:root {
  --paper: #f4f0e8;
  --paper-2: #ebe5d8;
  --ink: #16140f;
  --ink-2: #5d574b;
  --ink-3: #9a9282;
  --line: #d8cfbd;
  --grid: rgba(22, 20, 15, .045);
  --signal: #ff4d12;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --pad: clamp(20px, 5vw, 64px);
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12110e; --paper-2: #1b1915; --ink: #efe9dc; --ink-2: #aaa293;
    --ink-3: #6f685b; --line: #2e2b24; --grid: rgba(239, 233, 220, .04); --signal: #ff6a33;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0; color: var(--ink); background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  font: 400 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--signal); color: var(--paper); }
a { color: inherit; }
.mono { font-family: var(--mono); font-size: .78rem; letter-spacing: .02em; }
em { font-style: italic; }

/* ---------- top bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 24px;
  padding: 14px var(--pad);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: blur(10px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.mark { display: flex; align-items: center; gap: 8px; font: 500 15px var(--mono); text-decoration: none; }
.mark-sub { color: var(--ink-3); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 4px color-mix(in srgb, var(--signal) 20%, transparent); }
.bar nav { display: flex; gap: 4px; margin-left: auto; }
.bar nav a {
  font: 500 .86rem var(--sans); text-decoration: none; color: var(--ink-2);
  padding: 6px 12px; border-radius: 999px; transition: background .2s, color .2s;
}
.bar nav a:hover { color: var(--ink); background: var(--paper-2); }
.bar nav .nav-cta { color: var(--paper); background: var(--ink); }
.bar nav .nav-cta:hover { background: var(--signal); color: var(--paper); }
.clock { color: var(--ink-3); white-space: nowrap; }

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(32px, 5vw, 80px);
  align-items: center; padding: clamp(48px, 9vh, 110px) var(--pad) clamp(56px, 10vh, 120px);
  max-width: 1360px; margin: 0 auto;
}
.kicker { color: var(--signal); text-transform: uppercase; letter-spacing: .14em; margin: 0 0 22px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; letter-spacing: -.01em; }
h1 { font-size: clamp(2.8rem, 6.4vw, 5.6rem); line-height: .98; }
h1 em { color: var(--signal); }
.lede { font-size: clamp(1.05rem, 1.4vw, 1.22rem); color: var(--ink-2); max-width: 54ch; margin: 28px 0 32px; }
.lede a { color: var(--ink); text-decoration-color: var(--signal); text-underline-offset: 3px; text-decoration-thickness: 1.5px; }
.lede a:hover { color: var(--signal); }
.hero-links { display: flex; gap: 10px; flex-wrap: wrap; }
.pill {
  font: 500 .9rem var(--sans); text-decoration: none; padding: 10px 18px;
  border: 1px solid var(--ink); border-radius: 999px; transition: all .2s;
}
.pill:hover { background: var(--ink); color: var(--paper); }
.pill.solid { background: var(--signal); border-color: var(--signal); color: #fff; }
.pill.solid:hover { background: var(--ink); border-color: var(--ink); }

.diagram {
  margin: 0; border: 1px solid var(--ink); background: var(--paper);
  box-shadow: 8px 8px 0 var(--ink);
}
.fig-head {
  display: flex; justify-content: space-between; padding: 8px 12px;
  border-bottom: 1px solid var(--ink); text-transform: uppercase; letter-spacing: .1em;
}
#sat { display: block; width: 100%; aspect-ratio: 1 / .82; cursor: crosshair; touch-action: pan-y; }
.telemetry {
  display: grid; grid-template-columns: repeat(3, auto) 1fr; border-top: 1px solid var(--ink);
}
.telemetry > div { padding: 8px 12px; border-right: 1px solid var(--line); display: flex; gap: 8px; white-space: nowrap; }
.telemetry > div:last-child { border-right: 0; }
.telemetry span { color: var(--ink-3); }
.telemetry b { font-weight: 500; }
#t-mode.track { color: var(--signal); }
.diagram figcaption { padding: 10px 12px; border-top: 1px solid var(--ink); color: var(--ink-2); line-height: 1.5; }

