:root {
  --premium-shadow: 0 22px 54px rgba(42, 25, 18, 0.14);
  --premium-ease: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 24%, transparent) 1px, transparent 1px) 0 0 / 84px 84px,
    linear-gradient(180deg, var(--bg), oklch(96% 0.008 92));
}

.site-header {
  overflow: visible;
  border-bottom: 0;
  background:
    radial-gradient(circle at var(--nav-x, 50%) var(--nav-y, 50%), color-mix(in oklch, var(--gold) 20%, transparent) 0, transparent 28%),
    color-mix(in oklch, var(--bg) 91%, white 9%);
  box-shadow: 0 1px 0 color-mix(in oklch, var(--fg) 16%, transparent);
  transition:
    background var(--motion-base) var(--premium-ease),
    box-shadow var(--motion-base) var(--premium-ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--fg), var(--accent), var(--gold), var(--fg));
  opacity: 0.88;
}

.site-header.is-scrolled {
  background:
    radial-gradient(circle at var(--nav-x, 50%) var(--nav-y, 50%), color-mix(in oklch, var(--gold) 15%, transparent) 0, transparent 24%),
    color-mix(in oklch, var(--surface) 94%, var(--bg) 6%);
  box-shadow: 0 14px 38px rgba(31, 22, 17, 0.12);
}

.nav-wrap {
  min-height: 96px;
  gap: clamp(18px, 3vw, 42px);
}

.site-header .brand {
  min-width: 220px;
  gap: 14px;
  font-size: 14px;
}

.site-header .brand span:last-child {
  display: grid;
}

.site-header .brand span:last-child::after {
  content: "книжный магазин · издательство";
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font: 500 11px/1 var(--font-body);
  letter-spacing: 0.04em;
  text-transform: none;
}

.site-header .brand-mark {
  position: relative;
  width: 58px;
  height: 58px;
  border-color: color-mix(in oklch, var(--fg) 80%, var(--gold));
  background:
    linear-gradient(135deg, var(--fg), color-mix(in oklch, var(--accent) 54%, var(--fg)));
  box-shadow: inset 0 0 0 7px color-mix(in oklch, white 8%, transparent);
  font-size: 24px;
  transition:
    transform var(--motion-base) var(--premium-ease),
    box-shadow var(--motion-base) var(--premium-ease);
}

.site-header .brand-mark::before,
.site-header .brand-mark::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.site-header .brand-mark::before {
  inset: 10px 12px;
  border-top: 1px solid color-mix(in oklch, white 52%, transparent);
  border-bottom: 1px solid color-mix(in oklch, white 34%, transparent);
}

.site-header .brand-mark::after {
  top: 11px;
  bottom: 11px;
  left: 16px;
  width: 1px;
  background: color-mix(in oklch, white 34%, transparent);
}

.site-header .brand:hover .brand-mark {
  transform: translateY(-2px) rotate(-1deg);
  box-shadow:
    inset 0 0 0 7px color-mix(in oklch, white 10%, transparent),
    0 14px 28px rgba(74, 30, 29, 0.18);
}

.nav-links {
  gap: 5px;
  padding: 6px;
  border: 1px solid color-mix(in oklch, var(--border) 82%, white);
  background: color-mix(in oklch, var(--surface) 82%, transparent);
}

.nav-links a {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 13px;
  color: color-mix(in oklch, var(--fg) 72%, var(--muted));
  font-size: 13px;
  letter-spacing: 0.03em;
  transition:
    color var(--motion-fast) linear,
    background var(--motion-fast) linear,
    transform var(--motion-base) var(--premium-ease);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--fg);
  background: color-mix(in oklch, var(--gold) 14%, var(--surface));
  transform: translateY(-1px);
}

.nav-links a::after {
  right: 13px;
  bottom: 8px;
  left: 13px;
  background: color-mix(in oklch, var(--accent) 70%, var(--gold));
}

.nav-icon,
.button-icon,
.visual-icon,
.article-icon {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  color: var(--accent);
}

.nav-icon {
  width: 17px;
  height: 17px;
}

.nav-icon svg,
.button-icon svg,
.visual-icon svg,
.article-icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
}

