/* ==========================================================================
   arustamov.dev :: the simple version
   Black, white and one orange. Written mobile first; the desktop layout is
   its own composition below, not a stretched phone.
   ========================================================================== */

@view-transition { navigation: auto; }

:root {
  --ink: #0b0b0c;
  --ink-2: #26241f;
  --soft: #5c5751;
  --faint: #8c867e;
  --paper: #ffffff;
  --paper-2: #f4f1ec;
  --line: #e5dfd6;

  --void: #0b0b0c;
  --void-2: #131315;
  --on-void: #ffffff;
  --soft-v: #aaa49d;
  --faint-v: #6f6a64;
  --line-v: rgba(255, 255, 255, 0.12);

  --orange: #ff5a00;
  --orange-hi: #ff7a2e;
  --orange-text: #c23b00;
  --orange-wash: #fff0e6;

  --sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --gutter: 20px;
  --max: 1360px;
  --band: 88px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-io: cubic-bezier(0.7, 0, 0.2, 1);

  --t-name: clamp(3.4rem, 15vw, 5rem);
  --t-h2: clamp(2.2rem, 9vw, 3.2rem);
  --t-lede: 1.12rem;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 90px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
/* fine grain over everything, so flat colour never looks like a template */
body::after {
  content: "";
  position: fixed; inset: -50%;
  z-index: 200; pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(4) infinite;
}
@keyframes grain {
  0% { transform: translate(0, 0); }
  25% { transform: translate(-3%, 2%); }
  50% { transform: translate(2%, -3%); }
  75% { transform: translate(-2%, -1%); }
  100% { transform: translate(0, 0); }
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
::selection { background: var(--orange); color: #000; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.skip {
  position: absolute; left: 12px; top: -60px; z-index: 300;
  background: var(--orange); color: #000; padding: 10px 14px; border-radius: 8px; font-weight: 700;
}
.skip:focus { top: 12px; }

/* ------------------------------------------------------------- buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 50px; padding: 0 24px; border-radius: 999px;
  font-size: 0.95rem; font-weight: 700; letter-spacing: -0.005em;
  text-decoration: none; white-space: nowrap; cursor: pointer;
  border: 1px solid transparent; background: none;
  transition: transform 0.35s var(--ease), background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.35s;
}
.btn:hover { transform: translateY(-2px); }
.btn-pri { background: var(--orange); color: #000; }
.btn-pri:hover { background: var(--orange-hi); box-shadow: 0 14px 40px -12px rgba(255, 90, 0, 0.7); }
.btn-ghost { border-color: rgba(255, 255, 255, 0.24); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.06); }
.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { background: #000; box-shadow: 0 14px 40px -14px rgba(0, 0, 0, 0.5); }

/* arrow link used across the site */
.go {
  display: inline-flex; align-items: center; gap: 12px;
  font-weight: 700; font-size: 0.95rem; text-decoration: none;
  color: var(--ink);
}
.go span { background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size 0.4s var(--ease); padding-bottom: 2px; }
.go:hover span { background-size: 100% 1px; }
.go i {
  position: relative; width: 34px; height: 34px; border-radius: 50%;
  background: var(--orange); flex: none;
  transition: transform 0.4s var(--ease);
}
.go i::before {
  content: ""; position: absolute; left: 50%; top: 50%; width: 9px; height: 9px;
  border-top: 2px solid #000; border-right: 2px solid #000;
  transform: translate(-65%, -50%) rotate(45deg);
}
.go:hover i { transform: translateX(4px); }
.go-light { color: #fff; }

/* ------------------------------------------------------------- masthead --- */
.mast {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  color: #fff;
  transition: transform 0.5s var(--ease-io), color 0.4s;
}
.mast::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(11, 11, 12, 0.55);
  backdrop-filter: blur(16px) saturate(1.3); -webkit-backdrop-filter: blur(16px) saturate(1.3);
  opacity: 0; transition: opacity 0.4s, background-color 0.4s;
}
.mast[data-scrolled="true"]::before { opacity: 1; }
.mast[data-theme="paper"] { color: var(--ink); }
.mast[data-theme="paper"]::before { background: rgba(255, 255, 255, 0.8); box-shadow: 0 1px 0 var(--line); }
.mast[data-tucked="true"] { transform: translateY(-110%); }
.mast-in { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 20px; }

.mark { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.mark b {
  display: block; width: 38px; height: 38px; border-radius: 11px; flex: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), 0 6px 18px -8px rgba(255, 90, 0, 0.55);
  transition: transform 0.5s var(--ease);
}
.mark b svg { display: block; width: 100%; height: 100%; border-radius: inherit; }
.mark:hover b { transform: rotate(-8deg) scale(1.05); }
.mark span { font-weight: 700; font-size: 1rem; letter-spacing: -0.02em; }

.nav { display: none; }
.mast-r { display: flex; align-items: center; gap: 12px; }
.mode { display: none; }

.menu {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  height: 42px; padding: 0 40px 0 18px; border-radius: 999px;
  border: 1px solid currentColor; background: none; cursor: pointer;
  font-size: 0.86rem; font-weight: 700;
}
.menu i { position: absolute; right: 16px; width: 14px; height: 2px; background: currentColor; transition: transform 0.4s var(--ease); }
.menu i:first-of-type { top: calc(50% - 4px); }
.menu i + i { top: calc(50% + 2px); }
.menu[aria-expanded="true"] i:first-of-type { transform: translateY(3px) rotate(45deg); }
.menu[aria-expanded="true"] i + i { transform: translateY(-3px) rotate(-45deg); }

/* phone menu: a full screen sheet */
@media (max-width: 999px) {
  .nav {
    position: fixed; inset: 0; z-index: -1;
    display: flex; flex-direction: column; justify-content: center; gap: 4px;
    padding: 90px var(--gutter) 40px;
    background: var(--void); color: #fff;
    clip-path: inset(0 0 100% 0); visibility: hidden;
    transition: clip-path 0.7s var(--ease-io), visibility 0s linear 0.7s;
  }
  .nav[data-open="true"] { clip-path: inset(0 0 0 0); visibility: visible; transition-delay: 0s; }
  .nav a {
    font-size: 2.6rem; font-weight: 800; letter-spacing: -0.04em; line-height: 1.15;
    text-decoration: none;
    opacity: 0; transform: translateY(20px);
    transition: opacity 0.5s var(--ease), transform 0.6s var(--ease);
  }
  .nav[data-open="true"] a { opacity: 1; transform: none; }
  .nav[data-open="true"] a:nth-child(2) { transition-delay: 0.05s; }
  .nav[data-open="true"] a:nth-child(3) { transition-delay: 0.1s; }
  .nav[data-open="true"] a:nth-child(4) { transition-delay: 0.15s; }
  .nav[data-open="true"] a:nth-child(5) { transition-delay: 0.2s; }
  .nav[data-open="true"] a:nth-child(6) { transition-delay: 0.25s; }
  .nav a[aria-current] { color: var(--orange); }
  .nav .nav-cv { margin-top: 24px; font-size: 1rem; font-weight: 700; color: var(--orange); }
  html.menu-open { overflow: hidden; }
  html.menu-open .mast { color: #fff; transform: none; }
  html.menu-open .mast::before { opacity: 0; }
}

