:root {
  --bg-0: #071012;
  --bg-1: #0e1d20;
  --surface: #132b30;
  --surface-alt: #18363b;
  --text: #e9f5f4;
  --muted: #b8cecc;
  --line: rgba(197, 236, 232, 0.24);
  --accent: #ffcb68;
  --accent-alt: #54eec9;
  --accent-dark: #2f250d;
  --radius: 20px;
  --radius-sm: 14px;
  --max-width: 1120px;
  --shadow: 0 14px 42px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at 15% -10%, rgba(84, 238, 201, 0.18), transparent 38%),
    radial-gradient(circle at 85% 4%, rgba(255, 203, 104, 0.14), transparent 34%),
    linear-gradient(165deg, var(--bg-0) 0%, var(--bg-1) 56%, #081114 100%);
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.06;
  background-image: radial-gradient(circle at 2px 2px, #fff 0.75px, transparent 0);
  background-size: 4px 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  background: rgba(10, 24, 27, 0.78);
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-family: "Syne", sans-serif;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.brand-dot {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--accent), var(--accent-alt));
  box-shadow: 0 0 0 5px rgba(255, 203, 104, 0.15);
}

.menu-toggle {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: var(--surface);
  padding: 0.42rem 0.86rem;
  font-weight: 600;
  cursor: pointer;
}

.main-nav {
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: calc(100% + 0.55rem);
  display: none;
  flex-direction: column;
  gap: 0.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.65rem;
  background: rgba(16, 39, 43, 0.97);
  box-shadow: var(--shadow);
}

.main-nav.open {
  display: flex;
}

.main-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.52rem 0.62rem;
  border-radius: 10px;
  font-weight: 500;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  background: rgba(84, 238, 201, 0.14);
}

.main-nav a.active {
  background: rgba(255, 203, 104, 0.18);
  color: #fff8e8;
}

main,
.site-footer {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding-inline: 1rem;
}

.section {
  padding-block: 3.2rem;
}

.hero,
.page-hero {
  position: relative;
  isolation: isolate;
}

.hero::before,
.page-hero::before {
  content: "";
  position: absolute;
  inset: auto auto 5% -2%;
  width: 54%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(84, 238, 201, 0.12), transparent 70%);
  z-index: -1;
}

.kicker {
  margin: 0 0 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-alt);
}

h1,
h2,
h3 {
  font-family: "Syne", sans-serif;
  line-height: 1.08;
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 8.4vw, 3.9rem);
  max-width: 19ch;
}

h2 {
  font-size: clamp(1.5rem, 6vw, 2.6rem);
  margin-bottom: 0.85rem;
}

h3 {
  font-size: clamp(1.1rem, 4vw, 1.45rem);
  margin-bottom: 0.5rem;
}

p,
li,
td,
th {
  color: var(--muted);
  line-height: 1.62;
  margin: 0;
}

strong {
  color: var(--text);
}

.lead {
  margin-top: 1rem;
  max-width: 66ch;
}

.hero-actions {
  margin-top: 1.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.7rem 1.08rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(145deg, var(--accent), #ffe2a2);
  color: var(--accent-dark);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: transparent;
}

.section-head {
  max-width: 70ch;
  margin-bottom: 1.25rem;
}

.cards {
  display: grid;
  gap: 0.85rem;
}

.card {
  background: linear-gradient(165deg, rgba(22, 49, 55, 0.95), rgba(11, 28, 32, 0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem;
}

.card p + p {
  margin-top: 0.6rem;
}

.text-link {
  display: inline-block;
  margin-top: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  color: #ffe7b4;
}

.meta {
  color: #d3ece9;
  font-size: 0.95rem;
}

.accent-border {
  border-left: 4px solid rgba(84, 238, 201, 0.42);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.timeline li {
  border-left: 3px solid rgba(84, 238, 201, 0.32);
  padding: 0.3rem 0 0.3rem 0.9rem;
}

.lab {
  display: grid;
  gap: 1rem;
  background: linear-gradient(180deg, rgba(24, 53, 59, 0.95), rgba(10, 27, 31, 0.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
}

.lab-controls {
  display: grid;
  gap: 0.78rem;
}

label {
  display: grid;
  gap: 0.42rem;
  color: var(--text);
  font-weight: 600;
}

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

select {
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #0a1d21;
  color: var(--text);
  padding: 0.54rem 0.63rem;
}

input[type="range"] {
  accent-color: var(--accent);
}

.lab-actions {
  display: grid;
  gap: 0.64rem;
  align-content: start;
}

.status {
  font-size: 0.95rem;
}

.callout {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(23, 50, 57, 0.9), rgba(13, 31, 36, 0.96));
  box-shadow: var(--shadow);
  padding: 1.15rem;
}

.callout.compact {
  max-width: 74ch;
}

.bullet-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.34rem;
}

.glossary-grid {
  display: grid;
  gap: 0.8rem;
}

.term-card {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(17, 39, 43, 0.84);
  padding: 1rem;
}

.term-card h3 {
  font-size: 1.12rem;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(14, 33, 37, 0.9);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
}

th,
td {
  text-align: left;
  padding: 0.78rem 0.9rem;
  border-bottom: 1px solid rgba(197, 236, 232, 0.14);
}

th {
  color: #e8f8f6;
  font-family: "Syne", sans-serif;
  font-size: 0.96rem;
  background: rgba(84, 238, 201, 0.08);
}

.chain-grid,
.recipe-grid {
  display: grid;
  gap: 0.8rem;
}

.chain-card,
.recipe-card {
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(16, 38, 43, 0.92);
  padding: 1rem;
}

code {
  display: inline-block;
  border-radius: 8px;
  border: 1px solid rgba(255, 203, 104, 0.25);
  background: rgba(10, 24, 27, 0.72);
  color: #ffe9bd;
  padding: 0.2rem 0.35rem;
  font-family: "IBM Plex Sans", monospace;
  font-size: 0.92rem;
}

.recipe-detail {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(16, 39, 44, 0.9);
  box-shadow: var(--shadow);
  padding: 1.05rem;
  display: grid;
  gap: 0.72rem;
}

.recipe-detail ol {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.32rem;
}

.site-footer {
  padding-block: 2rem 2.8rem;
}

.site-footer h2 {
  margin-bottom: 0.5rem;
}

.site-footer p + p {
  margin-top: 0.42rem;
}

.site-footer a {
  color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 550ms ease, transform 650ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 760px) {
  .menu-toggle {
    display: none;
  }

  .site-header {
    align-items: flex-start;
    padding: 1rem 1.25rem;
  }

  .main-nav {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    border: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
    max-width: 75%;
  }

  .main-nav a {
    white-space: nowrap;
  }

  .section {
    padding-block: 4.3rem;
  }

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

  .cards.three-col {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .lab {
    grid-template-columns: 2fr 1fr;
    padding: 1.25rem;
    gap: 1.2rem;
  }

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

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

  .recipe-detail {
    padding: 1.2rem;
  }
}

@media (min-width: 1080px) {
  .site-header {
    align-items: center;
    padding-inline: 1.5rem;
  }

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

  .glossary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .chain-grid,
  .recipe-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
  }
}