:root {
  --obsidian: #0B0E1A;
  --slate: #1A1E2E;
  --sapphire: #2B4FA3;
  --emerald: #1A7A5C;
  --silver: #8B92A8;
  --amethyst: #6B3FA0;
  --frost: #E8ECF4;
  --ruby: #A3324F;
  --grid-gap: 2px;
  --grain-opacity: 0.08;
}

* { box-sizing: border-box; }

html { background: var(--obsidian); }

body {
  margin: 0;
  min-height: 300vh;
  color: var(--frost);
  font-family: "Space Grotesk", Inter, sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(43, 79, 163, 0.18), transparent 30vw),
    radial-gradient(circle at 82% 74%, rgba(107, 63, 160, 0.16), transparent 34vw),
    var(--obsidian);
  overflow-x: hidden;
}

.svg-defs { position: absolute; pointer-events: none; }

.narrative { height: 300vh; position: relative; }

.stage-marker { height: 100vh; }

.ceremony {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: clamp(1rem, 2vw, 2rem);
  display: grid;
  grid-template-rows: 0.42fr 1fr;
  gap: clamp(0.8rem, 2vw, 1.5rem);
  background: var(--obsidian);
  isolation: isolate;
  overflow: hidden;
}

.grain-field {
  position: absolute;
  inset: -10%;
  width: 120%;
  height: 120%;
  opacity: var(--grain-opacity);
  mix-blend-mode: overlay;
  pointer-events: none;
  z-index: 5;
  animation: grainDrift 2s steps(2) infinite;
}

.grain-field rect { fill: #fff; }

.headline-stack {
  position: relative;
  z-index: 2;
  display: grid;
  align-items: end;
  min-height: 0;
}

.stage-title {
  grid-area: 1 / 1;
  margin: 0;
  font-family: "Outfit", Inter, sans-serif;
  text-transform: uppercase;
  letter-spacing: -0.04em;
  line-height: 0.82;
  text-wrap: balance;
  transition: opacity 0.9s ease, transform 1.1s ease, filter 1.1s ease;
}

.assemble-title {
  font-size: clamp(4rem, 12vw, 14rem);
  font-weight: 900;
  color: var(--frost);
  text-shadow: 0 0 60px rgba(43, 79, 163, 0.3);
  opacity: 1;
  transform: translateY(0);
  animation: titleAscend 2.3s 0.8s ease forwards;
}

.illuminate-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--silver);
  opacity: 0;
  transform: translateY(3vh);
}

.win-title {
  place-self: center;
  font-size: clamp(5.5rem, 18vw, 18rem);
  font-weight: 900;
  color: var(--frost);
  opacity: 0;
  transform: scale(0.9);
  text-shadow: 0 0 80px rgba(43, 79, 163, 0.4), 0 0 160px rgba(107, 63, 160, 0.2), 0 2px 4px rgba(0, 0, 0, 0.5);
  z-index: 4;
}

.puzzle-grid {
  position: relative;
  z-index: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(44px, 1fr);
  gap: var(--grid-gap);
  background: var(--obsidian);
  box-shadow: 0 0 0 1px rgba(43, 79, 163, 0.2), 0 24px 90px rgba(0, 0, 0, 0.35);
  transition: box-shadow 1.2s ease, background 1.2s ease;
}

.piece {
  position: relative;
  min-width: 0;
  min-height: 0;
  padding: clamp(0.8rem, 1.5vw, 1.35rem);
  display: grid;
  align-content: end;
  overflow: hidden;
  transform: scale(0.85);
  opacity: 0;
  color: var(--frost);
  cursor: pointer;
  background: var(--piece-color, var(--slate));
  clip-path: polygon(0 0, calc(50% - 12px) 0, 50% 10px, calc(50% + 12px) 0, 100% 0, 100% calc(50% - 12px), calc(100% - 10px) 50%, 100% calc(50% + 12px), 100% 100%, 0 100%);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.6s ease, filter 0.8s ease, background 1.2s ease, clip-path 1.2s ease;
}

.piece::before,
.piece::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.piece::before {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent 31%);
  transition: background 0.4s ease-out, opacity 0.8s ease;
}

.piece::after {
  background: rgba(255, 255, 255, 0);
  mix-blend-mode: screen;
  transition: background 0.8s ease;
}

.piece:hover { transform: scale(1.03); z-index: 3; }
.piece:hover::before { background: linear-gradient(120deg, rgba(255, 255, 255, 0.09), transparent 33%); }