.nav-actions {
  gap: 8px;
}

.mega-menu {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  z-index: 60;
  width: min(1120px, calc(100vw - 44px));
  display: grid;
  grid-template-columns: 1.15fr 1.15fr 0.8fr;
  gap: 18px;
  padding: 18px;
  border: 1px solid color-mix(in oklch, var(--fg) 16%, var(--border));
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--gold) 10%, transparent), transparent 40%),
    color-mix(in oklch, var(--surface) 96%, white);
  box-shadow: 0 28px 70px rgba(31, 22, 17, 0.18);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate3d(-50%, -8px, 0);
  transition:
    opacity var(--motion-base) var(--premium-ease),
    transform var(--motion-base) var(--premium-ease),
    visibility 0s linear var(--motion-base);
}

.site-header:hover .mega-menu,
.site-header:focus-within .mega-menu,
body.nav-open .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate3d(-50%, 0, 0);
  transition-delay: 0s;
}

.mega-feature,
.mega-routes,
.mega-proof {
  min-width: 0;
  border: 1px solid color-mix(in oklch, var(--border) 82%, white);
  background: color-mix(in oklch, var(--bg) 72%, var(--surface));
}

.mega-feature {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 16px;
}

.mega-cover {
  min-height: 164px;
  border: 1px solid color-mix(in oklch, var(--fg) 18%, var(--border));
  background:
    linear-gradient(180deg, rgba(20, 14, 11, 0.03), rgba(20, 14, 11, 0.24)),
    url("images/covers/proof-03-light-formula.webp") center / cover no-repeat;
  box-shadow: 0 20px 34px rgba(42, 25, 18, 0.14);
  transform-origin: 50% 80%;
  transition: transform var(--motion-base) var(--premium-ease);
}

.mega-feature:hover .mega-cover {
  transform: rotate(-1.5deg) translateY(-2px);
}

.mega-feature h3 {
  margin-bottom: 8px;
  font-size: clamp(28px, 2.6vw, 40px);
}

.mega-routes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  background: color-mix(in oklch, var(--border) 80%, white);
}

.mega-card {
  min-height: 132px;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-content: start;
  padding: 18px;
  background: color-mix(in oklch, var(--surface) 94%, white);
  transition:
    background var(--motion-fast) linear,
    transform var(--motion-base) var(--premium-ease);
}

.mega-card:hover {
  background: color-mix(in oklch, var(--gold) 13%, var(--surface));
  transform: translate3d(0, -2px, 0);
}

.mega-card .visual-icon {
  grid-row: 1 / span 2;
  width: 42px;
  height: 42px;
}

.mega-card strong,
.mega-card span {
  grid-column: 2;
}

.mega-card strong {
  font: 700 15px/1.2 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.mega-card span,
.mega-proof p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.mega-proof {
  display: grid;
  align-content: space-between;
  padding: 18px;
}

.mega-proof strong {
  color: var(--accent);
  font: 700 38px/1 var(--font-display);
}

.mega-meter {
  height: 118px;
  border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--border));
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 62%, transparent) 1px, transparent 1px) 0 0 / 16px 100%,
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 94%, white), color-mix(in oklch, var(--surface-2) 78%, white));
  overflow: hidden;
}

.mega-meter span {
  display: block;
  width: var(--value);
  height: 100%;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--accent) 84%, var(--fg)), color-mix(in oklch, var(--gold) 74%, var(--accent)));
  transform-origin: left;
}

.site-header:not(.is-ready) .mega-meter span {
  transform: scaleX(0.12);
}

.site-header.is-ready .mega-meter span {
  transform: scaleX(1);
  transition: transform 820ms var(--premium-ease) 280ms;
}

.meta-pill,
.cart-pill {
  min-height: 42px;
  padding: 10px 13px;
  border-radius: 2px;
  background: color-mix(in oklch, var(--surface) 92%, transparent);
  transition:
    transform var(--motion-fast) var(--premium-ease),
    border-color var(--motion-fast) linear,
    background var(--motion-fast) linear;
}

.meta-pill:hover,
.cart-pill:hover {
  transform: translateY(-1px);
  border-color: color-mix(in oklch, var(--accent) 44%, var(--border));
}

.meta-pill::before,
.cart-pill::before {
  content: "";
  width: 8px;
  height: 8px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  opacity: 0.7;
}

.cart-pill {
  color: white;
  border-color: var(--accent);
  background: var(--accent);
}

