/* ==========================================================================
   1. Custom Properties
   ========================================================================== */
:root {
  /* backgrounds */
  --color-bg:          #0a0e1a;
  --color-bg-raised:   #10162b;
  --color-bg-panel:    #171f3d;
  --color-border:      #232c4f;

  /* text */
  --color-text:        #F5F5F7;
  --color-text-muted:  #C7CBD6;
  --color-text-faint:  #8B90A3;

  /* accent 1: coin gold */
  --color-gold:        #E8B84B;
  --color-gold-bright: #F6CD6B;

  /* accent 2: muted brick red (sparing use only) */
  --color-brick:        #B5533C;
  --color-brick-bright: #D8724F;

  /* spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;

  /* layout */
  --content-max-width: 900px;
  --rail-width-desktop: 88px;
  --rail-width-tablet: 56px;
  --rail-height-mobile: 6px;

  /* motion */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 600ms ease;
  --reveal-distance: 24px;

  /* z-index */
  --z-rail: 50;
  --z-skip-link: 100;

  /* fonts */
  --font-pixel: 'Press Start 2P', 'Courier New', monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(232, 184, 75, 0.08), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(59, 93, 201, 0.12), transparent 50%),
    var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  position: relative;
}

.sky {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.55;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,0.55), transparent),
    radial-gradient(1px 1px at 28% 62%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.5px 1.5px at 44% 30%, rgba(246,205,107,0.55), transparent),
    radial-gradient(1px 1px at 61% 78%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 73% 22%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 88% 48%, rgba(246,205,107,0.4), transparent),
    radial-gradient(1px 1px at 6% 84%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 52% 8%, rgba(255,255,255,0.45), transparent);
  animation: sky-twinkle 6s ease-in-out infinite;
}
@keyframes sky-twinkle {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 0.7; }
}

.site-header, .path-rail, main, .skip-link { position: relative; z-index: 1; }

img { max-width: 100%; display: block; }

:focus-visible {
  outline: 2px solid var(--color-gold-bright);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ==========================================================================
   3. Typography
   ========================================================================== */
h1, h2, h3 {
  font-family: var(--font-pixel);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0 0 var(--space-4);
}

h1 { font-size: clamp(1.25rem, 4vw, 2rem); }
h2 { font-size: clamp(1.05rem, 2.8vw, 1.5rem); }
h3 {
  font-size: clamp(0.8rem, 2vw, 0.95rem);
  margin-top: var(--space-5);
  color: var(--color-gold-bright);
}

p { margin: 0 0 var(--space-4); }

ul, ol { margin: 0 0 var(--space-4); padding-left: 1.25em; }
li { margin-bottom: var(--space-2); }

strong { color: #ffffff; font-weight: 600; }
em { color: var(--color-text-muted); }

a {
  color: var(--color-gold);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-decoration-color: var(--color-gold);
  text-underline-offset: 3px;
}
a:hover, a:focus-visible {
  color: var(--color-gold-bright);
  text-decoration-color: var(--color-gold-bright);
}

.tool-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 8px;
  margin: 0 1px;
  vertical-align: -0.35em;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-gold);
  text-decoration: none;
  font-weight: 600;
  transition: border-color var(--transition-fast), background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}
.tool-chip:hover, .tool-chip:focus-visible {
  border-color: var(--color-gold-bright);
  background: var(--color-bg-raised);
  color: var(--color-gold-bright);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.35);
}
.tool-chip svg { flex-shrink: 0; }

code {
  font-family: var(--font-mono);
  background: var(--color-bg-panel);
  padding: 2px 6px;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--color-gold-bright);
}

.welcome-hero {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  margin-bottom: var(--space-5);
}
.welcome-hero__photo {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--color-gold);
  flex-shrink: 0;
  box-shadow: 0 0 0 0 rgba(232, 184, 75, 0.35);
  animation: photo-ring-pulse 2.8s ease-in-out infinite;
}
.welcome-hero__copy { flex: 1; min-width: 0; }
.welcome-hero .stage-eyebrow,
.welcome-hero h1 { margin-bottom: 0; }
.welcome-hero h1 { margin-top: var(--space-3); }

