:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-2: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #38bdf8;
  --danger: #ef4444;
  --border: rgba(255,255,255,.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
  background: linear-gradient(180deg, #020617 0%, #111827 100%);
  color: var(--text);
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
.wrap { width: min(1200px, calc(100vw - 32px)); margin: 0 auto; }
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(2,6,23,.75);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 5;
}
.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  gap: 16px;
}
.brand { font-weight: 800; letter-spacing: .02em; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.card {
  background: rgba(17,24,39,.92);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0,0,0,.28);
}
.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  margin-top: 28px;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.05; margin: 0 0 16px; }
.eyebrow { color: var(--primary); text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; }
.actions, .controls { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.btn {
  background: var(--primary);
  color: #00131f;
  border: 0;
  border-radius: 14px;
  padding: 11px 16px;
  font-weight: 700;
  cursor: pointer;
}
.btn-secondary {
  background: var(--panel-2);
  color: var(--text);
}
.btn-danger {
  background: var(--danger);
  color: white;
}
.check-list { margin: 0; padding-left: 20px; line-height: 1.9; align-self: center; }
.flash-stack { margin: 20px 0; display: grid; gap: 10px; }
.flash {
  border-radius: 14px;
  padding: 12px 16px;
  border: 1px solid var(--border);
}
.flash-success { background: rgba(34,197,94,.15); }
.flash-error { background: rgba(239,68,68,.15); }
.form-card {
  width: min(540px, 100%);
  margin: 28px auto;
}
.stack-form { display: grid; gap: 14px; }
.stack-form label { display: grid; gap: 8px; }
.inline { display: flex !important; align-items: center; gap: 8px; }
input, select {
  width: 100%;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
}
.dashboard-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 24px;
  margin-top: 28px;
}
.world-list { display: grid; gap: 14px; }
.world-item {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  border-radius: 16px;
  padding: 16px;
}
.world-item h2 { margin: 0 0 6px; font-size: 1.05rem; }
.game-shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  margin-top: 28px;
}
.control-panel { display: grid; align-content: start; gap: 18px; }
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stats > div {
  background: rgba(255,255,255,.03);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
}
.stats strong { display: block; font-size: 1.4rem; }
.stats span, .muted { color: var(--muted); }
.board-panel { overflow: auto; }
#life-canvas {
  width: 100%;
  max-width: 100%;
  background: #030712;
  border-radius: 18px;
  border: 1px solid var(--border);
  display: block;
}
@media (max-width: 980px) {
  .hero, .dashboard-grid, .game-shell {
    grid-template-columns: 1fr;
  }
}