.cart-pill strong {
  color: var(--fg);
  background: var(--surface);
}

.section {
  padding: clamp(40px, 5.4vw, 76px) 0;
}

.section-tight {
  padding: clamp(26px, 4vw, 52px) 0;
}

.section,
.section-tight {
  border-top: 1px solid color-mix(in oklch, var(--fg) 8%, transparent);
}

.hero + .section,
.page-hero + .section,
.page-hero + .section-tight {
  border-top: 0;
}

.split {
  gap: clamp(28px, 5vw, 76px);
}

.price-row:has(h2),
.diagram-header {
  position: relative;
}

.price-row:has(h2)::after,
.diagram-header::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -12px;
  left: 0;
  height: 1px;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--fg) 28%, transparent), transparent 72%);
}

.panel,
.card,
.checkout-card,
.order-summary,
.fund-calculator,
.audio-player,
.reader-preview,
.sidebar,
.filter-box,
.toolbar {
  border-radius: 2px;
}

.panel h2,
.order-summary h3,
.fund-calculator h3,
.audio-player h3,
.reader-preview h3 {
  text-wrap: balance;
}

.hero,
.page-hero {
  position: relative;
  overflow: hidden;
}

.page-hero {
  background:
    linear-gradient(90deg, var(--bg) 0 54%, color-mix(in oklch, var(--bg) 82%, transparent) 64% 100%),
    url("images/hero/proof-press-page-hero-crop.webp") right center / auto 100% no-repeat;
}

.hero::before,
.page-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.hero::before {
  top: 9%;
  right: max(18px, 4vw);
  width: min(34vw, 430px);
  height: min(44vw, 520px);
  border: 1px solid color-mix(in oklch, var(--accent) 24%, transparent);
  opacity: 0.28;
  transform: rotate(4deg);
}

.page-hero::after {
  top: 22%;
  right: max(22px, 6vw);
  width: min(28vw, 380px);
  height: 230px;
  opacity: 0.16;
  background:
    linear-gradient(90deg, var(--accent) 0 16%, transparent 16% 20%, var(--fg) 20% 38%, transparent 38% 42%, var(--gold) 42% 58%, transparent 58% 62%, var(--accent-2) 62% 82%, transparent 82%),
    linear-gradient(0deg, transparent 74%, var(--fg) 74% 77%, transparent 77%);
  transform: rotate(-3deg);
}

.hero-panel {
  min-height: 620px;
  background:
    linear-gradient(180deg, rgba(17, 13, 10, 0.02), rgba(17, 13, 10, 0.46)),
    url("images/hero/proof-press-editorial-shelf.webp") center / cover no-repeat;
  background-position: center calc(50% + var(--hero-pan, 0px));
  box-shadow: var(--premium-shadow);
}

.hero-panel::after {
  content: "";
  position: absolute;
  right: 34px;
  bottom: 86px;
  width: 140px;
  height: 140px;
  border: 1px solid color-mix(in oklch, white 28%, transparent);
  border-radius: 50%;
  background:
    radial-gradient(circle, transparent 0 38%, color-mix(in oklch, white 15%, transparent) 39% 40%, transparent 41%),
    conic-gradient(from 20deg, transparent 0 16%, color-mix(in oklch, var(--gold) 50%, transparent) 16% 18%, transparent 18% 66%, color-mix(in oklch, white 28%, transparent) 66% 68%, transparent 68%);
  opacity: 0.72;
}

.hero-panel .shelf-visual {
  opacity: 0;
  pointer-events: none;
}

.stats-row,
.feature-grid,
.book-grid,
.article-grid,
.dashboard-grid {
  gap: clamp(16px, 2vw, 24px);
}

.stat,
.feature,
.panel,
.card,
.checkout-card,
.order-summary,
.fund-calculator,
.audio-player,
.reader-preview {
  box-shadow: 0 1px 0 color-mix(in oklch, white 72%, transparent);
}

.stat {
  position: relative;
  min-height: 148px;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px 16px;
  align-items: start;
  border: 1px solid color-mix(in oklch, var(--border) 84%, white);
  background:
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 96%, white), color-mix(in oklch, var(--surface-2) 80%, white));
}

