:root {
  --deep-blue: #0A1F44;
  --bright-orange: #FF6B00;
  --fluorescent-green: #39FF14;
  --warm-paper: #F5E9D6;
  --deep-ink: #2B2B2B;
  --light-gray: #F2F4F8;
  --medium-blue: #1D4E89;
  --dark-orange: #D94F00;
  --dark-green: #1E9E14;
  --rail-width: 17rem;
  --topbar-h: 4rem;
  --content-max: 80rem;
  --font-display: "Oswald", "Impact", "Arial Narrow", "Noto Sans SC", sans-serif;
  --font-body: "Roboto", "Segoe UI", "Noto Sans SC", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", Consolas, "Noto Sans SC", monospace;
}

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

html {
  min-height: 100%;
  background: var(--deep-blue);
  scrollbar-color: var(--bright-orange) var(--deep-blue);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--deep-blue);
  color: var(--deep-ink);
  font-family: var(--font-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

h1, h2, h3, h4 {
  margin-top: 0;
  font-family: var(--font-display);
  line-height: 1.15;
  color: inherit;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.015em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
}

h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

p {
  margin: 0 0 1rem;
}

ul,
ol {
  margin: 0 0 1rem;
}

a {
  color: var(--medium-blue);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--bright-orange);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

::selection {
  background: var(--bright-orange);
  color: var(--deep-blue);
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--fluorescent-green);
  outline-offset: 2px;
}

.site-skip {
  position: fixed;
  top: -3rem;
  left: 0.75rem;
  z-index: 300;
  padding: 0.7rem 1.1rem;
  background: var(--bright-orange);
  color: var(--deep-blue);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  box-shadow: 0 0 0 4px rgba(10, 31, 68, 0.2);
}

.site-skip:focus {
  top: 0.75rem;
}

.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-width);
  background: var(--deep-blue);
  color: var(--warm-paper);
  z-index: 120;
  overflow: hidden;
  border-right: 1px solid rgba(255, 107, 0, 0.22);
}

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(57, 255, 20, 0.18);
  transform-origin: 0 50%;
  transform: scaleX(0);
  z-index: 2;
}

.rail-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 2rem 1.25rem 1.5rem;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  color: inherit;
  text-decoration: none;
}

.brand:hover {
  color: inherit;
}

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: none;
  width: 3.25rem;
  height: 3.25rem;
  background: var(--deep-blue);
  color: var(--bright-orange);
  border: 1px solid rgba(255, 107, 0, 0.65);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  clip-path: polygon(0 0, calc(100% - 0.6rem) 0, 100% 0.6rem, 100% 100%, 0.6rem 100%, 0 calc(100% - 0.6rem));
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0.45rem;
  border-right: 3px solid var(--bright-orange);
  transform: skewX(-16deg);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-tagline {
  margin-top: 0.25rem;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: rgba(245, 233, 214, 0.72);
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  background: transparent;
  border: 1px solid rgba(255, 107, 0, 0.65);
  color: var(--warm-paper);
  padding: 0.45rem 0.75rem;
  font-family: var(--font-display);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--fluorescent-green);
  color: var(--fluorescent-green);
}

.nav-toggle.is-active {
  border-color: var(--fluorescent-green);
  color: var(--fluorescent-green);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  width: 1.1rem;
  gap: 0.28rem;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(0.375rem) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-0.375rem) rotate(-45deg);
}

.nav-toggle-text {
  font-weight: 700;
}

.site-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--fluorescent-green) transparent;
}

.site-nav::-webkit-scrollbar {
  width: 4px;
}

.site-nav::-webkit-scrollbar-track {
  background: transparent;
}

.site-nav::-webkit-scrollbar-thumb {
  background: var(--fluorescent-green);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
  border-left: 1px solid rgba(245, 233, 214, 0.14);
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-left: -1px;
  padding: 0.7rem 0.8rem;
  color: rgba(245, 233, 214, 0.8);
  border-left: 3px solid transparent;
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.nav-link:hover {
  color: #fff;
  background: linear-gradient(90deg, rgba(255, 107, 0, 0.16), rgba(255, 107, 0, 0));
  border-left-color: var(--bright-orange);
}

.nav-link[aria-current="page"] {
  color: #fff;
  background: linear-gradient(90deg, rgba(255, 107, 0, 0.2), rgba(255, 107, 0, 0));
  border-left-color: var(--bright-orange);
}

.nav-link[aria-current="page"]::after {
  content: "●";
  margin-left: auto;
  font-size: 0.5rem;
  color: var(--fluorescent-green);
}

.nav-index {
  min-width: 1.5rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  color: var(--fluorescent-green);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--bright-orange);
}

.nav-label {
  display: block;
}

.header-actions {
  display: grid;
  gap: 0.6rem;
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(245, 233, 214, 0.12);
}

.quick-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.65rem 0.8rem;
  border: 1px solid rgba(255, 107, 0, 0.45);
  background: rgba(255, 107, 0, 0.08);
  color: var(--warm-paper);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.quick-link:hover {
  background: var(--bright-orange);
  border-color: var(--bright-orange);
  color: var(--deep-blue);
}

