:root {
  --ink: #0f0f0f;
  --paper: #f5efe6;
  --accent: #c8522a;
  --muted: #6c665b;
  --line: rgba(15, 15, 15, 0.14);
  --panel: rgba(255, 255, 255, 0.7);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Instrument Sans', sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(15, 15, 15, 0.05) 0.6px, transparent 0.6px);
  background-size: 8px 8px;
  opacity: 0.3;
  z-index: -1;
}

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.project-header {
  padding: 2.25rem 0 2rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1.6rem;
  border-bottom: 1px solid transparent;
}

.back-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.hero-block {
  border: 1px solid var(--line);
  background: linear-gradient(130deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.55));
  padding: 2.25rem;
}

.kicker {
  margin: 0;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0.55rem 0 0.8rem;
  font-family: 'DM Serif Display', serif;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-size: clamp(2rem, 4vw, 3rem);
}

.lead {
  margin: 0;
  max-width: 72ch;
  color: var(--muted);
}

.meta-row {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.pill {
  display: inline-flex;
  padding: 0.26rem 0.64rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-family: 'DM Mono', monospace;
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.content {
  margin-top: 1.25rem;
  display: grid;
  gap: 1rem;
}

.card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 1.4rem 1.5rem;
}

.card h2 {
  margin: 0 0 0.7rem;
  font-family: 'DM Serif Display', serif;
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  letter-spacing: -0.01em;
}

.card h3 {
  margin: 1.1rem 0 0.35rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--accent);
}

.card p {
  margin: 0.45rem 0;
}

.card ul,
.card ol {
  margin: 0.4rem 0 0.4rem 1.3rem;
  padding: 0;
}

.card li {
  margin: 0.36rem 0;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.math {
  margin-top: 0.75rem;
  border-left: 2.5px solid var(--accent);
  padding: 0.55rem 0.7rem;
  background: rgba(200, 82, 42, 0.05);
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  overflow-x: auto;
}

.code {
  margin-top: 0.7rem;
  background: #141414;
  color: #f1f1f1;
  padding: 0.85rem 1rem;
  border-radius: 0;
  overflow-x: auto;
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.55;
}

.path-list {
  margin-top: 0.45rem;
  display: grid;
  gap: 0.34rem;
}

.path-item {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--muted);
}

.lab-grid {
  margin-top: 0.8rem;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1rem;
}

.lab-controls {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  padding: 0.9rem;
  display: grid;
  gap: 0.7rem;
}

.lab-label {
  display: grid;
  gap: 0.3rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.lab-label select,
.lab-label input[type="range"] {
  width: 100%;
}

.lab-label select {
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.45rem 0.5rem;
  font-family: 'Instrument Sans', sans-serif;
  font-size: 0.9rem;
  color: var(--ink);
}

.range-meta {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0;
  text-transform: none;
  font-family: 'Instrument Sans', sans-serif;
}

.lab-actions {
  display: flex;
  gap: 0.6rem;
}

.lab-btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 0.5rem 0.8rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

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

.lab-visual {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  padding: 0.9rem;
}

.mesh-svg {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #f9f3ea);
}

.lab-caption {
  margin-top: 0.55rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.metric-grid {
  margin-top: 0.85rem;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0.6rem;
}

.cluster-grid {
  margin-top: 0.75rem;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.6rem;
}

.metric-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  padding: 0.65rem 0.6rem;
}

.metric-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.62rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.metric-value {
  margin-top: 0.2rem;
  font-family: 'DM Serif Display', serif;
  font-size: 1.35rem;
  line-height: 1.1;
}

.metric-delta {
  margin-top: 0.15rem;
  font-size: 0.75rem;
  color: var(--muted);
}

.metric-delta.up,
.metric-delta.bad {
  color: #9c3022;
}

.metric-delta.down,
.metric-delta.good {
  color: #2f6a43;
}

.metric-delta.neutral {
  color: var(--muted);
}

.mini-chart {
  margin-top: 0.95rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
  padding: 0.75rem;
}

.mini-chart h3 {
  margin: 0 0 0.5rem;
}

.bar-grid {
  display: grid;
  gap: 0.5rem;
}

.bar-row {
  display: grid;
  grid-template-columns: 80px 1fr 58px;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
}

.bar-row.active {
  color: var(--accent);
  font-weight: 600;
}

.bar-track {
  position: relative;
  height: 10px;
  background: rgba(15, 15, 15, 0.08);
}

.bar-fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: 0;
  background: linear-gradient(90deg, #c8522a, #df8e66);
}

.variation-list {
  margin-top: 0.85rem;
  border: 1px dashed var(--line);
  background: rgba(255, 255, 255, 0.55);
  padding: 0.7rem 0.8rem;
}

.variation-list h3 {
  margin: 0 0 0.35rem;
}

.variation-list ul {
  margin: 0.2rem 0 0 1rem;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 0.7rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.table th,
.table td {
  text-align: left;
  padding: 0.55rem 0.5rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.table th {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.note {
  margin-top: 0.7rem;
  padding: 0.65rem 0.75rem;
  border: 1px dashed var(--line);
  font-size: 0.92rem;
  background: rgba(255, 255, 255, 0.5);
}

.footer {
  margin-top: 1.4rem;
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.footer a {
  color: inherit;
}

@media (max-width: 860px) {
  .hero-block {
    padding: 1.45rem;
  }

  .lab-grid {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cluster-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .two-col {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 1.15rem 1.05rem;
  }

  .page {
    padding: 0 1rem 3rem;
  }
}