/* ----------------------------------------------------------------- hero --- */
.hero {
  position: relative; isolation: isolate; overflow: hidden;
  min-height: 100svh;
  background: var(--void); color: #fff;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 0 0 28px;
}
.hero-glow { position: absolute; inset: 0; z-index: -2; pointer-events: none; }
.hero-glow i { position: absolute; border-radius: 50%; filter: blur(80px); will-change: transform; }
.hero-glow i:nth-child(1) {
  width: 90vw; height: 90vw; left: 5vw; top: -10vw;
  background: radial-gradient(circle, rgba(255, 90, 0, 0.55), rgba(255, 90, 0, 0) 65%);
  animation: drift-a 16s var(--ease) infinite alternate;
}
.hero-glow i:nth-child(2) {
  width: 70vw; height: 70vw; right: -30vw; top: 20vh;
  background: radial-gradient(circle, rgba(255, 160, 80, 0.32), rgba(255, 160, 80, 0) 65%);
  animation: drift-b 21s var(--ease) infinite alternate;
}
.hero-glow i:nth-child(3) {
  width: 60vw; height: 60vw; left: -25vw; bottom: -20vw;
  background: radial-gradient(circle, rgba(140, 45, 0, 0.6), rgba(140, 45, 0, 0) 65%);
  animation: drift-c 25s var(--ease) infinite alternate;
}
@keyframes drift-a { to { transform: translate3d(-12vw, 8vh, 0) scale(1.15); } }
@keyframes drift-b { to { transform: translate3d(-18vw, -12vh, 0) scale(0.85); } }
@keyframes drift-c { to { transform: translate3d(20vw, -10vh, 0) scale(1.25); } }

/* the 3D planet fills the hero; the scene places the planet itself */
.planet {
  position: absolute; inset: 0; z-index: -1;
  opacity: 0; transition: opacity 1.6s var(--ease);
}
.planet[data-ready="true"] { opacity: 1; }
.planet canvas { width: 100% !important; height: 100% !important; touch-action: pan-y; }
.planet[data-grab="true"] canvas { cursor: grab; }
.planet[data-grabbing="true"] canvas { cursor: grabbing; }

.hero-in { position: relative; pointer-events: none; padding-top: 53svh; }
.hero-in a, .hero-in button { pointer-events: auto; }
.hero-kicker {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.82rem; letter-spacing: 0.02em; color: var(--soft-v);
}
.hero-kicker .dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--orange); flex: none;
  animation: ping 2.4s infinite;
}
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(255, 90, 0, 0.6); } 70% { box-shadow: 0 0 0 10px rgba(255, 90, 0, 0); } 100% { box-shadow: 0 0 0 0 rgba(255, 90, 0, 0); } }
.hero-name {
  margin: 14px 0 18px;
  font-size: var(--t-name); font-weight: 800; line-height: 0.92; letter-spacing: -0.055em;
}
.hero-name span { display: block; }
.hero-name span:last-child { color: transparent; -webkit-text-stroke: 1.5px #fff; }
.hero-lede { max-width: 34ch; font-size: var(--t-lede); line-height: 1.5; color: #e7e3de; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.planet-hint {
  position: absolute; top: 46svh; left: 0; right: 0; text-align: center;
  font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint-v);
  opacity: 0; transition: opacity 1s 1.2s;
}
.planet[data-ready="true"] ~ .hero-in .planet-hint { opacity: 1; }
.planet-hint .click { display: none; }

.hero-figures {
  display: grid; grid-template-columns: 1fr; gap: 0; margin-top: 40px;
  border-top: 1px solid var(--line-v);
}
.hero-figures li {
  display: flex; align-items: baseline; gap: 14px;
  padding: 14px 0; border-bottom: 1px solid var(--line-v);
}
.hero-figures b {
  font-weight: 800; font-size: 2rem; letter-spacing: -0.04em; line-height: 1;
  color: var(--orange); min-width: 2.6ch; font-variant-numeric: tabular-nums;
}
.hero-figures span { font-size: 0.9rem; color: var(--soft-v); line-height: 1.35; }

/* entrance, pure CSS so it never waits on a script */
.hero [style*="--d"] {
  animation: rise 1.1s var(--ease) both;
  animation-delay: calc(0.25s + var(--d) * 0.12s);
}
.hero-name span { animation: rise 1.2s var(--ease) both; }
.hero-name span:first-child { animation-delay: 0.4s; }
.hero-name span:last-child { animation-delay: 0.52s; }
@keyframes rise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }

/* ------------------------------------------------------------- marquee --- */
.marquee {
  overflow: hidden; background: var(--orange); color: #000; padding: 16px 0;
}
.marquee-in { display: flex; width: max-content; animation: marquee 38s linear infinite; }
.marquee span {
  display: inline-flex; align-items: center; gap: 28px; padding-right: 28px;
  font-weight: 800; font-size: 1.25rem; letter-spacing: -0.02em; white-space: nowrap;
}
.marquee span::after { content: ""; width: 9px; height: 9px; background: #000; border-radius: 50%; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------------------------------------------------------------- bands --- */
.band { position: relative; padding: var(--band) 0; }
.band-sunk { background: var(--paper-2); }
.band-void { background: var(--void); color: #fff; overflow: hidden; isolation: isolate; }

/* moving light behind every dark band */
.field { position: absolute; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.field i { position: absolute; border-radius: 50%; filter: blur(90px); will-change: transform; }
.field i:nth-child(1) {
  width: 70vmax; height: 70vmax; right: -25vmax; top: -30vmax;
  background: radial-gradient(circle, rgba(255, 90, 0, 0.42), rgba(255, 90, 0, 0) 62%);
  animation: field-a 18s var(--ease) infinite alternate;
}
.field i:nth-child(2) {
  width: 55vmax; height: 55vmax; left: -22vmax; bottom: -25vmax;
  background: radial-gradient(circle, rgba(255, 140, 60, 0.26), rgba(255, 140, 60, 0) 62%);
  animation: field-b 23s var(--ease) infinite alternate;
}
.field i:nth-child(3) {
  width: 40vmax; height: 40vmax; left: 35%; top: 30%;
  background: radial-gradient(circle, rgba(255, 60, 0, 0.18), rgba(255, 60, 0, 0) 62%);
  animation: field-c 29s var(--ease) infinite alternate;
}
@keyframes field-a { to { transform: translate3d(-20vmax, 18vmax, 0) scale(1.2); } }
@keyframes field-b { to { transform: translate3d(24vmax, -14vmax, 0) scale(0.9); } }
@keyframes field-c { to { transform: translate3d(-18vmax, -10vmax, 0) scale(1.35); } }

