@font-face {
  font-family:'Bebas Neue';
  src:url('BebasNeue-Regular.ttf') format('truetype');
  font-weight:400;
  font-display:swap;
}
@font-face {
  font-family:Inter;
  src:url('Inter-Regular.ttf') format('truetype');
  font-weight:400;
  font-display:swap;
}
:root {
  color-scheme:dark;
  --bg:#000;
  --surface:#0f0f0f;
  --line:#252525;
  --text:#a0a0a0;
  --white:#e8e8e8;
  --muted:#666;
  --red:#c41e3a;
  --display:'Bebas Neue',Impact,sans-serif;
  --body:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
* {
  box-sizing:border-box;
}
html {
  scroll-behavior:smooth;
  scroll-padding-top:100px;
}
body {
  margin:0;
  background:var(--bg);
  color:var(--text);
  font:16px/1.65 var(--body);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
body:before {
  content:'';
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
  opacity:.13;
  background-image:url('texture.svg');
  background-size:160px;
}
main {
  flex:1;
}
a {
  color:inherit;
  text-decoration:none;
}
button,input,select {
  font:inherit;
}
button,select {
  cursor:pointer;
}
button {
  color:inherit;
}
a,button,input,select,summary {
  touch-action:manipulation;
}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible {
  outline:2px solid var(--red);
  outline-offset:5px;
}
::selection {
  background:#ae1d31;
  color:#fff;
}
h1,h2,h3,h4,p {
  margin:0;
}
h1,h2,h3,h4 {
  font-family:var(--display);
  font-weight:700;
  color:var(--white);
  line-height:1.05;
}
p+p {
  margin-top:16px;
}
h2 {
  font-size:30px;
  letter-spacing:2.5px;
  text-transform:uppercase;
}
h3 {
  font-size:24px;
}
svg {
  display:block;
}
img {
  max-width:100%;
}
.wrap {
  width:min(1180px,calc(100% - 64px));
  margin-inline:auto;
}
.site-header {
  height:74px;
  border-bottom:1px solid rgba(100,100,100,.1);
  background:rgba(0,0,0,.88);
  backdrop-filter:blur(16px) saturate(140%);
  position:relative;
  z-index:3;
}
.header-inner {
  height:100%;
  display:flex;
  align-items:center;
  gap:58px;
}
.wordmark {
  display:inline-flex;
  align-items:center;
  gap:16px;
  flex-shrink:0;
  line-height:.9;
  color:var(--white);
  font-family:var(--display);
  font-weight:700;
}
.wordmark-logo {
  display:block;
  width:102px;
  height:auto;
}
.wordmark-code {
  font-size:24px;
  letter-spacing:2px;
  border-left:1px solid #3e3e42;
  padding-left:16px;
}
.nav-links {
  display:flex;
  align-items:stretch;
  align-self:stretch;
  gap:32px;
}
.nav-links a {
  display:flex;
  align-items:center;
  position:relative;
  font-family:system-ui,sans-serif;
  font-size:14px;
  color:#96979b;
  transition:color .16s;
}
.nav-links a:hover,.nav-links a[aria-current=page] {
  color:var(--red);
}
.nav-links a[aria-current=page]:after {
  content:'';
  height:2px;
  background:var(--red);
  position:absolute;
  bottom:-1px;
  left:0;
  right:0;
}
.nav-status {
  margin-left:auto;
  font-size:10px;
  letter-spacing:2px;
  color:#9d9da3;
  white-space:nowrap;
}
.status-dot {
  display:inline-block;
  width:5px;
  height:5px;
  background:var(--red);
  margin-right:8px;
  vertical-align:middle;
}
.menu-toggle {
  display:none;
  border:1px solid var(--line);
  background:transparent;
  padding:7px 11px;
  font-size:13px;
}
.skip-link {
  position:absolute;
  top:-100px;
  left:20px;
  z-index:10;
  background:var(--red);
  color:#fff;
  padding:8px 16px;
}
.skip-link:focus {
  top:10px;
}
.eyebrow {
  font-size:12px;
  letter-spacing:3px;
  color:var(--red);
  text-transform:uppercase;
}
.hero {
  position:relative;
  overflow:hidden;
  border-bottom:1px solid #222326;
}
.hero .wrap {
  position:relative;
  min-height:525px;
  display:flex;
  align-items:center;
  padding-block:58px;
  z-index:1;
}
.hero-content {
  width:67%;
  max-width:760px;
}
.hero h1 {
  font-size:clamp(48px,6.1vw,88px);
  letter-spacing:1.8px;
  line-height:.89;
  margin-top:23px;
  text-transform:uppercase;
}
.hero h1 .year {
  color:var(--red);
}
.hero-theme {
  font-size:17px;
  letter-spacing:5px;
  color:#d0d0d3;
  margin-top:22px;
}
.event-meta {
  display:flex;
  gap:28px;
  flex-wrap:wrap;
  margin-top:26px;
  font-size:14px;
  color:#dddde1;
}
.event-meta span {
  display:flex;
  gap:12px;
  align-items:center;
}
.event-meta span+span {
  border-left:1px solid #393a3e;
  padding-left:28px;
}
.icon {
  width:23px;
  height:23px;
  flex-shrink:0;
  fill:none;
  stroke:var(--red);
  stroke-width:1.65;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.hero-copy {
  max-width:600px;
  margin-top:27px;
  color:#949ba8;
  font-size:16px;
  line-height:1.55;
}
.hero-art {
  position:absolute;
  right:-80px;
  top:0;
  height:100%;
  width:57%;
  background:url('field-mark.svg') center right/contain no-repeat;
  opacity:.68;
  pointer-events:none;
}
.hero:after {
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,#08090a 3%,transparent 85%);
  pointer-events:none;
}
.hero-code {
  position:absolute;
