;
  --amber-dim: #a08040;
  --amber-glow: rgba(232, 196, 122, 0.12);
  --amber-ghost: rgba(232, 196, 122, 0.04);
  --panel-bg: rgba(8, 8, 12, 0.55);
  --panel-border: rgba(232, 196, 122, 0.10);
  --text-primary: #c0b8a8;
  --text-secondary: #706858;
  --text-ghost: #3a3428;
}

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

body {
  overflow: hidden;
  background: #000;
  font-family: 'DM Mono', 'Courier New', monospace;
  color: var(--text-primary);
  cursor: crosshair;
}

#viewport {
  display: block;
  width: 100vw;
  height: 100vh;
}

/* ---- Film grain ---- */
#grain {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
}

/* ---- Scanline intro ---- */
#scanline {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--amber) 30%, var(--amber) 70%, transparent 100%);
  box-shadow: 0 0 20px var(--amber), 0 0 60px var(--amber-glow);
  z-index: 200;
  pointer-events: none;
  animation: scanDown 1.8s cubic-bezier(0.25, 0, 0.1, 1) forwards;
  opacity: 0.7;
}

@keyframes scanDown {
  0% { top: 0; opacity: 0.8; }
  80% { opacity: 0.5; }
  100% { top: 100vh; opacity: 0; }
}

/* ---- HUD ---- */
#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 10;
  padding: 24px 28px;
  animation: hudFadeIn 1.2s ease 1.5s both;
}

@keyframes hudFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---- Panel base ---- */
.hud-panel {
  position: relative;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  padding: 16px 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Corner brackets */
.hud-bracket-tl,
.hud-bracket-br {
  position: absolute;
  width: 10px;
  height: 10px;
  pointer-events: none;
}

.hud-bracket-tl {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--amber-dim);
  border-left: 2px solid var(--amber-dim);
}

.hud-bracket-br {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--amber-dim);
  border-right: 2px solid var(--amber-dim);
}

/* Tag labels */
.hud-tag {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.25em;
  color: var(--amber-dim);
  text-transform: uppercase;
  margin-bottom: 10px;
}

/* Divider line */
.hud-divider {
  width: 32px;
  height: 1px;
  background: var(--amber-dim);
  margin: 8px 0;
  opacity: 0.5;
}

/* ---- Identity panel (top-left) ---- */
#hud-id {
  position: absolute;
  top: 24px;
  left: 28px;
  min-width: 200px;
  animation: panelSlideIn 0.8s ease 1.6s both;
}

@keyframes panelSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

#hud-id h1 {
  font-family: 'Syne', sans-serif;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.25em;
  color: var(--amber);
  line-height: 1;
  text-shadow: 0 0 30px var(--amber-glow);
}

.hud-role {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.hud-location {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--text-ghost);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hud-dot {
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber-dim);
  box-shadow: 0 0 6px var(--amber-dim);
  animation: dotPulse 2.5s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ---- Network panel (top-right) ---- */
#hud-net {
  position: absolute;
  top: 24px;
  right: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  min-width: 160px;
  animation: panelSlideIn 0.8s ease 1.8s both;
}

#hud-net a {
  pointer-events: auto;
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 12px;
  font-weight: 300;
  letter-spacing: 0.06em;
  padding: 5px 0;
  transition: color 0.25s, transform 0.25s;
  position: relative;
}

#hud-net a:hover {
  color: var(--amber);
  transform: translateX(4px);
}

.link-arrow {
  color: var(--amber-dim);
  margin-right: 6px;
  font-size: 14px;
  transition: color 0.25s;
}

#hud-net a:hover .link-arrow {
  color: var(--amber);
}

/* ---- Controls (bottom-left) ---- */
#hud-controls {
  position: absolute;
  bottom: 24px;
  left: 28px;
  display: flex;
  gap: 16px;
  align-items: flex-end;
  animation: panelSlideIn 0.8s ease 2.0s both;
}

.key-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  border: 1px solid var(--text-ghost);
  border-radius: 3px;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-ghost);
  background: rgba(255, 255, 255, 0.02);
}

.key-label {
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--text-ghost);
  margin-left: 4px;
}

/* ---- Status (bottom-right) ---- */
#hud-status {
  position: absolute;
  bottom: 24px;
  right: 28px;
  text-align: right;
  animation: panelSlideIn 0.8s ease 2.2s both;
}