/* --------------------------------------------------------- section head --- */
.sec-head { display: grid; gap: 18px; margin-bottom: 44px; }
.sec-label {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--orange-text);
}
.band-void .sec-label, .phead .sec-label { color: var(--orange); }
.sec-num {
  display: inline-grid; place-items: center; height: 26px; padding: 0 9px;
  border-radius: 999px; border: 1px solid currentColor;
  font-size: 0.72rem; letter-spacing: 0.04em;
}
.sec-title {
  margin-top: 14px;
  font-size: var(--t-h2); font-weight: 800; line-height: 0.98; letter-spacing: -0.045em;
  text-wrap: balance;
}
.sec-intro { font-size: 1.05rem; line-height: 1.6; color: var(--soft); max-width: 52ch; }
.band-void .sec-intro { color: var(--soft-v); }

/* word by word rise for big titles */
.js [data-split] .w { display: inline-block; vertical-align: top; }
.js [data-split] .w > span {
  display: inline-block; opacity: 0; transform: translateY(0.5em) rotate(2deg);
  transition: opacity 0.7s var(--ease), transform 0.9s var(--ease);
  transition-delay: calc(var(--i) * 0.045s);
}
.js [data-split].in .w > span { opacity: 1; transform: none; }

/* scroll reveal */
.js [data-reveal] {
  opacity: 0; transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 1s var(--ease);
  transition-delay: var(--rd, 0s);
}
.js [data-reveal].in { opacity: 1; transform: none; }
.reveal-all [data-reveal], .reveal-all [data-split] .w > span { opacity: 1 !important; transform: none !important; }

/* ------------------------------------------------------------- projects --- */
.projs { border-top: 2px solid var(--ink); }
.proj {
  position: relative;
  display: grid; grid-template-columns: 1fr; gap: 14px;
  padding: 30px 0 32px; border-bottom: 1px solid var(--line);
}
.proj::before {
  content: ""; position: absolute; left: 0; top: -1px; height: 2px; width: 100%;
  background: var(--orange); transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 0.8s var(--ease-io);
}
.proj:hover::before { transform: scaleX(1); }
.proj-n { font-size: 0.85rem; font-weight: 700; color: var(--orange-text); font-variant-numeric: tabular-nums; }
.proj-kind { font-size: 0.82rem; font-weight: 600; color: var(--faint); letter-spacing: 0.01em; margin-bottom: 8px; }
.proj h3 {
  font-size: 1.75rem; font-weight: 800; line-height: 1.05; letter-spacing: -0.035em;
  margin-bottom: 12px; text-wrap: balance;
}
.proj-sum { color: var(--ink-2); max-width: 60ch; }

.facts-row { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 18px; }
.facts-row div { display: flex; align-items: baseline; gap: 10px; }
.facts-row dt { font-weight: 800; font-size: 1.35rem; letter-spacing: -0.03em; color: var(--orange-text); }
.facts-row dd { font-size: 0.9rem; color: var(--soft); }

.parts { margin-top: 18px; }
.parts summary {
  display: inline-flex; align-items: center; gap: 12px; cursor: pointer; list-style: none;
  font-size: 0.9rem; font-weight: 700; padding: 8px 0;
}
.parts summary::-webkit-details-marker { display: none; }
.parts summary i {
  position: relative; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--ink);
  transition: background 0.3s, color 0.3s;
}
.parts summary i::before, .parts summary i::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 10px; height: 1.5px;
  background: currentColor; transform: translate(-50%, -50%);
}
.parts summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform 0.4s var(--ease); }
.parts[open] summary i { background: var(--ink); color: #fff; }
.parts[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.parts ol { counter-reset: p; display: grid; margin-top: 8px; }
.parts li {
  counter-increment: p; display: grid; grid-template-columns: 34px 1fr; gap: 6px;
  padding: 10px 0; border-top: 1px solid var(--line); font-size: 0.97rem;
  animation: rise 0.6s var(--ease) both;
}
.parts li::before { content: counter(p, decimal-leading-zero); font-size: 0.78rem; color: var(--orange-text); padding-top: 3px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips li {
  padding: 5px 11px; border-radius: 999px; border: 1px solid var(--line);
  font-size: 0.78rem; font-weight: 600; color: var(--soft); background: var(--paper);
}
.band-void .chips li, .phead .chips li { border-color: var(--line-v); color: var(--soft-v); background: transparent; }
.proj-side { display: flex; flex-direction: column; gap: 18px; align-items: flex-start; }

/* -------------------------------------------------------- the feature --- */
.feature {
  position: relative;
  border: 1px solid var(--line-v); border-radius: 24px;
  padding: 28px 22px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.01));
}
.feature::after {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  padding: 1px;
  background: conic-gradient(from var(--a, 0deg), transparent 0 70%, rgba(255, 90, 0, 0.95) 82%, transparent 92%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: spin-border 6s linear infinite;
}
@property --a { syntax: "<angle>"; initial-value: 0deg; inherits: false; }
@keyframes spin-border { to { --a: 360deg; } }
.feature-kind {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px;
  font-size: 0.82rem; color: var(--soft-v); margin-bottom: 14px;
}
.live {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px; border-radius: 999px; background: rgba(57, 211, 123, 0.13);
  color: #74e8a6; font-weight: 700; font-size: 0.75rem; letter-spacing: 0.02em;
}
.live i { width: 7px; height: 7px; border-radius: 50%; background: #39d37b; animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: 0.3; } }
.feature h3 {
  font-size: clamp(2.3rem, 10vw, 4rem); font-weight: 800; line-height: 0.95; letter-spacing: -0.05em;
  margin-bottom: 18px;
}
.feature-sum { font-family: var(--serif); font-size: 1.22rem; line-height: 1.5; color: #ece8e3; max-width: 46ch; }
.ticks { display: grid; margin: 24px 0; border-top: 1px solid var(--line-v); }
.ticks li {
  display: flex; gap: 12px; align-items: center;
  padding: 12px 0; border-bottom: 1px solid var(--line-v); font-size: 0.96rem; color: #e2ddd7;
}
.ticks li::before {
  content: ""; width: 18px; height: 18px; flex: none; border-radius: 50%;
  background: var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.feature-foot { display: flex; flex-direction: column; gap: 22px; }
.feature-act { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; }

.also { margin-top: 56px; }
.also-note { color: var(--soft-v); max-width: 60ch; margin-bottom: 18px; font-size: 0.98rem; }

.smalls { border-top: 1px solid var(--line); }
.smalls li {
  display: grid; grid-template-columns: 1fr; gap: 6px;
  padding: 18px 0; border-bottom: 1px solid var(--line);
}
.sm-meta { display: flex; gap: 10px; font-size: 0.8rem; color: var(--faint); }
.sm-meta b { font-weight: 600; color: var(--orange-text); }
.sm-main b { display: block; font-size: 1.2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 4px; }
.sm-main span { color: var(--soft); font-size: 0.97rem; }
.smalls-dark { border-color: var(--line-v); }
.smalls-dark li { border-color: var(--line-v); }
.smalls-dark .sm-meta { color: var(--faint-v); }
.smalls-dark .sm-meta b { color: var(--orange); }
.smalls-dark .sm-main span { color: var(--soft-v); }

