/* ==========================================================================
   drashtantnayak.ca — site styles
   Plain CSS, no build step. Tokens first, then base, then components.
   Fonts load from Google Fonts (see <head>); fallbacks are listed below.
   ========================================================================== */

:root {
  color-scheme: light;

  /* Snowpack / spruce / signal red. The red nods to the Canadian flag,
     used sparingly: links, focus, the live dot, the one primary button. */
  --paper: #eef1f4;
  --paper-2: #e3e8ee;
  --ink: #0f1a2b;
  --ink-2: #44536a;
  --rule: #c9d2dd;
  --rule-strong: #aab6c6;
  --signal: #c42a12;
  --signal-fill: #e5381f;
  --on-signal: #ffffff;
  --spruce: #1d6a57;
  --ai: #4655c9;

  --block-bg: #0f1a2b;
  --block-fg: #eef1f4;
  --block-fg-2: #aab8cc;
  --block-rule: #2a3a55;

  --code-bg: #0f1a2b;
  --code-fg: #d9e2ef;
  --code-dim: #7f8ea6;
  --tok-key: #ff8f78;
  --tok-str: #86dcb9;
  --tok-fn: #8ecbff;
  --tok-num: #f2c27e;

  --display: "Bricolage Grotesque", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --text: "Literata", "Iowan Old Style", "Charter", "Bitstream Charter", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --gutter: clamp(20px, 4vw, 48px);
  --max: 1240px;
  --radius: 14px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0b1320;
  --paper-2: #101b2d;
  --ink: #e8edf4;
  --ink-2: #a3b1c5;
  --rule: #223047;
  --rule-strong: #34476a;
  --signal: #ff6a4d;
  --signal-fill: #ff6a4d;
  --on-signal: #14070a;
  --spruce: #5cd6ae;
  --ai: #9eaeff;

  --block-bg: #15233a;
  --block-fg: #eef1f4;
  --block-fg-2: #a3b1c5;
  --block-rule: #2c3f5f;

  --code-bg: #08101c;
}

/* ---------- base ---------- */

*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-size: 1.0625rem;
  line-height: 1.7;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::after {
  /* very light paper grain */
  content: "";
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%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");
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--display);
  font-optical-sizing: auto;
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
h2 { font-size: clamp(2rem, 1.1rem + 3.1vw, 3.5rem); font-stretch: 90%; }
h3 { font-size: 1.3rem; letter-spacing: -0.012em; line-height: 1.2; }
p { margin: 0 0 1.1em; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; }
a { color: inherit; }
img, svg { display: block; max-width: 100%; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
::selection { background: var(--signal-fill); color: var(--on-signal); }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - var(--gutter) * 2, var(--max)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; left: 16px; top: -80px; z-index: 300; padding: 10px 16px;
  border-radius: 8px; background: var(--signal-fill); color: var(--on-signal);
  font-family: var(--display); font-weight: 600; text-decoration: none; transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

.link {
  color: var(--signal);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: text-decoration-thickness 0.15s;
}
.link:hover { text-decoration-thickness: 2px; }

.ui { font-family: var(--display); font-weight: 500; letter-spacing: 0; }
.dim { color: var(--ink-2); }

/* ---------- header ---------- */

.progress {
  position: fixed; inset: 0 auto auto 0; z-index: 120; width: 100%; height: 2px;
  background: var(--signal-fill); transform: scaleX(0); transform-origin: left; pointer-events: none;
}

.site-header {
  position: fixed; inset: 0 0 auto; z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.25s, border-color 0.25s, backdrop-filter 0.25s;
}
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  border-color: var(--rule);
  backdrop-filter: blur(14px) saturate(1.3);
  -webkit-backdrop-filter: blur(14px) saturate(1.3);
}
.nav { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 68px; }
.brand {
  font-family: var(--display); font-weight: 700; font-stretch: 85%;
  font-size: 1.15rem; letter-spacing: -0.02em; text-decoration: none;
}
.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 32px); list-style: none; }
.nav-links a {
  position: relative; font-family: var(--display); font-weight: 500; font-size: 0.94rem;
  color: var(--ink-2); text-decoration: none; padding: 6px 0; transition: color 0.15s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--signal); transform: scaleX(0); transform-origin: left; transition: transform 0.3s var(--ease);
}
.nav-links a:hover, .nav-links a[aria-current] { color: var(--ink); }
.nav-links a:hover::after, .nav-links a[aria-current]::after { transform: scaleX(1); }
.nav-tools { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  display: inline-grid; place-items: center; height: 40px; min-width: 40px; padding: 0 10px; gap: 8px;
  border: 1px solid var(--rule); border-radius: 10px; background: transparent;
  font-family: var(--display); font-size: 0.82rem; font-weight: 500; color: var(--ink-2);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.icon-btn:hover { color: var(--ink); border-color: var(--rule-strong); background: color-mix(in srgb, var(--ink) 5%, transparent); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn kbd { font: inherit; letter-spacing: 0.02em; }
.btn-palette { display: none; grid-auto-flow: column; }
.js .btn-palette { display: inline-grid; }
.theme-sun { display: none; }
:root[data-theme="dark"] .theme-sun { display: block; }
:root[data-theme="dark"] .theme-moon { display: none; }
.menu-toggle { display: none; }

/* ---------- buttons ---------- */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 0 22px; border: 1px solid transparent; border-radius: 12px;
  font-family: var(--display); font-weight: 600; font-size: 1rem; line-height: 1; text-decoration: none;
  transition: background 0.2s, border-color 0.2s, color 0.2s, box-shadow 0.2s;
  will-change: transform;
}
.btn-primary { background: var(--signal-fill); color: var(--on-signal); }
.btn-primary:hover { box-shadow: 0 10px 28px color-mix(in srgb, var(--signal-fill) 38%, transparent); }
.btn-quiet { border-color: var(--rule-strong); color: var(--ink); }
.btn-quiet:hover { border-color: var(--ink); }
.btn svg { width: 18px; height: 18px; }

/* ---------- hero ---------- */

.hero { position: relative; padding: clamp(120px, 15vw, 190px) 0 clamp(64px, 9vw, 120px); overflow: clip; }
/* the landscape lives further down: see "alberta scene" */

.hero-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.7fr); gap: clamp(32px, 5vw, 80px); align-items: end; }
.hero-main { container-type: inline-size; }
.status {
  display: inline-flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; margin: 0 0 clamp(22px, 3vw, 34px);
  font-family: var(--display); font-weight: 500; font-size: 0.92rem; color: var(--ink-2);
}
.status .dot { position: relative; width: 9px; height: 9px; border-radius: 50%; background: var(--spruce); }
.status .dot::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%; border: 1px solid var(--spruce);
  animation: ping 2.4s var(--ease) infinite;
}
@keyframes ping { 0% { transform: scale(0.5); opacity: 0.9; } 100% { transform: scale(1.5); opacity: 0; } }
.clock { color: var(--ink); font-variant-numeric: tabular-nums; }

h1.hero-title { font-weight: 700; line-height: 0.92; letter-spacing: -0.045em; text-wrap: nowrap; }
.hero-name { display: block; font-size: clamp(3.4rem, 19.5cqi, 11.5rem); font-stretch: 86%; font-weight: 640; }
.hero-name .w { display: block; padding-bottom: 0.16em; margin-bottom: -0.16em; overflow: hidden; }
.hero-name .ch {
  display: inline-block; font-weight: var(--wg, 640); font-stretch: var(--wd, 86%);
  transition: font-weight 0.35s var(--ease), font-stretch 0.35s var(--ease);
}
.hero-role {
  display: block; margin-top: clamp(18px, 2.4vw, 30px);
  font-size: clamp(1.25rem, 0.7rem + 2.4cqi, 2.1rem); font-weight: 500; font-stretch: 92%; letter-spacing: -0.02em; line-height: 1.15;
  color: var(--ink-2); text-wrap: balance; white-space: normal;
}
.hero-intro { max-width: 34em; margin: clamp(22px, 3vw, 34px) 0 0; font-size: clamp(1.05rem, 1rem + 0.3vw, 1.2rem); }
.hero-intro + .hero-intro { margin-top: 1em; color: var(--ink-2); font-size: 1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: clamp(26px, 3.4vw, 40px); }

