:root {
  --ink: #1a1610;
  --brass: #b8924a;
  --brass-dim: #8a6b34;
  --brass-glow: #d4a85c;
  --navy: #12181f;
  --navy-mid: #1c2630;
  --navy-light: #263545;
  --rule: rgba(184, 146, 74, 0.22);
  --rule-strong: rgba(184, 146, 74, 0.5);
  --cream: #e8dfc8;
  --cream-dim: #c8bfa8;
  --serif: "Cormorant Garamond", Georgia, serif;
  --mono: "JetBrains Mono", "Courier New", monospace;
  --body: "Libre Baskerville", Georgia, serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--navy);
  color: var(--cream);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.55;
}

::-webkit-scrollbar {
  width: 5px;
}

::-webkit-scrollbar-track {
  background: var(--navy);
}

::-webkit-scrollbar-thumb {
  background: var(--brass-dim);
  border-radius: 3px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 56px;
}

.section-eyebrow {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brass);
  white-space: nowrap;
}

.section-rule {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 3.8vw, 3rem);
  font-weight: 300;
  color: var(--cream);
  line-height: 1.15;
  margin-bottom: 14px;
}

.section-title em {
  font-style: italic;
  color: var(--brass);
}

.masthead {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 80px 24px;
  overflow: hidden;
}

.masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 100%);
  pointer-events: none;
}

.masthead-spine {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--rule-strong) 20%, var(--rule-strong) 80%, transparent);
  transform: translateX(-50%);
}

.masthead-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.masthead-eyebrow {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--brass);
  text-transform: uppercase;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.2s forwards;
}

.masthead-title {
  font-family: var(--serif);
  font-size: clamp(3.2rem, 8.5vw, 7.5rem);
  font-weight: 300;
  line-height: 1;
  color: var(--cream);
  margin-bottom: 6px;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.4s forwards;
}

.masthead-title em {
  font-style: italic;
  color: var(--brass);
}

.masthead-sub {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2.2vw, 1.4rem);
  font-weight: 300;
  font-style: italic;
  color: var(--cream-dim);
  margin-bottom: 48px;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 0.6s forwards;
}

.masthead-rule {
  width: 100px;
  height: 1px;
  margin: 0 auto 36px;
  background: linear-gradient(90deg, transparent, var(--brass), transparent);
  opacity: 0;
  animation: fadeIn 0.9s var(--ease) 0.8s forwards;
}

.masthead-stats {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  color: var(--cream-dim);
  text-transform: uppercase;
  opacity: 0;
  animation: fadeUp 0.9s var(--ease) 1s forwards;
}

.masthead-stats span {
  color: var(--brass);
}

.scroll-cue {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeIn 1s var(--ease) 1.4s forwards;
}

.scroll-line {
  width: 1px;
  height: 44px;
  background: linear-gradient(to bottom, var(--brass), transparent);
  animation: pulse 2s ease-in-out infinite;
}

.scroll-label {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  color: var(--brass-dim);
  text-transform: uppercase;
}

.about {
  background: var(--navy-mid);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 80px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  align-items: start;
}

.about-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--brass);
  text-transform: uppercase;
  padding-top: 4px;
  border-top: 1px solid var(--rule-strong);
}

.about-body {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 300;
  line-height: 1.7;
  color: var(--cream);
}

.about-body strong {
  font-weight: 500;
  color: var(--brass);
}

.about-body p + p {
  margin-top: 1.2em;
}

.format {
  padding: 96px 0;
}

.format-intro {
  font-size: 0.93rem;
  color: var(--cream-dim);
  max-width: 600px;
  margin-bottom: 48px;
  line-height: 1.8;
}

.format-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.format-card {
  background: var(--navy-mid);
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
}

.format-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brass), transparent);
}

.format-card-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  color: var(--brass);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.format-card-title {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--cream);
  margin-bottom: 14px;
}

.format-card-desc {
  font-size: 0.88rem;
  color: var(--cream-dim);
  line-height: 1.7;
  margin-bottom: 24px;
}

.format-steps {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.format-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.08em;
  color: var(--cream-dim);
}

.step-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--brass);
  flex-shrink: 0;
  margin-top: 5px;
}

.blocks {
  background: var(--navy-mid);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 96px 0;
}

.block-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 2px;
  margin-top: 56px;
}

.block-card {
  position: relative;
  background: var(--navy);
  padding: 32px 28px;
  cursor: pointer;
  transition: background 0.22s ease, transform 0.22s ease;
  text-decoration: none;
  display: block;
  overflow: hidden;
}

.block-card:hover {
  background: var(--navy-light);
  transform: translateY(-2px);
}

.block-accent {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--brass), transparent);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.block-card:hover .block-accent {
  opacity: 1;
}