  right:0;
  bottom:40px;
  text-align:right;
  font-size:10px;
  letter-spacing:2px;
  color:#797a82;
  z-index:1;
}
.archive-strip {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  border-bottom:1px solid var(--line);
  padding-block:15px;
  font-size:11px;
  letter-spacing:1.7px;
  text-transform:uppercase;
}
.archive-strip .archive-label {
  color:#d1d1d6;
}
.archive-strip .archive-label:before {
  content:'';
  display:inline-block;
  width:5px;
  height:5px;
  background:var(--red);
  margin-right:11px;
}
.archive-scope {
  display:flex;
  align-items:center;
  gap:12px;
  margin-top:18px;
  padding:16px 20px;
  border:1px solid rgba(107,28,28,.55);
  border-radius:10px;
  background:linear-gradient(110deg,rgba(74,28,28,.2),rgba(15,15,15,.88) 58%);
  color:#a0a0a0;
  font-size:13px;
}
.archive-scope .status-dot { flex:0 0 6px; }
.archive-scope b { color:#e8e8e8; letter-spacing:.08em; }
.archive-scope a { margin-left:auto; color:#d4a5a5; white-space:nowrap; }
.archive-scope a:hover { color:#e8e8e8; }
.stats {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
  padding-block:24px 40px;
}
.stat {
  position:relative;
  display:flex;
  gap:23px;
  padding:27px 25px 23px;
  border:1px solid var(--line);
  min-height:146px;
  background:rgba(15,15,15,.8);
  border-radius:12px;
  box-shadow:0 2px 20px rgba(0,0,0,.5);
}
.stat:before,.stat:after {
  content:'';
  width:8px;
  height:8px;
  position:absolute;
  border-color:var(--red);
}
.stat:before {
  top:-1px;
  left:-1px;
  border-left:1px solid var(--red);
  border-top:1px solid var(--red);
}
.stat:after {
  bottom:-1px;
  right:-1px;
  border-right:1px solid var(--red);
  border-bottom:1px solid var(--red);
}
.stat .icon {
  width:28px;
  height:28px;
  margin-top:6px;
}
.stat-number {
  display:block;
  font-family:var(--display);
  font-size:44px;
  line-height:.85;
  font-weight:700;
  color:var(--red);
  letter-spacing:1px;
}
.stat-title {
  font-family:var(--display);
  font-size:18px;
  font-weight:700;
  letter-spacing:2px;
  color:#ceced2;
  line-height:1.2;
  margin-top:8px;
}
.stat p {
  font-size:11px;
  line-height:1.5;
  margin-top:9px;
  color:#8d929c;
}
.stat-word {
  font-size:26px;
  color:#dddde0;
  line-height:1;
}
.section-title:after {
  content:'';
  display:block;
  background:var(--red);
  width:28px;
  height:2px;
  margin-top:13px;
}
.section-copy {
  margin-top:20px;
}
.section-copy p {
  font-size:15px;
  line-height:1.6;
}
.two-columns {
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:74px;
  padding-bottom:50px;
}
.two-columns>section+section {
  padding-left:48px;
  border-left:1px solid var(--line);
}
.stack-tags {
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:11px;
  margin-top:18px;
}
.stack-tag {
  border:1px solid var(--line);
  padding:13px 14px;
  display:flex;
  align-items:center;
  gap:15px;
}
.stack-tag b {
  font-size:12px;
  font-weight:400;
  color:#d5dbe3;
  display:block;
}
.stack-tag small {
  font-size:10px;
  color:#89919b;
  display:block;
}
.stack-tag:last-child {
  grid-column:1/-1;
}
.platform-section {
  padding:20px 0 56px;
  display:grid;
  grid-template-columns:.8fr 1.2fr;
  gap:100px;
}
.platform-section .intro p {
  max-width:400px;
  margin-top:21px;
  font-size:15px;
}
.editorial-links {
  border-top:1px solid var(--line);
}
.editorial-link {
  display:grid;
  grid-template-columns:32px 1fr 24px;
  gap:20px;
  align-items:center;
  border-bottom:1px solid var(--line);
  padding:20px 0;
  transition:border-color .15s;
}
.editorial-link:hover {
  border-color:var(--red);
}
.editorial-link .index {
  font-size:11px;
  color:var(--red);
}
.editorial-link h3 {
  font-size:25px;
  text-transform:uppercase;
  letter-spacing:1px;
}
.editorial-link p {
  font-size:12px;
  color:#9095a0;
  margin-top:3px;
}
.arrow {
  font-family:system-ui,sans-serif;
  font-size:22px;
  color:var(--red);
  font-weight:300;
}
.closing {
  padding:50px 0 57px;
  border-top:1px solid var(--line);
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
}
.closing h2 {
  font-size:40px;
  line-height:1.08;
  letter-spacing:1.5px;
}
.closing h2 span {
  color:#777b84;
}
.closing p {
  max-width:370px;
  font-size:14px;
  color:#9095a0;
}
.site-footer {
  border-top:1px solid var(--line);
  padding-block:22px;
  background:#060708;
}
.footer-inner {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  font-size:9px;
  letter-spacing:1.8px;
  text-transform:uppercase;
}
.footer-f13 {
  width:110px;
  height:auto;
  opacity:.62;
  filter:grayscale(20%);
}
.footer-inner .motto {
  color:var(--red);
  display:flex;
  align-items:center;
  gap:13px;
}
.motto:before {
  content:'';
  height:1px;
  width:36px;
  background:#9a2432;
}
.info-hero .wrap {
  min-height:440px;
  padding-block:48px;
}
.info-hero h1 {
  font-size:clamp(48px,5.7vw,82px);
}
.info-hero .hero-content {
  width:68%;
}
.info-note {