.portrait { position: relative; justify-self: end; width: min(100%, 380px); perspective: 900px; }
.portrait-frame {
  overflow: hidden; border-radius: 22px; aspect-ratio: 4 / 5; background: var(--paper-2);
  box-shadow: 0 1px 0 var(--rule-strong), 0 30px 60px -30px rgb(15 26 43 / 0.45);
  transform: rotateY(calc(var(--px, 0) * 5deg)) rotateX(calc(var(--py, 0) * -4deg));
  transition: transform 0.5s var(--ease);
}
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 18%; }

/* the one orchestrated page-load moment */
.d1 { --d: 1; }
.d2 { --d: 2; }
.d3 { --d: 3; }
.d4 { --d: 4; }
.js .hero-name .ch { transform: translateY(108%); }
.js.is-ready .hero-name .ch { animation: rise 0.9s var(--ease) both; animation-delay: calc(var(--i) * 38ms + 120ms); }
.js .hero-fade, .js .portrait { opacity: 0; }
.js.is-ready .hero-fade { animation: settle 0.9s var(--ease) both; animation-delay: calc(0.55s + var(--d, 0) * 90ms); }
.js.is-ready .portrait { animation: settle 1.1s var(--ease) both; animation-delay: 0.45s; }
@keyframes rise { from { transform: translateY(108%); } to { transform: translateY(0); } }
@keyframes settle { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ---------- sections ---------- */

.band { position: relative; padding: clamp(72px, 9vw, 140px) 0; border-top: 1px solid var(--rule); }
.band-tint { background: var(--paper-2); }
.split { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: clamp(28px, 5vw, 88px); align-items: start; }
.split-head { position: sticky; top: 104px; }
.split-head p { margin: 18px 0 0; color: var(--ink-2); font-size: 1rem; max-width: 26em; }
.split-head + .lead, h2 + .lead { margin-top: 22px; }
.lead { font-size: clamp(1.15rem, 1rem + 0.7vw, 1.4rem); line-height: 1.55; max-width: 36em; }

/* services */
.rows { border-top: 1px solid var(--rule-strong); list-style: none; }
.row {
  position: relative; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 12px clamp(20px, 3vw, 48px);
  padding: 30px 12px; border-bottom: 1px solid var(--rule); isolation: isolate;
}
.row::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity 0.3s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--signal-fill) 11%, transparent), transparent 62%);
}
.row:hover::before { opacity: 1; }
.row h3 { font-size: clamp(1.25rem, 1.05rem + 0.7vw, 1.65rem); transition: transform 0.35s var(--ease); }
.row:hover h3 { transform: translateX(6px); }
.row p { margin: 0; color: var(--ink-2); font-size: 1rem; }
.row p + p { margin-top: 0.8em; font-size: 0.92rem; }
.row p strong { color: var(--ink); font-weight: 600; }

/* request trace (stack diagram) */
.trace-intro { max-width: 40em; margin-top: 20px; color: var(--ink-2); }
.trace { margin-top: clamp(36px, 5vw, 64px); }
.trace-nav { position: relative; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); list-style: none; }
.trace-nav::before { content: ""; position: absolute; top: 9px; left: 10%; right: 10%; height: 2px; background: var(--rule-strong); }
.trace-packet {
  position: absolute; top: 4px; left: 10%; width: 12px; height: 12px; margin-left: -6px; border-radius: 50%;
  background: var(--signal-fill); box-shadow: 0 0 0 5px color-mix(in srgb, var(--signal-fill) 22%, transparent);
  animation: packet 6.5s var(--ease) infinite; pointer-events: none;
}
@keyframes packet { 0% { left: 10%; opacity: 0; } 8% { opacity: 1; } 92% { opacity: 1; } 100% { left: 90%; opacity: 0; } }
.stop {
  position: relative; display: block; width: 100%; padding: 36px 8px 0; border: 0; background: transparent;
  text-align: center; color: var(--ink-2); transition: color 0.2s;
}
.stop::before {
  content: ""; position: absolute; top: 3px; left: 50%; width: 14px; height: 14px; margin-left: -7px;
  border-radius: 50%; background: var(--paper); border: 2px solid var(--rule-strong);
  transition: border-color 0.2s, background 0.2s, transform 0.3s var(--ease);
}
.band-tint .stop::before { background: var(--paper-2); }
.stop strong { display: block; font-family: var(--display); font-weight: 600; font-size: 1.05rem; color: inherit; }
.stop span { display: block; margin-top: 2px; font-family: var(--display); font-size: 0.84rem; font-weight: 500; }
.stop:hover { color: var(--ink); }
.stop[aria-selected="true"] { color: var(--ink); }
.stop[aria-selected="true"]::before { background: var(--signal-fill); border-color: var(--signal-fill); transform: scale(1.35); }
.trace-panels { margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--rule); }
.trace-panel { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: clamp(16px, 4vw, 64px); }
.trace-panel[hidden] { display: none; }
.trace-panel h3 { font-size: clamp(1.5rem, 1.2rem + 1vw, 2.1rem); font-stretch: 92%; }
.trace-panel p { margin: 0; font-size: 1.04rem; }
.trace-panel p + p { margin-top: 0.8em; color: var(--ink-2); font-size: 0.96rem; }

/* AI section + code */
.ai-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 5vw, 88px); align-items: start; }
.plain-list { list-style: none; margin-top: 28px; border-top: 1px solid var(--rule-strong); }
.plain-list li { padding: 16px 0; border-bottom: 1px solid var(--rule); font-size: 1rem; }
.plain-list strong { font-family: var(--display); font-weight: 600; }

.code { margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--code-bg); color: var(--code-fg); position: relative; }
.code figcaption {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 16px;
  border-bottom: 1px solid #ffffff14; font-family: var(--mono); font-size: 0.74rem; color: var(--code-dim);
}
.code pre { margin: 0; padding: 18px 20px 22px; overflow-x: auto; font-family: var(--mono); font-size: 0.8rem; line-height: 1.75; tab-size: 4; -webkit-text-size-adjust: none; }
.code code { font: inherit; }
.code .k { color: var(--tok-key); }
.code .s { color: var(--tok-str); }
.code .f { color: var(--tok-fn); }
.code .n { color: var(--tok-num); }
.code .c { color: var(--code-dim); font-style: italic; }
.copy-btn {
  padding: 3px 10px; border: 1px solid #ffffff26; border-radius: 6px; background: transparent;
  font: 500 0.72rem var(--mono); color: var(--code-fg); transition: background 0.15s, border-color 0.15s;
}
.copy-btn:hover { background: #ffffff14; border-color: #ffffff40; }