.stat strong,
.stat span {
  grid-column: 2;
}

.stat .visual-icon {
  grid-row: 1 / span 2;
}

.feature {
  position: relative;
  min-height: 220px;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px 18px;
  align-content: start;
  padding: 24px;
  overflow: hidden;
  border: 1px solid color-mix(in oklch, var(--border) 86%, white);
  background:
    linear-gradient(135deg, color-mix(in oklch, var(--surface) 94%, white), color-mix(in oklch, var(--surface-2) 72%, white));
  transition:
    transform var(--motion-base) var(--premium-ease),
    border-color var(--motion-base) linear,
    box-shadow var(--motion-base) var(--premium-ease);
}

.feature::after {
  content: "";
  position: absolute;
  right: -32px;
  bottom: -42px;
  width: 146px;
  height: 146px;
  border: 1px solid color-mix(in oklch, var(--accent) 22%, transparent);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 48%, color-mix(in oklch, var(--accent) 18%, transparent) 49% 51%, transparent 52%),
    linear-gradient(0deg, transparent 48%, color-mix(in oklch, var(--accent) 18%, transparent) 49% 51%, transparent 52%);
  opacity: 0.58;
}

.feature:hover {
  transform: translateY(-3px);
  border-color: color-mix(in oklch, var(--accent) 34%, var(--border));
  box-shadow: var(--premium-shadow);
}

.feature > :not(.visual-icon) {
  grid-column: 2;
  position: relative;
  z-index: 1;
}

.feature .visual-icon,
.stat .visual-icon {
  position: relative;
  z-index: 1;
  width: 56px;
  height: 56px;
  border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--border));
  background:
    linear-gradient(180deg, color-mix(in oklch, var(--gold) 14%, var(--surface)), color-mix(in oklch, var(--surface) 94%, white));
  box-shadow: inset 0 0 0 5px color-mix(in oklch, white 36%, transparent);
}

.stat .visual-icon {
  width: 44px;
  height: 44px;
}

.feature-index {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 8px;
  color: color-mix(in oklch, var(--accent) 82%, var(--fg));
}

.book-card {
  transition:
    transform var(--motion-base) var(--premium-ease),
    box-shadow var(--motion-base) var(--premium-ease);
}

.book-card:hover {
  transform: translateY(-4px);
}

.book-card:hover .book-cover {
  transform: rotate(-1deg) translateY(-2px);
  box-shadow: 0 24px 46px rgba(42, 25, 18, 0.18);
}

.book-cover {
  transform-origin: 50% 80%;
  border-radius: 2px 8px 8px 2px;
  isolation: isolate;
  box-shadow:
    0 22px 42px rgba(42, 25, 18, 0.14),
    inset 10px 0 16px rgba(0, 0, 0, 0.16);
  transition:
    transform var(--motion-base) var(--premium-ease),
    box-shadow var(--motion-base) var(--premium-ease);
}

.book-cover::before {
  inset: 6%;
  z-index: 1;
  border-color: color-mix(in oklch, var(--cover-fg, white) 44%, transparent);
  box-shadow:
    inset 0 0 0 1px color-mix(in oklch, black 10%, transparent),
    inset 0 -110px 120px rgba(0, 0, 0, 0.28);
}

.book-cover::after {
  z-index: 1;
  left: 9%;
  width: 10px;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.24), transparent 58%),
    color-mix(in oklch, var(--cover-fg, white) 22%, transparent);
  opacity: 0.72;
}

.book-cover .cover-meta::after {
  content: "";
  display: block;
  width: 48px;
  height: 1px;
  margin-top: 10px;
  background: currentColor;
  opacity: 0.58;
}

.cover-meta,
.cover-title {
  z-index: 2;
}

.cover-meta {
  padding: 6px 8px;
  border: 1px solid color-mix(in oklch, var(--cover-fg, white) 34%, transparent);
  background: color-mix(in oklch, black 22%, transparent);
  backdrop-filter: blur(4px);
}

.cover-title {
  text-wrap: balance;
}

.cover-title::before {
  content: "PROOF PRESS";
  display: block;
  margin-bottom: 12px;
  color: currentColor;
  font: 700 10px/1 var(--font-mono);
  letter-spacing: 0.18em;
  opacity: 0.76;
}

.mini-cover {
  border-radius: 1px 5px 5px 1px;
  box-shadow:
    0 12px 22px rgba(42, 25, 18, 0.13),
    inset 8px 0 12px rgba(0,0,0,0.16);
}

