:root {
  --bg0: #0a100e;
  --bg1: #14201a;
  --ink: #e8f2ec;
  --muted: #8fa899;
  --accent: #3dba7c;
  --line: rgba(232, 242, 236, 0.14);
  --flash: rgba(61, 186, 124, 0.22);
  --font-display: "Segoe UI", "Helvetica Neue", sans-serif;
  --font-mono: "Cascadia Mono", "SF Mono", "Consolas", monospace;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(900px 480px at 12% -8%, #1a3a2c 0%, transparent 55%),
    radial-gradient(700px 420px at 100% 8%, #2a3218 0%, transparent 48%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 45%, var(--bg0));
  color: var(--ink);
  font-family: var(--font-display);
}

body {
  padding: 1.25rem 1rem 2.5rem;
}

.stage {
  max-width: 640px;
  margin: 0 auto;
}

.hero {
  margin-bottom: 1.4rem;
  animation: rise 0.55s ease-out both;
}

.brand {
  margin: 0;
  font-size: clamp(2rem, 7vw, 2.75rem);
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.lede {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 1rem;
  max-width: 28ch;
}

.conn {
  margin: 0.75rem 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.conn.ok {
  color: var(--accent);
}

.conn.bad {
  color: #d96b5c;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 0.5rem 0 1rem;
  animation: rise 0.7s ease-out both;
}

.cell {
  padding: 0.85rem 0.35rem 0.95rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 0.35s ease;
}

.cell.pulse {
  background: var(--flash);
}

.cell .label {
  display: block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.cell .value {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 5.5vw, 2.1rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.cell.best .value {
  color: var(--accent);
}

.session {
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 0.88rem;
  font-family: var(--font-mono);
  min-height: 1.25em;
  animation: rise 0.85s ease-out both;
}

.passes h2 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  font-weight: 600;
  color: var(--muted);
}

#passList {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  max-height: min(52vh, 420px);
  overflow: auto;
}

#passList li {
  display: grid;
  grid-template-columns: 2.75rem 1fr auto;
  gap: 0.65rem;
  padding: 0.55rem 0.15rem;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  animation: insert 0.28s ease-out;
}

#passList li span:last-child {
  color: var(--muted);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes insert {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 480px) {
  .board {
    grid-template-columns: 1fr;
  }
}