  padding:16px 0 26px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:#9095a0;
}
.page-intro {
  padding-top:62px;
  padding-bottom:35px;
  border-bottom:1px solid var(--line);
  position:relative;
}
.page-intro h1 {
  font-size:clamp(43px,5.5vw,68px);
  text-transform:uppercase;
  letter-spacing:2px;
  margin-top:12px;
}
.page-intro .lead {
  margin-top:16px;
  max-width:690px;
  font-size:16px;
  color:#949ba8;
}
.page-intro .page-index {
  position:absolute;
  right:0;
  top:80px;
  font-size:12px;
  letter-spacing:2px;
  color:#626671;
}
.page-index:before {
  content:'';
  display:block;
  height:45px;
  width:1px;
  background:var(--red);
  margin-left:auto;
  margin-bottom:15px;
}
.infrastructure-intro {
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:90px;
  padding-block:32px 37px;
}
.infrastructure-intro p {
  font-size:15px;
}
.offline-note {
  border-left:2px solid var(--red);
  padding-left:20px;
}
.offline-note a { color:#d4a5a5; text-decoration:underline; text-underline-offset:3px; }
.offline-note b {
  display:block;
  font-weight:400;
  font-size:12px;
  letter-spacing:1px;
  color:#e1e1e5;
  margin-bottom:7px;
}
.offline-note p {
  font-size:12px;
  color:#9399a4;
}
.diagram-section {
  padding:29px 32px 34px;
  border:1px solid var(--line);
  background:linear-gradient(#16171a 1px,transparent 1px),linear-gradient(90deg,#16171a 1px,transparent 1px),#090a0b;
  background-size:32px 32px;
}
.diagram-heading {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
}
.diagram-heading h2 {
  font-size:23px;
  letter-spacing:2px;
}
.diagram-heading>span {
  color:#878d98;
  font-size:10px;
  letter-spacing:1.5px;
}
.architecture {
  margin-top:34px;
  display:grid;
  grid-template-columns:1fr 32px 1fr 32px 1fr 32px 1fr;
  align-items:center;
}
.architecture-node {
  position:relative;
  min-height:155px;
  border:1px solid #3a3c41;
  background:#0b0d0f;
  padding:22px 17px;
}
.node-number {
  display:block;
  color:var(--red);
  font-size:10px;
  letter-spacing:2px;
  margin-bottom:14px;
}
.architecture-node h3 {
  font-size:23px;
  line-height:1.1;
  letter-spacing:.5px;
}
.architecture-node p {
  font-size:11px;
  color:#9299a5;
  margin-top:9px;
  line-height:1.5;
}
.architecture-connector {
  height:1px;
  background:#8c2935;
  position:relative;
}
.architecture-connector:after {
  content:'';
  position:absolute;
  right:0;
  top:-2px;
  height:5px;
  width:5px;
  background:var(--red);
}
.diagram-footnote {
  margin-top:22px;
  color:#898f9a;
  font-size:11px;
  max-width:700px;
}
.network-components {
  display:flex;
  gap:20px;
  border-top:1px solid #292b30;
  margin-top:28px;
  padding-top:23px;
  align-items:center;
}
.network-components .label {
  font-size:10px;
  color:#8a909b;
  letter-spacing:2px;
  max-width:100px;
}
.network-component {
  display:flex;
  align-items:center;
  gap:13px;
  border:1px solid #303237;
  background:#0b0d0f;
  padding:12px 18px;
}
.network-component b {
  font-weight:400;
  font-size:12px;
  color:#dddde3;
}
.network-component small {
  display:block;
  font-size:10px;
  color:#939aa4;
}
.stack-details {
  padding-block:45px 55px;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  column-gap:70px;
}
.stack-row {
  display:grid;
  grid-template-columns:32px 1fr;
  gap:18px;
  border-top:1px solid var(--line);
  padding-block:22px;
}
.stack-row .icon {
  margin-top:3px;
}
.stack-row h3 {
  font-size:24px;
  letter-spacing:.6px;
}
.stack-row p {
  font-size:13px;
  margin-top:8px;
  color:#989da8;
}
.archive-context {
  padding-block:20px;
  display:grid;
  grid-template-columns:180px 1fr;
  gap:32px;
  border-bottom:1px solid var(--line);
}
.archive-context .context-number {
  font-family:var(--display);
  color:var(--white);
  font-size:38px;
  line-height:1;
  font-weight:700;
}
.archive-context .context-label {
  font-size:10px;
  letter-spacing:1.5px;
  margin-top:5px;
  display:block;
  color:#9096a1;
}
.archive-context p {
  font-size:12px;
  color:#969ca7;
  align-self:center;
  max-width:780px;
}
.filters {
  padding-block:26px 25px;
}
.filter-fields {
  display:grid;
  grid-template-columns:1fr 220px;
  gap:20px;
}
.field-label {
  display:block;
  font-size:10px;
  letter-spacing:1.7px;
  text-transform:uppercase;
  color:#979da8;
  margin-bottom:8px;
}
.search-field {
  position:relative;
}
.search-field .icon {
  position:absolute;
  left:15px;
  top:15px;
  width:18px;
  height:18px;
  stroke:#828895;
}
.search-field input {
  padding-left:43px;
}
input[type=search],select {
  width:100%;
  border:1px solid #383a40;
  background:#0b0d0f;
  color:#d9dbe2;
  height:48px;
  padding:0 15px;
  border-radius:0;
}
input[type=search] {
  padding-left:43px;
}
input::placeholder {
  color:#808794;
}
select {
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
  color-scheme:dark;
  padding:0 42px 0 15px;
  border-color:#39343a;
  border-radius:8px;