/* toolkit */
.toolkit { display: grid; gap: 0; border-top: 1px solid var(--rule-strong); }
.toolkit > div { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: 8px 32px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.toolkit dt { font-family: var(--display); font-weight: 600; font-size: 1.05rem; }
.toolkit dd { margin: 0; color: var(--ink-2); font-size: 1rem; }

/* steps — a real sequence, so numbered */
.steps { position: relative; list-style: none; counter-reset: step; padding-left: 64px; --fill: 0%; }
.steps::before, .steps::after { content: ""; position: absolute; left: 19px; top: 14px; bottom: 14px; width: 2px; background: var(--rule); }
.steps::after { background: var(--signal-fill); bottom: auto; height: var(--fill); max-height: calc(100% - 28px); }
.steps li { position: relative; padding: 0 0 44px; counter-increment: step; }
.steps li:last-child { padding-bottom: 0; }
.steps li::before {
  content: counter(step); position: absolute; left: -64px; top: -4px; display: grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--rule-strong); background: var(--paper);
  font-family: var(--display); font-weight: 600; font-size: 0.95rem; transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.steps li.is-done::before { border-color: var(--signal-fill); background: var(--signal-fill); color: var(--on-signal); }
.steps h3 { margin-bottom: 8px; font-size: 1.4rem; }
.steps p { margin: 0; color: var(--ink-2); max-width: 36em; }

/* notes */
.notes { list-style: none; border-top: 1px solid var(--rule-strong); }
.note { display: grid; grid-template-columns: 150px minmax(0, 1fr) auto; gap: 8px 28px; align-items: baseline; padding: 26px 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.note time, .note .mins { font-family: var(--display); font-size: 0.88rem; font-weight: 500; color: var(--ink-2); }
.note h3 { font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.55rem); transition: color 0.2s; }
.note p { margin: 8px 0 0; color: var(--ink-2); font-size: 0.98rem; max-width: 40em; }
.note:hover h3 { color: var(--signal); }
.note-title { background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size 0.4s var(--ease); }
.note:hover .note-title { background-size: 100% 1px; }

/* about */
.about-body { max-width: 38em; }
.about-body p { font-size: 1.06rem; }
.facts { margin: 36px 0 0; display: grid; gap: 0; border-top: 1px solid var(--rule-strong); }
.facts > div { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); gap: 6px 24px; padding: 16px 0; border-bottom: 1px solid var(--rule); }
.facts dt { font-family: var(--display); font-weight: 600; }
.facts dd { margin: 0; color: var(--ink-2); }

/* faq */
.faq { border-top: 1px solid var(--rule-strong); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 22px 0; list-style: none; cursor: pointer;
  font-family: var(--display); font-weight: 600; font-size: 1.15rem; letter-spacing: -0.01em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: 0 0 22px; height: 22px; background:
    linear-gradient(var(--signal), var(--signal)) center / 12px 2px no-repeat,
    linear-gradient(var(--signal), var(--signal)) center / 2px 12px no-repeat;
  transition: transform 0.3s var(--ease);
}
.faq details[open] summary::after { transform: rotate(135deg); }
.faq details > div { padding: 0 48px 26px 0; color: var(--ink-2); max-width: 44em; }
.faq details > div p:last-child { margin-bottom: 0; }

/* contact — inverted block, the page's closing statement */
.contact { background: var(--block-bg); color: var(--block-fg); border-top: 0; }
.contact-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(36px, 6vw, 96px); align-items: start; }
.contact h2 { font-size: clamp(2.2rem, 1.2rem + 3.8vw, 4.4rem); font-stretch: 86%; font-weight: 650; }
.contact p { color: var(--block-fg-2); max-width: 30em; margin-top: 22px; }
.contact .brief-list li { margin: 0; }
.big-mail {
  display: inline-block; margin-top: 18px; font-family: var(--display); font-weight: 600; font-stretch: 90%;
  font-size: clamp(1.3rem, 0.8rem + 2.2vw, 2.3rem); letter-spacing: -0.02em; color: var(--block-fg); text-decoration: none;
  overflow-wrap: anywhere;
  background: linear-gradient(var(--signal-fill), var(--signal-fill)) 0 100% / 100% 2px no-repeat; padding-bottom: 4px;
  transition: background-size 0.4s var(--ease), color 0.2s;
}
.big-mail:hover { background-size: 100% 100%; color: var(--on-signal); }
.contact-line { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 18px; }
.copy-mail { padding: 0 14px; min-height: 38px; border-radius: 9px; border: 1px solid var(--block-rule); background: transparent; color: var(--block-fg); font-family: var(--display); font-weight: 500; font-size: 0.88rem; transition: border-color 0.2s; }
.copy-mail:hover { border-color: var(--block-fg-2); }
.contact .socials { display: flex; gap: 22px; margin-top: 34px; font-family: var(--display); font-weight: 500; }
.contact .socials a { color: var(--block-fg); text-decoration: underline; text-decoration-color: var(--block-rule); text-underline-offset: 0.25em; }
.contact .socials a:hover { text-decoration-color: var(--signal-fill); }

.brief h3 { margin-bottom: 18px; font-size: 1.35rem; color: var(--block-fg); }
.brief-list { list-style: none; border-top: 1px solid var(--block-rule); }
.brief-list li { padding: 14px 0; border-bottom: 1px solid var(--block-rule); color: var(--block-fg-2); font-size: 1rem; }
.brief-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn-light { border-color: var(--block-rule); color: var(--block-fg); }
.btn-light:hover { border-color: var(--block-fg-2); }

/* footer */
.site-footer { padding: 36px 0 48px; border-top: 1px solid var(--block-rule); background: var(--block-bg); color: var(--block-fg-2); font-family: var(--display); font-size: 0.9rem; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px 32px; }
.footer-row ul { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; }
.footer-row a { color: var(--block-fg-2); text-decoration: none; }
.footer-row a:hover { color: var(--block-fg); text-decoration: underline; }
.site-footer p { margin: 0; }

/* ---------- command palette + toast ---------- */

.palette {
  width: min(620px, calc(100% - 32px)); margin: 12vh auto 0; padding: 0; border: 1px solid var(--rule-strong);
  border-radius: 16px; background: var(--paper); color: var(--ink); box-shadow: 0 40px 100px -20px rgb(0 0 0 / 0.5);
}
.palette::backdrop { background: rgb(8 14 26 / 0.55); backdrop-filter: blur(3px); }
.palette[open] { animation: pop 0.22s var(--ease); }
@keyframes pop { from { opacity: 0; transform: translateY(-8px) scale(0.98); } to { opacity: 1; transform: none; } }
.palette-input { width: 100%; padding: 20px 22px; border: 0; border-bottom: 1px solid var(--rule); border-radius: 16px 16px 0 0; background: transparent; font-family: var(--display); font-size: 1.1rem; }
.palette-input:focus { outline: none; }
.palette-list { max-height: min(52vh, 420px); margin: 0; padding: 8px; overflow-y: auto; list-style: none; }
.palette-group { padding: 10px 14px 4px; font-family: var(--display); font-weight: 500; font-size: 0.78rem; color: var(--ink-2); }
.palette-item { display: flex; justify-content: space-between; gap: 16px; padding: 10px 14px; border-radius: 10px; font-family: var(--display); font-weight: 500; cursor: pointer; }
.palette-item[aria-selected="true"] { background: var(--signal-fill); color: var(--on-signal); }
.palette-item small { font: 400 0.75rem var(--mono); opacity: 0.75; align-self: center; }
.palette-empty { padding: 22px 14px; color: var(--ink-2); font-family: var(--display); }
.palette-foot { display: flex; gap: 18px; padding: 10px 18px; border-top: 1px solid var(--rule); font: 400 0.72rem var(--mono); color: var(--ink-2); }