/* ------------------------------------------------------------- services --- */
.svcs { display: grid; grid-template-columns: 1fr; gap: 14px; }
.svc {
  position: relative; overflow: hidden;
  padding: 26px 22px 24px; border-radius: 20px;
  background: var(--paper-2); border: 1px solid var(--line);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease), background-color 0.4s;
}
.svc::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--orange);
  transform: scaleX(0); transform-origin: 0 50%; transition: transform 0.6s var(--ease-io);
}
.svc:hover { transform: translateY(-4px); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.25); background: #fff; }
.svc:hover::before { transform: scaleX(1); }
.svc-n { font-size: 0.8rem; font-weight: 700; color: var(--orange-text); }
.svc h3 { font-size: 1.4rem; font-weight: 800; line-height: 1.1; letter-spacing: -0.03em; margin: 14px 0 10px; }
.svc > p { color: var(--soft); font-size: 0.98rem; }
.svc ul { margin: 16px 0; display: grid; gap: 7px; }
.svc li { display: flex; gap: 10px; font-size: 0.93rem; }
.svc li::before { content: ""; width: 6px; height: 6px; margin-top: 0.62em; background: var(--orange); flex: none; }
.svc-proof { font-size: 0.85rem; color: var(--faint); padding-top: 14px; border-top: 1px solid var(--line); }
.svc-proof b { color: var(--ink); margin-right: 6px; }
.svc-cta {
  display: flex; flex-direction: column; gap: 18px; align-items: flex-start;
  margin-top: 36px; padding: 28px 22px; border-radius: 20px;
  background: var(--orange-wash); border: 1px solid #ffd7bf;
}
.svc-cta p { font-size: 1.15rem; font-weight: 600; letter-spacing: -0.01em; max-width: 48ch; }

/* -------------------------------------------------------------- writing --- */
.posts { border-top: 2px solid var(--ink); }
.post-row {
  display: grid; grid-template-columns: 1fr; gap: 6px;
  padding: 24px 0; border-bottom: 1px solid var(--line); text-decoration: none;
  transition: padding 0.5s var(--ease);
}
.post-row time, .post-read { font-size: 0.82rem; color: var(--faint); }
.post-main b { display: block; font-size: 1.35rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 6px; transition: color 0.3s; }
.post-main span { color: var(--soft); font-size: 0.97rem; }
.post-row:hover .post-main b { color: var(--orange-text); }

/* -------------------------------------------------------------- contact --- */
.contact { padding: 110px 0; }
.contact .sec-label { color: var(--orange); }
.mega {
  margin: 18px 0 22px;
  font-size: clamp(2.6rem, 11vw, 4rem); font-weight: 800; line-height: 0.95; letter-spacing: -0.05em;
  max-width: 14ch; text-wrap: balance;
}
.contact-lede { color: var(--soft-v); max-width: 54ch; }
.big-mail {
  display: inline-block; margin: 30px 0 26px;
  font-size: clamp(1.2rem, 6vw, 2rem); font-weight: 700; letter-spacing: -0.03em;
  text-decoration: none; overflow-wrap: anywhere;
  background: linear-gradient(var(--orange), var(--orange)) 0 100% / 100% 2px no-repeat;
  padding-bottom: 4px; transition: color 0.3s;
}
.big-mail:hover { color: var(--orange); }
.contact .row { display: flex; flex-wrap: wrap; gap: 10px; }
[data-copy][data-done="true"] { border-color: var(--orange); color: var(--orange); }

/* --------------------------------------------------------------- footer --- */
.foot { background: #000; color: #fff; padding: 64px 0 110px; }
.foot-top { display: grid; gap: 16px; padding-bottom: 36px; border-bottom: 1px solid var(--line-v); }
.foot-top p { color: var(--soft-v); max-width: 40ch; }
.foot-grid { display: grid; grid-template-columns: 1fr; gap: 30px; padding: 36px 0; }
.foot h2 { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint-v); margin-bottom: 12px; }
.foot li { padding: 4px 0; }
.foot a { text-decoration: none; color: #ddd8d2; transition: color 0.2s; }
.foot li a:hover { color: var(--orange); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 24px; border-top: 1px solid var(--line-v); font-size: 0.82rem; color: var(--faint-v); }

/* ---------------------------------------------------------- mobile bar --- */
.mbar {
  position: fixed; left: 12px; right: 12px; bottom: calc(12px + env(safe-area-inset-bottom)); z-index: 90;
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 6px;
  border-radius: 999px; background: rgba(11, 11, 12, 0.86);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 18px 40px -16px rgba(0, 0, 0, 0.6);
  transition: transform 0.5s var(--ease), opacity 0.4s;
}
.mbar a {
  display: grid; place-items: center; height: 46px; border-radius: 999px;
  font-weight: 700; font-size: 0.92rem; text-decoration: none; color: #fff;
}
.mbar a:first-child { background: var(--orange); color: #000; }
.mbar[data-hidden="true"] { transform: translateY(140%); opacity: 0; pointer-events: none; }

/* ------------------------------------------------------- page headers --- */
.phead {
  position: relative; isolation: isolate; overflow: hidden;
  background: var(--void); color: #fff;
  padding: 130px 0 60px;
}
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: 0.82rem; color: var(--faint-v); margin-bottom: 26px; }
.crumbs a { text-decoration: none; color: var(--soft-v); }
.crumbs a:hover { color: #fff; }
.phead-title {
  margin: 16px 0 20px;
  font-size: clamp(2.4rem, 10vw, 3.6rem); font-weight: 800; line-height: 0.96; letter-spacing: -0.05em;
  max-width: 18ch; text-wrap: balance;
  animation: rise 1s var(--ease) 0.15s both;
}
.phead-lede { font-size: var(--t-lede); line-height: 1.55; color: #e2ddd7; max-width: 60ch; animation: rise 1s var(--ease) 0.28s both; }
.phead-lede a { color: var(--orange); }
.phead .sec-label { animation: rise 0.9s var(--ease) both; }
.facts-head { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 34px 0 22px; background: var(--line-v); border: 1px solid var(--line-v); border-radius: 16px; overflow: hidden; }
.facts-head div { background: var(--void-2); padding: 18px; }
.facts-head dt { font-weight: 800; font-size: 1.6rem; letter-spacing: -0.03em; color: var(--orange); }
.facts-head dd { font-size: 0.86rem; color: var(--soft-v); }
.facts-head div:last-child:nth-child(odd) { grid-column: span 2; }
.post-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; margin-top: 26px; font-size: 0.85rem; color: var(--soft-v); }
.post-meta span:nth-child(n + 3) { padding: 2px 10px; border: 1px solid var(--line-v); border-radius: 999px; }

