/* Reset & Tokens */
html { scroll-behavior: smooth; }
html, body, main, header, footer, nav, section, article, aside, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }
*, *::before, *::after { box-sizing: border-box; }

:root {
  color-scheme: dark;
  --bg: #0A1128;
  --bg-deep: #050A18;
  --panel: #12204A;
  --ink: #E6E9F0;
  --muted: #8A93A8;
  --line: #2A3D6B;
  --neon: #B537F2;
  --lime: #39FF14;
  --cyan: #00E5FF;
  --warn: #FFB300;
  --header-h: 72px;
  --maxw: 1440px;
  --font-display: "Orbitron", "Rajdhani", "Bank Gothic", "Arial Narrow", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(181,55,242,.15), transparent 28%),
    radial-gradient(circle at 84% 88%, rgba(0,229,255,.10), transparent 34%),
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--neon); color: #fff; }

#main-content { display: block; min-height: 40vh; scroll-margin-top: calc(var(--header-h) + 10px); }

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; }
li { line-height: 1.5; }
img { max-width: 100%; height: auto; }

a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease, padding-left .2s ease;
}
a:hover { color: var(--lime); }
a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(57,255,20,.18);
  border-radius: 2px;
}

button { font: inherit; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  font-weight: 700;
  color: var(--ink);
}
h1 { font-size: clamp(34px, 5vw, 48px); }
h2 { font-size: clamp(26px, 4vw, 36px); }
h3 { font-size: 24px; }

.small { font-size: 14px; color: var(--muted); }
.muted { color: var(--muted); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
  transition: background .2s ease, border-color .2s ease, color .2s ease, box-shadow .2s ease;
}
.btn:hover {
  background: var(--neon);
  border-color: var(--neon);
  color: #fff;
  box-shadow: 0 0 22px rgba(181,55,242,.32);
}
.btn-primary {
  background: var(--lime);
  border-color: var(--lime);
  color: #06120A;
  font-weight: 700;
  box-shadow: 0 0 18px rgba(57,255,20,.24);
}
.btn-primary:hover {
  background: #22DD00;
  border-color: #22DD00;
  color: #02060A;
  box-shadow: 0 0 28px rgba(57,255,20,.42);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(181,55,242,.5);
  color: var(--neon);
}
.btn-ghost:hover {
  background: rgba(181,55,242,.12);
  color: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 20px rgba(181,55,242,.22);
}

/* Layout & Containers */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 32px;
}

.section { padding-block: 56px; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-kicker {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--neon);
  margin-bottom: 8px;
  text-transform: uppercase;
}

.section-title { font-size: clamp(24px, 3vw, 36px); margin: 0; line-height: 1.2; }
.section-title[data-accent] { color: var(--lime); }
.section-link { color: var(--cyan); font-size: 14px; text-decoration: none; }
.section-link:hover { color: var(--lime); }

/* Page Hero */
.page-hero {
  position: relative;
  padding: 64px 0 32px;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(420px, 44vw);
  height: 140px;
  background: linear-gradient(135deg, rgba(181,55,242,.30), rgba(0,229,255,.06));
  clip-path: polygon(12% 0, 100% 0, 100% 100%);
  pointer-events: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--neon), var(--cyan), transparent);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-title { margin: 0 0 12px; letter-spacing: .02em; }
.lead { font-size: 18px; color: var(--muted); max-width: 70ch; }

/* Breadcrumb */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin-bottom: 20px;
  padding: 0;
  font-size: 13px;
}
.breadcrumb li { display: flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line); }
.breadcrumb a { color: var(--muted); text-decoration: none; font-family: var(--font-display); letter-spacing: .04em; }
.breadcrumb a:hover { color: var(--lime); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

/* Split layout */
.split {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.4fr);
  gap: 28px;
  align-items: start;
}
.split-left, .split-right { display: grid; gap: 18px; min-width: 0; }

/* Panel / Card */
.panel {
  background: linear-gradient(145deg, rgba(18,32,74,.74), rgba(10,17,40,.78));
  border: 1px solid var(--line);
  border-right: 3px solid var(--cyan);
  padding: 24px;
  position: relative;
}
.panel::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 10px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  opacity: .35;
  pointer-events: none;
}