.stage-eyebrow--start {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  background: none;
  border: none;
  box-shadow: none;
}

/* Tiny CSS Mario — idle bounce beside START */
.mario {
  display: inline-block;
  width: 16px;
  height: 16px;
  image-rendering: pixelated;
  flex-shrink: 0;
  background:
    linear-gradient(#E52521 0 0) 4px 0 / 8px 2px no-repeat,
    linear-gradient(#E52521 0 0) 2px 2px / 12px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 2px 4px / 4px 2px no-repeat,
    linear-gradient(#FFD29D 0 0) 6px 4px / 4px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 10px 4px / 2px 2px no-repeat,
    linear-gradient(#FFD29D 0 0) 12px 4px / 2px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 2px 6px / 2px 2px no-repeat,
    linear-gradient(#FFD29D 0 0) 4px 6px / 2px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 6px 6px / 2px 2px no-repeat,
    linear-gradient(#FFD29D 0 0) 8px 6px / 6px 2px no-repeat,
    linear-gradient(#FFD29D 0 0) 2px 8px / 12px 2px no-repeat,
    linear-gradient(#3B5DC9 0 0) 4px 10px / 8px 2px no-repeat,
    linear-gradient(#E52521 0 0) 2px 10px / 2px 2px no-repeat,
    linear-gradient(#E52521 0 0) 12px 10px / 2px 2px no-repeat,
    linear-gradient(#3B5DC9 0 0) 2px 12px / 4px 2px no-repeat,
    linear-gradient(#3B5DC9 0 0) 10px 12px / 4px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 0 14px / 4px 2px no-repeat,
    linear-gradient(#6B3E26 0 0) 12px 14px / 4px 2px no-repeat;
  animation: mario-idle 1.1s steps(2, end) infinite;
}
@keyframes mario-idle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
@keyframes photo-ring-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(232, 184, 75, 0.35); }
  50% { box-shadow: 0 0 0 6px rgba(232, 184, 75, 0); }
}

@media (max-width: 480px) {
  .welcome-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
}

.stage-eyebrow {
  display: inline-block;
  font-family: var(--font-pixel);
  font-size: 0.6rem;
  color: var(--color-gold-bright);
  letter-spacing: 1px;
  margin: 0 0 var(--space-3);
  padding: 6px 10px;
  background: rgba(232, 184, 75, 0.1);
  border: 1px solid rgba(232, 184, 75, 0.45);
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.25);
}

.signature {
  font-style: italic;
  color: var(--color-text-muted);
  margin-top: var(--space-5);
}

.crew-list { margin: 0 0 var(--space-4); }
.crew-list dt { font-weight: 600; color: #ffffff; margin-top: var(--space-3); }
.crew-list dt:first-child { margin-top: 0; }
.crew-list dd { margin: var(--space-1) 0 0; color: var(--color-text-muted); }

.reference-links { font-size: 0.9rem; color: var(--color-text-faint); }

/* ==========================================================================
   4. Layout — header, worlds, stages, reveal state
   ========================================================================== */
.site-header {
  padding: var(--space-4) var(--space-5);
  margin-left: var(--rail-width-desktop);
}
.site-header__logo {
  height: 28px;
  width: auto;
  opacity: 0.92;
  animation: logo-in 700ms ease;
}
@keyframes logo-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 0.92; transform: translateY(0); }
}

main { margin-left: var(--rail-width-desktop); }

.stage {
  max-width: var(--content-max-width);
  margin-inline: auto;
  padding: var(--space-7) var(--space-4);
  border-radius: 4px;
}

.stage > * {
  opacity: 0;
  transform: translateY(var(--reveal-distance));
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.stage.is-revealed > * {
  opacity: 1;
  transform: translateY(0);
}
.stage.is-revealed > *:nth-child(1) { transition-delay: 0ms; }
.stage.is-revealed > *:nth-child(2) { transition-delay: 60ms; }
.stage.is-revealed > *:nth-child(3) { transition-delay: 120ms; }
.stage.is-revealed > *:nth-child(4) { transition-delay: 180ms; }
.stage.is-revealed > *:nth-child(5) { transition-delay: 240ms; }
.stage.is-revealed > *:nth-child(6) { transition-delay: 300ms; }
.stage.is-revealed > *:nth-child(7) { transition-delay: 360ms; }
.stage.is-revealed > *:nth-child(8) { transition-delay: 420ms; }
.stage.is-revealed > *:nth-child(n + 9) { transition-delay: 480ms; }

