/* Ten Defence — holding page
   Palette taken from the logo lockup. */
:root {
  --ink: #121518;        /* graphite background */
  --ink-2: #181C20;      /* raised surface */
  --line: #2A3036;       /* hairlines */
  --mute: #868B91;       /* secondary text */
  --cream: #E8E4DC;      /* primary text, logo */
  --bronze: #B8853F;     /* single accent */

  --f-display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --gutter: clamp(16px, 4vw, 56px);
  --max: 1360px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--cream);
  font-family: var(--f-display);
  font-variation-settings: "wdth" 100;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; }
:focus-visible { outline: 1px solid var(--bronze); outline-offset: 4px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--gutter); top: 12px; z-index: 10; background: var(--cream); color: var(--ink); padding: 8px 12px; }

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px var(--gutter);
  background: color-mix(in srgb, var(--ink) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.top.scrolled { border-bottom-color: var(--line); }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.mark { width: 34px; height: auto; fill: var(--cream); display: block; }
.brand-rule { width: 1px; height: 24px; background: var(--line); }
.brand-name {
  font-variation-settings: "wdth" 112; font-weight: 600;
  font-size: 15px; letter-spacing: .22em;
}
.top-nav { display: flex; align-items: center; gap: 28px; }
.top-nav a {
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; text-decoration: none; color: var(--mute);
  transition: color .2s;
}
.top-nav a:hover { color: var(--cream); }
.top-nav .btn {
  color: var(--cream); border: 1px solid var(--line); padding: 9px 16px;
  transition: border-color .2s, color .2s;
}
.top-nav .btn:hover { border-color: var(--bronze); color: var(--bronze); }

/* ---------- shared ---------- */
main > section {
  max-width: var(--max); margin: 0 auto;
  padding: clamp(72px, 10vw, 140px) var(--gutter);
}
main > section.contact { padding-bottom: clamp(56px, 7vw, 96px); }
.section-label, .eyebrow, .domain-tag {
  font-family: var(--f-mono); font-weight: 400; font-size: 12px;
  letter-spacing: .2em; text-transform: uppercase; color: var(--mute);
  margin: 0;
}
.section-label { display: flex; align-items: center; gap: 16px; margin-bottom: 48px; }
.section-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* ---------- hero ---------- */
.hero {
  min-height: calc(100svh - 72px);
  display: grid; grid-template-columns: 1.05fr 1fr; align-items: center;
  gap: clamp(32px, 5vw, 80px);
  padding-top: clamp(32px, 6vw, 72px) !important;
}
.eyebrow { color: var(--bronze); margin-bottom: 28px; }
h1 {
  margin: 0;
  font-weight: 600; font-variation-settings: "wdth" 112;
  font-size: clamp(30px, 3.5vw, 54px); line-height: 1.1; letter-spacing: -.005em;
  max-width: 17em;
  text-wrap: balance;
}
h1 [data-word] { transition: color .35s; }
h1 [data-word].on { color: var(--bronze); }
.lede {
  text-wrap: pretty;
  max-width: 34em; margin: 32px 0 0; color: var(--mute);
  font-size: clamp(16px, 1.25vw, 18px);
}
.readout {
  display: grid; grid-template-columns: auto 1fr; gap: 6px 24px;
  margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--line);
  max-width: 340px;
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em;
}
.readout-k { color: var(--mute); text-transform: uppercase; }
.readout-v { color: var(--cream); }

.hero-ring { position: relative; display: flex; justify-content: center; }
.ring { position: relative; width: min(100%, 620px); height: auto; overflow: visible; }
/* radar sweep behind the ring: visible through the gaps and the core */
.sweep {
  position: absolute; left: 50%; top: 50%;
  width: min(74.8%, 464px); aspect-ratio: 1; transform: translate(-50%, -50%);
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg 290deg, rgb(184 133 63 / .04) 300deg, rgb(184 133 63 / .32) 359deg, transparent 360deg);
  pointer-events: none;
}
.pulse {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--bronze); margin-right: 10px; vertical-align: 1px;
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: .25; } }
.ticks line { stroke: var(--line); stroke-width: 1.2; }
.ticks line.major { stroke: var(--mute); }
.orbit { fill: none; stroke: var(--line); stroke-width: 1; stroke-dasharray: 2 6; }
.seg { cursor: crosshair; outline: none; }
.seg path {
  fill: var(--cream);
  transition: fill .35s, transform .45s cubic-bezier(.2,.7,.2,1), opacity .35s;
  transform-box: view-box; transform-origin: 0 0;
}
.seg[data-domain="air"]   path { --dx: 0;  --dy: -1; }
.seg[data-domain="cyber"] path { --dx: 1;  --dy: 0; }
.seg[data-domain="sea"]   path { --dx: 0;  --dy: 1; }
.seg[data-domain="land"]  path { --dx: -1; --dy: 0; }
.ring .seg.on path {
  opacity: 1; fill: var(--bronze);
  transform: translate(calc(var(--dx) * 16px), calc(var(--dy) * 16px));
}
.seg:focus-visible path { stroke: var(--bronze); stroke-width: 2; }
.labels text {
  font-family: var(--f-mono); font-size: 13px; letter-spacing: .2em;
  fill: var(--mute); text-anchor: middle; transition: fill .35s;
}
.labels text.on { fill: var(--bronze); }
.labels .l-right { text-anchor: start; }
.labels .l-left { text-anchor: end; }
.core line { stroke: var(--mute); stroke-width: 1; }

/* load sequence */
.js .seg path { opacity: 0; }
.js .ring.ready .seg path { opacity: 1; }
@media (prefers-reduced-motion: reduce) { .pulse { animation: none; } .sweep { opacity: .5; } }