/* ------------------------------------------------------------- articles --- */
.art { display: grid; grid-template-columns: 1fr; gap: 40px; padding-top: 56px; padding-bottom: 80px; }
.toc { display: none; }
.prose { max-width: 68ch; min-width: 0; font-size: 1.08rem; line-height: 1.72; overflow-wrap: break-word; }
.art > * { min-width: 0; }
.prose > * + * { margin-top: 1.15em; }
.prose h2 {
  margin-top: 2.2em; font-size: 1.75rem; font-weight: 800; line-height: 1.1; letter-spacing: -0.03em;
  scroll-margin-top: 90px;
}
.prose h3 { margin-top: 1.8em; font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose li::marker { color: var(--orange-text); }
.prose a { color: var(--orange-text); text-underline-offset: 3px; }
.prose blockquote { border-left: 3px solid var(--orange); padding-left: 1.1em; font-family: var(--serif); font-size: 1.3rem; line-height: 1.45; }
.prose pre { background: var(--void); color: #eee; padding: 18px; border-radius: 12px; overflow-x: auto; font: 0.88rem/1.6 var(--mono); }
.prose code { font-family: var(--mono); font-size: 0.9em; }
.callout { background: var(--orange-wash); border: 1px solid #ffd7bf; border-radius: 14px; padding: 18px 20px; font-size: 0.98rem; }
.plist { list-style: none !important; padding: 0 !important; counter-reset: p; border-top: 1px solid var(--line); }
.plist li { counter-increment: p; display: grid; grid-template-columns: 34px 1fr; padding: 10px 0; border-bottom: 1px solid var(--line); margin: 0 !important; }
.plist li::before { content: counter(p, decimal-leading-zero); color: var(--orange-text); font-size: 0.8rem; padding-top: 4px; }

.next { border-top: 1px solid var(--line); }
.next a { display: grid; gap: 8px; padding: 46px 0; text-decoration: none; }
.next span { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--orange-text); }
.next b { font-size: clamp(1.8rem, 7vw, 3.4rem); font-weight: 800; line-height: 1; letter-spacing: -0.045em; transition: color 0.3s; }
.next a:hover b { color: var(--orange-text); }
.next i { display: none; }

/* about */
.about-side { display: grid; gap: 18px; align-content: start; }
.about-facts { display: grid; border-top: 2px solid var(--ink); }
.about-facts div { padding: 12px 0; border-bottom: 1px solid var(--line); }
.about-facts dt { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); }
.about-facts dd { font-size: 0.98rem; }
.about-side h2 { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin-top: 8px; }
.langs li { padding: 3px 0; }
.caps { display: grid; grid-template-columns: 1fr; border-top: 2px solid var(--ink); }
.cap { padding: 22px 0; border-bottom: 1px solid var(--line); }
.cap h3 { font-size: 1.2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 6px; }
.cap p { color: var(--soft); font-size: 0.97rem; }
.method { display: grid; grid-template-columns: 1fr; gap: 14px; }
.mpoint { padding: 24px 22px; border-radius: 18px; background: var(--paper); border: 1px solid var(--line); }
.mpoint h3 { font-size: 1.2rem; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 8px; }
.mpoint p { color: var(--soft); font-size: 0.97rem; }

/* contact page */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 40px; }
.ways { border-top: 2px solid var(--ink); }
.way { display: grid; gap: 4px; padding: 20px 0; border-bottom: 1px solid var(--line); text-decoration: none; transition: padding 0.4s var(--ease); }
.way span { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); }
.way b { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.03em; overflow-wrap: anywhere; transition: color 0.3s; }
.way:hover b { color: var(--orange-text); }
.contact-note { font-family: var(--serif); font-size: 1.25rem; line-height: 1.5; margin-bottom: 26px; }
.contact-side h2 { font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--faint); margin-bottom: 10px; }
.svc-links li { border-bottom: 1px solid var(--line); }
.svc-links a { display: block; padding: 10px 0; text-decoration: none; font-weight: 600; }
.svc-links a:hover { color: var(--orange-text); }
.contact-meta { margin-top: 20px; color: var(--faint); font-size: 0.9rem; }

/* reading progress */
.progress { position: fixed; left: 0; top: 0; height: 3px; width: 100%; z-index: 150; background: var(--orange); transform: scaleX(0); transform-origin: 0 50%; }

/* page transition: a slide left or right between pages */
::view-transition-old(root) { animation: 0.45s var(--ease-io) both vt-out; }
::view-transition-new(root) { animation: 0.6s var(--ease) both vt-in; }
@keyframes vt-out { to { opacity: 0; transform: translateX(-4%); } }
@keyframes vt-in { from { opacity: 0; transform: translateX(4%); } }

/* =========================================================================
   tablet
   ========================================================================= */
@media (min-width: 700px) {
  :root { --gutter: 36px; --band: 110px; }
  .svcs { grid-template-columns: 1fr 1fr; }
  .method { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-figures { grid-template-columns: repeat(3, 1fr); gap: 24px; border-top: 0; }
  .hero-figures li { flex-direction: column; gap: 8px; border-top: 1px solid var(--line-v); border-bottom: 0; padding-top: 16px; }
  .smalls li { grid-template-columns: 200px 1fr; gap: 24px; }
  .sm-meta { flex-direction: column; gap: 2px; }
  .post-row { grid-template-columns: 150px 1fr 80px; gap: 24px; align-items: baseline; }
  .post-read { text-align: right; }
  .caps { grid-template-columns: 1fr 1fr; column-gap: 40px; }
  .feature { padding: 44px 40px; }
  /* as many equal columns as there are facts, so one or two never leave an empty strip */
  .facts-head { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); }
  .facts-head div:last-child:nth-child(odd) { grid-column: auto; }
}

/* =========================================================================
   desktop: its own composition
   ========================================================================= */
@media (min-width: 1000px) {
  :root {
    --gutter: 56px; --band: 150px;
    --t-name: clamp(5rem, 9.4vw, 10rem);
    --t-h2: clamp(3.4rem, 5.6vw, 5.8rem);
    --t-lede: 1.32rem;
  }

  .nav { display: flex; align-items: center; gap: 2px; }
  .nav a {
    position: relative; padding: 8px 14px; border-radius: 999px;
    font-size: 0.9rem; font-weight: 600; text-decoration: none;
    transition: background-color 0.3s;
  }
  .nav a:hover { background: rgba(127, 127, 127, 0.16); }
  .nav a[aria-current]::after {
    content: ""; position: absolute; left: 50%; bottom: 1px; width: 5px; height: 5px; border-radius: 50%;
    background: var(--orange); transform: translateX(-50%);
  }
  .nav .nav-cv { display: none; }
  .menu { display: none; }
  .mast-in { height: 78px; }

  /* the version switch, top right, the same place as in drive mode */
  .mode { display: flex; padding: 4px; gap: 2px; border-radius: 999px; border: 1px solid rgba(127, 127, 127, 0.35); }
  .mode span, .mode a { padding: 7px 16px; border-radius: 999px; font-size: 0.8rem; font-weight: 700; text-decoration: none; }
  .mode [aria-current] { background: var(--orange); color: #000; }
  .mode a { opacity: 0.75; transition: opacity 0.2s, background-color 0.2s; }
  .mode a:hover { opacity: 1; background: rgba(127, 127, 127, 0.16); }