/* ---------- blocks ---------- */
.block { padding: clamp(64px, 10vh, 120px) var(--pad); max-width: 1360px; margin: 0 auto; border-top: 1px solid var(--line); }
.block-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 40px; }
.block-head .mono { color: var(--signal); }
h2 { font-size: clamp(2.4rem, 5vw, 4rem); line-height: 1; }
.block-intro { color: var(--ink-2); margin: -20px 0 48px; font-size: 1.1rem; }

.now { display: grid; grid-template-columns: 1.6fr 1fr; gap: clamp(32px, 6vw, 96px); align-items: start; }
.big { font-family: var(--serif); font-size: clamp(1.6rem, 2.8vw, 2.4rem); line-height: 1.2; margin: 0; }
.big em { color: var(--signal); }
.facts { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.facts li { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: .85rem; }
.facts span { color: var(--ink-3); text-transform: uppercase; letter-spacing: .08em; }

/* trajectory */
.legs { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); position: relative; }
.legs::before {
  content: ""; position: absolute; left: 0; right: 0; top: 7px; height: 0;
  border-top: 1.5px dashed var(--ink-3);
}
.leg { position: relative; padding-right: clamp(20px, 3vw, 48px); }
.node { height: 16px; margin-bottom: 26px; }
.node span { display: block; width: 16px; height: 16px; border-radius: 50%; background: var(--paper); border: 1.5px solid var(--ink); }
.leg.current .node span { background: var(--signal); border-color: var(--signal); animation: ping 2.2s infinite; }
@keyframes ping {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--signal) 50%, transparent); }
  100% { box-shadow: 0 0 0 16px transparent; }
}
.coords { color: var(--ink-3); margin: 0 0 6px; }
.leg h3 { font-size: clamp(2rem, 3vw, 2.7rem); line-height: 1.05; }
.role { color: var(--signal); margin: 8px 0 16px; }
.leg p:not(.coords):not(.role) { color: var(--ink-2); margin: 0 0 12px; font-size: .98rem; }
.leg em { color: var(--ink); }

/* side quest */
.block.dark { max-width: none; background: var(--ink); color: var(--paper); border-top: 0; }
.block.dark > * { max-width: 1232px; margin-left: auto; margin-right: auto; }
.block.dark .block-head { margin-bottom: 32px; }
.quest {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center;
  text-decoration: none; border: 1px solid color-mix(in srgb, var(--paper) 22%, transparent);
  padding: clamp(28px, 4vw, 56px); transition: border-color .25s;
}
.quest:hover { border-color: var(--signal); }
.status { display: flex; align-items: center; gap: 8px; color: color-mix(in srgb, var(--paper) 60%, transparent); margin: 0 0 18px; }
.live { width: 8px; height: 8px; border-radius: 50%; background: #3ddc84; box-shadow: 0 0 10px #3ddc84; }
.quest h3 { font-size: clamp(3rem, 7vw, 6rem); line-height: .9; }
.tagline { font-family: var(--serif); font-size: clamp(1.5rem, 2.4vw, 2.1rem); color: var(--signal); margin: 10px 0 20px; }
.quest-copy > p:not(.status):not(.tagline) { color: color-mix(in srgb, var(--paper) 72%, transparent); max-width: 46ch; }
.go { display: inline-block; margin-top: 18px; padding: 10px 16px; border: 1px solid var(--paper); transition: all .2s; }
.quest:hover .go { background: var(--signal); border-color: var(--signal); color: #fff; }