/* ---------- domains ---------- */
.domain-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.domain {
  padding: 32px 28px 36px 0; margin-right: 28px;
  border-right: 1px solid var(--line);
  position: relative;
}
.domain:last-child { border-right: 0; margin-right: 0; }
.domain::before {
  content: ""; position: absolute; left: 0; top: -1px; height: 2px; width: 0;
  background: var(--bronze); transition: width .5s cubic-bezier(.2,.7,.2,1);
}
.domain.on::before { width: calc(100% - 28px); }
.domain:last-child.on::before { width: 100%; }
.domain-tag { transition: color .3s; }
.domain.on .domain-tag { color: var(--bronze); }
.domain h3 {
  margin: 18px 0 12px; font-weight: 600; font-variation-settings: "wdth" 120;
  font-size: clamp(30px, 3vw, 44px); line-height: 1; letter-spacing: .01em;
  transition: color .3s;
}
.domain.on h3 { color: var(--bronze); }
.domain p:last-child { margin: 0; color: var(--mute); font-size: 16px; }

/* ---------- presence ---------- */
.presence-body { display: grid; gap: 40px; }
.plot { width: 100%; height: auto; display: block; }
.grid line { stroke: var(--line); stroke-width: 1; }
.grid text { font-family: var(--f-mono); font-size: 11px; fill: #4C535A; letter-spacing: .1em; }
.route { fill: none; stroke: var(--bronze); stroke-width: 1; stroke-dasharray: 3 5; opacity: .7; }
.pins circle.dot { fill: var(--cream); }
.pins circle.halo { fill: none; stroke: var(--bronze); stroke-width: 1; }
.pins text.pin-time {
  font-family: var(--f-mono); font-variation-settings: normal; font-weight: 400;
  font-size: 13px; letter-spacing: .12em; fill: var(--mute);
}
.pins text {
  font-family: var(--f-display); font-variation-settings: "wdth" 112; font-weight: 600;
  font-size: 17px; letter-spacing: .16em; fill: var(--cream);
}
.cities {
  display: none !important;
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.cities li { padding: 24px 0 0; display: grid; gap: 4px; }
.city {
  font-weight: 600; font-variation-settings: "wdth" 116;
  font-size: clamp(22px, 2.4vw, 34px); letter-spacing: .01em;
}
.clock { font-family: var(--f-mono); font-size: 12px; letter-spacing: .12em; color: var(--mute); }

/* ---------- contact ---------- */
.contact-line {
  margin: 0 0 48px; max-width: 18em;
  font-weight: 600; font-variation-settings: "wdth" 116;
  font-size: clamp(28px, 3.6vw, 52px); line-height: 1.05;
}
.channels {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr);
}
.channels li { padding: 0 24px 0 0; display: grid; gap: 10px; min-width: 0; }
.channel-k { font-family: var(--f-mono); font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--mute); }
.channel-v {
  justify-self: start;
  font-size: clamp(17px, 1.6vw, 22px); text-decoration: none;
  background: linear-gradient(var(--bronze), var(--bronze)) 0 100% / 0 1px no-repeat;
  padding-bottom: 4px; transition: background-size .4s, color .3s;
  overflow-wrap: anywhere;
}
.channel-v:hover, .channel-v:focus-visible { color: var(--bronze); background-size: 100% 1px; }
.channels.single { grid-template-columns: 1fr; }
.channels.single li { padding: 0; gap: 16px; }
.channels.single .channel-v { font-size: clamp(18px, 2.8vw, 36px); }
.channel-k .state {
  font-style: normal; margin-left: 10px; padding-left: 10px; border-left: 1px solid var(--line);
  color: #4C535A; transition: color .3s;
}
.channel-k .state.state-open, li.decoded .channel-k .state { color: var(--bronze); }
.cipher { font-family: var(--f-mono); letter-spacing: .02em; white-space: pre; }
.cipher.encoded { color: var(--mute); }
.chat .arrow { display: inline-block; transition: transform .3s; }
.chat:hover .arrow, .chat:focus-visible .arrow { transform: translateX(6px); }

/* ---------- footer ---------- */
.foot {
  max-width: var(--max); margin: 0 auto;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 0 var(--gutter) 36px;
  font-family: var(--f-mono); font-size: 12px; letter-spacing: .14em; color: var(--mute);
  text-transform: uppercase;
}

/* ---------- reveal on scroll ---------- */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .8s, transform .8s cubic-bezier(.2,.7,.2,1); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-ring { order: -1; }
  .ring { width: min(84vw, 440px); }
  .domain-grid { grid-template-columns: 1fr 1fr; }
  .domain { margin-right: 0; padding-right: 24px; }
  .domain:nth-child(2n) { border-right: 0; padding-left: 24px; padding-right: 0; }
  .domain:nth-child(n+3) { border-top: 1px solid var(--line); }
  .domain.on::before, .domain:last-child.on::before { width: 100%; }
  .cities { grid-template-columns: 1fr 1fr; row-gap: 28px; }
}
@media (max-width: 600px) {
  .top-nav a:not(.btn) { display: none; }
  .brand-name { font-size: 13px; letter-spacing: .18em; }
  .mark { width: 28px; }
  .domain-grid { grid-template-columns: 1fr; }
  .domain, .domain:nth-child(2n) { border-right: 0; padding: 28px 0; }
  .domain + .domain { border-top: 1px solid var(--line); }
  .plot { display: none; }
  .cities { display: grid !important; border-top: 0; }
  .cities li { padding-top: 0; }
  .labels text { font-size: 22px; }
  .lede br { display: none; }
  .channels { grid-template-columns: 1fr; }
  .channels li { padding: 20px 0; }
  .channels li + li { border-top: 1px solid var(--line); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}