/* ONICO
   Bright editorial: near white, ink, electric cobalt, citron. System fonts only, no external requests. */

:root {
  --paper: #fbfbf9;
  --white: #ffffff;
  --ink: #0c0c0e;
  --ink-2: #3b3b41;
  --mute: #5c5c63;
  --cobalt: #1f3dff;
  --citron: #e3ff3c;

  --rule: 2px solid var(--ink);
  --sans: "Helvetica Neue", Helvetica, Arial, "Nimbus Sans", "Liberation Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --max: 1520px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base */

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

html {
  background: var(--paper);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html[data-motion="playing"] {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
p,
ol,
ul {
  margin: 0;
}

ol,
ul {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--cobalt);
  outline-offset: 3px;
}

#main:focus {
  outline: none;
}

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.cobalt {
  color: var(--cobalt);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -10rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

.label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.label::before {
  content: "";
  width: 0.7em;
  height: 0.7em;
  background: var(--cobalt);
  flex: none;
}

/* Header */

.site-header {
  border-bottom: var(--rule);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  padding-block: 0.9rem;
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.12em;
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
  text-decoration: none;
}

.wordmark::after {
  content: "";
  width: 0.36em;
  height: 0.36em;
  background: var(--cobalt);
}

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 2.25rem;
  padding: 0.35rem 0.7rem;
  border: var(--rule);
  background: transparent;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
}

.motion-toggle:hover {
  background: var(--citron);
}

.motion-icon {
  width: 0.7rem;
  height: 0.75rem;
  border-left: 3px solid currentColor;
  border-right: 3px solid currentColor;
}

html[data-motion="paused"] .motion-icon {
  border: 0;
  border-left: 0.7rem solid currentColor;
  border-top: 0.375rem solid transparent;
  border-bottom: 0.375rem solid transparent;
  width: 0;
  height: 0;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.25rem;
}

.site-nav a {
  display: inline-block;
  padding-block: 0.3rem;
  font-weight: 700;
  text-decoration: underline 2px transparent;
  text-underline-offset: 0.3em;
  transition: text-decoration-color 0.2s;
}

.site-nav a:hover {
  text-decoration-color: var(--ink);
}

.site-nav .nav-contact {
  padding: 0.35rem 0.85rem;
  border: var(--rule);
  background: var(--citron);
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
}

.site-nav .nav-contact:hover {
  background: var(--ink);
  color: var(--citron);
}

@media (max-width: 559px) {
  .motion-toggle {
    margin-left: auto;
  }

  .site-nav {
    flex: 1 0 100%;
    margin-left: 0;
  }

  .site-nav ul {
    justify-content: space-between;
  }
}

/* Hero */

.hero {
  padding-block: clamp(1.25rem, 3vw, 2.5rem) clamp(3rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink);
}

.status-dot {
  width: 0.65rem;
  height: 0.65rem;
  background: var(--citron);
  border: 2px solid var(--ink);
}

.display {
  font-size: clamp(2.6rem, 11.4vw, 7.5rem);
  font-weight: 700;
  line-height: 0.88;
  letter-spacing: -0.045em;
  text-transform: uppercase;
  overflow-wrap: break-word;
}

.line {
  display: block;
  overflow: visible;
  padding-block: 0.06em 0.04em;
  margin-block: -0.03em;
}

.line-in {
  display: inline-block;
}

.line--indent {
  padding-left: 0.9em;
}

.line--cobalt {
  color: var(--cobalt);
}

.hl {
  position: relative;
  z-index: 0;
  padding-inline: 0.06em;
}

.hl::before {
  content: "";
  position: absolute;
  inset: 0.06em -0.04em 0.02em;
  z-index: -1;
  background: var(--citron);
  transform-origin: 0 50%;
}

.lead {
  max-width: 34rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  font-size: clamp(1.125rem, 1.5vw, 1.3125rem);
  line-height: 1.45;
  color: var(--ink-2);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.5rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.2rem;
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
  transition: background-color 0.2s;
}

.btn:hover {
  background: var(--cobalt);
}

.btn-arrow,
.work-arrow,
.mail-arrow {
  display: inline-block;
  transition: transform 0.35s var(--ease);
}

.btn:hover .btn-arrow {
  transform: translateY(0.2em);
}

.text-link {
  font-weight: 700;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25em;
  overflow-wrap: anywhere;
}

.text-link:hover {
  color: var(--cobalt);
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(2rem, 4vw, 4.5rem);
    align-items: start;
  }

