/* ===== Topbar / nav ===== */

.devs-badge {
  position: fixed;
  top: 16px;
  right: 20px;
  background: var(--bg);
  padding: 6px 10px;
  border: 2px solid var(--border);
  z-index: 10;
  line-height: 0;
}

.devs-badge img {
  height: 22px;
  width: auto;
  image-rendering: pixelated;
}

/* ===== Entry screen ===== */

.entry-screen {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 24px;
  overflow: auto;
  background: var(--bg);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.entry-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.entry-content {
  width: min(100%, 720px);
  padding: clamp(32px, 8vw, 72px);
  text-align: center;
  background: var(--surface);
  border: 3px solid var(--accent);
  box-shadow: 8px 8px 0 var(--surface-alt);
}

.entry-kicker, .entry-content h1, .entry-button {
  font-family: "Press Start 2P", "Courier New", monospace;
}

.entry-kicker {
  margin: 0 0 24px;
  color: var(--accent);
  font-size: 0.65rem;
  line-height: 1.8;
}

.entry-content h1 {
  margin: 0;
  max-width: 100%;
  color: var(--text);
  font-size: clamp(2rem, 7vw, 4.5rem);
  line-height: 1.35;
  text-shadow: 4px 4px 0 var(--accent-strong);
}

.entry-content > p:not(.entry-kicker) {
  max-width: 480px;
  margin: 28px auto;
  color: var(--text-dim);
  font-size: 1.1rem;
}

.entry-button {
  padding: 16px 20px;
  color: #fff;
  background: var(--accent-strong);
  border: 2px solid var(--accent);
  box-shadow: 4px 4px 0 var(--bg);
  font-size: 0.7rem;
  line-height: 1.6;
  cursor: pointer;
}

.entry-button:hover, .entry-button:focus-visible {
  color: var(--text);
  background: var(--surface-alt);
  outline: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 130px 16px 24px;
  background: var(--surface);
  border-bottom: 2px solid var(--border);
}

.brand {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--accent);
}

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

.tab-btn {
  background: var(--surface-alt);
  color: var(--text-dim);
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 10px 12px;
  font-size: 0.6rem;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--bg);
}

.tab-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.tab-btn.active {
  background: var(--accent-strong);
  color: #fff;
  border-color: var(--accent-strong);
}

/* ===== Stage / panels (slide-like framing) ===== */

.stage {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
  min-height: calc(100vh - 98px);
}

.title-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.title-row h1 {
  margin-bottom: 0;
}

.mascot {
  height: 96px;
  width: auto;
  image-rendering: pixelated;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .mascot {
    display: none;
  }
}

.panel h1 {
  margin: 0 0 16px;
  font-size: 1.5rem;
  line-height: 1.6;
  border-left: 6px solid var(--accent);
  padding-left: 14px;
}

.panel h2 {
  margin: 36px 0 12px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
}

.panel h2:first-of-type {
  margin-top: 0;
}

.lead {
  color: var(--text-dim);
  font-size: 1.1rem;
  margin: 0 0 24px;
}

/* ===== Reusable content blocks ===== */

.box {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 16px 20px;
  margin-bottom: 16px;
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.box h3 {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.box p {
  margin: 0;
  color: var(--text);
}

.box a, .solutions-dropdown a {
  color: var(--accent);
}

.box a:hover, .solutions-dropdown a:hover {
  color: var(--text);
}

.command-block {
  margin: 14px 0 10px;
  padding: 12px 14px;
  overflow-x: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  line-height: 1.7;
}

.command-block code {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  white-space: pre;
}

.hint {
  color: var(--text-dim) !important;
  font-size: 0.92rem;
}

.run-project {
  margin-top: 24px;
}

.solutions-dropdown {
  margin: 24px 0 16px;
  background: var(--surface);
  border: 2px solid var(--border);
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.solutions-dropdown summary {
  padding: 16px 20px;
  color: var(--accent);
  font-family: "Press Start 2P", "Courier New", monospace;
  font-size: 0.7rem;
  line-height: 1.7;
  cursor: pointer;
}

.solutions-dropdown summary span {
  display: block;
  margin-top: 8px;
  color: var(--text-dim);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.9rem;
}

.solutions-content {
  padding: 0 20px 18px;
  border-top: 1px solid var(--border);
}

.solutions-content p {
  margin: 16px 0 0;
}

.solution-list {
  margin: 14px 0 0;
  padding-left: 22px;
}

.solution-list li {
  margin-bottom: 8px;
}

.gesture-reference-image {
  margin: 24px 0 16px;
  padding: 16px;
  background: var(--surface);
  border: 2px solid var(--border);
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.gesture-reference-image img {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
  margin: 0 auto;
}

.gesture-reference-image figcaption {
  margin-top: 12px;
  color: var(--text-dim);
  text-align: center;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 640px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.checklist, .feature-list {
  background: var(--surface);
  border: 2px solid var(--border);
  padding: 16px 16px 16px 36px;
  margin: 0 0 16px;
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.checklist li, .feature-list li {
  margin-bottom: 10px;
}

.checklist li:last-child, .feature-list li:last-child {
  margin-bottom: 0;
}

.placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 220px;
  background: var(--surface-alt);
  border: 2px dashed var(--border);
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.diagram-image {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto 16px;
  image-rendering: pixelated;
}

.demo-image {
  margin: 24px 0 16px;
  padding: 16px;
  background: var(--surface);
  border: 2px solid var(--border);
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.demo-image img {
  display: block;
  width: 100%;
  height: auto;
}

.demo-image figcaption {
  margin-top: 12px;
  color: var(--text-dim);
  text-align: center;
}

.image-reference {
  margin: 24px 0 16px;
  padding: 16px;
  background: var(--surface);
  border: 2px solid var(--border);
  box-shadow: 4px 4px 0 var(--surface-alt);
}

.image-reference img {
  display: block;
  width: 100%;
  max-width: 753px;
  height: auto;
  margin: 0 auto;
}

.image-reference figcaption {
  margin-top: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* ===== OS picker (Setup tab) ===== */

.os-picker {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}

.os-btn {
  background: var(--surface-alt);
  color: var(--text-dim);
  border: 2px solid var(--border);
  border-radius: 0;
  padding: 10px 16px;
  font-size: 0.65rem;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--bg);
}

.os-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.os-btn.active {
  background: var(--accent-strong);
  color: #fff;
  border-color: var(--accent-strong);
}

.os-panel {
  display: none;
}

.os-panel.active {
  display: block;
}