  background-color:#0f0f0f;
  background-image:linear-gradient(45deg,transparent 50%,#d4a5a5 50%),linear-gradient(135deg,#d4a5a5 50%,transparent 50%);
  background-position:calc(100% - 19px) 20px,calc(100% - 14px) 20px;
  background-size:5px 5px,5px 5px;
  background-repeat:no-repeat;
  cursor:pointer;
  transition:border-color .16s ease,box-shadow .16s ease,background-color .16s ease;
}
select:hover {
  border-color:#6b1c1c;
  background-color:#141112;
}
select:focus-visible {
  border-color:#8b3a3a;
  outline:2px solid rgba(196,30,58,.45);
  outline-offset:2px;
  box-shadow:0 0 0 4px rgba(196,30,58,.12);
}
select option {
  color:#e8e8e8;
  background:#0f0f0f;
}
.enhanced-native-select {
  position:absolute!important;
  width:1px!important;
  height:1px!important;
  padding:0!important;
  margin:-1px!important;
  overflow:hidden!important;
  clip:rect(0,0,0,0)!important;
  clip-path:inset(50%)!important;
  white-space:nowrap!important;
  border:0!important;
}
.difficulty-select {
  position:relative;
}
.difficulty-select-button {
  display:flex;
  align-items:center;
  justify-content:space-between;
  width:100%;
  min-height:48px;
  padding:0 17px 0 15px;
  border:1px solid #39343a;
  border-radius:8px;
  background:#0f0f0f;
  color:#e8e8e8;
  text-align:left;
  transition:border-color .16s ease,background-color .16s ease,box-shadow .16s ease;
}
.difficulty-select-button:hover,
.difficulty-select-button[aria-expanded="true"] {
  border-color:#6b1c1c;
  background:#141112;
}
.difficulty-select-button:focus-visible {
  outline:2px solid rgba(196,30,58,.45);
  outline-offset:2px;
  border-color:#8b3a3a;
  box-shadow:0 0 0 4px rgba(196,30,58,.12);
}
.difficulty-chevron {
  width:8px;
  height:8px;
  flex:0 0 8px;
  margin:0 2px 4px 12px;
  border-right:1.5px solid #d4a5a5;
  border-bottom:1.5px solid #d4a5a5;
  transform:rotate(45deg);
  transition:transform .16s ease,margin .16s ease;
}
.difficulty-select-button[aria-expanded="true"] .difficulty-chevron {
  margin-bottom:-4px;
  transform:rotate(225deg);
}
.difficulty-options {
  position:absolute;
  z-index:6;
  top:calc(100% + 7px);
  left:0;
  right:0;
  max-height:240px;
  overflow-y:auto;
  padding:5px;
  border:1px solid #44323a;
  border-radius:8px;
  background:#0b0b0c;
  box-shadow:0 14px 36px rgba(0,0,0,.72),0 0 20px rgba(196,30,58,.08);
}
.difficulty-options[hidden] {
  display:none;
}
.difficulty-option {
  display:flex;
  align-items:center;
  min-height:40px;
  padding:7px 11px;
  border-radius:5px;
  color:#a0a0a0;
  cursor:pointer;
  transition:background-color .12s ease,color .12s ease;
}
.difficulty-option:hover,
.difficulty-option.is-active {
  background:rgba(107,28,28,.34);
  color:#f0e7e9;
}
.difficulty-option[aria-selected="true"] {
  color:#e8e8e8;
  background:rgba(196,30,58,.16);
}
.difficulty-option[aria-selected="true"].is-active,
.difficulty-option[aria-selected="true"]:hover {
  background:rgba(196,30,58,.3);
}
.category-filters {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:21px;
}
.filter-button {
  font-size:11px;
  background:transparent;
  border:1px solid #35383f;
  padding:7px 12px;
  color:#a0a6b2;
  transition:border-color .15s,color .15s;
}
.filter-button:hover {
  border-color:#777c86;
  color:#eeeef0;
}
.filter-button[aria-pressed=true] {
  border-color:var(--red);
  color:#fff;
  background:#201014;
}
.results-line {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:15px;
  margin-top:18px;
  font-size:11px;
  color:#939ba7;
}
.reset-filters {
  border:0;
  background:none;
  padding:0;
  color:var(--red);
  font-size:11px;
  text-decoration:underline;
  text-underline-offset:4px;
}
.challenge-groups {
  padding-bottom:55px;
}
.challenge-category {
  margin-top:26px;
}
.category-heading {
  display:flex;
  align-items:center;
  gap:20px;
  margin-bottom:18px;
}
.category-heading h2 {
  font-size:25px;
  letter-spacing:2px;
  flex-shrink:0;
}
.category-heading:after {
  content:'';
  height:1px;
  background:var(--line);
  flex:1;
}
.category-heading .category-count {
  font-size:10px;
  color:#999fac;
  letter-spacing:1px;
  white-space:nowrap;
}
.challenge-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:14px;
}
.challenge-card {
  border:1px solid #2c2e34;
  padding:23px 23px 19px;
  min-height:136px;
  position:relative;
  border-radius:12px;
  background:linear-gradient(145deg,rgba(25,25,25,.95),rgba(15,15,15,.95));
  box-shadow:0 2px 20px rgba(0,0,0,.45);
  display:flex;
  flex-direction:column;
  justify-content:space-between;
  background:rgba(11,13,15,.45);
  transition:border-color .16s,background .16s;
}
.challenge-card:hover {
  border-color:#9b2938;
  background:#101013;
}
.challenge-card:after {
  content:'';
  position:absolute;
  width:6px;
  height:6px;
  right:-1px;
  bottom:-1px;
  border-right:1px solid #8f2634;
  border-bottom:1px solid #8f2634;
}
.challenge-card h3 {