  .hero-meta {
    grid-column: 1 / -1;
  }

  .display {
    font-size: clamp(4.5rem, 7.6vw, 9.5rem);
  }
}

/* Diagram */

.dg {
  margin: 0;
  border: var(--rule);
  background: var(--white);
}

.dg-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 0.6rem 0.9rem;
  border-bottom: var(--rule);
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dg-head p:last-child {
  color: var(--mute);
}

.dg-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  background: var(--ink);
  border-bottom: var(--rule);
}

.dg-modes button {
  flex: 1 1 auto;
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.75rem 0.9rem;
  border: 0;
  background: var(--white);
  font-size: 1.0625rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.dg-modes button:hover {
  background: var(--citron);
}

.dg-modes button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--white);
}

.dg-modes button:focus-visible {
  outline-offset: -5px;
  outline-color: var(--cobalt);
}

.dg-modes button[aria-pressed="true"]:focus-visible {
  outline-color: var(--citron);
}

.dg-num {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--mute);
}

.dg-modes button[aria-pressed="true"] .dg-num {
  color: var(--citron);
}

.no-js .dg-modes,
.no-js .motion-toggle {
  display: none;
}

.dg-svg {
  display: block;
  width: 100%;
  height: auto;
}

.dg-caption {
  min-height: 4.6em;
  padding: 0.8rem 0.9rem;
  border-top: var(--rule);
  font-size: 1rem;
  line-height: 1.45;
}

.dg-frame {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2;
}

.dg[data-mode="systems"] .dg-frame {
  stroke-dasharray: 8 6;
}

.dg[data-mode="automation"] .dg-frame {
  stroke: var(--cobalt);
  stroke-dasharray: 2 8;
  stroke-linecap: round;
}

.dg-tag {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  fill: var(--cobalt);
  transition: opacity 0.18s;
}

.dg-link {
  fill: none;
  stroke: var(--cobalt);
  stroke-width: 3;
  stroke-linejoin: miter;
}

#dg-arrow path {
  fill: var(--cobalt);
}

.dg-node rect {
  fill: var(--white);
  stroke: var(--ink);
  stroke-width: 2;
  transition: fill 0.25s;
}

.dg-node.is-hit rect {
  fill: var(--citron);
}

.dg-node text,
.dg-src text {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  fill: var(--ink);
  dominant-baseline: central;
  transition: opacity 0.18s;
}

.dg.is-swapping .dg-node text,
.dg.is-swapping .dg-tag {
  opacity: 0;
}

.dg-src rect {
  fill: var(--citron);
  stroke: var(--ink);
  stroke-width: 2;
}

.dg-src text {
  font-size: 15px;
  font-weight: 700;
}

.dg-packet {
  fill: var(--ink);
}

.dg[data-mode="automation"] .dg-packet {
  fill: var(--citron);
  stroke: var(--ink);
  stroke-width: 2;
}

.dg-node,
.dg-src {
  transform-box: fill-box;
  transform-origin: 50% 50%;
}

@media (max-width: 639px) {
  .dg-node text {
    font-size: 19px;
  }

  .dg-src text {
    font-size: 21px;
  }

  .dg-tag {
    font-size: 17px;
  }
}

/* Scroll band: the wordmark assembles as it scrolls into view */

.band {
  overflow: hidden;
  overflow-x: clip;
  overflow-y: visible;
  padding-block: clamp(1.5rem, 5vw, 4rem);
  border-top: var(--rule);
  border-bottom: var(--rule);
}

.band-word {
  position: relative;
  isolation: isolate;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  font-size: clamp(4.5rem, 24vw, 22rem);
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.06em;
}

.band-bar {
  position: absolute;
  left: var(--gutter);
  right: var(--gutter);
  bottom: 0.04em;
  height: 0.24em;
  z-index: -1;
  background: var(--citron);
  transform: scaleX(var(--p, 1));
  transform-origin: 0 50%;
}

.bl {
  display: inline-block;
  transform:
    translate(calc((1 - var(--p, 1)) * var(--dx)), calc((1 - var(--p, 1)) * var(--dy)))
    rotate(calc((1 - var(--p, 1)) * var(--r)));
}

.bl--cobalt {
  color: var(--cobalt);
}

html[data-motion="paused"] .band {
  --p: 1 !important;
}

/* Sections */

.section {
  padding-block: clamp(4rem, 10vw, 8.5rem);
}

.h2 {
  font-size: clamp(2.25rem, 5.4vw, 5rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.body-lg {
  max-width: 40rem;
  font-size: clamp(1.0625rem, 1.4vw, 1.25rem);
  color: var(--ink-2);
}