.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 250; transform: translate(-50%, 24px); opacity: 0; pointer-events: none;
  padding: 11px 18px; border-radius: 10px; background: var(--ink); color: var(--paper); font-family: var(--display); font-weight: 500; font-size: 0.92rem;
  transition: opacity 0.25s, transform 0.35s var(--ease);
}
.toast.is-on { opacity: 1; transform: translate(-50%, 0); }

/* theme switch: circular reveal from the button */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 2; }

/* ---------- article pages ---------- */

.page-top { padding: clamp(120px, 13vw, 170px) 0 clamp(36px, 5vw, 64px); }
.crumbs { margin: 0 0 28px; font-family: var(--display); font-weight: 500; font-size: 0.9rem; color: var(--ink-2); }
.crumbs ol { display: flex; flex-wrap: wrap; gap: 6px 10px; list-style: none; }
.crumbs li + li::before { content: "/"; margin-right: 10px; color: var(--rule-strong); }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--ink); text-decoration: underline; }
.page-top h1 { max-width: 16em; font-size: clamp(2.3rem, 1.2rem + 4.2vw, 4.6rem); font-stretch: 88%; font-weight: 650; letter-spacing: -0.03em; line-height: 1.02; }
.page-sub { max-width: 38em; margin: 22px 0 0; font-size: clamp(1.1rem, 1rem + 0.5vw, 1.3rem); color: var(--ink-2); line-height: 1.55; }
.byline { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; margin-top: 26px; font-family: var(--display); font-weight: 500; font-size: 0.92rem; color: var(--ink-2); }
.byline a { color: var(--ink); text-decoration-color: var(--rule-strong); text-underline-offset: 0.2em; }

.article-grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 8fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); padding-bottom: clamp(64px, 8vw, 110px); }
.toc { position: sticky; top: 100px; align-self: start; font-family: var(--display); font-size: 0.92rem; }
.toc-title { margin: 0 0 12px; font-weight: 600; color: var(--ink-2); }
.toc ol { list-style: none; border-left: 1px solid var(--rule); }
.toc a { display: block; padding: 6px 0 6px 14px; margin-left: -1px; border-left: 2px solid transparent; color: var(--ink-2); text-decoration: none; transition: color 0.15s, border-color 0.15s; }
.toc a:hover, .toc a.is-current { color: var(--ink); border-left-color: var(--signal); }

.prose { font-size: 1.125rem; line-height: 1.78; }
.prose > *:not(.code) { max-width: 40rem; }
.prose > * + * { margin-top: 1.25em; }
.prose h2 { margin-top: 2.2em; font-size: clamp(1.6rem, 1.3rem + 1.1vw, 2.15rem); font-stretch: 92%; scroll-margin-top: 96px; }
.prose h3 { margin-top: 1.8em; font-size: 1.3rem; }
.prose p { margin-bottom: 0; }
.prose a { color: var(--signal); text-underline-offset: 0.18em; }
.prose strong { font-weight: 650; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: 0.5em; }
.prose li::marker { color: var(--signal); }
.prose code:not(pre code) { padding: 0.1em 0.35em; border-radius: 5px; background: var(--paper-2); border: 1px solid var(--rule); font-family: var(--mono); font-size: 0.82em; }
.prose .code { margin-top: 1.6em; margin-bottom: 1.6em; font-size: 1rem; }
.prose .callout { padding: 16px 20px; border-left: 3px solid var(--signal); background: var(--paper-2); border-radius: 0 10px 10px 0; font-size: 1.02rem; }
.prose .callout p + p { margin-top: 0.7em; }

.author { display: grid; grid-template-columns: 84px minmax(0, 1fr); gap: 20px; align-items: center; margin-top: 3.2em; padding: 24px; border: 1px solid var(--rule); border-radius: var(--radius); font-size: 1rem; line-height: 1.6; }
.author img { width: 84px; height: 84px; border-radius: 50%; object-fit: cover; object-position: 50% 20%; }
.author p { margin: 0; }
.author p + p { margin-top: 6px; color: var(--ink-2); font-size: 0.95rem; }

.more { padding: clamp(56px, 7vw, 96px) 0; border-top: 1px solid var(--rule); background: var(--paper-2); }
.more h2 { margin-bottom: 28px; font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem); }

.legal { padding-bottom: clamp(64px, 8vw, 110px); }
.legal > * { max-width: 40rem; }
.legal h2 { margin-top: 2em; font-size: 1.6rem; }
.legal p, .legal ul { margin-top: 0.9em; }
.legal ul { padding-left: 1.2em; }

.notfound { min-height: 80vh; display: grid; align-content: center; padding-top: 120px; }
.notfound h1 { font-size: clamp(3rem, 1.5rem + 8vw, 9rem); font-stretch: 80%; font-weight: 700; letter-spacing: -0.04em; line-height: 0.95; }
.notfound .code { max-width: 560px; margin: 32px 0; }

/* ---------- industries + interests: icon marks ---------- */

.section-intro { max-width: 42em; margin-bottom: clamp(32px, 5vw, 56px); }
.section-intro p { margin: 18px 0 0; color: var(--ink-2); font-size: 1.05rem; max-width: 34em; }

.marks { --accent: var(--signal); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; list-style: none; border: 1px solid var(--rule); background: var(--rule); border-radius: var(--radius); overflow: hidden; }
.marks-int { --accent: var(--spruce); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.mark { position: relative; padding: 30px 26px 32px; background: var(--paper); transition: background 0.3s; }
.band-tint .mark { background: var(--paper-2); }
.mark:hover { background: color-mix(in srgb, var(--accent) 6%, var(--paper)); }
.band-tint .mark:hover { background: color-mix(in srgb, var(--accent) 7%, var(--paper-2)); }
.mark h3 { margin-top: 22px; font-size: 1.15rem; }
.mark p { margin: 8px 0 0; color: var(--ink-2); font-size: 0.95rem; line-height: 1.55; }
.marks-int .mark { padding: 36px 30px 38px; }
.marks-int .mark p { font-size: 1rem; }
.mark-cta { background: transparent; }
.mark-ic {
  display: grid; place-items: center; width: 72px; height: 72px; border-radius: 20px; color: var(--ink);
  border: 1px solid var(--rule-strong);
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%), var(--paper-2);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.4s var(--ease);
}
.band-tint .mark-ic { background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%), var(--paper); }
.marks-int .mark-ic { width: 84px; height: 84px; border-radius: 24px; }
.mark:hover .mark-ic { border-color: var(--accent); box-shadow: 0 10px 28px -10px color-mix(in srgb, var(--accent) 55%, transparent); transform: translateY(-3px); }
.ic { width: 46px; height: 46px; overflow: visible; }
.marks-int .ic { width: 54px; height: 54px; }
.ic .a { stroke: var(--accent); }
.ic .wheel, .ic .spin, .ic .pupil, .ic .pct, .ic .flame, .ic .needle, .ic .leaf, .ic .hammer, .ic .card, .ic .ln, .ic .sun, .ic .st, .ic .pkg, .ic .plus { transform-box: fill-box; transform-origin: center; }
.ic .liq { fill: var(--accent); fill-opacity: 0.22; stroke: var(--accent); }
.ic .glow { fill: var(--accent); opacity: 0; transition: opacity 0.4s; }

