:root {
  --ink-green: #0D1A15;
  --charcoal: #15181A;
  --paper: #F3EFE6;
  --paper-bright: #FBFAF6;
  --neon: #35E0A1;
  --deep-teal: #0F3A2E;
  --gold: #E28A2B;
  --hairline: #2B3630;
  --index-grey: #8C948C;
  --correct-red: #C0453C;
  --body-light: #E7E3D8;

  --font-display: "Barlow Condensed", "Oswald", "Arial Narrow", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-data: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --step-12: 12px;
  --step-14: 14px;
  --step-17: 17px;
  --step-24: 24px;
  --step-40: 40px;
  --step-72: 72px;
  --step-120: 120px;

  --shell: 1440px;
  --gutter: 24px;
  --rail: 32%;
  --slant: 8deg;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --header-h: 78px;
  --header-h-solid: 62px;
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink-green);
  color: var(--body-light);
  font-family: var(--font-body);
  font-size: var(--step-17);
  line-height: 1.85;
  letter-spacing: .01em;
}

img, svg, video { max-width: 100%; height: auto; display: block; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--neon); }

h1, h2, h3, h4 {
  margin: 0 0 .5em;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-transform: none;
}

h1 { font-size: clamp(40px, 7vw, var(--step-120)); }
h2 { font-size: clamp(28px, 4vw, var(--step-72)); }
h3 { font-size: clamp(20px, 2.4vw, var(--step-40)); }

p { margin: 0 0 1.2em; }

:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

/* ---------- shell & layout ---------- */
.site-shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}
.col-8 { grid-column: span 8; }
.col-6 { grid-column: span 6; }
.col-4 { grid-column: span 4; }
.col-3 { grid-column: span 3; }

.rail {
  position: sticky;
  top: calc(var(--header-h-solid) + 24px);
  align-self: start;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: 0;
  left: -9999px;
  z-index: 999;
  padding: 12px 20px;
  background: var(--neon);
  color: var(--ink-green);
  font-size: var(--step-14);
  font-weight: 700;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* ---------- index / type helpers ---------- */
.index-label {
  display: inline-block;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--index-grey);
}

.mono-display {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(72px, 12vw, var(--step-120));
  letter-spacing: -0.03em;
  line-height: .92;
  color: var(--gold);
  display: block;
}

.prose {
  max-width: 34em;
  font-size: var(--step-17);
  line-height: 1.85;
  color: var(--body-light);
}
.prose a { color: var(--neon); border-bottom: 1px solid var(--hairline); }
.prose a:hover { border-bottom-color: var(--neon); }

.editorial {
  background: var(--paper);
  color: #1A1D18;
  padding: clamp(48px, 8vw, 128px) 0;
}
.editorial .prose { color: #23271F; }
.editorial .index-label { color: #6E736A; }
.editorial h2, .editorial h3 { color: #12160F; }

/* ---------- breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .12em;
  color: var(--index-grey);
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumb li::after {
  content: "/";
  margin-left: 8px;
  color: var(--hairline);
}
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--index-grey); }
.breadcrumb a:hover { color: var(--neon); }
.breadcrumb [aria-current="page"] { color: var(--body-light); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--body-light);
  font-family: var(--font-body);
  font-size: var(--step-14);
  letter-spacing: .06em;
  cursor: pointer;
  transition: background-color .28s var(--ease), color .28s var(--ease), border-color .28s var(--ease);
}
.btn:hover { color: var(--ink-green); background: var(--body-light); border-color: var(--body-light); }
.btn-primary { border-color: var(--neon); color: var(--neon); }
.btn-primary:hover { background: var(--neon); color: var(--ink-green); border-color: var(--neon); }
.btn-ghost { border-color: var(--hairline); color: var(--index-grey); }
.btn-ghost:hover { color: var(--body-light); background: rgba(243,239,230,.08); border-color: var(--body-light); }
.btn-gold { border-color: var(--gold); color: var(--gold); }
.btn-gold:hover { background: var(--gold); color: var(--ink-green); border-color: var(--gold); }

/* ---------- chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--hairline);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .1em;
  color: var(--index-grey);
}
.chip-current { border-color: var(--neon); color: var(--neon); }
.chip-gold { border-color: var(--gold); color: var(--gold); }
.chip-warn { border-color: var(--correct-red); color: var(--correct-red); }