  /* hero: copy on the left, the planet owns the right half */
  .hero { padding-bottom: 44px; justify-content: center; }
  .hero-in { padding-top: 130px; min-height: calc(100svh - 170px); display: flex; align-items: center; }
  .hero-copy { max-width: 700px; }
  .hero-name { margin: 22px 0 28px; }
  .hero-lede { max-width: 38ch; }
  .hero-cta { margin-top: 36px; gap: 12px; }
  .btn { min-height: 56px; padding: 0 30px; font-size: 1rem; }
  .planet-hint { top: auto; bottom: 12px; left: auto; right: var(--gutter); text-align: right; }
  .planet-hint .click { display: inline; }
  .hero-figures b { font-size: 2.8rem; }
  .hero-glow i:nth-child(1) { width: 60vw; height: 60vw; left: 42vw; top: -6vw; }

  .marquee { padding: 22px 0; }
  .marquee span { font-size: 1.6rem; gap: 36px; padding-right: 36px; }

  .sec-head { grid-template-columns: 1.25fr 1fr; align-items: end; gap: 60px; margin-bottom: 72px; }
  .sec-intro { font-size: 1.12rem; justify-self: end; }

  .proj { grid-template-columns: 90px minmax(0, 1fr) 300px; gap: 40px; padding: 48px 0 50px; }
  .proj h3 { font-size: 2.6rem; }
  .proj-n { font-size: 1rem; padding-top: 30px; }
  .proj-sum { font-size: 1.1rem; }
  .proj-side { padding-top: 34px; }
  .parts ol { grid-template-columns: 1fr 1fr; column-gap: 32px; }

  .feature { padding: 64px 64px 56px; display: grid; grid-template-columns: 1.15fr 1fr; gap: 0 64px; }
  .feature-kind, .feature h3, .feature-sum { grid-column: 1; }
  .feature h3 { font-size: 5.4rem; }
  .ticks { grid-column: 2; grid-row: 1 / span 3; align-self: center; margin: 0; }
  .feature-foot { grid-column: 1 / -1; flex-direction: row; justify-content: space-between; align-items: center; margin-top: 40px; }

  .also { margin-top: 90px; }
  .also-note { margin-bottom: 26px; }

  .svcs { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .svc { padding: 34px 30px 28px; }
  .svc-cta { flex-direction: row; justify-content: space-between; align-items: center; padding: 34px 40px; }

  .smalls li { grid-template-columns: 260px 1fr; padding: 24px 0; }
  .sm-main b { font-size: 1.5rem; }

  .post-row { grid-template-columns: 200px 1fr 90px; padding: 32px 0; }
  .post-row:hover { padding-left: 14px; }
  .post-main b { font-size: 1.8rem; }

  .contact { padding: 180px 0 160px; }
  .mega { font-size: clamp(4rem, 7.4vw, 8rem); max-width: 13ch; }
  .big-mail { font-size: 2.6rem; }

  .foot-top { grid-template-columns: 1fr 1fr; align-items: center; }
  .mark-lg b { width: 56px; height: 56px; font-size: 1.3rem; border-radius: 16px; }
  .mark-lg span { font-size: 1.4rem; }
  .foot { padding-bottom: 50px; }
  .mbar { display: none; }

  .phead { padding: 190px 0 90px; }
  .phead-title { font-size: clamp(3.6rem, 6.4vw, 6.6rem); }
  .art { grid-template-columns: 250px minmax(0, 1fr); gap: 80px; padding-top: 90px; padding-bottom: 120px; }
  .toc { display: block; position: sticky; top: 110px; align-self: start; }
  .toc p { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--faint); margin-bottom: 12px; }
  .toc ol { border-left: 1px solid var(--line); }
  .toc a { display: block; padding: 7px 0 7px 16px; margin-left: -1px; border-left: 2px solid transparent; font-size: 0.9rem; text-decoration: none; color: var(--soft); transition: color 0.2s, border-color 0.2s; }
  .toc a:hover, .toc a[data-active="true"] { color: var(--ink); border-color: var(--orange); }
  .art > .prose:only-child { grid-column: 2; }
  .prose { font-size: 1.15rem; }
  .prose h2 { font-size: 2.1rem; }
  .next a { padding: 80px 0; }

  .caps { grid-template-columns: repeat(3, 1fr); }
  .method { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: 1.2fr 1fr; gap: 100px; }
  .way b { font-size: 2rem; }
  .way:hover { padding-left: 12px; }
}

@media (min-width: 1500px) { :root { --gutter: 72px; } }

/* ------------------------------------------------------- reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .js [data-reveal], .js [data-split] .w > span { opacity: 1; transform: none; }
}

/* ------------------------------------------------------ service icons --- */
.svc-top { display: flex; align-items: center; justify-content: space-between; }
.svc-ic {
  width: 46px; height: 46px; fill: none; stroke: var(--ink); stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
  transition: stroke 0.4s, transform 0.6s var(--ease);
}
.svc-ic * { stroke-dasharray: 160; stroke-dashoffset: 160; transition: stroke-dashoffset 1.4s var(--ease) 0.25s; }
.svc.in .svc-ic *, .reveal-all .svc-ic *, html:not(.js) .svc-ic * { stroke-dashoffset: 0; }
.svc:hover .svc-ic { stroke: var(--orange-text); transform: rotate(-6deg) scale(1.08); }
.svc-ic-voice .bar { transform-box: fill-box; transform-origin: 50% 50%; animation: voice 1.1s var(--ease) infinite alternate; }
.svc-ic-voice .bar:nth-child(2) { animation-delay: 0.15s; }
.svc-ic-voice .bar:nth-child(3) { animation-delay: 0.3s; }
.svc-ic-voice .bar:nth-child(4) { animation-delay: 0.45s; }
.svc-ic-voice .bar:nth-child(5) { animation-delay: 0.6s; }
.svc-ic-voice .bar:nth-child(6) { animation-delay: 0.75s; }
@keyframes voice { from { transform: scaleY(0.45); } to { transform: scaleY(1); } }
.hero-updated { margin-top: 14px; font-size: 0.78rem; color: var(--faint-v); }

/* ===================================================== working demos === */
.demo-wrap { margin: 2.6em 0 2.4em; max-width: none; }
.prose .demo-wrap { width: min(1180px, calc(100vw - 2 * var(--gutter))); }
.demo {
  display: none; /* desktop only */
  border-radius: 18px; overflow: hidden; background: #0b0b0c;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(0, 0, 0, 0.08);
}
.demo-bar {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: #0b0b0c; color: #fff; font-size: 13px; font-weight: 600;
}
.demo-dots { display: flex; gap: 6px; }
.demo-dots i { width: 11px; height: 11px; border-radius: 50%; background: #3a3a3e; }
.demo-dots i:first-child { background: var(--orange); }
.demo-title { font-weight: 800; letter-spacing: -0.01em; }
.demo-tag { padding: 3px 10px; border-radius: 999px; background: rgba(255, 90, 0, 0.16); color: #ffb48a; font-size: 11px; font-weight: 700; letter-spacing: 0.04em; }
.demo-sp { flex: 1; }
.demo-bar button {
  font: inherit; font-size: 12px; color: #fff; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.22); background: none; border-radius: 999px; padding: 6px 12px;
}
.demo-bar button:hover { border-color: #fff; }
.demo-frame { position: relative; background: #fff; }
.demo-frame iframe { display: block; width: 100%; height: 100%; border: 0; }
.demo-cover {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: var(--paper-2); color: var(--faint); font-weight: 700; transition: opacity 0.5s;
}
.demo-cover[data-gone="true"] { opacity: 0; pointer-events: none; }
.demo-mobile { font-size: 0.95rem; color: var(--soft); margin: 0 0 6px; }
.guide-h { font-size: 0.78rem !important; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--orange-text); margin: 34px 0 18px !important; }