.quick-link-text {
  display: block;
}

.quick-link-arrow {
  font-family: var(--font-data);
  font-size: 1rem;
  color: var(--fluorescent-green);
}

.quick-link:hover .quick-link-arrow {
  color: var(--deep-blue);
}

.site-main {
  margin-left: var(--rail-width);
  min-height: 72vh;
  background: var(--light-gray);
}

.content-container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(1.5rem, 4vw, 3.5rem);
}

.content-container--narrow {
  max-width: 60rem;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(1rem, 2vw, 1.5rem);
  margin: 2rem 0;
}

.content-grid > * {
  min-width: 0;
}

.grid-span-3 {
  grid-column: span 3;
}

.grid-span-4 {
  grid-column: span 4;
}

.grid-span-6 {
  grid-column: span 6;
}

.grid-span-8 {
  grid-column: span 8;
}

.grid-span-12 {
  grid-column: span 12;
}

.section-chapter {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 1rem;
  margin: 0 0 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--deep-blue);
}

.chapter-number {
  font-family: var(--font-data);
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1;
  color: var(--bright-orange);
  letter-spacing: -0.04em;
}

.chapter-title {
  margin: 0;
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chapter-desc {
  flex: 0 0 100%;
  margin: 0.25rem 0 0;
  max-width: 70ch;
  color: rgba(43, 43, 43, 0.75);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.6rem;
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: rgba(10, 31, 68, 0.6);
}

.breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.6rem;
  color: var(--bright-orange);
}

.breadcrumbs a {
  color: var(--medium-blue);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--bright-orange);
}

.breadcrumbs [aria-current="page"] {
  color: var(--deep-blue);
  font-weight: 700;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--deep-blue);
  background: transparent;
  color: var(--deep-blue);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
}

.button:hover {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--warm-paper);
}

.button--primary {
  background: var(--bright-orange);
  border-color: var(--bright-orange);
  color: var(--deep-blue);
}

.button--primary:hover {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--warm-paper);
}

.button--ghost {
  background: rgba(242, 244, 248, 0.6);
  border-color: rgba(10, 31, 68, 0.35);
}

.button--ghost:hover {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--warm-paper);
}

.button--data {
  font-family: var(--font-data);
  background: var(--fluorescent-green);
  border-color: var(--deep-blue);
  color: var(--deep-blue);
}

.button--data:hover {
  background: var(--dark-green);
  border-color: var(--dark-green);
  color: #fff;
}

.data-card {
  padding: 1.25rem;
  background: var(--warm-paper);
  border: 1px solid rgba(10, 31, 68, 0.14);
  border-left: 4px solid var(--bright-orange);
  box-shadow: 0 1px 0 rgba(10, 31, 68, 0.05);
}

.data-card--signal {
  border-left-color: var(--fluorescent-green);
}

.data-card__value {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.05;
  color: var(--deep-blue);
}

.data-card__label {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(43, 43, 43, 0.65);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 1rem 0;
  padding: 0;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--medium-blue);
  background: rgba(29, 78, 137, 0.08);
  color: var(--deep-blue);
  font-family: var(--font-data);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.tag-chip:hover {
  border-color: var(--bright-orange);
  background: rgba(255, 107, 0, 0.08);
  color: var(--deep-blue);
}

.tag-chip--active {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--fluorescent-green);
}

.table-wrap {
  margin: 1.5rem 0;
  overflow-x: auto;
  background: var(--light-gray);
  border: 1px solid rgba(10, 31, 68, 0.14);
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--light-gray);
}

.table th {
  padding: 0.8rem;
  background: var(--deep-blue);
  color: var(--warm-paper);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-align: left;
  text-transform: uppercase;
}

.table td {
  padding: 0.7rem 0.8rem;
  border-top: 1px solid rgba(10, 31, 68, 0.1);
  font-size: 0.9rem;
}

.table td:first-child {
  font-family: var(--font-data);
  color: var(--bright-orange);
}

.table tr:hover td {
  background: rgba(255, 107, 0, 0.06);
}

.media-frame {
  position: relative;
  display: block;
  isolation: isolate;
  min-height: 180px;
  overflow: hidden;
  background: var(--deep-blue);
  border: 1px solid rgba(10, 31, 68, 0.16);
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    repeating-linear-gradient(-45deg, rgba(255, 107, 0, 0.08) 0 1px, transparent 1px 12px),
    linear-gradient(135deg, rgba(57, 255, 20, 0.12), transparent 55%);
}

.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 0.35rem;
  z-index: 0;
  background: linear-gradient(90deg, var(--bright-orange), var(--fluorescent-green));
}

.media-frame > img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--16x9 {
  aspect-ratio: 16 / 9;
}

.media-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.media-frame--wide {
  aspect-ratio: 21 / 9;
  min-height: 220px;
}

.media-frame--portrait {
  aspect-ratio: 3 / 4;
  min-height: 320px;
}

.panel {
  padding: 1.5rem;
  background: var(--warm-paper);
  border: 1px solid rgba(10, 31, 68, 0.14);
}