  font-size:25px;
  line-height:1.1;
  letter-spacing:.2px;
  max-width:95%;
}
.card-meta {
  display:flex;
  align-items:center;
  gap:15px;
  margin-top:22px;
}
.card-points {
  font-family:var(--display);
  font-weight:700;
  font-size:27px;
  line-height:1;
  color:var(--red);
}
.card-points small {
  font-family:var(--body);
  font-weight:400;
  font-size:9px;
  letter-spacing:1px;
  color:#979eab;
  margin-left:5px;
}
.difficulty {
  font-size:9px;
  letter-spacing:1.5px;
  color:#bdc3cf;
  border-left:1px solid #3e4046;
  padding-left:15px;
  text-transform:uppercase;
}
.card-meta .card-arrow {
  margin-left:auto;
  font-size:16px;
  color:#7c828e;
}
.challenge-card:hover .card-arrow {
  color:var(--red);
}
.no-results {
  border:1px solid var(--line);
  padding:45px 20px;
  text-align:center;
}
.no-results h2 {
  font-size:24px;
}
.no-results p {
  font-size:13px;
  margin-top:13px;
}
[hidden] {
  display:none!important;
}
.filters {
  display:none;
}
.js .filters {
  display:block;
}
.detail-header {
  padding:46px 0 29px;
  border-bottom:1px solid var(--line);
}
.back-link {
  font-size:12px;
  color:#9fa6b2;
  display:inline-flex;
  gap:12px;
  align-items:center;
  margin-bottom:31px;
}
.back-link:hover {
  color:var(--white);
}
.back-link .arrow {
  font-size:18px;
}
.detail-header h1 {
  font-size:clamp(39px,5.5vw,66px);
  letter-spacing:.5px;
  max-width:1000px;
  margin-top:13px;
  line-height:1;
}
.detail-layout {
  display:grid;
  grid-template-columns:minmax(0,1fr) 280px;
  gap:85px;
  padding-block:37px 55px;
}
.detail-description h2,.hint-section h2 {
  font-size:24px;
  letter-spacing:1.5px;
}
.description-body {
  margin-top:23px;
  font-size:15px;
  line-height:1.7;
  overflow-wrap:anywhere;
}
.description-body p+p {
  margin-top:20px;
}
.description-body pre {
  white-space:pre-wrap;
  background:#101215;
  border:1px solid var(--line);
  padding:16px;
  font:13px/1.7 var(--body);
  overflow-wrap:anywhere;
  margin-block:20px;
}
.description-body code {
  color:#ced4df;
  font-size:.92em;
  background:#14161a;
  padding:1px 4px;
}
.description-body pre code {
  padding:0;
  background:transparent;
}
.description-body strong {
  font-weight:400;
  color:#e3e5eb;
}
.description-body blockquote {
  border-left:2px solid #555a66;
  padding-left:18px;
  margin:20px 0;
  color:#b2b7c2;
}
.description-body ul,.description-body ol {
  padding-left:23px;
  margin:14px 0;
}
.description-body h3 {
  font-size:23px;
  margin-block:25px 14px;
}
.detail-sidebar {
  border-top:1px solid var(--red);
  padding-top:10px;
  align-self:start;
}
.detail-metadata {
  margin:0;
}
.detail-metadata>div {
  padding:13px 0;
  border-bottom:1px solid var(--line);
}
.detail-metadata dt {
  font-size:10px;
  letter-spacing:1.4px;
  text-transform:uppercase;
  color:#8f97a4;
}
.detail-metadata dd {
  margin:4px 0 0;
  color:#e2e4eb;
  font-size:14px;
}
.detail-metadata .points-value {
  font-family:var(--display);
  font-size:36px;
  line-height:1;
  color:var(--red);
  font-weight:700;
}
.connection-record {
  margin-top:25px;
  border:1px solid var(--line);
  padding:17px 15px;
}
.connection-record h3 {
  font-family:var(--body);
  font-weight:400;
  font-size:10px;
  letter-spacing:1px;
  color:#979eac;
  text-transform:uppercase;
}
.connection-record p {
  font-size:11px;
  overflow-wrap:anywhere;
  margin-top:10px;
}
.offline-status {
  display:block;
  margin-top:12px;
  color:var(--red);
  font-size:10px;
  letter-spacing:2px;
}
.detail-aside-note {
  font-size:11px;
  line-height:1.6;
  color:#9099a7;
  margin-top:22px;
}
.hint-section {
  margin-top:38px;
}
.hint-section .hints-intro {
  margin-top:14px;
  font-size:12px;
  color:#959daa;
}
.hint-list {
  margin-top:18px;
  border-top:1px solid var(--line);
}
.hint-list details {
  border-bottom:1px solid var(--line);
}
.hint-list summary {
  padding:15px 0;
  cursor:pointer;
  color:#d3d7e1;
  font-size:13px;
  display:flex;
  align-items:center;
  gap:12px;
  list-style:none;
}
.hint-list summary::-webkit-details-marker {
  display:none;
}
.hint-list summary:before {
  content:'+';
  font-size:20px;
  color:var(--red);
  width:16px;
}
.hint-list details[open] summary:before {
  content:'−';
}
.hint-list summary small {
  font-size:10px;
  color:#8f98a7;
  margin-left:auto;
  white-space:nowrap;
}
.hint-content {
  padding:0 0 18px 28px;
  font-size:13px;
  line-height:1.7;
  overflow-wrap:anywhere;
}
.detail-bottom {
  display:flex;
  justify-content:space-between;
  gap:20px;
  padding-bottom:40px;
  font-size:12px;
}
.detail-bottom a {
  color:#b2bac8;
  display:flex;
  gap:12px;
  align-items:center;
}
.detail-bottom a:hover {
  color:var(--white);
}
.not-found {
  padding-block:100px;
}
.not-found h1 {
  font-size:70px;
}
.not-found p {
  margin-top:20px;
}
.not-found a {
  display:inline-block;
  margin-top:25px;
  color:var(--red);