.card {
  background: linear-gradient(145deg, rgba(18,32,74,.9), rgba(10,17,40,.85));
  border: 1px solid var(--line);
  border-left: 4px solid var(--neon);
  padding: 20px;
  position: relative;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--lime);
  box-shadow: 0 12px 30px rgba(0,0,0,.35), 0 0 24px rgba(57,255,20,.12);
}
.card-title { font-family: var(--font-display); font-size: 18px; margin: 0 0 8px; }
.card-meta { color: var(--cyan); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; margin-bottom: 8px; }
.card-text { color: var(--muted); font-size: 14px; }

/* Index list */
.index-list { display: grid; gap: 12px; }
.index-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(18,32,74,.55);
  border: 1px solid var(--line);
  border-left: 3px solid var(--neon);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease, color .2s ease;
}
.index-item:hover {
  border-color: var(--lime);
  border-left-color: var(--lime);
  color: var(--ink);
  transform: translateX(4px);
  box-shadow: 0 0 24px rgba(57,255,20,.08);
}
.index-item-title { font-family: var(--font-display); font-size: 15px; }
.index-item-meta { color: var(--cyan); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; white-space: nowrap; }

/* Media frame */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  overflow: hidden;
  background: linear-gradient(135deg, #14204D, #0A1128);
  border: 1px solid var(--line);
  border-bottom: 2px solid var(--neon);
}
.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(1.15) contrast(1.05);
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(115deg, rgba(181,55,242,.22), transparent 55%, rgba(0,229,255,.18));
  mix-blend-mode: screen;
  pointer-events: none;
}
.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 18%;
  background: linear-gradient(transparent, rgba(10,17,40,.8));
  z-index: 2;
  pointer-events: none;
}
.media-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 3;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* Tags & Status */
.tag {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 4px 10px;
  font-size: 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-display);
  letter-spacing: .06em;
}
.tag-neon { color: var(--neon); border-color: rgba(181,55,242,.5); background: rgba(181,55,242,.08); }
.tag-lime { color: var(--lime); border-color: rgba(57,255,20,.4); background: rgba(57,255,20,.06); }
.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}
.status::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 12px var(--lime);
}

/* Prose */
.prose { max-width: 72ch; }
.prose p { margin: 1em 0; }
.prose h2 { font-size: 24px; margin: 2em 0 .6em; }
.prose h3 { font-size: 18px; margin: 1.6em 0 .4em; }
.prose ul { padding-left: 1.2em; margin: 1em 0; list-style: square; }
.prose li { margin: .4em 0; }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10,17,40,.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--neon), transparent 60%, var(--lime));
  opacity: .55;
  pointer-events: none;
}

.header-shell {
  position: relative;
  z-index: 2;
  max-width: var(--maxw);
  margin-inline: auto;
  height: var(--header-h);
  padding-inline: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -44px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--lime);
  color: #02060A;
  font-weight: 700;
  text-decoration: none;
  transition: top .2s ease;
}
.skip-link:focus { top: 10px; }

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 8;
  background: linear-gradient(90deg, var(--neon), var(--lime));
  transform: scaleX(0);
  transform-origin: 0 0;
  pointer-events: none;
  will-change: transform;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { color: var(--ink); }

.brand-mark {
  --mark-size: 44px;
  width: var(--mark-size);
  height: var(--mark-size);
  position: relative;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--neon), var(--cyan));
  clip-path: polygon(0 0, 100% 8%, 82% 100%, 18% 92%);
  filter: drop-shadow(0 0 8px rgba(181,55,242,.35));
  transition: filter .2s ease;
}
.brand:hover .brand-mark { filter: drop-shadow(0 0 14px rgba(181,55,242,.6)); }
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 2px;
  background: var(--bg);
  clip-path: polygon(0 0, 100% 8%, 82% 100%, 18% 92%);
}
.brand-mark span {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--lime);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .08em;
  color: var(--ink);
}
.brand-tagline {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .22em;
}