/* draw-in: lines trace themselves once, when the grid scrolls into view */
.js .draw-in:not(.is-drawn) .d { stroke-dasharray: 1; stroke-dashoffset: 1; }
.js .draw-in.is-drawn .d { stroke-dasharray: 1; stroke-dashoffset: 0; transition: stroke-dashoffset 1.3s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }
.js.fallback .d { stroke-dasharray: none !important; stroke-dashoffset: 0 !important; }

/* one small motion per mark, on hover */
.mark:hover .pkg { animation: pkg-drop 0.9s var(--ease) both; }
.mark:hover .wheel { animation: spin 0.8s linear infinite; }
.mark:hover .cbody { animation: bob 0.45s ease-in-out infinite alternate; }
.mark:hover .w1 { animation: pulse 1.1s ease-in-out infinite; }
.mark:hover .w2 { animation: pulse 1.1s ease-in-out 0.3s infinite; }
.mark:hover .spin { animation: spin 2.2s linear infinite; }
.mark:hover .liq { animation: slosh 1.6s linear infinite; }
.ic .chk { stroke-dasharray: 1; }
.mark:hover .chk { animation: tick 1.5s ease-in-out infinite; }
.mark:hover .pupil { animation: look 2.2s ease-in-out infinite; }
.pct { transition: transform 0.9s var(--ease); }
.mark:hover .pct { transform: rotate(360deg); }
.ic .flame { transform-origin: 50% 100%; animation: flick 2.6s ease-in-out infinite; }
.mark:hover .glow { opacity: 0.18; }
.ic .spd { opacity: 0.35; }
.mark:hover .spd { animation: speed 0.7s linear infinite; }
.ic .card { transition: transform 0.5s var(--ease); }
.mark:hover .card { transform: rotate(-5deg) scale(1.04); }
.ic .ln { transform-origin: 0 50%; }
.mark:hover .ln { animation: line-in 0.9s var(--ease) both; }
.mark:hover .ln2 { animation-delay: 0.12s; }
.mark:hover .ln3 { animation-delay: 0.24s; }
.mark:hover .plus { animation: spin-once 0.9s var(--ease) both; }

.ic .leaf-l { transform-origin: 100% 100%; }
.ic .leaf-r { transform-origin: 0 100%; }
.mark:hover .leaf { animation: grow 0.9s var(--ease) both; }
.ic .hammer { transform-origin: 50% 100%; transform: rotate(-24deg); }
.mark:hover .hammer { animation: swing 0.65s ease-in infinite alternate; }
.ic .needle { transition: transform 1.4s cubic-bezier(0.3, 1.5, 0.5, 1); }
.mark:hover .needle { transform: rotate(200deg); }
.ic .sun { transition: transform 0.7s var(--ease); transform: translateY(5px); }
.mark:hover .sun { transform: translateY(-1px); }
.ic .trail { stroke-dasharray: 2 4; }
.mark:hover .trail { animation: march 0.9s linear infinite; }
.mark:hover .st { animation: steam 1.9s ease-in-out infinite; }
.mark:hover .st2 { animation-delay: 0.3s; }
.mark:hover .st3 { animation-delay: 0.6s; }
.ic .rays { opacity: 0.4; }
.mark:hover .rays { animation: pulse 1.2s ease-in-out infinite; }

/* technologies and AI tools */
.marks-tech { --accent: var(--spruce); }
.marks-c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.marks-c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.marks-tech .mark { padding: 28px 24px 30px; }
.marks-ai { --accent: var(--ai); }
.mark-group + .mark-group { margin-top: clamp(26px, 3.5vw, 40px); }
.group-title { margin: 0 0 14px; font: 600 0.8rem var(--display); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }
.after-marks { margin: 22px 0 0; color: var(--ink-2); font-size: 1rem; }
.ic .lay { transition: transform 0.5s var(--ease); }
.mark:hover .l1 { transform: translateY(-3px); }
.mark:hover .l3 { transform: translateY(3px); }
.mark:hover .bolt { animation: flash 0.9s ease-in-out infinite; }
.ic .sw { transform-box: view-box; }
.ic .sw-l { transform-origin: 10px 8px; transform: rotate(32deg); }
.ic .sw-r { transform-origin: 38px 8px; }
.mark:hover .sw-l { animation: cradle-l 1.6s ease-in-out infinite; }
.mark:hover .sw-r { animation: cradle-r 1.6s ease-in-out infinite; }
.ic .nd { transform-box: fill-box; transform-origin: center; }
.mark:hover .nd { animation: node-pulse 1.4s ease-in-out infinite; }
.mark:hover .nd2, .mark:hover .nd4 { animation-delay: 0.3s; }
.mark:hover .nd3, .mark:hover .nd5 { animation-delay: 0.6s; }
.ic .tfill { fill: var(--accent); fill-opacity: 0; transition: fill-opacity 0.5s; }
.ic .knob { fill: var(--paper); transition: transform 0.5s var(--ease), fill 0.5s; }
.band-tint .ic .knob { fill: var(--paper-2); }
.mark:hover .tfill { fill-opacity: 0.2; }
.mark:hover .knob { transform: translateX(19px); fill: var(--accent); }
.ic .core { fill: var(--accent); fill-opacity: 0.18; transform-box: fill-box; transform-origin: center; }
.mark:hover .core { animation: core-pulse 1.1s ease-in-out infinite; }
.ic .arr { transition: transform 0.4s var(--ease); }
.mark:hover .arr1 { animation: shuttle 1.1s ease-in-out infinite; }
.mark:hover .arr2 { animation: shuttle 1.1s ease-in-out 0.55s infinite reverse; }
.ic .ghost { stroke-dasharray: 2 4; opacity: 0.85; }
.mark:hover .ghost { animation: march 0.9s linear infinite; }
.ic .key { transition: transform 0.25s var(--ease); }
.mark:hover .key { animation: key-press 1.3s ease-in-out infinite; }
.mark:hover .dot { animation: hop 0.9s ease-in-out infinite; }
.mark:hover .dot2 { animation-delay: 0.15s; }
.mark:hover .dot3 { animation-delay: 0.3s; }
.ic .sp { transform-box: fill-box; transform-origin: center; }
.mark:hover .sp1 { animation: spark-turn 2.4s ease-in-out infinite; }
.mark:hover .sp2 { animation: spark 1.2s ease-in-out infinite; }
.mark:hover .sp3 { animation: spark 1.2s ease-in-out 0.5s infinite; }
.ic .ptr { transition: transform 0.45s var(--ease); }
.mark:hover .ptr { transform: translate(4px, 4px); }
.ic .chk2 { animation-delay: 0.45s !important; }
.mark:hover .ln1 { animation-delay: 0s; }