  border-bottom:1px solid var(--red);
}
@media(min-width:1600px) {
  .wrap {
    width:min(1320px,calc(100% - 100px));
  }
  .hero .wrap {
    min-height:550px;
  }
  .info-hero .wrap {
    min-height:450px;
  }
  .hero h1 {
    font-size:92px;
  }
  .info-hero h1 {
    font-size:86px;
  }
}
@media(max-width:1050px) {
  .wrap {
    width:calc(100% - 48px);
  }
  .header-inner {
    gap:35px;
  }
  .nav-links {
    gap:24px;
  }
  .nav-status {
    display:none;
  }
  .hero-content {
    width:75%;
  }
  .hero-art {
    right:-120px;
    width:65%;
    opacity:.55;
  }
  .stats {
    gap:12px;
  }
  .stat {
    padding:23px 18px;
    gap:14px;
  }
  .stat .icon {
    width:23px;
    height:23px;
  }
  .stat-number {
    font-size:38px;
  }
  .stat-word {
    font-size:21px;
  }
  .stat-title {
    font-size:16px;
  }
  .two-columns {
    gap:35px;
  }
  .two-columns>section+section {
    padding-left:30px;
  }
  .platform-section {
    gap:50px;
  }
  .stack-tags {
    grid-template-columns:1fr;
  }
  .stack-tag:last-child {
    grid-column:auto;
  }
  .infrastructure-intro {
    gap:45px;
  }
  .architecture {
    grid-template-columns:1fr 22px 1fr 22px 1fr 22px 1fr;
  }
  .architecture-node {
    padding:19px 13px;
  }
  .architecture-node h3 {
    font-size:21px;
  }
  .detail-layout {
    gap:40px;
    grid-template-columns:minmax(0,1fr) 240px;
  }
  .challenge-card {
    padding:20px;
  }
  .challenge-card h3 {
    font-size:23px;
  }
}
@media(max-width:760px) {
  .wrap {
    width:calc(100% - 36px);
  }
  .site-header {
    height:68px;
  }
  .header-inner {
    gap:24px;
  }
  .wordmark {
    gap:11px;
  }
  .wordmark-logo {
    width:88px;
  }
  .wordmark-code {
    font-size:20px;
    padding-left:11px;
  }
  .nav-links {
    gap:20px;
  }
  .nav-links a {
    font-size:12px;
  }
  .hero .wrap {
    min-height:460px;
    padding-block:44px;
  }
  .hero h1 {
    font-size:65px;
  }
  .hero-content,.info-hero .hero-content {
    width:92%;
  }
  .hero-art {
    right:-175px;
    width:86%;
    opacity:.35;
  }
  .hero-theme {
    font-size:14px;
    letter-spacing:4px;
  }
  .hero-code {
    display:none;
  }
  .hero-copy {
    max-width:530px;
    font-size:15px;
  }
  .event-meta {
    gap:18px;
    font-size:12px;
  }
  .event-meta span+span {
    padding-left:18px;
  }
  .info-hero .wrap {
    min-height:430px;
  }
  .info-hero h1 {
    font-size:62px;
  }
  .stats {
    grid-template-columns:repeat(2,1fr);
    padding-bottom:32px;
    gap:14px;
  }
  .stat {
    min-height:130px;
    padding:23px;
  }
  .stat-number {
    font-size:40px;
  }
  .stat-word {
    font-size:26px;
  }
  .stat-title {
    font-size:17px;
  }
  .two-columns {
    grid-template-columns:1fr;
    gap:35px;
    padding-bottom:35px;
  }
  .two-columns>section+section {
    padding-left:0;
    padding-top:30px;
    border-left:0;
    border-top:1px solid var(--line);
  }
  .stack-tags {
    grid-template-columns:repeat(2,1fr);
  }
  .stack-tag:last-child {
    grid-column:1/-1;
  }
  .platform-section {
    grid-template-columns:1fr;
    gap:30px;
    padding-block:9px 40px;
  }
  .platform-section .intro p {
    max-width:650px;
  }
  .closing {
    padding-block:35px;
    display:block;
  }
  .closing h2 {
    font-size:34px;
  }
  .closing p {
    max-width:500px;
    margin-top:20px;
  }
  .footer-inner {
    flex-wrap:wrap;
    gap:13px;
    font-size:8px;
  }
  .archive-strip {
    font-size:9px;
    letter-spacing:1px;
  }
  .archive-strip>span:last-child {
    display:none;
  }
  .archive-scope { align-items:flex-start; flex-wrap:wrap; padding:14px; font-size:12px; }
  .archive-scope a { margin-left:18px; }
  .page-intro {
    padding-top:42px;
    padding-bottom:28px;
  }
  .page-intro h1 {
    font-size:54px;
  }
  .page-intro .page-index {
    display:none;
  }
  .page-intro .lead {
    font-size:15px;
  }
  .infrastructure-intro {
    grid-template-columns:1fr;
    gap:23px;
    padding-block:27px;
  }
  .diagram-section {
    padding:24px;
  }
  .diagram-heading {
    display:block;
  }
  .diagram-heading>span {
    display:block;
    margin-top:8px;
  }
  .architecture {
    grid-template-columns:1fr;
    margin-top:25px;
  }
  .architecture-node {
    min-height:0;
    padding:18px 20px;
  }
  .node-number {
    float:right;
    margin-bottom:0;
  }
  .architecture-node h3 {
    font-size:25px;
  }
  .architecture-connector {
    height:22px;
    width:1px;
    margin-left:30px;
  }
  .architecture-connector:after {
    right:-2px;
    top:auto;
    bottom:0;
  }
  .network-components {
    flex-wrap:wrap;
    gap:12px;
  }
  .network-components .label {
    width:100%;
    max-width:none;
  }
  .network-component {
    flex:1;
    min-width:170px;
    padding:12px;
  }
  .stack-details {
    gap:0;
    grid-template-columns:1fr;
    padding-block:35px;
  }
  .archive-context {
    grid-template-columns:140px 1fr;
    gap:20px;