.stage:nth-of-type(even) {
  background: linear-gradient(180deg, rgba(16, 22, 43, 0.92), rgba(16, 22, 43, 0.75));
  box-shadow: inset 0 0 0 1px rgba(35, 44, 79, 0.7);
}

.stage--bookend { padding-block: var(--space-6) var(--space-7); }
.stage--bookend > p { margin-bottom: var(--space-4); }
.stage--bookend > p + p { margin-top: 0; }
.stage--boss {
  background:
    radial-gradient(500px 220px at 80% 0%, rgba(232, 184, 75, 0.14), transparent 60%),
    linear-gradient(180deg, rgba(23, 31, 61, 0.95), rgba(10, 14, 26, 0.9));
  border: 2px solid var(--color-gold);
  box-shadow: 0 0 40px rgba(232, 184, 75, 0.12), inset 0 0 0 1px rgba(246, 205, 107, 0.2);
}

.world-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: var(--content-max-width);
  margin: var(--space-3) auto;
  padding: var(--space-5) var(--space-4);
}
.world-divider::before, .world-divider::after {
  content: '';
  flex: 1;
  height: 4px;
  background:
    repeating-linear-gradient(
      90deg,
      var(--color-gold) 0 8px,
      transparent 8px 14px
    );
  opacity: 0.55;
  transition: transform 700ms ease;
}
.world-divider::before { transform: scaleX(0); transform-origin: right; }
.world-divider::after { transform: scaleX(0); transform-origin: left; }
.world-divider.is-revealed::before, .world-divider.is-revealed::after { transform: scaleX(1); }

.world-divider__label {
  font-family: var(--font-pixel);
  font-size: 0.58rem;
  letter-spacing: 1px;
  color: var(--color-gold-bright);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 400ms ease 300ms;
  background: var(--color-bg-panel);
  border: 2px solid var(--color-gold);
  padding: 8px 12px;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.35);
}
.world-divider.is-revealed .world-divider__label { opacity: 1; }

/* ==========================================================================
   5. Component: Path Rail
   ========================================================================== */
.path-rail {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--rail-width-desktop);
  z-index: var(--z-rail);
  padding: var(--space-6) 0;
}

.path-rail__track {
  position: absolute;
  top: var(--space-6);
  bottom: var(--space-6);
  left: 50%;
  width: 4px;
  transform: translateX(-50%);
  background: var(--color-border);
  border-radius: 2px;
  overflow: hidden;
}
.path-rail__fill {
  width: 100%;
  height: 100%;
  background: var(--color-gold);
  transform-origin: top;
  transform: scaleY(var(--progress, 0));
  transition: transform 400ms ease;
}

.path-rail__list {
  position: relative;
  z-index: 1;
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  margin: 0;
  padding: 0;
}
.path-rail__list li { margin: 0; }

.path-rail__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-decoration: none;
  color: var(--color-text-faint);
}

.path-rail__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.path-rail__code {
  font-family: var(--font-pixel);
  font-size: 0.5rem;
  letter-spacing: 0.5px;
}

.path-rail__marker:hover .path-rail__dot,
.path-rail__marker:focus-visible .path-rail__dot {
  border-color: var(--color-gold-bright);
}

.path-rail__marker.is-passed .path-rail__dot {
  background: var(--color-gold);
  border-color: var(--color-gold);
  animation: marker-pop 350ms ease;
}
.path-rail__marker.is-passed .path-rail__code { color: var(--color-gold); }

@keyframes marker-pop {
  0% { transform: scale(0.6); }
  60% { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.path-rail__marker.is-current .path-rail__dot {
  background: var(--color-gold-bright);
  border-color: var(--color-gold-bright);
  box-shadow: 0 0 0 4px rgba(246, 205, 107, 0.2);
  animation: marker-bob 2s ease-in-out infinite;
}
.path-rail__marker.is-current .path-rail__code { color: var(--color-gold-bright); }