@keyframes flash { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }
@keyframes cradle-l { 0% { transform: rotate(32deg); } 25% { transform: rotate(0); } 75% { transform: rotate(0); } 100% { transform: rotate(32deg); } }
@keyframes cradle-r { 0%, 25% { transform: rotate(0); } 50% { transform: rotate(-32deg); } 75%, 100% { transform: rotate(0); } }
@keyframes node-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.3); } }
@keyframes core-pulse { 0%, 100% { transform: scale(1); fill-opacity: 0.18; } 50% { transform: scale(1.18); fill-opacity: 0.5; } }
@keyframes shuttle { 0%, 100% { transform: translateX(-2px); } 50% { transform: translateX(2px); } }
@keyframes key-press { 0%, 55%, 100% { transform: translateY(0); } 65%, 80% { transform: translateY(1.8px); } }
@keyframes hop { 0%, 100% { transform: translateY(0); } 40% { transform: translateY(-4px); } }
@keyframes spark-turn { 0%, 100% { transform: rotate(0) scale(1); } 50% { transform: rotate(45deg) scale(1.12); } }
@keyframes spark { 0%, 100% { transform: scale(0.8); opacity: 0.5; } 50% { transform: scale(1.25); opacity: 1; } }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-once { to { transform: rotate(180deg); } }
@keyframes pkg-drop { 0% { transform: translateY(-7px); opacity: 0; } 45% { opacity: 1; } 100% { transform: translateY(4px); opacity: 1; } }
@keyframes bob { to { transform: translateY(-1.2px); } }
@keyframes pulse { 0%, 100% { opacity: 0.25; } 50% { opacity: 1; } }
@keyframes slosh { to { transform: translateX(-24px); } }
@keyframes tick { 0% { stroke-dashoffset: 1; } 45%, 100% { stroke-dashoffset: 0; } }
@keyframes look { 0%, 100% { transform: translateX(0); } 30% { transform: translateX(-5px); } 70% { transform: translateX(5px); } }
@keyframes flick { 0%, 100% { transform: scale(1, 1) rotate(0); } 30% { transform: scale(0.93, 1.07) rotate(-2.5deg); } 60% { transform: scale(1.05, 0.95) rotate(2.5deg); } }
@keyframes speed { 0% { transform: translateX(7px); opacity: 0; } 50% { opacity: 1; } 100% { transform: translateX(-4px); opacity: 0; } }
@keyframes line-in { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes grow { from { transform: scale(0.35) rotate(-6deg); } 60% { transform: scale(1.08); } to { transform: scale(1); } }
@keyframes swing { from { transform: rotate(-28deg); } to { transform: rotate(10deg); } }
@keyframes march { to { stroke-dashoffset: -12; } }
@keyframes steam { 0% { transform: translateY(5px); opacity: 0; } 40% { opacity: 1; } 100% { transform: translateY(-6px); opacity: 0; } }

@media (max-width: 1020px) {
  .marks, .marks-int, .marks-c3, .marks-c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .marks, .marks-int, .marks-c3, .marks-c4 { grid-template-columns: 1fr; }
  .mark, .marks-int .mark { display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 18px; align-items: start; padding: 22px 20px 24px; }
  .mark-ic, .marks-int .mark-ic { grid-row: span 2; width: 62px; height: 62px; border-radius: 18px; }
  .ic, .marks-int .ic { width: 38px; height: 38px; }
  .mark h3, .marks-int .mark h3 { margin-top: 2px; }
  .mark p { margin-top: 4px; }
}
@media (hover: none) {
  .ic .sun { transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  .js .draw-in:not(.is-drawn) .d { stroke-dashoffset: 0; }
  .ic .flame { animation: none; }
}

/* ---------- responsive ---------- */

@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .portrait { justify-self: start; width: min(100%, 300px); }
  .split, .ai-grid, .contact-grid, .trace-panel { grid-template-columns: 1fr; }
  .split-head { position: static; }
  .article-grid { grid-template-columns: minmax(0, 1fr); }
  .toc { position: static; }
  .toc ol { display: flex; flex-wrap: wrap; gap: 4px 18px; border-left: 0; }
  .toc a { padding: 4px 0; border-left: 0; }
}

@media (max-width: 820px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-grid; }
  .nav-links.is-open {
    display: flex; position: fixed; inset: 68px 12px auto; flex-direction: column; align-items: stretch; gap: 0;
    padding: 10px; border: 1px solid var(--rule-strong); border-radius: 16px; background: var(--paper);
    box-shadow: 0 30px 80px -20px rgb(0 0 0 / 0.5);
  }
  .nav-links.is-open a { display: block; padding: 14px 12px; font-size: 1.05rem; }
  .nav-links.is-open a::after { display: none; }
  .row { grid-template-columns: 1fr; padding-inline: 4px; }
  .trace-nav { grid-template-columns: 1fr; gap: 6px; }
  .trace-nav::before { top: 8px; bottom: 8px; left: 8px; right: auto; width: 2px; height: auto; }
  .trace-packet { display: none; }
  .stop { display: flex; align-items: baseline; gap: 10px; padding: 10px 8px 10px 38px; text-align: left; }
  .stop::before { top: 14px; left: 8px; }
  .stop span { margin-top: 0; }
  .toolkit > div, .facts > div { grid-template-columns: 1fr; }
  .note { grid-template-columns: 1fr; gap: 4px; padding: 22px 0; }
  .note .mins { order: 3; }
  .steps { padding-left: 54px; }
  .steps li::before { left: -54px; width: 36px; height: 36px; }
  .steps::before, .steps::after { left: 17px; }
  .author { grid-template-columns: 64px minmax(0, 1fr); padding: 18px; }
  .author img { width: 64px; height: 64px; }
}

@media (max-width: 520px) {
  .hero-actions .btn { width: 100%; }
  .btn-palette kbd { display: none; }
  .faq details > div { padding-right: 0; }
}

@media (hover: none) {
  .row::before { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-delay: 0ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  .js .hero-name .ch { transform: none; }
  .js .hero-fade, .js .portrait { opacity: 1; }
  .trace-packet { display: none; }
}

@media print {
  .site-header, .progress, .hero-bg, .forest, .palette, .toast, .contact form, .skip-link { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  body::after { display: none; }
  .contact, .site-footer { background: none; color: #000; }
  a { text-decoration: underline; }
}

/* ---------- alberta scene: Three Sisters, the Bow, pines, sun and moon ---------- */