@media (min-width: 1000px) {
  .demo { display: block; }
  .demo-mobile { display: none; }
}
@media (min-width: 1000px) {
  /* the article column sits right of the table of contents; let the demo use the full width */
  .art .prose .demo-wrap { margin-left: calc(-250px - 80px); width: calc(100% + 250px + 80px); }
}

/* ---------------------------------------------------------------- guide --- */
.guide {
  list-style: none !important; padding: 0 !important; margin: 0 !important;
  position: relative; display: grid; gap: 0;
}
.guide::before {
  content: ""; position: absolute; left: 27px; top: 20px; bottom: 20px; width: 2px;
  background: linear-gradient(var(--orange), var(--orange)) 0 0 / 100% var(--fill, 0%) no-repeat, var(--line);
  transition: background-size 1.6s var(--ease);
}
.guide.go::before { --fill: 100%; }
.g-step { position: relative; display: grid; grid-template-columns: 56px 1fr; column-gap: 18px; padding: 10px 0 22px; margin: 0 !important; }
.g-ic {
  grid-row: span 3; position: relative; z-index: 1;
  width: 56px; height: 56px; border-radius: 16px; display: grid; place-items: center;
  background: var(--paper); border: 1.5px solid var(--ink);
  transition: background 0.5s, border-color 0.5s, transform 0.6s var(--ease);
}
.g-step.in .g-ic { background: var(--ink); border-color: var(--ink); }
.g-ic svg { width: 30px; height: 30px; fill: none; stroke: var(--ink); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; transition: stroke 0.5s; }
.g-step.in .g-ic svg { stroke: #fff; }
.g-ic svg * { stroke-dasharray: 140; stroke-dashoffset: 140; transition: stroke-dashoffset 1.3s var(--ease) 0.2s; }
.g-step.in .g-ic svg * { stroke-dashoffset: 0; }
.g-step:hover .g-ic { transform: translateY(-3px) rotate(-4deg); }
.g-n { font-size: 0.75rem; font-weight: 700; color: var(--orange-text); letter-spacing: 0.06em; padding-top: 4px; }
.g-step b { font-size: 1.15rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.g-t { color: var(--soft); font-size: 0.97rem; font-weight: 400; line-height: 1.5; margin-top: 2px; }
.g-step b { display: block; }

/* the small loops that make each symbol say what it means */
.g-step.in .gi-laser { animation: gi-laser 1.4s ease-in-out 1.4s infinite alternate; stroke: var(--orange) !important; }
@keyframes gi-laser { from { transform: translateY(-9px); } to { transform: translateY(9px); } }
.g-step.in .gi-pop { transform-box: fill-box; transform-origin: center; animation: gi-pop 1.8s ease-in-out 1.4s infinite; }
@keyframes gi-pop { 0%, 60%, 100% { transform: scale(1); } 30% { transform: scale(1.3); } }
.g-step.in .gi-flash { transform-box: fill-box; transform-origin: center; animation: gi-flash 2s ease-in-out 1.4s infinite; stroke: var(--orange) !important; }
@keyframes gi-flash { 0%, 100% { opacity: 0.25; transform: scale(0.7) rotate(0); } 50% { opacity: 1; transform: scale(1.1) rotate(20deg); } }
.g-step.in .gi-fly { animation: gi-fly 2.2s ease-in-out 1.4s infinite; }
@keyframes gi-fly { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(3px, -3px); } }
.g-step.in .gi-blink { animation: gi-blink 1.2s steps(2) 1.4s infinite; stroke: var(--orange) !important; }
@keyframes gi-blink { 50% { opacity: 0; } }
.g-step.in .gi-tick { stroke: var(--orange) !important; stroke-dasharray: 40; animation: gi-tick 2.4s ease 1.6s infinite; }
@keyframes gi-tick { 0% { stroke-dashoffset: 40; } 40%, 100% { stroke-dashoffset: 0; } }
.g-step.in .gi-slide { animation: gi-slide 2.4s cubic-bezier(0.7, 0, 0.2, 1) 1.4s infinite; fill: var(--orange); stroke: var(--orange) !important; }
@keyframes gi-slide { 0%, 15% { transform: translateX(0); } 55%, 80% { transform: translateX(22px); } 100% { transform: translateX(0); } }
.g-step.in .gi-slide2 { animation: gi-slide2 2s ease-in-out 1.4s infinite; }
@keyframes gi-slide2 { 50% { transform: translateX(-3px); } }
.g-step.in .gi-spin { transform-box: fill-box; transform-origin: center; animation: gi-spin 3s linear 1.4s infinite; }
@keyframes gi-spin { to { transform: rotate(360deg); } }
.g-step.in .gi-pulse { animation: gi-pulse 1.6s ease-in-out 1.4s infinite; }
@keyframes gi-pulse { 50% { stroke: var(--orange); filter: drop-shadow(0 0 4px rgba(255, 90, 0, 0.8)); } }
.g-step.in .gi-drive { animation: gi-drive 2.6s ease-in-out 1.4s infinite; }
@keyframes gi-drive { 0%, 100% { transform: translateX(-2px); } 50% { transform: translateX(3px); } }
.g-step.in .gi-hand { transform-box: view-box; transform-origin: 24px 24px; animation: gi-spin 2.4s linear 1.4s infinite; stroke: var(--orange) !important; }
.g-step.in .gi-dot { animation: gi-dot 1.2s ease-in-out 1.4s infinite; fill: #fff; }
.g-step.in .gi-d2 { animation-delay: 1.55s; }
.g-step.in .gi-d3 { animation-delay: 1.7s; }
@keyframes gi-dot { 50% { transform: translateY(-3px); fill: var(--orange); } }
.g-step.in .gi-wave { animation: gi-blink 1.4s steps(2) 1.4s infinite; stroke: var(--orange) !important; }

@media (min-width: 1000px) {
  /* a horizontal track on desktop */
  .guide { grid-template-columns: repeat(var(--n), 1fr); gap: 0 22px; }
  .guide::before {
    left: 28px; right: 28px; top: 28px; bottom: auto; width: auto; height: 2px;
    background: linear-gradient(var(--orange), var(--orange)) 0 0 / var(--fill, 0%) 100% no-repeat, var(--line);
  }
  .g-step { grid-template-columns: 1fr; padding: 0; }
  .g-ic { grid-row: auto; margin-bottom: 16px; }
}
@media (prefers-reduced-motion: reduce) { .guide::before { transition: none; } }
.desk, .desk-inline { display: none !important; }
@media (min-width: 1000px) { .desk { display: inline-flex !important; } .desk-inline { display: inline-flex !important; } }
@media (min-width: 1000px) {
  /* the demo spans the contents column, so it has to sit above the sticky contents list */
  .art .prose .demo-wrap { position: relative; z-index: 4; background: var(--paper); padding: 8px 0 14px; box-shadow: 0 0 0 24px var(--paper); }
}