.timeline {
  gap: 16px;
}

.timeline-item {
  min-height: 104px;
  padding: 16px;
  border: 1px solid color-mix(in oklch, var(--border) 86%, white);
  background: color-mix(in oklch, var(--surface) 86%, transparent);
}

.timeline-item::before {
  border-color: color-mix(in oklch, var(--accent) 48%, var(--fg));
  background:
    linear-gradient(180deg, color-mix(in oklch, var(--gold) 18%, var(--surface)), var(--surface));
  color: var(--accent);
}

.menu-button {
  display: flex;
  align-items: center;
  gap: 10px;
  transition:
    transform var(--motion-fast) var(--premium-ease),
    background var(--motion-fast) linear,
    color var(--motion-fast) linear;
}

.menu-button:hover {
  transform: translateX(2px);
}

.button-icon {
  width: 18px;
  height: 18px;
}

.toolbar,
.filter-box,
.purchase-box,
.table-wrap {
  box-shadow: 0 14px 32px rgba(42, 25, 18, 0.08);
}

.toolbar,
.filter-box {
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--gold) 10%, transparent), transparent 38%),
    var(--surface);
}

.table-wrap {
  position: relative;
}

.table-wrap::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--gold), var(--accent-2));
}

th {
  background: color-mix(in oklch, var(--surface-2) 72%, white);
}

.progress {
  height: 9px;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 62%, transparent) 1px, transparent 1px) 0 0 / 18px 100%,
    var(--surface-2);
}

.progress span {
  background: linear-gradient(90deg, var(--accent), color-mix(in oklch, var(--gold) 64%, var(--accent)));
}

.program-card {
  background:
    linear-gradient(135deg, color-mix(in oklch, var(--surface) 92%, white), color-mix(in oklch, var(--surface-2) 74%, white));
  box-shadow: 0 12px 26px rgba(42, 25, 18, 0.07);
}

.program-icon svg {
  width: 31px;
  height: 31px;
  stroke: currentColor;
}

.visual-band {
  position: relative;
  overflow: hidden;
  border-block: 1px solid color-mix(in oklch, var(--fg) 12%, var(--border));
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--accent) 8%, transparent), transparent 48%),
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 84%, white), color-mix(in oklch, var(--surface-2) 72%, white));
}

.visual-band::before {
  content: "";
  position: absolute;
  inset: 24px;
  pointer-events: none;
  border: 1px solid color-mix(in oklch, var(--fg) 10%, transparent);
}

.proof-diagram,
.format-orbit,
.impact-ledger,
.shelf-board {
  position: relative;
  z-index: 1;
  border: 1px solid color-mix(in oklch, var(--fg) 16%, var(--border));
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--border) 46%, transparent) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 92%, white), color-mix(in oklch, var(--surface-2) 76%, white));
  box-shadow: 0 24px 60px rgba(42, 25, 18, 0.12);
}

.proof-diagram {
  padding: clamp(24px, 4vw, 42px);
}

.diagram-header {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(22px, 4vw, 52px);
  align-items: end;
  margin-bottom: clamp(22px, 4vw, 42px);
}

.diagram-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: color-mix(in oklch, var(--fg) 14%, var(--border));
  border: 1px solid color-mix(in oklch, var(--fg) 14%, var(--border));
}

.diagram-node {
  min-height: 210px;
  display: grid;
  align-content: space-between;
  gap: 18px;
  padding: 22px;
  background: color-mix(in oklch, var(--surface) 94%, white);
}

.proof-diagram:not(.is-visible) .diagram-node,
.format-orbit:not(.is-visible) .orbit-card,
.impact-ledger:not(.is-visible) .ledger-card,
.shelf-board:not(.is-visible) .shelf-card {
  opacity: 0;
  transform: translate3d(0, 16px, 0);
}

.proof-diagram.is-visible .diagram-node,
.format-orbit.is-visible .orbit-card,
.impact-ledger.is-visible .ledger-card,
.shelf-board.is-visible .shelf-card {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition:
    opacity 560ms var(--premium-ease),
    transform 560ms var(--premium-ease);
}

.diagram-node:nth-child(2),
.orbit-card:nth-of-type(3),
.ledger-card:nth-child(3),
.shelf-card:nth-child(2) {
  transition-delay: 70ms;
}