.panel--dark {
  background: var(--deep-blue);
  border-color: var(--deep-blue);
  color: var(--warm-paper);
}

.panel--slant {
  clip-path: polygon(0 0, calc(100% - 1rem) 0, 100% 1rem, 100% 100%, 1rem 100%, 0 calc(100% - 1rem));
}

.index-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
  list-style: none;
  margin: 1.5rem 0;
  padding: 0;
}

.index-map__link {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  min-height: 4.2rem;
  padding: 1rem;
  background: var(--light-gray);
  border: 1px solid rgba(10, 31, 68, 0.12);
  border-bottom: 3px solid var(--medium-blue);
  color: var(--deep-blue);
  text-decoration: none;
}

.index-map__link:hover {
  background: var(--warm-paper);
  border-bottom-color: var(--bright-orange);
  box-shadow: 0 0.5rem 1rem rgba(10, 31, 68, 0.08);
  transform: translateY(-2px);
  color: var(--deep-blue);
}

.index-map__num {
  font-family: var(--font-data);
  font-size: 0.8rem;
  color: var(--bright-orange);
}

.index-map__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.slant-line {
  height: 2px;
  margin: 2rem 0;
  border: 0;
  background: linear-gradient(100deg, var(--bright-orange) 0%, var(--deep-blue) 85%, var(--fluorescent-green) 100%);
}

.site-footer {
  margin-left: var(--rail-width);
  padding: 3rem clamp(1.25rem, 4vw, 3.5rem) 1.5rem;
  background: var(--deep-blue);
  color: var(--warm-paper);
  border-top: 4px solid var(--bright-orange);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 2rem;
  max-width: var(--content-max);
  margin-inline: auto;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-statement {
  max-width: 52ch;
  margin: 1.1rem 0 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(245, 233, 214, 0.72);
}

.footer-nav,
.footer-meta,
.footer-contact {
  min-width: 0;
}

.footer-heading {
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 107, 0, 0.35);
  color: var(--fluorescent-green);
  font-family: var(--font-data);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.footer-link {
  display: inline-block;
  padding-left: 0.65rem;
  border-left: 2px solid transparent;
  color: rgba(245, 233, 214, 0.8);
  text-decoration: none;
  font-size: 0.92rem;
}

.footer-link:hover {
  padding-left: 0.9rem;
  border-left-color: var(--bright-orange);
  color: #fff;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  font-size: 0.9rem;
}

.contact-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.contact-label {
  flex: 0 0 auto;
  min-width: 2.5rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(245, 233, 214, 0.55);
}

.contact-text {
  overflow-wrap: anywhere;
  color: rgba(245, 233, 214, 0.9);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-max);
  margin: 2.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(245, 233, 214, 0.12);
  color: rgba(245, 233, 214, 0.58);
  font-size: 0.85rem;
}

.footer-copy {
  margin: 0;
}

.footer-icp {
  margin: 0;
  font-family: var(--font-data);
}

.footer-address {
  margin: 0;
  max-width: 46ch;
  text-align: right;
}

@media (max-width: 1100px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  :root {
    --rail-width: 0px;
  }

  body {
    background: var(--deep-blue);
  }

  .site-header {
    inset: 0 0 auto 0;
    width: auto;
    height: var(--topbar-h);
    overflow: visible;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 107, 0, 0.35);
  }

  .rail-inner {
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    padding: 0.5rem 1rem;
  }

  .brand {
    flex: 1;
  }

  .brand-mark {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.05rem;
  }

  .brand-name {
    font-size: 1.3rem;
  }

  .brand-tagline {
    font-size: 0.6rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(86vw, 22rem);
    height: 100dvh;
    flex: none;
    padding: calc(var(--topbar-h) + 1.25rem) 1.25rem 1.5rem;
    background: var(--deep-blue);
    border-left: 4px solid var(--bright-orange);
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.3);
    transform: translateX(105%);
    visibility: hidden;
    overflow-y: auto;
    transition: transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
  }

  .site-nav[data-open="false"] {
    transform: translateX(105%);
    visibility: hidden;
  }

  .nav-list {
    border-left: 0;
    gap: 0.1rem;
  }

  .header-actions {
    margin-top: 2rem;
  }

  .site-main {
    margin-left: 0;
  }

  .site-footer {
    margin-left: 0;
  }

  .content-grid {
    row-gap: 1rem;
  }

  .grid-span-3,
  .grid-span-4 {
    grid-column: span 6;
  }

  .grid-span-6,
  .grid-span-8 {
    grid-column: span 12;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }

  .footer-address {
    text-align: left;
  }

  .content-grid {
    display: block;
  }

  .content-grid > * {
    margin-bottom: 1rem;
  }

  .grid-span-3,
  .grid-span-4,
  .grid-span-6,
  .grid-span-8,
  .grid-span-12 {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .site-nav {
    transition: none;
  }

  .index-map__link {
    transform: none !important;
  }

  .nav-toggle-line {
    transform: none !important;
  }
}