.printer { width: 100%; max-width: 380px; justify-self: center; overflow: visible; }
.printer .bed { stroke: var(--paper); stroke-width: 2; }
.printer .ghost { fill: none; stroke: color-mix(in srgb, var(--paper) 30%, transparent); stroke-dasharray: 3 4; }
.printer .carriage { fill: var(--paper); }
.printer .nozzle { fill: var(--signal); }
.grow { animation: grow 9s steps(29) infinite; }
.head-y { animation: headY 9s steps(29) infinite; }
.head-x { animation: headX .62s ease-in-out infinite alternate; }
@keyframes grow { 0% { transform: translateY(205px); } 85%, 100% { transform: translateY(60px); } }
@keyframes headY { 0% { transform: translate(120px, 205px); } 85%, 100% { transform: translate(120px, 60px); } }
@keyframes headX { from { transform: translateX(-36px); } to { transform: translateX(36px); } }

/* built rows */
.rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--ink); }
.rows a {
  display: grid; grid-template-columns: 56px 1.1fr 1.4fr 120px; align-items: baseline; gap: 16px;
  padding: 22px 8px; border-bottom: 1px solid var(--line); text-decoration: none;
  transition: background .2s, padding .25s;
}
.rows a:hover { background: var(--paper-2); padding-left: 20px; }
.rows .n { color: var(--ink-3); }
.rows .t { font-family: var(--serif); font-size: clamp(1.4rem, 2.2vw, 1.9rem); line-height: 1.1; }
.rows .d { color: var(--ink-2); font-size: .95rem; }
.rows .k { color: var(--ink-3); text-align: right; text-transform: uppercase; letter-spacing: .08em; }
.rows a:hover .k, .rows a:hover .t { color: var(--signal); }

/* papers */
.refs { list-style: none; margin: 0 0 28px; padding: 0; }
.refs li { display: grid; grid-template-columns: 56px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.refs .idx { color: var(--signal); padding-top: 6px; }
.refs a { font-family: var(--serif); font-size: clamp(1.3rem, 2vw, 1.65rem); line-height: 1.2; text-decoration: none; }
.refs a:hover { color: var(--signal); }
.refs p { margin: 6px 0 0; color: var(--ink-3); }
.scholar { color: var(--ink-2); text-decoration-color: var(--signal); text-underline-offset: 4px; }

/* hello */
.hello-line { font-size: 1.15rem; color: var(--ink-2); margin: 0 0 18px; }
.email-row { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.email {
  font-family: var(--serif); font-size: clamp(2.4rem, 7.5vw, 6.5rem); line-height: 1;
  text-decoration: none; background: linear-gradient(var(--signal), var(--signal)) 0 100% / 0 6px no-repeat;
  transition: background-size .45s ease;
}
.email:hover { background-size: 100% 6px; }
.copy {
  cursor: pointer; padding: 10px 16px; background: transparent; color: var(--ink);
  border: 1px solid var(--ink); border-radius: 999px; transition: all .2s;
}
.copy:hover, .copy.done { background: var(--ink); color: var(--paper); }
.elsewhere { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 40px; font-size: .85rem; }
.elsewhere a { text-decoration: none; color: var(--ink-2); }
.elsewhere a:hover { color: var(--signal); }

.foot {
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 28px var(--pad); border-top: 1px solid var(--line); color: var(--ink-3);
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero, .now, .quest { grid-template-columns: 1fr; }
  .legs { grid-template-columns: 1fr; gap: 40px; padding-left: 36px; }
  .legs::before { top: 0; bottom: 0; height: auto; left: 7px; right: auto; border-top: 0; border-left: 1.5px dashed var(--ink-3); }
  .node { position: absolute; left: -36px; top: 4px; margin: 0; }
  .rows a { grid-template-columns: 40px 1fr; }
  .rows .d { grid-column: 2; }
  .rows .k { display: none; }
  .printer { max-width: 260px; }
}
@media (max-width: 720px) {
  .bar nav a:not(.nav-cta) { display: none; }
  .clock { display: none; }
  .telemetry { grid-template-columns: repeat(3, 1fr); }
  .telemetry .q { grid-column: 1 / -1; border-top: 1px solid var(--line); }
  .diagram { box-shadow: 5px 5px 0 var(--ink); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .grow, .head-y, .head-x, .leg.current .node span { animation: none; }
  .grow { transform: translateY(60px); }
  .head-y { transform: translate(120px, 60px); }
}