.piece.is-visible { opacity: 1; transform: scale(1); }
.piece.is-visible:hover { transform: scale(1.03); }

.sapphire { --piece-color: #2B4FA3; }
.amethyst { --piece-color: #6B3FA0; }
.emerald { --piece-color: #1A7A5C; }
.ruby { --piece-color: #A3324F; }

.void-piece {
  --piece-color: #0B0E1A;
  box-shadow: inset 0 0 0 1px rgba(139, 146, 168, 0.08);
}

.edge-b { clip-path: polygon(0 0, 100% 0, 100% 100%, calc(50% + 12px) 100%, 50% calc(100% - 10px), calc(50% - 12px) 100%, 0 100%, 0 calc(50% + 12px), 10px 50%, 0 calc(50% - 12px)); }
.edge-c { clip-path: polygon(0 0, 100% 0, 100% calc(50% - 12px), calc(100% - 10px) 50%, 100% calc(50% + 12px), 100% 100%, 0 100%, 0 0); }
.edge-d { clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 0 calc(50% + 12px), 10px 50%, 0 calc(50% - 12px)); }

.piece-label {
  position: absolute;
  top: clamp(0.6rem, 1vw, 0.9rem);
  left: clamp(0.6rem, 1vw, 0.9rem);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(232, 236, 244, 0.6);
  z-index: 2;
}

.piece p {
  position: relative;
  z-index: 2;
  margin: 0;
  max-width: 18ch;
  font-size: clamp(0.875rem, 1.1vw, 1.125rem);
  line-height: 1.7;
  letter-spacing: 0.02em;
  font-weight: 500;
  opacity: 0;
  transform: translateY(0.8rem);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.trace {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: currentColor;
  opacity: 0.02;
  transition: opacity 0.8s ease;
}

.trace path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.trace circle { fill: currentColor; }

.piece-01 { grid-column: span 5; grid-row: span 3; }
.piece-02 { grid-column: span 3; grid-row: span 2; }
.piece-03 { grid-column: span 2; grid-row: span 5; }
.piece-04 { grid-column: span 2; grid-row: span 2; }
.piece-05 { grid-column: span 4; grid-row: span 2; }
.void-piece { grid-column: span 3; grid-row: span 2; }
.piece-07 { grid-column: span 3; grid-row: span 3; }
.piece-08 { grid-column: span 2; grid-row: span 3; }
.piece-09 { grid-column: span 5; grid-row: span 2; }
.piece-10 { grid-column: span 2; grid-row: span 3; }

body.is-illuminate .assemble-title { opacity: 0.08; filter: blur(1px); }
body.is-illuminate .illuminate-title { opacity: 1; transform: translateY(0); }
body.is-illuminate .piece::after { background: rgba(255, 255, 255, 0.08); }
body.is-illuminate .piece p { opacity: 1; transform: translateY(0); }
body.is-illuminate .trace { opacity: 0.12; }
body.is-illuminate .void-piece .trace { animation: voidPulse 4s ease-in-out infinite; }

body.is-win { --grain-opacity: 0.12; }
body.is-win .ceremony { grid-template-rows: 1fr; }
body.is-win .headline-stack { position: absolute; inset: 0; place-items: center; pointer-events: none; }
body.is-win .assemble-title,
body.is-win .illuminate-title { opacity: 0; transform: translateY(-3vh); }
body.is-win .win-title { opacity: 1; transform: scale(1); }
body.is-win .puzzle-grid {
  height: calc(100vh - clamp(2rem, 4vw, 4rem));
  background: linear-gradient(135deg, #2B4FA3 0%, #6B3FA0 52%, #A3324F 100%);
  box-shadow: 0 0 80px rgba(43, 79, 163, 0.26), 0 0 150px rgba(107, 63, 160, 0.18);
}
body.is-win .piece {
  background: linear-gradient(135deg, rgba(43, 79, 163, 0.86), rgba(107, 63, 160, 0.78), rgba(163, 50, 79, 0.86));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
body.is-win .piece-label,
body.is-win .piece p,
body.is-win .trace { opacity: 0; }