.block-num {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.18em;
  color: var(--brass-dim);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.block-name {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--cream);
  line-height: 1.25;
  margin-bottom: 7px;
}

.block-tagline {
  font-size: 0.8rem;
  color: var(--cream-dim);
  font-style: italic;
  margin-bottom: 18px;
}

.block-count {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.browser {
  padding: 96px 0;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 48px 0 40px;
}

.filter-btn {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 7px 14px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--cream-dim);
  cursor: pointer;
  transition: all 0.18s ease;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--brass);
  color: var(--brass);
  background: rgba(184, 146, 74, 0.06);
}

.entry {
  border-bottom: 1px solid var(--rule);
}

.entry:first-child {
  border-top: 1px solid var(--rule);
}

.entry-header {
  display: grid;
  grid-template-columns: 56px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 22px 0;
  cursor: pointer;
  transition: color 0.18s ease;
}

.entry-header:hover .entry-principle {
  color: var(--brass);
}

.entry-num {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  color: var(--brass-dim);
  text-align: right;
}

.entry-titles {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.entry-principle {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--cream);
  line-height: 1.3;
  transition: color 0.18s ease;
}

.entry-application {
  font-family: var(--body);
  font-size: 0.78rem;
  color: var(--cream-dim);
  font-style: italic;
}

.entry-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 0.52rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 3px 7px;
  border: 1px solid var(--rule);
  color: var(--cream-dim);
  white-space: nowrap;
}

.tag-direct {
  border-color: rgba(100, 160, 220, 0.3);
  color: rgba(100, 160, 220, 0.7);
}

.tag-tool {
  border-color: rgba(184, 146, 74, 0.4);
  color: rgba(184, 146, 74, 0.8);
}

.tag-stress {
  border-color: rgba(200, 100, 100, 0.3);
  color: rgba(200, 100, 100, 0.65);
}

.tag-series {
  border-color: rgba(120, 190, 130, 0.3);
  color: rgba(120, 190, 130, 0.7);
}

.chevron {
  font-size: 0.65rem;
  color: var(--brass-dim);
  transition: transform 0.28s ease;
  flex-shrink: 0;
}

.entry-header.open .chevron {
  transform: rotate(180deg);
}

.entry-spread {
  display: none;
  border-top: 1px solid var(--rule);
}

.entry-spread.open {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.spread-panel {
  padding: 36px 32px;
}

.spread-panel:first-child {
  border-right: 1px solid var(--rule);
}

.panel-label {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass);
  margin-bottom: 10px;
}

.panel-title {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--cream);
  line-height: 1.3;
  margin-bottom: 24px;
}

.panel-section {
  margin-bottom: 18px;
}

.panel-section-label {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--brass-dim);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}

.panel-section-text {
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--cream-dim);
}

.panel-section-text strong {
  color: var(--cream);
  font-weight: 700;
}

.panel-section-text em {
  color: var(--cream);
  font-style: italic;
}

.principles {
  background: var(--navy-mid);
  border-top: 1px solid var(--rule);
  padding: 96px 0;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1px;
  background: var(--rule);
  margin-top: 56px;
}

.principle-cell {
  background: var(--navy-mid);
  padding: 22px 18px;
  transition: background 0.18s ease;
  cursor: default;
}

.principle-cell:hover {
  background: var(--navy-light);
}

.principle-num {
  font-family: var(--mono);
  font-size: 0.53rem;
  letter-spacing: 0.14em;
  color: var(--brass-dim);
  margin-bottom: 6px;
}

.principle-name {
  font-family: var(--serif);
  font-size: 0.92rem;
  color: var(--cream);
  line-height: 1.3;
}

.footer {
  border-top: 1px solid var(--rule);
  padding: 60px 24px;
  text-align: center;
}

.footer-title {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--cream);
  margin-bottom: 6px;
}

.footer-title em {
  font-style: italic;
  color: var(--brass);
}

.footer-sub {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.17em;
  text-transform: uppercase;
  color: var(--cream-dim);
  margin-bottom: 32px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-link {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass-dim);
  text-decoration: none;
  transition: color 0.18s ease;
}

.footer-link:hover {
  color: var(--brass);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--cream-dim);
  opacity: 0.45;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scaleY(1);
    opacity: 0.5;
  }

  50% {
    transform: scaleY(1.25);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .format-cards {
    grid-template-columns: 1fr;
  }

  .entry-spread.open {
    grid-template-columns: 1fr;
  }

  .spread-panel:first-child {
    border-right: none;
    border-bottom: 1px solid var(--rule);
  }

  .entry-header {
    grid-template-columns: 44px 1fr;
  }

  .entry-meta {
    display: none;
  }
}