.site-nav { margin-left: auto; }
.nav-list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: block;
  padding: 10px 14px;
  color: var(--muted);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .04em;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.nav-link:hover {
  color: var(--ink);
  background: rgba(181,55,242,.1);
  border-color: rgba(181,55,242,.35);
  box-shadow: 0 0 18px rgba(181,55,242,.15);
}
.nav-link[aria-current="page"] {
  color: var(--lime);
  border-color: rgba(57,255,20,.4);
  background: rgba(57,255,20,.06);
  box-shadow: inset 0 -2px 0 var(--lime);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.nav-toggle:hover { border-color: var(--neon); color: var(--lime); }

.nav-toggle-box {
  width: 18px;
  height: 14px;
  position: relative;
  display: inline-block;
}
.nav-toggle-box span {
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--lime);
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle-box span:nth-child(1) { top: 0; }
.nav-toggle-box span:nth-child(2) { top: 6px; }
.nav-toggle-box span:nth-child(3) { top: 12px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Footer */
.site-footer {
  position: relative;
  margin-top: 96px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(18,32,74,.58), rgba(5,10,24,.97)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.02) 0 1px, transparent 1px 3px);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), var(--lime), transparent);
  opacity: .7;
  pointer-events: none;
}

.footer-top {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 48px 32px 24px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.6fr;
  gap: 36px 28px;
}

.footer-brand .brand { margin-bottom: 14px; }
.footer-brand > p {
  color: var(--muted);
  font-size: 14px;
  max-width: 34ch;
}

.footer-heading {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.footer-links li {
  position: relative;
  padding-left: 14px;
  color: var(--muted);
  font-size: 14px;
}
.footer-links li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--neon);
  font-size: 11px;
  line-height: 1.6;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-family: var(--font-display);
  letter-spacing: .04em;
  display: inline-block;
  transition: color .2s ease, transform .2s ease;
}
.footer-links a:hover {
  color: var(--lime);
  transform: translateX(4px);
}

.footer-bottom {
  max-width: var(--maxw);
  width: 100%;
  margin: 12px auto 0;
  padding: 16px 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  display: grid;
  gap: 8px;
}
.footer-bottom p { margin: 0; }
.footer-trust {
  max-width: 110ch;
  border-left: 3px solid var(--neon);
  padding-left: 12px;
}

/* Responsive */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    background: rgba(10,17,40,.97);
    border-top: 1px solid rgba(181,55,242,.3);
    border-bottom: 1px solid var(--line);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    z-index: 20;
  }
  .site-nav[data-open] {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 10px;
  }
  .nav-link {
    padding: 14px 16px;
    font-size: 15px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }
  .nav-link:hover {
    background: rgba(181,55,242,.08);
    border-color: transparent;
  }
  .nav-link[aria-current="page"] {
    color: var(--lime);
    background: rgba(57,255,20,.06);
    border-color: transparent;
    border-left: 3px solid var(--lime);
    box-shadow: none;
  }

  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .page-hero { padding-top: 40px; }
}

@media (min-width: 1081px) {
  .site-nav {
    position: static;
    display: block;
    visibility: visible;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    max-height: none;
    overflow: visible;
    background: transparent;
    border: 0;
  }
}

@media (max-width: 680px) {
  .header-shell { padding-inline: 16px; }
  .brand-mark { --mark-size: 40px; }
  .brand-name { font-size: 16px; }
  .brand-tagline { display: none; }
  .nav-toggle-label { display: none; }

  .container { padding-inline: 16px; }
  .section { padding-block: 40px; }
  .section-head { align-items: flex-start; flex-direction: column; gap: 8px; }

  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  .footer-top {
    grid-template-columns: 1fr;
    padding: 32px 16px 16px;
  }
  .footer-bottom {
    padding: 16px;
    margin-inline: 16px;
    max-width: calc(100% - 32px);
  }
  .footer-trust { padding-left: 8px; }

  .page-hero { padding: 36px 0 28px; }
  .lead { font-size: 16px; }
  .footer-links li { font-size: 14px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .scroll-progress { transition: none; }
}