  }
  .challenge-grid {
    grid-template-columns:repeat(2,1fr);
  }
  .challenge-card h3 {
    font-size:24px;
  }
  .category-filters {
    gap:7px;
  }
  .filter-button {
    padding:6px 10px;
  }
  .detail-layout {
    grid-template-columns:1fr;
    gap:35px;
  }
  .detail-sidebar {
    grid-row:1;
  }
  .detail-metadata {
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:0 24px;
  }
  .detail-metadata .points-value {
    font-size:24px;
  }
  .connection-record {
    max-width:400px;
    margin-top:17px;
  }
  .detail-aside-note {
    margin-top:15px;
  }
  .detail-header {
    padding-top:30px;
  }
  .detail-header h1 {
    font-size:48px;
  }
  .detail-bottom {
    padding-bottom:30px;
  }
}
@media(max-width:580px) {
  .site-header {
    height:auto;
    min-height:68px;
  }
  .header-inner {
    min-height:68px;
    flex-wrap:wrap;
    justify-content:space-between;
    gap:0;
  }
  .js .menu-toggle {
    display:block;
  }
  .nav-links {
    width:100%;
    gap:23px;
    min-height:43px;
    border-top:1px solid var(--line);
    justify-content:space-between;
  }
  .nav-links a {
    padding:10px 0;
    font-size:12px;
  }
  .js .nav-links:not(.is-open) {
    display:none;
  }
  .hero .wrap {
    min-height:425px;
    padding-block:38px;
  }
  .hero h1 {
    font-size:clamp(42px,10.5vw,60px);
    letter-spacing:.6px;
  }
  .hero-content,.info-hero .hero-content {
    width:100%;
  }
  .hero-art {
    right:-180px;
    width:105%;
    opacity:.26;
  }
  .hero-theme {
    font-size:12px;
    letter-spacing:3px;
    margin-top:19px;
  }
  .eyebrow {
    font-size:10px;
    letter-spacing:2px;
  }
  .event-meta {
    display:block;
    margin-top:22px;
    font-size:12px;
  }
  .event-meta span+span {
    border-left:0;
    padding-left:0;
    margin-top:10px;
  }
  .event-meta .icon {
    width:18px;
    height:18px;
  }
  .hero-copy {
    margin-top:22px;
    font-size:14px;
  }
  .info-hero .wrap {
    min-height:430px;
  }
  .stats {
    gap:10px;
    padding-block:20px 30px;
  }
  .stat {
    padding:20px 14px;
    gap:11px;
    min-height:133px;
  }
  .stat .icon {
    width:20px;
    height:20px;
  }
  .stat-number {
    font-size:34px;
  }
  .stat-word {
    font-size:20px;
    letter-spacing:.3px;
  }
  .stat-title {
    font-size:14px;
    letter-spacing:1.5px;
  }
  .stat p {
    font-size:10px;
    line-height:1.45;
  }
  .section-copy p {
    font-size:14px;
  }
  h2 {
    font-size:27px;
  }
  .stack-tags {
    grid-template-columns:1fr;
  }
  .stack-tag:last-child {
    grid-column:auto;
  }
  .footer-inner {
    display:block;
    line-height:1.8;
    letter-spacing:1px;
  }
  .footer-inner .motto {
    margin-top:11px;
    font-size:8px;
  }
  .page-intro h1 {
    font-size:43px;
    letter-spacing:1px;
  }
  .page-intro .lead {
    font-size:14px;
  }
  .diagram-section {
    padding:20px 17px;
  }
  .diagram-heading h2 {
    font-size:21px;
  }
  .network-component {
    min-width:100%;
    flex:auto;
  }
  .archive-context {
    grid-template-columns:1fr;
    gap:12px;
  }
  .archive-context>div {
    display:flex;
    align-items:center;
    gap:13px;
  }
  .archive-context .context-label {
    margin-top:0;
  }
  .filter-fields {
    grid-template-columns:1fr;
    gap:16px;
  }
  .category-filters {
    gap:7px;
  }
  .filter-button {
    font-size:10px;
    padding:6px 9px;
  }
  .challenge-grid {
    grid-template-columns:1fr;
    gap:12px;
  }
  .challenge-card {
    min-height:122px;
    padding:22px;
  }
  .challenge-card h3 {
    font-size:26px;
  }
  .card-meta {
    margin-top:18px;
  }
  .category-heading {
    gap:14px;
  }
  .category-heading h2 {
    font-size:23px;
    letter-spacing:1px;
  }
  .category-heading .category-count {
    font-size:9px;
  }
  .detail-header h1 {
    font-size:40px;
  }
  .detail-layout {
    padding-top:25px;
  }
  .detail-metadata dd {
    font-size:12px;
  }
  .description-body {
    font-size:14px;
  }
  .detail-bottom {
    font-size:11px;
  }
  .closing h2 {
    font-size:32px;
  }
}
@media(max-width:580px) {
  .stats {
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .stat,.stat>div {
    min-width:0;
  }
  .stat p {
    overflow-wrap:anywhere;
  }
  .category-heading {
    flex-wrap:wrap;
    gap:8px 14px;
  }
  .category-heading h2 {
    max-width:100%;
    flex-shrink:1;
  }
  .category-heading:after {
    display:none;
  }
}
@media(max-width:360px) {
  .stat {
    padding:18px 10px;
    gap:8px;
  }
  .stat .icon {
    width:16px;
    height:16px;
  }
  .stat-word {
    font-size:18px;
  }
  .stat-title {
    font-size:13px;
    letter-spacing:1px;
  }
  .page-intro h1 {
    font-size:36px;
  }
}
@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto;
  }
  *,*:before,*:after {
    transition:none!important;
  }
}

/* CTFd-inspired application layout */
:root {
  --surface:#0f0f0f;
  --line:#292929;
}
.wrap {