@keyframes marker-bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-4px); }
}

.path-rail__current-label {
  display: none;
  position: fixed;
  top: calc(var(--rail-height-mobile) + 8px);
  right: 12px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-border);
  color: var(--color-gold-bright);
  font-family: var(--font-pixel);
  font-size: 0.55rem;
  padding: 6px 10px;
  border-radius: 2px;
  z-index: var(--z-rail);
}

/* ==========================================================================
   6. Component: Scene Cameo (GIF cutscenes)
   ========================================================================== */
/* GIF floats right; copy wraps beside it (no empty void under the title) */
.stage::after {
  content: '';
  display: table;
  clear: both;
}

.scene-cameo {
  float: right;
  margin: 0 0 var(--space-4) var(--space-5);
  width: min(280px, 42%);
  max-width: 280px;
  transform: rotate(2deg);
  animation: cameo-float 3.2s ease-in-out infinite;
}
.scene-cameo--yoda { transform: rotate(-2.5deg); }
.scene-cameo--michael { transform: rotate(1.5deg); }
.scene-cameo--buzz { transform: rotate(-1deg); }
.scene-cameo--obiwan { transform: rotate(-2deg); }
.scene-cameo--neo { transform: rotate(1.5deg); }
.scene-cameo--hero { max-width: 220px; }

.scene-cameo__frame {
  position: relative;
  background: #05070f;
  border: 3px solid var(--color-gold);
  box-shadow:
    6px 6px 0 rgba(0, 0, 0, 0.45),
    0 0 0 2px rgba(181, 83, 60, 0.55),
    0 12px 28px rgba(0, 0, 0, 0.45);
  overflow: hidden;
  aspect-ratio: 16 / 10;
}
.scene-cameo__frame::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), transparent 28%, transparent 70%, rgba(0,0,0,0.25));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}
.scene-cameo__gif {
  width: 100%;
  height: 100%;
  object-fit: cover;
  image-rendering: auto;
}

/* Square/portrait GIFs — drop the wide crop and size to the GIF */
.scene-cameo--buzz,
.scene-cameo--obiwan {
  max-width: 200px;
}
.scene-cameo--buzz .scene-cameo__frame,
.scene-cameo--obiwan .scene-cameo__frame {
  aspect-ratio: auto;
  height: auto;
}
.scene-cameo--buzz .scene-cameo__gif,
.scene-cameo--obiwan .scene-cameo__gif {
  width: 100%;
  height: auto;
  object-fit: unset;
  display: block;
}
.scene-cameo__tag {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-pixel);
  font-size: 0.5rem;
  letter-spacing: 1px;
  color: var(--color-bg);
  background: var(--color-gold);
  padding: 6px 8px;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.4);
}

.stage.is-revealed .scene-cameo {
  animation: cameo-pop 520ms cubic-bezier(0.2, 1.2, 0.3, 1) both, cameo-float 3.2s ease-in-out 520ms infinite;
}
@keyframes cameo-pop {
  from { opacity: 0; transform: scale(0.8) rotate(-6deg) translateY(18px); }
  to { opacity: 1; transform: scale(1) rotate(2deg) translateY(0); }
}
@keyframes cameo-float {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -6px; }
}

@media (max-width: 700px) {
  .scene-cameo {
    float: none;
    display: block;
    width: min(100%, 320px);
    max-width: min(100%, 320px);
    margin: 0 0 var(--space-4);
  }
  .scene-cameo--buzz,
  .scene-cameo--buzz.scene-cameo--hero,
  .scene-cameo--obiwan {
    max-width: 200px;
  }
}

/* ==========================================================================
   7. Component: Checklist
   ========================================================================== */
.checklist-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  margin: var(--space-4) 0;
}

.checklist-group {
  border: 1px solid var(--color-border);
  background: var(--color-bg-panel);
  border-radius: 2px;
  padding: var(--space-4);
  margin: 0;
}
.checklist-group legend {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.75rem;
  color: var(--color-gold);
  padding: 0 var(--space-2);
}

.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: var(--space-3);
}
.checklist li:last-child { margin-bottom: 0; }