/* ============================================================ schemas === */
.dg { margin: 0; }
.dg-cap { display: grid; gap: 4px; margin-bottom: 18px; font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.dg-cap span { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--orange-text); }
.dg-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; padding: 4px 0 8px; scrollbar-width: thin; }
.dg-svg { display: block; width: 100%; height: auto; min-width: 760px; }
.dg-compact .dg-svg { min-width: 0; }
.dg-compact .dg-l { font-size: 12px; }
.dg-compact .dg-s { font-size: 10.5px; }
.dg-compact { margin: 14px 0 2px; }
.dg-note { font-size: 0.92rem; color: var(--soft); margin: 10px 0 0 !important; max-width: 70ch; }
.dg-node rect { fill: #fff; stroke: var(--ink); stroke-width: 1.5; }
.dg-store rect { fill: var(--paper-2); }
.dg-ask rect { fill: var(--orange-wash); stroke: var(--orange); stroke-dasharray: 5 4; }
.dg-end rect { fill: var(--ink); }
.dg-ic { fill: none; stroke: var(--ink); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; overflow: visible; }
.dg-ask .dg-ic { stroke: var(--orange-text); }
.dg-end .dg-ic { stroke: var(--orange); }
.dg-l { font: 700 13px var(--sans); fill: var(--ink); }
.dg-s { font: 400 11px var(--sans); fill: var(--soft); }
.dg-end .dg-l { fill: #fff; }
.dg-end .dg-s { fill: #bdb8b1; }
.dg-base { fill: none; stroke: #d3ccc2; stroke-width: 2; }
.dg-head { fill: #b9b1a6; }
.dg-flow { fill: none; stroke: var(--orange); stroke-width: 2; stroke-dasharray: 6 12; animation: dg-flow 1.1s linear infinite; }
.dg-e-no .dg-base { stroke-dasharray: 5 5; }
.dg-e-no .dg-flow { stroke: #9a948d; }
.dg-dot { fill: var(--orange); }
.dg-e-no .dg-dot { fill: #9a948d; }
.dg-el { font: 700 10.5px var(--sans); fill: var(--orange-text); paint-order: stroke; stroke: var(--paper); stroke-width: 5px; stroke-linejoin: round; }
@keyframes dg-flow { to { stroke-dashoffset: -36; } }

/* the parts arrive one after another as the schema scrolls in */
.js .dg .dg-node { opacity: 0; transform: translateY(12px); transform-box: fill-box; transition: opacity 0.6s var(--ease), transform 0.8s var(--ease); transition-delay: calc(var(--i) * 0.11s + 0.1s); }
.js .dg .dg-edge { opacity: 0; transition: opacity 0.7s var(--ease); transition-delay: calc(var(--i) * 0.11s + 0.45s); }
.js .dg.in .dg-node, .js .dg.in .dg-edge, .reveal-all .dg .dg-node, .reveal-all .dg .dg-edge { opacity: 1; transform: none; }

/* on dark bands */
.band-void .dg-node rect { fill: #161618; stroke: rgba(255, 255, 255, 0.28); }
.band-void .dg-store rect { fill: #1f1f22; }
.band-void .dg-ask rect { fill: rgba(255, 90, 0, 0.12); stroke: var(--orange); }
.band-void .dg-end rect { fill: var(--orange); stroke: var(--orange); }
.band-void .dg-ic { stroke: #fff; }
.band-void .dg-ask .dg-ic { stroke: var(--orange); }
.band-void .dg-end .dg-ic { stroke: #000; }
.band-void .dg-l { fill: #fff; }
.band-void .dg-s { fill: var(--soft-v); }
.band-void .dg-end .dg-l { fill: #000; }
.band-void .dg-end .dg-s { fill: rgba(0, 0, 0, 0.7); }
.band-void .dg-base { stroke: rgba(255, 255, 255, 0.18); }
.band-void .dg-head { fill: rgba(255, 255, 255, 0.35); }
.band-void .dg-el { stroke: var(--void); }
.smalls li > .dg { grid-column: 1 / -1; margin-top: 6px; }

/* compact chains: one row when there is room, two rows, then three on a phone */
.dg-compact { container-type: inline-size; }
.dg-v { display: none; }
.dg-v2 { display: block; }
@container (min-width: 440px) { .dg-v2 { display: none; } .dg-v3 { display: block; } }
@container (min-width: 880px) { .dg-v3 { display: none; } .dg-v1 { display: block; } }

/* full diagrams become a readable list on a phone */
.dg-list { display: none; list-style: none; margin: 0; padding: 0; }
.dg-list li { position: relative; display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: 14px; padding-bottom: 18px; }
.dg-list li::before { content: ""; position: absolute; left: 19px; top: 44px; bottom: 4px; width: 2px; background: var(--line); }
.dg-list li:last-child::before { display: none; }
.dgl-ic { width: 40px; height: 40px; padding: 8px; box-sizing: border-box; border: 1.5px solid var(--ink); border-radius: 12px; background: #fff;
  fill: none; stroke: var(--ink); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.dgl-store .dgl-ic { background: var(--paper-2); }
.dgl-ask .dgl-ic { border-style: dashed; border-color: var(--orange); background: var(--orange-wash); stroke: var(--orange-text); }
.dgl-end .dgl-ic { background: var(--ink); border-color: var(--ink); stroke: var(--orange); }
.dgl-t { display: grid; gap: 2px; padding-top: 1px; min-width: 0; }
.dgl-t b { font-size: 1rem; font-weight: 800; letter-spacing: -0.01em; }
.dgl-t span { font-size: 0.88rem; color: var(--soft); }
.dgl-t .dgl-way { color: var(--orange-text); }
.dgl-way b { font-size: inherit; font-weight: 800; }
@media (max-width: 699px) {
  .dg:not(.dg-compact) .dg-scroll { display: none; }
  .dg-list { display: block; }
}

@media (prefers-reduced-motion: reduce) { .dg-dot { display: none; } .dg-flow { animation: none; } }
@media (min-width: 1000px) {
  .dg-svg { min-width: 0; }
  .dg-compact .dg-svg { max-width: 920px; }
}

.smalls li > * { min-width: 0; }
.sm-main { display: block; min-width: 0; }
.also > * { min-width: 0; }

/* drive mode is desktop only */
.desk-li { display: none; }
@media (min-width: 1000px) and (hover: hover) and (pointer: fine) { .desk-li { display: list-item; } }
/* touch screens, even wide ones, only get the simple version */
@media (hover: none), (pointer: coarse) { .mode { display: none !important; } }
.phead-lede + .chips { margin-top: 22px; }
/* the smallest phones: keep the name on one line, the menu button becomes an icon */
@media (max-width: 359px) {
  .mark span { white-space: nowrap; font-size: 0.95rem; }
  .menu-l { display: none; }
}