  width:min(1140px,calc(100% - 40px));
}
.site-header {
  position:sticky;
  top:0;
  height:62px;
  background:rgba(0,0,0,.94);
  border-bottom-color:rgba(100,100,100,.18);
  box-shadow:0 8px 26px rgba(0,0,0,.35);
}
.header-inner {
  gap:38px;
}
.wordmark {
  gap:11px;
}
.wordmark-logo {
  width:88px;
}
.wordmark-code {
  font-size:21px;
}
.nav-links {
  gap:25px;
}
.nav-links a {
  font-family:var(--body);
  font-size:14px;
  color:#a0a0a0;
}
.nav-links a:hover,.nav-links a[aria-current=page] {
  color:#e8e8e8;
}
.nav-links a[aria-current=page]:after {
  height:2px;
  background:var(--red);
}
.nav-status {
  font-size:10px;
  letter-spacing:1.5px;
}
.hero {
  background:radial-gradient(ellipse at 50% 45%,#111 0%,#050505 65%,#000 100%);
}
.hero .wrap {
  min-height:390px;
  justify-content:center;
  padding-block:54px;
}
.hero-content {
  width:min(760px,100%);
  text-align:center;
}
.hero h1 {
  font-size:clamp(54px,8vw,90px);
  letter-spacing:2px;
}
.hero-theme {
  margin-top:12px;
}
.event-meta {
  justify-content:center;
}
.hero-copy {
  margin:20px auto 0;
  max-width:650px;
}
.hero-code {
  display:none;
}
.archive-strip {
  border:1px solid var(--line);
  border-top:0;
  padding:14px 18px;
  background:#0b0b0b;
}
.archive-scope {
  border-radius:8px;
  background:#101010;
  border-color:#392326;
}
.stats {
  gap:14px;
  padding-block:20px 34px;
}
.stat {
  min-height:130px;
  padding:21px 20px;
  gap:16px;
  background:rgba(15,15,15,.9);
}
.platform-section {
  gap:56px;
}
.editorial-link {
  padding:17px 14px;
  background:#0b0b0b;
}
.closing {
  border:1px solid var(--line);
  border-radius:10px;
  padding:30px;
  margin-bottom:38px;
  background:#0b0b0b;
}
.site-footer {
  background:#080808;
}
.page-intro {
  padding:36px 0 24px;
  border-bottom:1px solid var(--line);
}
.page-intro h1 {
  font-size:clamp(38px,5vw,54px);
  margin-top:7px;
}
.page-intro .lead {
  margin-top:10px;
  max-width:760px;
}
.page-intro .page-index {
  top:45px;
}
.archive-context {
  border:1px solid var(--line);
  border-radius:9px;
  padding:17px 20px;
  background:#0e0e0e;
}
.filters {
  margin-top:20px;
  padding:20px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#0d0d0d;
}
.filter-fields {
  grid-template-columns:minmax(0,1fr) 230px;
  gap:16px;
}
input[type=search],select,.difficulty-select-button {
  border-radius:7px;
  background-color:#111;
}
.category-filters {
  gap:7px;
  margin-top:17px;
}
.filter-button {
  border-radius:6px;
  padding:7px 11px;
  background:#111;
}
.challenge-category {
  margin-top:29px;
}
.category-heading {
  margin-bottom:13px;
}
.category-heading h2 {
  font-size:24px;
}
.challenge-grid {
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px;
}
.challenge-card {
  min-height:112px;
  padding:17px 18px 15px;
  border-radius:9px;
  background:#101010;
  box-shadow:0 2px 12px rgba(0,0,0,.3);
}
.challenge-card h3 {
  font-size:22px;
}
.card-meta {
  margin-top:16px;
}
.challenge-card:hover {
  transform:translateY(-2px);
  border-color:#6b1c1c;
  background:#141112;
}
.detail-header {
  padding:32px 0 23px;
}
.back-link {
  margin-bottom:20px;
}
.detail-header h1 {
  font-size:clamp(38px,5vw,58px);
}
.detail-layout {
  grid-template-columns:minmax(0,1fr) 300px;
  gap:38px;
  padding-top:26px;
}
.detail-sidebar {
  padding:18px;
  border:1px solid var(--line);
  border-top:2px solid var(--red);
  border-radius:9px;
  background:#0e0e0e;
}
@media(max-width:900px) {
  .header-inner { gap:20px; }
  .nav-links { gap:17px; }
  .nav-status { display:none; }
  .stats { grid-template-columns:repeat(2,1fr); }
  .detail-layout { grid-template-columns:minmax(0,1fr) 260px; gap:25px; }
}
@media(max-width:680px) {
  .wrap { width:min(100% - 32px,540px); }
  .site-header { height:60px; }
  .header-inner { gap:12px; }
  .wordmark-logo { width:78px; }
  .wordmark-code { font-size:18px; padding-left:10px; }
  .nav-links { gap:0; }
  .hero .wrap { min-height:350px; }
  .hero h1 { font-size:clamp(47px,13vw,70px); }
  .event-meta { flex-wrap:wrap; gap:10px 18px; }
  .archive-strip { align-items:flex-start; flex-direction:column; gap:5px; }
  .stats { gap:10px; }
  .stat { padding:16px 13px; gap:10px; }
  .stat .icon { width:21px; height:21px; }
  .platform-section { grid-template-columns:1fr; gap:24px; }
  .closing { display:block; padding:22px; }
  .closing p { margin-top:16px; }
  .page-intro .page-index { display:none; }
  .filters { padding:14px; }
  .filter-fields { grid-template-columns:1fr; }
  .challenge-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:9px; }
  .challenge-card { min-height:110px; padding:14px; }
  .challenge-card h3 { font-size:19px; }
  .card-meta { gap:10px; }
  .difficulty { padding-left:10px; }
  .detail-layout { grid-template-columns:1fr; }
}
@media(max-width:420px) {
  .challenge-grid { grid-template-columns:1fr; }
  .stat { display:block; }
  .stat>div { margin-top:12px; }
}