.diagram-node:nth-child(3),
.orbit-card:nth-of-type(4),
.ledger-card:nth-child(4),
.shelf-card:nth-child(3) {
  transition-delay: 140ms;
}

.diagram-node:nth-child(4),
.orbit-card:nth-of-type(5),
.ledger-card:nth-child(5) {
  transition-delay: 210ms;
}

.diagram-node .visual-icon,
.orbit-card .visual-icon,
.ledger-card .visual-icon,
.shelf-card .visual-icon {
  width: 48px;
  height: 48px;
  border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--border));
  background: color-mix(in oklch, var(--gold) 12%, var(--surface));
}

.diagram-node small,
.orbit-card small,
.ledger-card small,
.shelf-card small {
  color: var(--accent);
  font: 700 11px/1 var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.diagram-node h3,
.orbit-card h3,
.ledger-card h3,
.shelf-card h3 {
  margin-top: 8px;
  font-size: clamp(24px, 2.2vw, 34px);
}

.diagram-line {
  height: 8px;
  margin-top: 20px;
  background:
    linear-gradient(90deg, var(--accent) 0 26%, var(--gold) 26% 52%, var(--accent-2) 52% 76%, var(--fg) 76% 100%);
  transform-origin: left;
}

.proof-diagram:not(.is-visible) .diagram-line {
  transform: scaleX(0);
}

.proof-diagram.is-visible .diagram-line {
  transform: scaleX(1);
  transition: transform 760ms var(--premium-ease) 120ms;
}

.format-orbit {
  min-height: 540px;
  display: grid;
  place-items: center;
  padding: clamp(28px, 5vw, 60px);
  overflow: hidden;
}

.orbit-core {
  width: min(280px, 58vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 34px;
  border: 1px solid color-mix(in oklch, var(--accent) 36%, var(--border));
  border-radius: 50%;
  text-align: center;
  background:
    radial-gradient(circle, color-mix(in oklch, var(--gold) 18%, var(--surface)) 0 48%, transparent 49%),
    var(--surface);
  box-shadow: inset 0 0 0 18px color-mix(in oklch, var(--surface-2) 80%, transparent);
}

.orbit-card {
  position: absolute;
  width: min(260px, 36vw);
  min-height: 154px;
  padding: 18px;
  border: 1px solid color-mix(in oklch, var(--fg) 14%, var(--border));
  background: color-mix(in oklch, var(--surface) 94%, white);
  box-shadow: 0 18px 34px rgba(42, 25, 18, 0.1);
}

.orbit-card:nth-of-type(2) { top: 34px; left: clamp(24px, 7vw, 90px); }
.orbit-card:nth-of-type(3) { top: 58px; right: clamp(24px, 7vw, 90px); }
.orbit-card:nth-of-type(4) { right: clamp(28px, 10vw, 150px); bottom: 42px; }
.orbit-card:nth-of-type(5) { bottom: 56px; left: clamp(28px, 10vw, 150px); }

.impact-ledger {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1px;
  background: color-mix(in oklch, var(--fg) 14%, var(--border));
}

.ledger-card {
  min-height: 180px;
  padding: 24px;
  background: color-mix(in oklch, var(--surface) 94%, white);
}

.ledger-card.is-wide {
  grid-row: span 2;
  display: grid;
  align-content: space-between;
  background:
    linear-gradient(135deg, color-mix(in oklch, var(--accent) 14%, var(--surface)), color-mix(in oklch, var(--surface) 88%, white));
}

.ledger-total {
  font: 700 clamp(68px, 8vw, 118px)/0.9 var(--font-display);
  color: var(--accent);
}

.shelf-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: color-mix(in oklch, var(--fg) 14%, var(--border));
}

.shelf-card {
  min-height: 230px;
  display: grid;
  align-content: space-between;
  padding: 24px;
  background:
    linear-gradient(180deg, color-mix(in oklch, var(--surface) 96%, white), color-mix(in oklch, var(--surface-2) 72%, white));
}

.article-card {
  overflow: hidden;
  transition:
    transform var(--motion-base) var(--premium-ease),
    box-shadow var(--motion-base) var(--premium-ease);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--premium-shadow);
}

.article-image {
  position: relative;
  min-height: 230px;
  background:
    linear-gradient(90deg, color-mix(in oklch, var(--fg) 22%, transparent) 1px, transparent 1px) 0 0 / 32px 100%,
    linear-gradient(135deg, var(--article-bg, #2a1a15), color-mix(in oklch, var(--article-bg, #2a1a15) 70%, var(--gold)));
}

