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

:root {
  --bg: #0a0f14;
  --bg-elevated: #111a22;
  --radar-green: #00ff88;
  --radar-green-dim: rgba(0, 255, 136, 0.35);
  --radar-green-faint: rgba(0, 255, 136, 0.08);
  --warn-amber: #ffb020;
  --warn-amber-dim: rgba(255, 176, 32, 0.4);
  --warn-red: #ff4466;
  --warn-red-dim: rgba(255, 68, 102, 0.45);
  --text: #e8f4f0;
  --text-muted: #6b8f7e;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html,
body {
  min-height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
  overflow-x: hidden;
  overflow-y: auto;
}

.app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  padding: calc(1rem + var(--safe-top)) 1rem calc(1rem + var(--safe-bottom));
  background:
    radial-gradient(ellipse 80% 50% at 50% 45%, rgba(0, 255, 136, 0.04) 0%, transparent 70%),
    var(--bg);
}

/* Header */

.header {
  text-align: center;
  flex-shrink: 0;
}

.title {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--radar-green);
  text-shadow: 0 0 20px var(--radar-green-dim);
}

.subtitle {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* Radar stage */

.radar-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 0.5rem 0;
}

.radar {
  position: relative;
  width: min(88vw, 88vh, 420px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(0, 255, 136, 0.06) 0%, transparent 55%),
    var(--bg-elevated);
  border: 2px solid var(--radar-green-dim);
  box-shadow:
    0 0 40px rgba(0, 255, 136, 0.12),
    inset 0 0 60px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}

/* Grid lines */

.radar-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--radar-green-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--radar-green-faint) 1px, transparent 1px);
  background-size: 12.5% 12.5%;
  opacity: 0.6;
}

/* Concentric rings */

.radar-rings {
  position: absolute;
  inset: 0;
}

.ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid var(--radar-green-faint);
}

.ring:nth-child(1) { width: 25%; height: 25%; }
.ring:nth-child(2) { width: 50%; height: 50%; }
.ring:nth-child(3) { width: 75%; height: 75%; }
.ring:nth-child(4) {
  width: 100%;
  height: 100%;
  border-color: var(--radar-green-dim);
}

/* Crosshair */

.radar-crosshair::before,
.radar-crosshair::after {
  content: "";
  position: absolute;
  background: var(--radar-green-faint);
}

.radar-crosshair::before {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.radar-crosshair::after {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

/* Sweep */

.radar-sweep {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    transparent 270deg,
    rgba(0, 255, 136, 0.15) 300deg,
    rgba(0, 255, 136, 0.55) 360deg
  );
  transform-origin: center center;
  will-change: transform;
}

/* Center dot */

.radar-center {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--radar-green);
  box-shadow: 0 0 10px var(--radar-green);
  z-index: 2;
}

/* Blips */

.blips {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.blip {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--radar-green);
  box-shadow: 0 0 8px var(--radar-green);
  transform: translate(-50%, -50%);
  opacity: 0;
  will-change: opacity, transform;
}

.radar.arena-active .blips {
  opacity: 0.35;
}

/* Arena on radar */

.arena-boundary {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 92%;
  height: 92%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 2px dashed var(--radar-green-dim);
  pointer-events: none;
  z-index: 1;
}

.arena-boundary[hidden] {
  display: none;
}

.player-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--radar-green);
  box-shadow: 0 0 12px var(--radar-green);
  transform: translate(-50%, -50%);
  z-index: 3;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.player-dot[hidden] {
  display: none;
}

.player-dot.is-approach {
  background: var(--warn-amber);
  box-shadow: 0 0 14px var(--warn-amber);
}

.player-dot.is-outside {
  background: var(--warn-red);
  box-shadow: 0 0 16px var(--warn-red);
  animation: outside-pulse 1s ease-in-out infinite;
}

@keyframes outside-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  50%      { transform: translate(-50%, -50%) scale(1.15); }
}

/* Arena state on app */

.app.arena-approach {
  background:
    radial-gradient(ellipse 80% 50% at 50% 45%, rgba(255, 176, 32, 0.07) 0%, transparent 70%),
    var(--bg);
}

.app.arena-approach .radar {
  border-color: var(--warn-amber-dim);
  box-shadow:
    0 0 40px rgba(255, 176, 32, 0.15),
    inset 0 0 60px rgba(0, 0, 0, 0.5);
}

.app.arena-outside {
  background:
    radial-gradient(ellipse 80% 50% at 50% 45%, rgba(255, 68, 102, 0.12) 0%, transparent 70%),
    #120a10;
}

.app.arena-outside .title {
  color: var(--warn-red);
  text-shadow: 0 0 20px var(--warn-red-dim);
}

.app.arena-outside .radar {
  border-color: var(--warn-red);
  box-shadow:
    0 0 48px rgba(255, 68, 102, 0.35),
    inset 0 0 60px rgba(0, 0, 0, 0.5);
  animation: radar-alert 1.2s ease-in-out infinite;
}

.app.arena-outside .status-dot {
  background: var(--warn-red);
  animation: status-blink 0.8s ease-in-out infinite;
}

@keyframes radar-alert {
  0%, 100% { box-shadow: 0 0 48px rgba(255, 68, 102, 0.35), inset 0 0 60px rgba(0, 0, 0, 0.5); }
  50%      { box-shadow: 0 0 64px rgba(255, 68, 102, 0.55), inset 0 0 60px rgba(0, 0, 0, 0.5); }
}