.expanded-piece {
  position: fixed;
  inset: clamp(1rem, 3vw, 3rem);
  z-index: 20;
  padding: clamp(1.2rem, 4vw, 4rem);
  display: grid;
  align-content: end;
  gap: 1rem;
  color: var(--frost);
  background: linear-gradient(135deg, rgba(43, 79, 163, 0.96), rgba(107, 63, 160, 0.94), rgba(26, 122, 92, 0.9));
  clip-path: inset(50% 50% 50% 50%);
  pointer-events: none;
  transition: clip-path 0.65s cubic-bezier(0.76, 0, 0.24, 1);
}

.expanded-piece.is-open { clip-path: inset(0 0 0 0); pointer-events: auto; }
.expanded-piece h3 {
  margin: 0;
  font-family: "Outfit", Inter, sans-serif;
  font-size: clamp(3rem, 10vw, 10rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  text-transform: uppercase;
}
.expanded-piece p { max-width: 48rem; margin: 0; font-size: clamp(1rem, 1.4vw, 1.35rem); line-height: 1.7; letter-spacing: 0.02em; }
.expanded-label,
.close-piece { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(232, 236, 244, 0.65); }
.close-piece { position: absolute; top: 1rem; right: 1rem; border: 0; background: transparent; cursor: pointer; }

@keyframes titleAscend {
  0%, 35% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0.2; transform: translateY(-10vh); }
}

@keyframes grainDrift {
  0% { transform: translate3d(0, 0, 0); }
  100% { transform: translate3d(-2%, 1%, 0); }
}

@keyframes voidPulse {
  0%, 100% { opacity: 0.05; }
  50% { opacity: 0.1; }
}

@media (max-width: 820px) {
  .ceremony { grid-template-rows: 0.3fr 1fr; padding: 0.75rem; }
  .puzzle-grid { grid-template-columns: repeat(6, 1fr); }
  .piece-01, .piece-09 { grid-column: span 4; }
  .piece-02, .piece-05, .piece-07, .void-piece { grid-column: span 3; }
  .piece-03, .piece-04, .piece-08, .piece-10 { grid-column: span 2; }
  .piece p { font-size: 0.78rem; line-height: 1.45; }
}
*** Add File: /Volumes/Scratch/Sites/CMassO7/sites/ppuzzl.win-v1/script.js
const body = document.body;
const grid = document.getElementById('puzzle-grid');
const pieces = [...document.querySelectorAll('.piece')];
const illuminateMarker = document.getElementById('illuminate-stage');
const winMarker = document.getElementById('win-stage');
const expanded = document.getElementById('expanded-piece');
const expandedTitle = document.getElementById('expanded-title');
const expandedLabel = document.getElementById('expanded-label');
const closePiece = document.getElementById('close-piece');

const spiralOrder = [0, 4, 5, 1, 6, 3, 8, 2, 7, 9];
spiralOrder.forEach((pieceIndex, order) => {
  const piece = pieces[pieceIndex];
  window.setTimeout(() => piece.classList.add('is-visible'), 800 + order * 80);
});

const observer = new IntersectionObserver((entries) => {
  entries.forEach((entry) => {
    if (entry.target === illuminateMarker) {
      body.classList.toggle('is-illuminate', entry.isIntersecting || window.scrollY > window.innerHeight * 0.65);
    }
    if (entry.target === winMarker) {
      body.classList.toggle('is-win', entry.isIntersecting || window.scrollY > window.innerHeight * 1.65);
    }
  });
}, { threshold: 0.3 });

observer.observe(illuminateMarker);
observer.observe(winMarker);

let ticking = false;
function updateGap() {
  const start = window.innerHeight * 1.8;
  const distance = window.innerHeight * 0.55;
  const progress = Math.min(1, Math.max(0, (window.scrollY - start) / distance));
  const gap = 2 - (2 * progress);
  grid.style.setProperty('--grid-gap', `${gap.toFixed(2)}px`);
  ticking = false;
}

window.addEventListener('scroll', () => {
  if (!ticking) {
    window.requestAnimationFrame(updateGap);
    ticking = true;
  }
});

pieces.forEach((piece) => {
  piece.addEventListener('click', () => {
    if (!body.classList.contains('is-illuminate') || body.classList.contains('is-win')) return;
    expandedTitle.textContent = piece.dataset.title || 'Resolved geometry';
    expandedLabel.textContent = piece.querySelector('.piece-label').textContent;
    expanded.classList.add('is-open');
  });
});

closePiece.addEventListener('click', () => expanded.classList.remove('is-open'));
expanded.addEventListener('click', (event) => {
  if (event.target === expanded) expanded.classList.remove('is-open');
});

updateGap();