.article-image.is-photo,
.page-hero-media,
.editorial-figure {
  position: relative;
  overflow: hidden;
  border: 1px solid color-mix(in oklch, var(--fg) 18%, var(--border));
  background: var(--surface-2);
  box-shadow: 0 22px 54px rgba(42, 25, 18, 0.14);
}

.article-image.is-photo img,
.page-hero-media img,
.editorial-figure img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.04);
}

[data-reveal]:not(.is-visible) .article-image.is-photo img,
[data-reveal]:not(.is-visible) .page-hero-media img,
[data-reveal]:not(.is-visible) .editorial-figure img {
  transform: scale(1.045);
}

[data-reveal].is-visible .article-image.is-photo img,
[data-reveal].is-visible .page-hero-media img,
[data-reveal].is-visible .editorial-figure img {
  transform: scale(1);
  transition: transform 900ms var(--premium-ease);
}

.article-image.is-photo::before,
.page-hero-media::before,
.editorial-figure::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(255,255,255,0.42);
  pointer-events: none;
  z-index: 1;
}

.article-image.is-photo::after,
.page-hero-media::after,
.editorial-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px) 0 0 / 46px 100%,
    linear-gradient(180deg, rgba(12,10,8,0.02), rgba(12,10,8,0.22));
  pointer-events: none;
}

.page-hero-aside {
  display: grid;
  gap: 18px;
}

.page-hero-media {
  min-height: 260px;
  aspect-ratio: 16 / 9;
}

.editorial-figure {
  min-height: 340px;
  margin: 0;
}

.editorial-figure figcaption,
.page-hero-media figcaption {
  position: absolute;
  right: 18px;
  bottom: 16px;
  z-index: 2;
  max-width: 280px;
  padding: 10px 12px;
  color: #fff8ef;
  background: rgba(25, 20, 16, 0.62);
  border: 1px solid rgba(255,255,255,0.2);
  font: 700 10px/1.3 var(--font-mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.article-body {
  grid-template-columns: 42px minmax(0, 1fr);
}

.article-body .article-icon {
  grid-row: 1 / span 3;
  width: 38px;
  height: 38px;
  border: 1px solid color-mix(in oklch, var(--accent) 28%, var(--border));
  background: var(--surface-2);
}

.article-body > :not(.article-icon) {
  grid-column: 2;
}

.button::after,
.button-ghost::after,
.button-dark::after {
  content: "";
  width: 16px;
  height: 1px;
  margin-left: 6px;
  background: currentColor;
  transform-origin: left;
  transition: transform var(--motion-fast) var(--premium-ease);
}

.button:hover::after,
.button-ghost:hover::after,
.button-dark:hover::after {
  transform: scaleX(1.35);
}

.button.is-loading::after,
.button-ghost.is-loading::after,
.button-dark.is-loading::after,
.button:disabled::after,
.button-ghost:disabled::after,
.button-dark:disabled::after {
  transform: scaleX(0);
}

.nav-toggle {
  border-radius: 2px;
}

.mobile-action-bar {
  display: none;
}

.site-header.is-ready .brand-mark {
  animation: mastheadPress 700ms var(--premium-ease) both;
}

.site-header.is-ready .nav-links a {
  animation: navRise 520ms var(--premium-ease) both;
  animation-delay: calc(var(--nav-index, 0) * 45ms);
}

@keyframes mastheadPress {
  0% {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes navRise {
  0% {
    opacity: 0;
    transform: translateY(-8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1060px) {
  .site-header .brand {
    min-width: auto;
  }

  .mega-menu {
    grid-template-columns: 1fr 1fr;
  }

  .mega-proof {
    grid-column: 1 / -1;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 16px;
    align-items: center;
  }

  .diagram-header,
  .impact-ledger {
    grid-template-columns: 1fr;
  }

  .diagram-flow,
  .shelf-board {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .format-orbit {
    min-height: 0;
    place-items: stretch;
    gap: 14px;
  }