.arena-warning {
  margin-top: 0.65rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.arena-warning[hidden] {
  display: none;
}

.arena-warning.is-approach {
  background: rgba(255, 176, 32, 0.12);
  border: 1px solid var(--warn-amber-dim);
  color: var(--warn-amber);
}

.arena-warning.is-outside {
  background: rgba(255, 68, 102, 0.15);
  border: 1px solid var(--warn-red);
  color: var(--warn-red);
}

/* Round controls */

.round-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  width: 100%;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.round-controls[hidden] {
  display: none;
}

.round-btn {
  width: 100%;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--radar-green-dim);
  border-radius: 0.5rem;
  background: rgba(0, 255, 136, 0.08);
  color: var(--radar-green);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.round-btn:active {
  transform: scale(0.98);
}

/* Arena panel */

.arena-panel {
  margin-top: 0.75rem;
  width: 100%;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.arena-modes {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.65rem;
}

.arena-mode {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--radar-green-faint);
  border-radius: 0.4rem;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.arena-mode.is-active {
  border-color: var(--radar-green-dim);
  background: rgba(0, 255, 136, 0.1);
  color: var(--radar-green);
}

.arena-setup[hidden] {
  display: none;
}

.arena-radius-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.arena-radius-value {
  color: var(--radar-green);
  font-variant-numeric: tabular-nums;
}

.arena-radius-input {
  width: 100%;
  margin-bottom: 0.65rem;
  accent-color: var(--radar-green);
}

.arena-action,
.arena-copy {
  display: block;
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--radar-green-dim);
  border-radius: 0.5rem;
  background: rgba(0, 255, 136, 0.08);
  color: var(--radar-green);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.arena-copy {
  width: auto;
  flex-shrink: 0;
  padding: 0.55rem 0.75rem;
  font-size: 0.7rem;
}

.arena-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 0.65rem;
}

.arena-share {
  margin-top: 0.65rem;
}

.arena-share-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.lobby-code {
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  border: 1px solid var(--radar-green-dim);
  border-radius: 0.5rem;
  background: rgba(0, 255, 136, 0.06);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: clamp(1rem, 4.5vw, 1.25rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-align: center;
  color: var(--radar-green);
  text-shadow: 0 0 12px var(--radar-green-dim);
}

.lobby-code-input {
  width: 100%;
  margin-bottom: 0.65rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--radar-green-faint);
  border-radius: 0.5rem;
  background: rgba(0, 0, 0, 0.3);
  color: var(--radar-green);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-align: center;
  text-transform: uppercase;
}

.lobby-code-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: none;
}

.lobby-code-input:focus {
  outline: none;
  border-color: var(--radar-green-dim);
  box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.15);
}

.arena-copy-code {
  margin-top: 0;
}

.arena-panel.is-live {
  display: none;
}

.geo-row.arena-only[hidden] {
  display: none;
}

/* Footer */

.footer {
  flex-shrink: 0;
  text-align: center;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--radar-green);
  animation: status-blink 2s ease-in-out infinite;
}

@keyframes status-blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.3; }
}

/* Geolocation */

.geo-panel {
  margin-top: 0.85rem;
  width: 100%;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.geo-enable {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--radar-green-dim);
  border-radius: 0.5rem;
  background: rgba(0, 255, 136, 0.08);
  color: var(--radar-green);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.geo-enable:hover,
.geo-enable:focus-visible {
  background: rgba(0, 255, 136, 0.14);
  border-color: var(--radar-green);
  outline: none;
}

.geo-enable:active {
  transform: scale(0.98);
}

.geo-enable[hidden] {
  display: none;
}

.geo-data {
  display: grid;
  gap: 0.45rem;
  padding: 0.75rem;
  border: 1px solid var(--radar-green-faint);
  border-radius: 0.5rem;
  background: rgba(0, 0, 0, 0.25);
  text-align: left;
}

.geo-data[hidden] {
  display: none;
}

.geo-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
}

.geo-row dt {
  flex-shrink: 0;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.geo-row dd {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
  font-size: clamp(0.75rem, 3.2vw, 0.85rem);
  font-variant-numeric: tabular-nums;
  color: var(--radar-green);
  text-align: right;
  word-break: break-all;
}

.geo-message {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: #ff6b6b;
  line-height: 1.4;
}

.geo-message[hidden] {
  display: none;
}

.geo-panel.is-tracking .geo-enable {
  display: none;
}

.hint {
  margin-top: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.7;
}

/* Small phones */

@media (max-width: 360px) {
  .app {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .subtitle,
  .hint,
  .geo-row dt {
    font-size: 0.65rem;
  }

  .geo-enable {
    font-size: 0.8rem;
    padding: 0.65rem 0.85rem;
  }
}

/* Landscape phones */

@media (max-height: 500px) and (orientation: landscape) {
  .app {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 1rem;
  }

  .header,
  .footer {
    flex: 0 0 auto;
    width: 30%;
  }

  .radar-stage {
    flex: 0 0 auto;
    padding: 0;
  }

  .radar {
    width: min(55vh, 280px);
  }
}

/* Reduced motion */

@media (prefers-reduced-motion: reduce) {
  .radar-sweep {
    transform: rotate(45deg);
  }

  .status-dot,
  .player-dot.is-outside,
  .app.arena-outside .radar {
    animation: none;
  }
}