/* ── Design tokens ─────────────────────────────────────────────────────── */
:root {
  --color-bg:       #0a0f1e;
  --color-surface:  #111827;
  --color-surface2: #1e293b;
  --color-border:   #2d3f5a;
  --color-text:     #e2e8f0;
  --color-muted:    #94a3b8;
  --color-accent:   #22d3ee;
  --color-accent2:  #a78bfa;
  --color-danger:   #f87171;
  --color-success:  #4ade80;
  --color-warn:     #fbbf24;
  --radius:         8px;
  --radius-lg:      14px;
  --shadow:         0 4px 24px rgba(0,0,0,0.5);
  --transition:     0.18s ease;
  --font:           'Segoe UI', system-ui, sans-serif;
}

/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
}

/* ── Utilities ─────────────────────────────────────────────────────────── */
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}
.flex { display: flex; }
.grid { display: grid; }

/* ── Scrollbar ─────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-surface); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }

/* ── Sim panel ─────────────────────────────────────────────────────────── */
#sim-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  gap: 0;
}

#canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #050810;
}

#canvas-container canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

/* ── Gene pool view ────────────────────────────────────────────────────── */
.gene-pool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  padding: 14px;
  overflow-y: auto;
  height: 100%;
}

.gene-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px 8px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
}
.gene-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}
.gene-card canvas { border-radius: 50%; margin-bottom: 6px; }
.gene-card .gc-name { font-size: 11px; color: var(--color-muted); }
.gene-card .gc-gen  { font-size: 12px; font-weight: 600; }

/* ── Stats view ────────────────────────────────────────────────────────── */
.stats-container {
  padding: 16px;
  overflow-y: auto;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-content: start;
}

.stat-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
}
.stat-card h3 { font-size: 11px; text-transform: uppercase; color: var(--color-muted); margin-bottom: 8px; letter-spacing: .06em; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--color-accent); }
.stat-sub { font-size: 11px; color: var(--color-muted); margin-top: 2px; }

.chart-card {
  grid-column: 1 / -1;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px;
}
.chart-card h3 { font-size: 11px; text-transform: uppercase; color: var(--color-muted); margin-bottom: 10px; letter-spacing: .06em; }
.chart-card canvas { width: 100% !important; }

/* ── Modal creature details ────────────────────────────────────────────── */
.creature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  min-width: 280px;
}
.cd-row { display: flex; flex-direction: column; gap: 2px; }
.cd-label { font-size: 11px; color: var(--color-muted); text-transform: uppercase; letter-spacing: .05em; }
.cd-val { font-weight: 600; }
.dna-bar {
  height: 12px; border-radius: 6px; margin-top: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent2));
}

/* ── Button ────────────────────────────────────────────────────────────── */
button {
  font-family: var(--font);
  font-size: 13px;
  cursor: pointer;
  border: none;
  border-radius: var(--radius);
  padding: 6px 14px;
  transition: background var(--transition), opacity var(--transition);
}
button.primary { background: var(--color-accent); color: #000; font-weight: 600; }
button.primary:hover { opacity: .85; }
button.ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
button.ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
button.danger { background: var(--color-danger); color: #000; font-weight: 600; }

input[type=range] {
  accent-color: var(--color-accent);
  width: 100%;
}
label { font-size: 12px; color: var(--color-muted); }