:root {
  color-scheme: light;
  --ink: #0f172a;
  --muted: #475569;
  --panel: #f8fafc;
  --panel-dark: #e2e8f0;
  --accent: #3b82f6;
  --accent-2: #a855f7;
  --accent-3: #22c55e;
  --bg: #eff6ff;
  --pixel: 6px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Nunito", system-ui, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #fef9c3 0%, #e0f2fe 35%, #e2e8f0 100%);
}

main {
  max-width: 1150px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

.hero {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  margin-top: 32px;
}

.hero h1 {
  font-family: "Press Start 2P", "Poppins", sans-serif;
  font-size: 28px;
  line-height: 1.3;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.hero p {
  font-size: 17px;
  line-height: 1.7;
  margin: 0 0 16px;
  color: var(--muted);
}

.pixel-panel {
  background: var(--panel);
  border: 2px solid #0f172a;
  box-shadow: 6px 6px 0 #0f172a;
  padding: 20px;
  border-radius: 6px;
}

.pixel-panel h2,
.pixel-panel h3 {
  font-family: "Poppins", sans-serif;
  margin: 0 0 8px;
}

.meta-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--panel-dark);
  background: #fff;
  font-weight: 700;
  font-size: 12px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.section {
  margin-top: 36px;
}

.section h2 {
  font-family: "Press Start 2P", "Poppins", sans-serif;
  font-size: 18px;
  margin-bottom: 16px;
}

.card-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  border: 2px solid #0f172a;
  background: #fff;
  box-shadow: 4px 4px 0 #0f172a;
  border-radius: 6px;
  padding: 16px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.card p,
.card li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.card ul {
  padding-left: 18px;
  margin: 8px 0 0;
}

.gameplay {
  background: rgba(255, 255, 255, 0.6);
  border-radius: 16px;
  padding: 24px;
  border: 2px solid #0f172a;
  box-shadow: 6px 6px 0 #0f172a;
}

.gameplay p {
  color: var(--muted);
  margin: 0 0 16px;
}

.gameplay-panel {
  display: grid;
  gap: 20px;
}

.gameplay-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tool-btn {
  border: 2px solid #0f172a;
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 700;
  background: #fff;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}

.tool-btn.active {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

.gameplay-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.node {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-start;
  border: 2px dashed #0f172a;
  border-radius: 12px;
  padding: 16px;
  background: #fff;
  cursor: pointer;
  min-height: 96px;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.node span {
  font-weight: 700;
}

.node small {
  color: var(--muted);
}

.node.restored {
  border-style: solid;
  background: #dcfce7;
  border-color: #16a34a;
  transform: translateY(-2px);
}

.gameplay-status {
  display: grid;
  gap: 12px;
  align-items: center;
  grid-template-columns: minmax(0, 1fr);
}

.meter {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  border: 2px solid #0f172a;
  background: #fff;
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  transition: width 0.3s ease;
}

.status-text {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.reset-btn {
  justify-self: start;
  border: 2px solid #0f172a;
  background: #fff;
  padding: 8px 14px;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
}

.timeline {
  display: grid;
  gap: 12px;
}

.timeline-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.timeline-step span {
  font-family: "Press Start 2P", "Poppins", sans-serif;
  font-size: 12px;
  background: var(--accent);
  color: #fff;
  padding: 6px 8px;
  border-radius: 4px;
}

.timeline-step p {
  margin: 0;
  color: var(--muted);
}

.toggle-row {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.toggle {
  background: #fff;
  border: 2px dashed #0f172a;
  padding: 12px;
  border-radius: 8px;
}

.toggle label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.toggle small {
  display: block;
  margin-top: 6px;
  color: var(--muted);
}

.notice {
  margin-top: 12px;
  font-size: 14px;
  color: #1e293b;
  background: #fef3c7;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid #f59e0b;
}

.legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.legend span {
  background: #fff;
  border: 1px solid var(--panel-dark);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
}

.data-panel {
  background: #0f172a;
  color: #f8fafc;
  padding: 16px;
  border-radius: 10px;
  font-family: "Press Start 2P", "Poppins", sans-serif;
  font-size: 11px;
  line-height: 1.6;
}

.footer-note {
  margin-top: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 22px;
  }
}