.hud-ens {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--amber-dim);
  margin-bottom: 4px;
}

.hud-coords {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--text-ghost);
  font-variant-numeric: tabular-nums;
}

/* ---- Tooltip / Info card ---- */
#tooltip {
  position: fixed;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  color: var(--text-primary);
  font-family: 'DM Mono', 'Courier New', monospace;
  pointer-events: none;
  z-index: 20;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-width: 340px;
  width: max-content;
  transition: opacity 0.3s, transform 0.3s, max-height 0.4s ease, padding 0.3s;
  overflow: hidden;
}

.tooltip-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  white-space: nowrap;
}

.tooltip-icon {
  font-size: 10px;
  transition: color 0.3s;
  animation: tooltipDiamond 1.5s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes tooltipDiamond {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.tooltip-text {
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.tooltip-detail {
  max-height: 0;
  overflow: hidden;
  padding: 0 18px;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s 0.05s, padding 0.3s;
  border-top: 1px solid transparent;
}

.tooltip-detail p {
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}

.tooltip-detail p + p {
  margin-top: 4px;
}

/* Expanded state */
#tooltip.expanded .tooltip-detail {
  max-height: 200px;
  opacity: 1;
  padding: 10px 18px 14px;
  border-top-color: var(--panel-border);
}

#tooltip.expanded {
  width: 340px;
}

#tooltip.hidden {
  opacity: 0;
  transform: translateX(-50%) translateY(8px);
}

#tooltip.hidden .tooltip-detail {
  max-height: 0;
  opacity: 0;
  padding: 0 18px;
}

/* ---- Vignette edge ---- */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0, 0, 0, 0.5) 100%);
}

/* ---- Off-screen indicators ---- */
#indicators {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 8;
}

.indicator {
  position: absolute;
  pointer-events: none;
  transition: opacity 0.3s;
  font-size: 10px;
  filter: blur(0.3px);
}

.indicator-arrow {
  display: block;
  text-shadow: 0 0 8px currentColor, 0 0 16px currentColor;
}

/* ---- Virtual joystick ---- */
#joystick {
  position: fixed;
  z-index: 15;
  width: 100px;
  height: 100px;
  margin-left: -50px;
  margin-top: -50px;
  border-radius: 50%;
  border: 1px solid var(--amber-dim);
  background: rgba(232, 196, 122, 0.04);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
}

#joystick.visible {
  opacity: 1;
}

#joystick-knob {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--amber-dim);
  box-shadow: 0 0 12px var(--amber-glow);
  transition: background 0.15s;
}

/* ---- Mobile responsive ---- */
@media (max-width: 768px) {
  #hud {
    padding: 16px 18px;
  }

  #hud-id {
    top: 16px;
    left: 18px;
    padding: 12px 14px;
    min-width: unset;
  }

  #hud-id h1 {
    font-size: 20px;
    letter-spacing: 0.2em;
  }

  .hud-role { font-size: 10px; }
  .hud-location { font-size: 9px; }

  #hud-net {
    top: 16px;
    right: 18px;
    padding: 12px 14px;
    min-width: unset;
  }

  #hud-net a {
    font-size: 11px;
    padding: 4px 0;
  }

  #hud-controls {
    display: none;
  }

  #hud-status {
    bottom: 16px;
    right: 18px;
  }

  .hud-ens { font-size: 11px; }
  .hud-coords { font-size: 9px; }

  #tooltip {
    bottom: 56px;
    font-size: 11px;
    padding: 8px 14px;
  }
}

@media (max-width: 480px) {
  #hud-id h1 {
    font-size: 16px;
    letter-spacing: 0.15em;
  }

  #hud-net {
    top: auto;
    bottom: 48px;
    right: 18px;
  }

  #hud-net .hud-tag { display: none; }
  #hud-net .hud-bracket-tl,
  #hud-net .hud-bracket-br { display: none; }
  #hud-net {
    background: none;
    border: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
  }

  #hud-net a {
    font-size: 10px;
  }
}

/* Touch devices — hide keyboard hints, show touch hint */
@media (hover: none) and (pointer: coarse) {
  #hud-controls {
    display: none;
  }

  #hud::after {
    content: 'drag to move';
    position: absolute;
    bottom: 16px;
    left: 18px;
    font-size: 9px;
    letter-spacing: 0.1em;
    color: var(--text-ghost);
  }
}