:root {
  --sk0: rgb(146 188 222 / 0.6); --sk1: rgb(206 225 240 / 0.5); --sk2: rgb(238 241 244 / 0);
  --gs0: rgb(255 246 214 / 0.95); --gs1: rgb(255 238 196 / 0.34); --gs2: rgb(255 238 196 / 0);
  --gm0: rgb(255 255 255 / 0); --gm1: rgb(255 255 255 / 0); --gm2: rgb(255 255 255 / 0);
  --gd0: #fffcec; --gd1: #ffe7a0;
  --gc0: rgb(255 255 255 / 0.96); --gc1: rgb(250 252 255 / 0.72); --gc2: rgb(236 244 252 / 0); --cl-base: rgb(150 172 202 / 0.12);
  --ms: rgb(238 241 244);
  --m1a: #aebfd4; --m1b: #cfdae7; --sd1: rgb(64 92 130 / 0.3);
  --m2a: #91a6c1; --m2b: #b5c4d6; --sd2: rgb(52 78 116 / 0.42);
  --m3a: #e6e1d6; --m3b: #bcc0c6; --m3c: #98a7ba; --sd3: rgb(44 66 102 / 0.55);
  --snow: #fcfeff; --strata: rgb(45 60 88 / 0.11); --rim: rgb(255 255 255 / 0.8); --rimd: rgb(40 58 88 / 0.34);
  --f0: #4b685f; --f1: #7d9690; --tree: #3e5c52;
  --l0: #bccaad; --l1: #9fb392; --grass: rgb(64 96 66 / 0.16);
  --pn-l: #3f6155; --pn-r: #2c4840; --pn-k: #4a3b31;
  --sun-o: 1; --moon-o: 0; --star-o: 0;
  --forest-a: color-mix(in srgb, var(--spruce) 15%, var(--paper));
  --forest-b: color-mix(in srgb, var(--spruce) 26%, var(--paper));
}
:root[data-theme="dark"] {
  --sk0: rgb(3 7 15 / 0.96); --sk1: rgb(12 24 43 / 0.72); --sk2: rgb(11 19 32 / 0);
  --gs0: rgb(255 255 255 / 0); --gs1: rgb(255 255 255 / 0); --gs2: rgb(255 255 255 / 0);
  --gm0: rgb(214 230 255 / 0.5); --gm1: rgb(150 180 225 / 0.16); --gm2: rgb(120 150 210 / 0);
  --gd0: #fbfdff; --gd1: #cfdbea;
  --gc0: rgb(92 112 152 / 0.62); --gc1: rgb(62 82 124 / 0.4); --gc2: rgb(40 60 100 / 0); --cl-base: rgb(14 24 44 / 0.4);
  --ms: rgb(11 19 32);
  --m1a: #2a4064; --m1b: #1a2c49; --sd1: rgb(4 9 20 / 0.5);
  --m2a: #263d61; --m2b: #15253f; --sd2: rgb(3 7 16 / 0.5);
  --m3a: #6f8bb4; --m3b: #3a4f73; --m3c: #1d2d48; --sd3: rgb(3 7 16 / 0.62);
  --snow: #d4e0f1; --strata: rgb(170 195 230 / 0.09); --rim: rgb(190 214 248 / 0.7); --rimd: rgb(0 0 0 / 0.4);
  --f0: #17313b; --f1: #102430; --tree: #0b1d26;
  --l0: #1b3441; --l1: #122430; --grass: rgb(140 190 170 / 0.07);
  --pn-l: #1d3a43; --pn-r: #0c1c24; --pn-k: #0a0f14;
  --sun-o: 0; --moon-o: 1; --star-o: 1;
  --forest-a: color-mix(in srgb, var(--spruce) 14%, var(--paper));
  --forest-b: color-mix(in srgb, var(--spruce) 22%, var(--paper));
}

.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
/* the edges melt into the page with a paper-coloured overlay (cheaper to draw than a mask), and a soft veil sits behind the text */
.hero-bg::after {
  content: ""; position: absolute; inset: 0; z-index: 3;
  --fade: linear-gradient(to bottom, var(--paper) 0, transparent 12%, transparent 86%, var(--paper) 100%);
  background:
    var(--fade),
    radial-gradient(ellipse 66% 66% at 20% 58%, color-mix(in srgb, var(--paper) 93%, transparent) 0%, color-mix(in srgb, var(--paper) 76%, transparent) 44%, transparent 100%);
}
.hero-bg > * { position: absolute; inset: 0; }
.scene { display: block; width: 100%; height: 100%; overflow: hidden; }
.hero-bg { contain: layout paint; }

/* gradient stops */
.sk0 { stop-color: var(--sk0); } .sk1 { stop-color: var(--sk1); } .sk2 { stop-color: var(--sk2); }
.gs0 { stop-color: var(--gs0); } .gs1 { stop-color: var(--gs1); } .gs2 { stop-color: var(--gs2); }
.gm0 { stop-color: var(--gm0); } .gm1 { stop-color: var(--gm1); } .gm2 { stop-color: var(--gm2); }
.gd0 { stop-color: var(--gd0); } .gd1 { stop-color: var(--gd1); }
.gc0 { stop-color: var(--gc0); } .gc1 { stop-color: var(--gc1); } .gc2 { stop-color: var(--gc2); }
.ms0, .ms2 { stop-color: var(--ms); stop-opacity: 0; } .ms1 { stop-color: var(--ms); stop-opacity: 0.6; }
.m1a { stop-color: var(--m1a); } .m1b { stop-color: var(--m1b); }
.m2a { stop-color: var(--m2a); } .m2b { stop-color: var(--m2b); }
.m3a { stop-color: var(--m3a); } .m3b { stop-color: var(--m3b); } .m3c { stop-color: var(--m3c); }
.f0 { stop-color: var(--f0); } .f1 { stop-color: var(--f1); }
.l0 { stop-color: var(--l0); } .l1 { stop-color: var(--l1); }

.skyfill { fill: url(#gsky); }
.glow-sun { fill: url(#gsun); } .halo-sun { fill: none; stroke: rgb(255 240 190 / 0.5); stroke-width: 1; }
.disc-sun { fill: url(#gdisc); }
.glow-moon { fill: url(#gmoon); } .disc-moon { fill: url(#gdisc); } .rim-moon { fill: none; stroke: rgb(255 255 255 / 0.5); stroke-width: 0.8; }
.maria { fill: rgb(120 138 162 / 0.28); }
.sun { opacity: var(--sun-o); transition: opacity 0.7s ease; }
.moon { opacity: var(--moon-o); transition: opacity 0.7s ease; }
.starfield { opacity: var(--star-o); transition: opacity 0.7s ease; }
.starfield svg { display: block; width: 100%; height: 100%; fill: #fff; }
.stars { position: absolute; inset: 0; will-change: opacity; }

/* clouds: plain elements painted with gradients, slid across on the compositor */
.cloud {
  --cw: 30%;
  position: absolute; inset: auto auto auto 0; width: var(--cw); aspect-ratio: 3 / 1; will-change: transform;
  --p: radial-gradient(closest-side, var(--gc0), var(--gc1) 52%, var(--gc2) 100%);
  background:
    var(--p) 8% 74% / 26% 60% no-repeat,
    var(--p) 28% 46% / 30% 78% no-repeat,
    var(--p) 50% 30% / 34% 88% no-repeat,
    var(--p) 70% 52% / 30% 74% no-repeat,
    var(--p) 92% 72% / 26% 56% no-repeat,
    var(--p) 50% 92% / 90% 44% no-repeat;
}
.cl-a { top: 9%; --cw: 26%; } .cl-b { top: 19%; --cw: 34%; opacity: 0.8; } .cl-c { top: 5%; --cw: 20%; opacity: 0.7; }
.cl-d { top: 27%; --cw: 24%; opacity: 0.6; } .cl-e { top: 14%; --cw: 30%; opacity: 0.75; }
.mist { fill: url(#gmist); }

