@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Syne:wght@400;600;700;800&display=swap');

:root {
  --bg: #080b10;
  --panel: #0d1117;
  --panel2: #111520;
  --border: #1e2535;
  --border2: #2a3247;
  --accent: #4f8ef7;
  --accent2: #2d5cc4;
  --success: #10c97e;
  --danger: #f05050;
  --amber: #f59e0b;
  --text: #c8d4e8;
  --text-dim: #5a6882;
  --text-mid: #8899b8;
  --mono: 'Share Tech Mono', monospace;
  --sans: 'Syne', system-ui, sans-serif;
}

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

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 10px;
  gap: 10px;
}

/* ── Header ── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
  flex-shrink: 0;
}
.logo {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-badge {
  font-size: 0.6rem;
  background: var(--accent);
  color: #fff;
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.header-status {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  display: flex;
  gap: 20px;
}
.status-dot {
  display: flex;
  align-items: center;
  gap: 5px;
}
.status-dot::before {
  content: '';
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--success);
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink { 0%,100%{opacity:0.4} 50%{opacity:1} }

/* ── Layout ── */
.main {
  display: grid;
  grid-template-columns: 270px 1fr;
  gap: 10px;
  flex: 1;
  min-height: 0;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}

/* ── Panels ── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
}

.panel-title {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.panel-title-accent { color: var(--accent); }

/* ── Controls ── */
.ctrl { margin-bottom: 7px; }
.ctrl label {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-mid);
  margin-bottom: 3px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.ctrl label .val {
  font-family: var(--mono);
  color: #fff;
  font-size: 0.65rem;
  background: var(--panel2);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--border2);
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%; height: 3px;
  background: var(--border2);
  border-radius: 2px;
  outline: none;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
}
input[type=range]:hover { background: #2d3650; }

select {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border2);
  color: var(--text);
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-family: var(--sans);
  outline: none;
  margin-bottom: 6px;
}

/* ── Buttons ── */
.btn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 6px; }
button {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 8px;
  border-radius: 7px;
  border: 1px solid var(--border2);
  background: var(--panel2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  text-transform: uppercase;
}
button:hover { background: var(--border2); transform: translateY(-1px); }
button:active { transform: translateY(0); }
button.btn-primary {
  background: var(--accent);
  border-color: var(--accent2);
  color: #fff;
}
button.btn-primary:hover { background: var(--accent2); box-shadow: 0 0 14px rgba(79,142,247,0.3); }
button.btn-danger { color: var(--danger); border-color: rgba(240,80,80,0.25); background: rgba(240,80,80,0.08); }
button.btn-danger:hover { background: rgba(240,80,80,0.15); }
button.btn-success { color: var(--success); border-color: rgba(16,201,126,0.25); background: rgba(16,201,126,0.08); }
button.btn-success:hover { background: rgba(16,201,126,0.15); }
button.btn-wide { grid-column: 1/-1; }
button.btn-active { background: var(--success) !important; border-color: var(--success) !important; color: #fff !important; }

/* ── Toggles ── */
.toggle-row { display: flex; align-items: center; gap: 7px; margin-bottom: 5px; font-size: 0.7rem; color: var(--text-mid); cursor: pointer; }
.toggle-row input[type=checkbox] { accent-color: var(--accent); width: 12px; height: 12px; cursor: pointer; }

/* ── Physics box ── */
.physics-box {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  background: var(--bg);
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  line-height: 1.6;
  margin-top: 4px;
}
.physics-box .hl { color: var(--accent); }
.physics-box .eq { color: #8899b8; }

/* ── Viewport ── */
.viewport {
  position: relative;
  background: #04060a;
  border-radius: 10px;
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#sim {
  flex: 1;
  display: block;
  width: 100%;
  min-height: 0;
}

/* ── Stats bar ── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.stat {
  background: var(--panel);
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
}
.stat-label { font-size: 0.55rem; color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; margin-bottom: 2px; }
.stat-val { font-family: var(--mono); font-size: 0.85rem; color: #fff; }
.stat-unit { font-size: 0.55rem; color: var(--text-dim); }

/* ── Graphs row ── */
.graphs-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  flex-shrink: 0;
  padding: 8px;
  background: var(--panel);
  border-top: 1px solid var(--border);
}
.graph-wrap {
  background: var(--bg);
  border-radius: 6px;
  border: 1px solid var(--border);
  position: relative;
  height: 80px;
  overflow: hidden;
}
.graph-wrap canvas { width: 100%; height: 100%; display: block; }
.graph-label {
  position: absolute;
  top: 4px; left: 6px;
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  pointer-events: none;
}

/* ── HUD overlay ── */
.hud {
  position: absolute;
  top: 12px; left: 12px;
  background: rgba(8,11,16,0.82);
  border: 1px solid var(--border2);
  border-radius: 8px;
  padding: 9px 12px;
  font-family: var(--mono);
  font-size: 0.62rem;
  pointer-events: none;
  backdrop-filter: blur(4px);
  min-width: 170px;
}
.hud-row { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 2px; color: var(--text-dim); }
.hud-row .hv { color: var(--accent); }
.hud-row .hv.good { color: var(--success); }
.hud-row .hv.bad { color: var(--danger); }

/* ── AI overlay ── */
.ai-panel {
  position: absolute;
  top: 12px; right: 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: flex-end;
}
#btn-auto {
  display: none;
  width: auto;
  padding: 6px 12px;
  font-size: 0.62rem;
}
#ai-computing {
  display: none;
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--success);
  background: rgba(16,201,126,0.1);
  border: 1px solid rgba(16,201,126,0.3);
  border-radius: 5px;
  padding: 4px 8px;
  animation: pulse-g 0.8s ease-in-out infinite alternate;
}
@keyframes pulse-g { from {opacity:0.6} to {opacity:1} }

/* ── Vector legend ── */
.vec-legend {
  position: absolute;
  bottom: 12px; left: 12px;
  display: flex; gap: 10px;
  font-size: 0.6rem; font-weight: 700;
  pointer-events: none;
  font-family: var(--mono);
}
.vec-item { display: flex; align-items: center; gap: 4px; color: var(--text-dim); }
.vec-swatch { width: 10px; height: 3px; border-radius: 1px; }

/* ── Crosshair camera status ── */
.cam-badge {
  position: absolute;
  bottom: 12px; right: 12px;
  font-family: var(--mono);
  font-size: 0.58rem;
  color: var(--success);
  background: rgba(16,201,126,0.08);
  border: 1px solid rgba(16,201,126,0.25);
  border-radius: 4px;
  padding: 3px 8px;
  pointer-events: none;
}

/* ── Hit flash ── */
#hit-banner {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--success);
  text-shadow: 0 0 20px rgba(16,201,126,0.8);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
  text-transform: uppercase;
}