  .orbit-core {
    width: auto;
    aspect-ratio: auto;
    border-radius: 0;
  }

  .orbit-card {
    position: static;
    width: auto;
  }

  .page-hero::after {
    width: 280px;
    height: 170px;
  }
}

@media (max-width: 820px) {
  .nav-wrap {
    min-height: 74px;
  }

  .site-header .brand span:last-child::after {
    display: none;
  }

  .site-header .brand-mark {
    width: 48px;
    height: 48px;
    font-size: 20px;
  }

  .nav-links.is-open {
    top: 74px;
    padding: 24px;
    background:
      linear-gradient(90deg, color-mix(in oklch, var(--border) 24%, transparent) 1px, transparent 1px) 0 0 / 72px 72px,
      var(--bg);
  }

  .nav-links.is-open a {
    justify-content: flex-start;
    min-height: 58px;
    padding: 16px 0;
    background: transparent;
    transform: none;
  }

  body.has-mobile-action {
    padding-bottom: 92px;
  }

  .mobile-action-bar {
    position: fixed;
    right: 12px;
    bottom: max(12px, env(safe-area-inset-bottom));
    left: 12px;
    z-index: 70;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: center;
    padding: 12px;
    border: 1px solid color-mix(in oklch, var(--fg) 18%, var(--border));
    background:
      linear-gradient(90deg, color-mix(in oklch, var(--gold) 12%, transparent), transparent 56%),
      color-mix(in oklch, var(--surface) 92%, white);
    box-shadow: 0 18px 48px rgba(31, 22, 17, 0.2);
    backdrop-filter: blur(18px);
  }

  .mobile-action-bar strong,
  .mobile-action-bar span {
    display: block;
  }

  .mobile-action-bar strong {
    font: 700 13px/1.2 var(--font-mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .mobile-action-bar span {
    margin-top: 4px;
    color: var(--muted);
    font-size: 12px;
  }

  .mega-menu {
    position: fixed;
    top: 256px;
    right: 22px;
    bottom: 22px;
    left: 22px;
    width: auto;
    display: none;
    grid-template-columns: 1fr;
    overflow: auto;
    transform: translate3d(0, 0, 0);
  }

  body.nav-open .mega-menu {
    display: grid;
  }

  .mega-routes {
    grid-template-columns: 1fr;
  }

  .mega-proof {
    grid-template-columns: 1fr;
  }

  .diagram-flow,
  .shelf-board {
    grid-template-columns: 1fr;
  }

  .page-hero::after,
  .hero::before {
    opacity: 0.1;
  }
}

@media (max-width: 560px) {
  .mega-menu {
    top: 318px;
    right: 14px;
    bottom: 14px;
    left: 14px;
    padding: 12px;
  }

  .mega-feature {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .mega-cover {
    min-height: 126px;
  }

  .mega-card {
    min-height: 108px;
  }

  .mobile-action-bar {
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 8px;
    grid-template-columns: 1fr;
  }

  .proof-diagram,
  .format-orbit,
  .impact-ledger,
  .shelf-board {
    box-shadow: 0 14px 34px rgba(42, 25, 18, 0.1);
  }

  .visual-band::before {
    inset: 12px;
  }

  .feature,
  .stat,
  .article-body {
    grid-template-columns: 1fr;
  }

  .feature > :not(.visual-icon),
  .stat strong,
  .stat span,
  .article-body > :not(.article-icon) {
    grid-column: 1;
  }

  .feature .visual-icon,
  .stat .visual-icon,
  .article-body .article-icon {
    grid-row: auto;
  }

  .feature {
    min-height: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header.is-ready .brand-mark,
  .site-header.is-ready .nav-links a {
    animation: none !important;
  }

  .site-header,
  .feature,
  .book-card,
  .book-cover,
  .article-card,
  .menu-button,
  .mega-menu,
  .mega-cover,
  .mega-card,
  .orbit-card,
  .diagram-node,
  .ledger-card,
  .shelf-card,
  .diagram-line,
  .mega-meter span,
  .article-image.is-photo img,
  .page-hero-media img,
  .editorial-figure img {
    transition: none !important;
  }

  .proof-diagram:not(.is-visible) .diagram-node,
  .format-orbit:not(.is-visible) .orbit-card,
  .impact-ledger:not(.is-visible) .ledger-card,
  .shelf-board:not(.is-visible) .shelf-card,
  .proof-diagram:not(.is-visible) .diagram-line {
    opacity: 1 !important;
    transform: none !important;
  }
}