.checklist input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  margin-top: 2px;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  cursor: pointer;
  position: relative;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.checklist input[type="checkbox"]:checked {
  background: var(--color-gold);
  border-color: var(--color-gold);
}
.checklist input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 6px;
  height: 11px;
  border: solid var(--color-bg);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  animation: check-pop 200ms ease;
}
@keyframes check-pop {
  from { transform: scale(0) rotate(45deg); }
  to { transform: scale(1) rotate(45deg); }
}

.checklist label { cursor: pointer; }
.checklist li.is-done label { opacity: 0.55; text-decoration: line-through; }

/* ==========================================================================
   8. Component: Video Embed
   ========================================================================== */
.video-embed {
  aspect-ratio: 16 / 9;
  background: var(--color-bg-panel);
  border-radius: 2px;
  overflow: hidden;
  margin: var(--space-4) 0;
}
.video-embed iframe { width: 100%; height: 100%; border: 0; }

/* ==========================================================================
   9. Component: Leaderboard Table & Map callout
   ========================================================================== */
.leaderboard {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.leaderboard caption {
  text-align: left;
  font-family: var(--font-body);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.8rem;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}
.leaderboard th, .leaderboard td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
.leaderboard tbody tr { transition: background var(--transition-fast); }
.leaderboard tbody tr:hover { background: rgba(232, 184, 75, 0.07); }
.leaderboard thead th {
  color: var(--color-text-faint);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.5px;
}
.leaderboard__row--self { background: rgba(232, 184, 75, 0.08); }
.leaderboard__score--top { color: var(--color-gold); font-weight: 700; }

.map-callout {
  background: var(--color-bg-panel);
  border-left: 4px solid var(--color-gold);
  padding: var(--space-3) var(--space-4);
  border-radius: 2px;
  margin: var(--space-4) 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   10. Utilities
   ========================================================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 8px;
  top: -48px;
  background: var(--color-gold);
  color: var(--color-bg);
  padding: 8px 16px;
  border-radius: 2px;
  z-index: var(--z-skip-link);
  transition: top var(--transition-fast);
  text-decoration: none;
  font-weight: 600;
}
.skip-link:focus {
  top: 8px;
}

/* ==========================================================================
   11. Responsive Overrides
   ========================================================================== */
@media (max-width: 999px) {
  .path-rail { width: var(--rail-width-tablet); }
  .path-rail__code {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .site-header, main { margin-left: var(--rail-width-tablet); }
}

@media (max-width: 640px) {
  .path-rail {
    top: 0; left: 0; right: 0;
    height: var(--rail-height-mobile);
    width: 100%;
    padding: 0;
  }
  .path-rail__track {
    top: 0; bottom: auto; left: 0; right: 0;
    width: 100%; height: 100%;
    transform: none;
  }
  .path-rail__fill { transform-origin: left; transform: scaleX(var(--progress, 0)); }
  .path-rail__list {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .path-rail__current-label { display: block; }

  .site-header, main { margin-left: 0; }
  .site-header { padding-top: calc(var(--rail-height-mobile) + var(--space-4)); }
  main { padding-top: var(--space-4); }

  .stage { padding: var(--space-6) var(--space-3); }
  .checklist-panel { grid-template-columns: 1fr; }
}

/* ==========================================================================
   12. Reduced-Motion Overrides (always last, always wins)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .stage > * { transition: none; }
  .path-rail__fill { transition: none; }
  .path-rail__dot { transition: none; }
  .path-rail__marker.is-current .path-rail__dot { animation: none; }
  .path-rail__marker.is-passed .path-rail__dot { animation: none; }
  .world-divider::before, .world-divider::after { transition: none; transform: scaleX(1); }
  .world-divider__label { transition: none; opacity: 1; }
  .site-header__logo { animation: none; opacity: 0.92; }
  .welcome-hero__photo { animation: none; box-shadow: none; }
  .mario { animation: none; }
  .sky { animation: none; opacity: 0.45; }
  .scene-cameo,
  .stage.is-revealed .scene-cameo { animation: none; }
  .checklist input[type="checkbox"]:checked::after { animation: none; }
  .tool-chip { transition: none; }
  .leaderboard tbody tr { transition: none; }
}