/* ---------- header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 500;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .4s var(--ease), border-color .4s var(--ease);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: var(--header-h);
  padding-block: 14px;
  transition: min-height .35s var(--ease), padding .35s var(--ease);
}

.brand-lockup { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark {
  width: 26px;
  height: 26px;
  display: inline-block;
  background: var(--neon);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .02em;
  color: var(--paper-bright);
}
.brand-sub {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  color: var(--index-grey);
  text-transform: uppercase;
}
.site-header[data-state="solid"] .brand-sub { color: var(--neon); }

.site-nav { margin-left: auto; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: var(--step-14);
  letter-spacing: .05em;
  color: var(--body-light);
  border-bottom: 2px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.nav-link:hover { color: var(--neon); }
.nav-link[aria-current="page"] {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.nav-foot { display: none; }

.header-tools {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 0 0 auto;
}
.tool-link {
  font-size: var(--step-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--index-grey);
}
.tool-link:hover { color: var(--neon); }
.header-cta {
  padding: 10px 18px;
  border: 1px solid var(--neon);
  color: var(--neon);
  font-size: var(--step-14);
  letter-spacing: .06em;
  transition: background-color .28s var(--ease), color .28s var(--ease);
}
.header-cta:hover { background: var(--neon); color: var(--ink-green); }

.site-header[data-state="solid"] {
  background: rgba(13, 26, 21, .96);
  border-bottom-color: var(--hairline);
  backdrop-filter: blur(6px);
}
.site-header[data-state="solid"] .header-inner {
  min-height: var(--header-h-solid);
  padding-block: 8px;
}

/* mobile nav toggle */
.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--hairline);
  color: var(--body-light);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
}
.nav-toggle-text { margin-left: 4px; }
.nav-toggle-bar + .nav-toggle-bar { margin-top: 0; }
.nav-toggle [aria-hidden="true"] { display: none; }

@media (max-width: 1080px) {
  .header-tools .tool-link { display: none; }
}

@media (max-width: 900px) {
  .site-header { background: rgba(13, 26, 21, .96); border-bottom-color: var(--hairline); }
  .nav-toggle { display: inline-flex; flex-direction: column; align-items: center; }
  .nav-toggle [aria-hidden="true"] { display: block; margin: 2px 0; }
  .nav-toggle-text { display: none; }
  .header-tools { display: none; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin: 0;
    background: var(--ink-green);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
    display: none;
    padding: 8px var(--gutter) 28px;
  }
  .site-header[data-open] .site-nav { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-list li { border-bottom: 1px solid var(--hairline); }
  .nav-link { display: block; padding: 16px 0; font-size: var(--step-17); border-bottom: none; }
  .nav-link[aria-current="page"] { border-bottom: none; color: var(--neon); }
  .nav-link[aria-current="page"]::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 10px;
    background: var(--neon);
    clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
  }
  .nav-foot { display: block; padding-top: 22px; }
  .nav-foot-cta { width: 100%; justify-content: center; margin-top: 16px; }
}

/* ---------- panels ---------- */
.panel {
  background: var(--deep-teal);
  border: 1px solid var(--hairline);
  padding: 20px 22px;
  box-shadow: 0 1px 0 rgba(0,0,0,.4);
}
.panel--compact { padding: 14px 16px; }
.panel--footer { background: var(--charcoal); }
.panel-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 9px 0;
  border-bottom: 1px solid var(--hairline);
}
.panel-row:last-child { border-bottom: none; }
.panel-label {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--index-grey);
  min-width: 84px;
}
.panel-value {
  font-family: var(--font-data);
  font-size: var(--step-14);
  color: var(--body-light);
  word-break: break-word;
}

/* ---------- data band ---------- */
.data-band {
  position: relative;
  background: var(--charcoal);
  border-block: 1px solid var(--hairline);
  padding: clamp(48px, 6vw, 96px) 0;
  overflow: hidden;
}
.band-clip {
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}
.data-band-inner {
  display: grid;
  grid-template-columns: 3fr 6fr 3fr;
  gap: var(--gutter);
  align-items: end;
}
@media (max-width: 900px) {
  .band-clip { clip-path: polygon(0 0, 100% 2%, 100% 100%, 0 98%); }
  .data-band-inner { grid-template-columns: 1fr; gap: 32px; }
}