.r1 { fill: url(#gm1); } .r2 { fill: url(#gm2); } .r3 { fill: url(#gm3); }
.ly1 .shade, .ly1 .shade2 { fill: var(--sd1); } .ly2 .shade, .ly2 .shade2 { fill: var(--sd2); } .ly3 .shade, .ly3 .shade2 { fill: var(--sd3); }
.shade2 { opacity: 0.55; }
.strata { fill: none; stroke: var(--strata); stroke-width: 1; }
.snow { fill: var(--snow); }
.rim { fill: none; stroke: var(--rim); stroke-width: 1.3; stroke-linecap: round; stroke-linejoin: round; }
.rimd { fill: none; stroke: var(--rimd); stroke-width: 1; stroke-linecap: round; stroke-linejoin: round; }
.ly1 .rim, .ly1 .rimd { opacity: 0.5; } .ly2 .rim, .ly2 .rimd { opacity: 0.75; }
.hill { fill: url(#gf1); } .trees1 { fill: var(--tree); }
.meadow { fill: url(#gl1); }
.grass { fill: none; stroke: var(--grass); stroke-width: 1; }
.tl { fill: var(--pn-l); } .tr { fill: var(--pn-r); } .tk { fill: var(--pn-k); }


/* parallax, driven by the pointer (see main.js) */

.ly0 { transform: translate(calc(var(--px, 0) * -4px), calc(var(--py, 0) * -3px)); }
.ly1 { transform: translate(calc(var(--px, 0) * -8px), calc(var(--py, 0) * -4px)); }
.ly2 { transform: translate(calc(var(--px, 0) * -14px), calc(var(--py, 0) * -6px)); }
.ly3 { transform: translate(calc(var(--px, 0) * -22px), calc(var(--py, 0) * -8px)); }
.ly4 { transform: translate(calc(var(--px, 0) * -34px), calc(var(--py, 0) * -10px)); }

@keyframes reveal { from { opacity: 0; } to { opacity: 1; } }
@keyframes drift { from { transform: translateX(-130%); } to { transform: translateX(450%); } }
@keyframes twinkle { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }

.scene { animation: reveal 1.4s ease both; }

.cloud { animation: drift 240s linear infinite; }
.cl-b { animation-duration: 300s; animation-delay: -90s; } .cl-c { animation-duration: 360s; animation-delay: -210s; }
.cl-d { animation-duration: 210s; animation-delay: -150s; } .cl-e { animation-duration: 280s; animation-delay: -40s; }
.cl-a { animation-delay: -170s; }
.stars.t0 { animation: twinkle 4s ease-in-out infinite; } .stars.t1 { animation: twinkle 5.5s ease-in-out infinite -1.5s; }
.stars.t2 { animation: twinkle 3.6s ease-in-out infinite -2.4s; }
.hero-off .stars, .hero-off .cloud { animation-play-state: paused; }

/* tablets and phones: the whole skyline sits behind the heading, the valley stays out of the copy */
@media (max-width: 1020px) {
  .hero-bg { inset: 72px 0 auto 0; height: max(440px, 62vw); }
  .hero-bg::after { background: var(--fade), linear-gradient(to bottom, transparent 0, color-mix(in srgb, var(--paper) 62%, transparent) 56%, color-mix(in srgb, var(--paper) 86%, transparent) 100%); }
}
@media (max-width: 720px) {
  .hero-bg { inset: 72px auto auto calc(5vw - 340px); width: 190vw; height: 450px; }
  .sun, .moon { transform: translate(620px, -50px); }
}

main { position: relative; }

/* pines that fade in and out behind the page */
.forest {
  position: fixed; left: 0; right: 0; bottom: 0; height: clamp(130px, 22vh, 230px); z-index: -1; pointer-events: none;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(to top, #000 0, rgb(0 0 0 / 0.55) 55%, transparent 100%);
  mask-image: linear-gradient(to top, #000 0, rgb(0 0 0 / 0.55) 55%, transparent 100%);
}
body:has(.hero) .forest { opacity: calc(min(1, var(--sp, 0) * 7) * (0.22 + var(--sp, 0) * 0.3)); }
.forest svg { display: block; width: 100%; height: 100%; }
.forest .tl, .forest .tr { fill: var(--forest-a); } .forest .tk { fill: var(--forest-a); }
.forest .fgnd { fill: var(--forest-b); }
.forest .fr-mid .tl, .forest .fr-mid .tr, .forest .fr-mid .tk { fill: color-mix(in srgb, var(--forest-a) 50%, var(--forest-b)); }
.forest .fr-front .tl, .forest .fr-front .tr, .forest .fr-front .tk { fill: var(--forest-b); }

@media (prefers-reduced-motion: reduce) {
  .scene *, .ly, .cloud, .stars { animation: none !important; transition: none !important; }
  .scene { animation: none !important; }
  .cloud { transform: translateX(60%); }
}

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.why { margin: 2.2em 0 1.6em; padding: 22px 24px 8px; border-left: 3px solid var(--spruce); background: color-mix(in srgb, var(--spruce) 7%, transparent); border-radius: 0 14px 14px 0; }
.why h3 { font-size: 1.15rem; margin: 0 0 0.6em; }
.why p { color: var(--ink-2); font-size: 1rem; }
.hero .status, .hero-role, .hero-intro { text-shadow: 0 0 14px var(--paper), 0 0 5px var(--paper), 0 0 2px var(--paper); }


/* back to top: a round button with a ring that fills as you read down the page */
.to-top {
  position: fixed; right: max(18px, env(safe-area-inset-right)); bottom: max(18px, env(safe-area-inset-bottom)); z-index: 90;
  display: grid; place-items: center; width: 52px; height: 52px; padding: 0; border: 0; border-radius: 50%; cursor: pointer;
  color: var(--ink); background: color-mix(in srgb, var(--paper) 88%, transparent);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  box-shadow: 0 10px 28px -10px rgb(15 26 43 / 0.45), 0 0 0 1px var(--rule);
  opacity: 0; transform: translateY(16px) scale(0.9); pointer-events: none;
  transition: opacity 0.3s ease, transform 0.35s var(--ease), background 0.2s ease, color 0.2s ease;
}
.to-top[hidden] { display: none; }
.to-top.is-on { opacity: 1; transform: none; pointer-events: auto; }
.to-top svg { width: 100%; height: 100%; display: block; overflow: visible; }
.to-top circle { transform: rotate(-90deg); transform-origin: 24px 24px; }
.to-top .tt-track { fill: none; stroke: var(--rule); stroke-width: 2; }
.to-top .tt-ring { fill: none; stroke: var(--signal-fill, var(--spruce)); stroke-width: 2.4; stroke-linecap: round; stroke-dasharray: 1; stroke-dashoffset: calc(1 - var(--sp, 0)); }
.to-top .tt-arrow { fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; transition: transform 0.3s var(--ease); }
.to-top:hover { background: var(--signal-fill, var(--spruce)); color: var(--on-signal, #fff); }
.to-top:hover .tt-arrow { transform: translateY(-3px); }
.to-top:hover .tt-ring { stroke: currentColor; }
.to-top:focus-visible { outline: 2px solid var(--signal-fill, var(--spruce)); outline-offset: 3px; }
@media (max-width: 720px) { .to-top { width: 46px; height: 46px; } }
@media print { .to-top { display: none !important; } }
@media (prefers-reduced-motion: reduce) { .to-top { transition: opacity 0.2s ease; transform: none; } }