.work-page {
  --serif: "Newsreader", Georgia, serif;
  --mono: "IBM Plex Mono", monospace;
}

/* ═══════════════════════════════════════════════════
   WORK LAYOUT (WITH STICKY INDEX)
═══════════════════════════════════════════════════ */
.work-dossier {
  display: grid;
  grid-template-columns: 140px 1fr;
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px 40px;
  gap: 80px;
  position: relative;
}

.work-index {
  position: sticky;
  top: 120px;
  align-self: start;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.w-idx-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
  display: inline-block;
  width: max-content;
}
.w-idx-link:hover {
  color: var(--ink);
}
.w-idx-link.active {
  color: var(--accent);
  font-weight: 600;
}
.w-idx-link.active::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.work-content {
  min-width: 0; /* prevents grid blowout */
}

/* ═══════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════ */
.w-hero {
  padding-bottom: 80px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 80px;
}
.w-eyebrow {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 32px;
}
.w-title {
  font-family: var(--serif);
  font-size: clamp(48px, 7vw, 100px);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.02em;
  max-width: 900px;
  margin: 0 0 32px;
}
.w-desc {
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 600px;
  margin: 0 0 48px;
}
.w-meta {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--ink);
  text-transform: uppercase;
}

/* ═══════════════════════════════════════════════════
   SHARED PROJECT STYLES
═══════════════════════════════════════════════════ */
.project-sec {
  padding-bottom: 40px;
  margin-bottom: 60px;
  border-bottom: 1px solid var(--line);
}
.p-header {
  margin-bottom: 60px;
}
.p-title {
  font-family: var(--serif);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--ink);
}
.p-subtitle {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  margin: 0 0 40px;
}
.p-question {
  font-size: 24px;
  line-height: 1.4;
  color: var(--ink);
  max-width: 700px;
  margin: 0;
}
.p-stack {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

/* ═══════════════════════════════════════════════════
   DIAGRAM INTERACTION SYSTEM
═══════════════════════════════════════════════════ */
.diagram-container {
  position: relative;
  display: flex;
  flex-direction: column;
}
.diagram-nodes {
  display: flex;
  flex-direction: column;
  transition: opacity 0.3s ease;
}
.diagram-container.is-interacting .diagram-node {
  opacity: 0.3;
}
.diagram-container.is-interacting .diagram-node.is-active {
  opacity: 1;
  transform: scale(1.02);
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  z-index: 2;
}
.diagram-node {
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}
.diagram-caption {
  margin-top: 24px;
  min-height: 40px; /* Prevents layout shift */
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--muted);
  text-align: center;
  transition: color 0.3s ease;
}
.diagram-container.is-interacting .diagram-caption {
  color: var(--ink);
}

/* ═══════════════════════════════════════════════════
   PROJECT 01 : PRICE PREDICTION (Model/Data)
═══════════════════════════════════════════════════ */
.p1-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.p1-result-strip {
  display: flex;
  gap: 40px;
  padding: 32px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  margin-bottom: 40px;
}
.p1-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.p1-sv {
  font-family: var(--serif);
  font-size: 40px;
  line-height: 1;
}
.p1-sl {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--muted);
  letter-spacing: 0.1em;
}
.p1-copy h4 {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin: 0 0 12px;
  text-transform: uppercase;
}
.p1-copy p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 40px;
}
.p1-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.p1-features li {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
  padding-left: 20px;
  position: relative;
}
.p1-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* P1 Flow Diagram */
.p1-flow {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 40px;
}
.p1-flow .diagram-nodes {
  gap: 20px;
}
.p1-node {
  padding: 16px 24px;
  border: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
  background: var(--paper);
  opacity: 0.3;
  transform: translateY(10px);
  transition: all 0.5s ease;
}
.p1-arrow {
  text-align: center;
  color: var(--accent);
  opacity: 0.3;
  transition: all 0.5s ease;
}
.p1-node.active, .p1-arrow.active {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════════
   PROJECT 02 : AI PIPELINE (Architecture)
═══════════════════════════════════════════════════ */
.p2-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: 60px;
  align-items: start;
}
.p2-arch {
  margin: 40px 0;
}
.p2-arch .diagram-nodes {
  align-items: center;
  gap: 16px;
}
.p2-node {
  font-family: var(--serif);
  font-size: 28px;
  padding: 20px 40px;
  background: var(--white);
  border: 1px solid var(--ink);
  width: 100%;
  text-align: center;
}
.p2-arrow {
  font-size: 24px;
  color: var(--accent);
}
.p2-copy {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 600px;
}

/* Sticky Metadata Panel */
.p2-meta-panel {
  position: sticky;
  top: 120px;
  background: var(--ink);
  color: var(--paper);
  padding: 32px 24px;
}
.p2-meta-title {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin: 0 0 24px;
}
.p2-meta-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.p2-meta-list span {
  font-size: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.p2-meta-list span:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* ═══════════════════════════════════════════════════
   PROJECT 03 : MLS PIPELINE (Scale)
═══════════════════════════════════════════════════ */
.p3-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 80px;
}
.p3-scale-box {
  border-left: 2px solid var(--accent);
  padding-left: 32px;
}
.p3-scale-num {
  font-family: var(--serif);
  font-size: clamp(64px, 8vw, 140px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.p3-scale-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-top: 16px;
}
.p3-desc {
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  max-width: 800px;
  margin: 0 0 40px;
}
.p3-attr {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 40px;
}
.p3-attr .diagram-nodes {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  flex-direction: row; /* override column default */
}
.p3-attr-node {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 8px; /* padding for hover target */
}
.p3-attr-plus {
  color: var(--accent);
  font-size: 18px;
}
.p3-attr-result {
  width: 100%;
  text-align: center;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px dashed var(--line);
  font-family: var(--serif);
  font-size: 32px;
  color: var(--ink);
}
.p3-callouts {
  display: flex;
  gap: 24px;
  margin-top: 32px;
}
.p3-callout {
  font-family: var(--mono);
  font-size: 10px;
  padding: 12px 20px;
  background: var(--soft);
  color: var(--ink);
}

/* ═══════════════════════════════════════════════════
   FINAL SECTION
═══════════════════════════════════════════════════ */
.work-lessons {
  padding-bottom: 120px;
}
.wl-heading {
  font-family: var(--serif);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 300;
  line-height: 1.05;
  margin: 0 0 80px;
}
.wl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.wl-item {
  border-top: 2px solid var(--ink);
  padding-top: 24px;
}
.wl-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 0 0 20px;
}
.wl-copy {
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
  margin: 0;
}

/* ═══════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════ */
@media (max-width: 1100px) {
  .work-dossier { grid-template-columns: 1fr; padding: 60px 32px; }
  .work-index { display: none; } /* Hide sticky index on tablet/mobile */
  .p1-grid, .p2-layout, .p3-hero, .wl-grid { grid-template-columns: 1fr; gap: 40px; }
  .p2-meta-panel { position: static; }
}

@media (max-width: 720px) {
  .work-dossier { padding: 40px 24px; }
  .p1-result-strip { flex-direction: column; gap: 24px; }
  .p3-attr .diagram-nodes { flex-direction: column; align-items: flex-start; }
  .p3-attr-plus { transform: rotate(90deg); }
  .p3-callouts { flex-direction: column; gap: 12px; }
}