/* ---------- timeline ---------- */
.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 28px;
  list-style: none;
  border-left: 1px solid var(--hairline);
}
.timeline-item {
  position: relative;
  padding: 0 0 40px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 10px;
  width: 9px;
  height: 9px;
  background: var(--ink-green);
  border: 1px solid var(--gold);
}
.timeline-item + .timeline-item::before { background: var(--ink-green); }

/* ---------- media frames ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--deep-teal);
  border: 1px solid var(--hairline);
  aspect-ratio: 16 / 9;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(15, 58, 46, .28);
  box-shadow: inset 0 0 0 1px rgba(43, 54, 48, .6);
  pointer-events: none;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.7) contrast(1.04) brightness(.94);
}
.media-frame figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  padding: 12px 16px;
  background: rgba(13, 26, 21, .82);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .1em;
  color: var(--body-light);
}

/* ---------- tables ---------- */
.table-shell {
  background: var(--charcoal);
  border: 1px solid var(--hairline);
  overflow-x: auto;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step-14);
}
.data-table caption {
  text-align: left;
  padding: 14px 16px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  color: var(--index-grey);
  text-transform: uppercase;
}
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
}
.data-table thead th {
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--index-grey);
  background: #111514;
}
.data-table tbody tr:nth-child(odd) { background: rgba(251, 250, 246, .03); }
.data-table tbody tr:hover { background: rgba(53, 224, 161, .07); }

/* ---------- reveal & motion ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}
.reveal[data-revealed] { opacity: 1; transform: none; }

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 22px;
  z-index: 400;
  padding: 11px 20px;
  background: var(--deep-teal);
  border: 1px solid var(--neon);
  color: var(--neon);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  cursor: pointer;
  opacity: 0;
  transition: opacity .35s var(--ease), background-color .28s var(--ease), color .28s var(--ease);
}
.back-to-top[data-visible] { opacity: 1; }
.back-to-top:hover { background: var(--neon); color: var(--ink-green); }
.back-to-top[hidden] { display: block; }

/* ---------- footer ---------- */
.site-footer {
  background: var(--charcoal);
  border-top: 1px solid var(--hairline);
  padding-top: 0;
  color: var(--body-light);
}
.footnote-band {
  background: var(--ink-green);
  border-bottom: 1px solid var(--hairline);
  padding: 28px 0;
}
.footnote-inner { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: baseline; }
.footnote-text {
  margin: 0;
  max-width: 62ch;
  font-size: var(--step-14);
  color: var(--index-grey);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px var(--gutter);
  padding-block: clamp(48px, 6vw, 88px);
}
.footer-brand { display: flex; flex-direction: column; gap: 10px; }
.footer-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--step-24);
  color: var(--paper-bright);
  letter-spacing: .01em;
}
.footer-tag {
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .14em;
  color: var(--neon);
  text-transform: uppercase;
}
.footer-signoff {
  margin: 6px 0 0;
  font-size: var(--step-12);
  color: var(--index-grey);
  letter-spacing: .06em;
}
.footer-title {
  margin: 0 0 16px;
  font-family: var(--font-data);
  font-size: var(--step-12);
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--index-grey);
}
.footer-links { margin: 0; padding: 0; list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: var(--step-14);
  color: var(--body-light);
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.footer-links a:hover { color: var(--neon); border-bottom-color: var(--neon); }

.footer-contact { padding-bottom: 32px; }
.footer-service {
  margin: 16px 0 0;
  max-width: 70ch;
  font-size: var(--step-14);
  color: var(--index-grey);
}
.footer-base {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  justify-content: space-between;
  align-items: center;
  padding-block: 22px 28px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-data);
  font-size: var(--step-12);
  letter-spacing: .1em;
  color: var(--index-grey);
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px var(--gutter); }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
  :root { --gutter: 18px; --slant: 4deg; }
  .footer-grid { grid-template-columns: 1fr; }
  .back-to-top { right: 12px; bottom: 14px; }
}

@media (max-width: 640px) {
  .grid-12 { grid-template-columns: 1fr; }
  .col-8, .col-6, .col-4, .col-3 { grid-column: 1 / -1; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 0; transform: none; transition: opacity .3s linear; }
  .back-to-top { transition: opacity .3s linear; }
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}