/* Practice */

.practice-grid {
  display: grid;
  gap: 2rem;
}

.practice-side {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.big-arrow {
  width: clamp(4.5rem, 14vw, 13rem);
  height: auto;
  flex: none;
  overflow: visible;
}

.big-arrow path {
  fill: none;
  stroke: var(--cobalt);
  stroke-width: 12;
  stroke-linecap: square;
}

.practice-main {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.25rem);
}

.steps {
  margin-top: clamp(1rem, 3vw, 2rem);
  border-bottom: var(--rule);
}

.step {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 0.25rem 1rem;
  padding-block: 1.25rem;
  border-top: var(--rule);
}

.step-num {
  font-family: var(--mono);
  font-size: 0.875rem;
  padding-top: 0.45em;
  transition: color 0.2s;
}

.step h3 {
  font-size: clamp(1.625rem, 2.6vw, 2.25rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  transition: transform 0.35s var(--ease);
}

.step p {
  grid-column: 2;
  max-width: 34rem;
  color: var(--ink-2);
}

.step:hover .step-num {
  color: var(--cobalt);
}

.step:hover h3 {
  transform: translateX(0.2em);
}

@media (min-width: 900px) {
  .practice-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: clamp(2rem, 4vw, 4rem);
  }

  .practice-side {
    flex-direction: column;
    justify-content: flex-start;
    gap: 2.5rem;
  }

  .step {
    grid-template-columns: 4rem minmax(9rem, 14rem) minmax(0, 1fr);
    align-items: baseline;
  }

  .step p {
    grid-column: 3;
  }
}

/* Work */

.work {
  padding-top: 0;
}

.work-head {
  display: grid;
  gap: 1.25rem;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.work-intro {
  max-width: 34rem;
  color: var(--ink-2);
}

.works {
  border-bottom: var(--rule);
}

.work-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  padding-block: clamp(1.25rem, 3vw, 2rem);
  border-top: var(--rule);
}

.work-num {
  font-family: var(--mono);
  font-size: 0.875rem;
}

.work-name {
  font-size: clamp(2.25rem, 7vw, 6.25rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.045em;
  overflow-wrap: break-word;
  transition: color 0.25s, transform 0.4s var(--ease);
}

.work-arrow {
  color: var(--cobalt);
  font-size: 0.6em;
  vertical-align: 0.2em;
  opacity: 0;
  transform: translateX(-0.4em);
  transition: opacity 0.25s, transform 0.4s var(--ease);
}

.work-meta {
  display: grid;
  gap: 0.75rem;
  justify-items: start;
  max-width: 26rem;
  color: var(--ink-2);
}

.tag {
  padding: 0.2rem 0.55rem;
  border: var(--rule);
  background: var(--citron);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.tag--line {
  background: transparent;
}

.work-row:hover .work-name {
  transform: translateX(0.08em);
}

.work-row:hover .work-arrow {
  opacity: 1;
  transform: none;
}

@media (min-width: 900px) {
  .work-head {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: clamp(2rem, 4vw, 4rem);
    align-items: start;
  }

  .work-intro {
    grid-column: 2;
  }

  .work-row {
    grid-template-columns: 4rem minmax(0, 1fr) minmax(14rem, 22rem);
    column-gap: clamp(1rem, 3vw, 3rem);
    align-items: end;
  }

  .work-num {
    align-self: start;
    padding-top: 0.5rem;
  }
}

/* Contact */

.contact {
  background: var(--cobalt);
  color: var(--white);
}

.contact-inner {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding-block: clamp(4rem, 10vw, 8rem);
}

.label--citron {
  color: var(--citron);
}

.label--citron::before {
  background: var(--citron);
}

.contact-title {
  max-width: 14ch;
  font-size: clamp(2.5rem, 8vw, 8rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.045em;
}

.contact-note {
  max-width: 34rem;
}

.contact-mail {
  margin-top: clamp(0.5rem, 2vw, 1.5rem);
}

.mail {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25em;
  max-width: 100%;
  font-size: clamp(1.25rem, 5.6vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  text-decoration: none;
}

.mail-text {
  overflow-wrap: anywhere;
  border-bottom: 0.08em solid var(--citron);
  transition: color 0.2s;
}

.mail-arrow {
  color: var(--citron);
}

.mail:hover .mail-text {
  color: var(--citron);
}

.mail:hover .mail-arrow {
  transform: translateX(0.2em);
}

.contact :focus-visible {
  outline-color: var(--citron);
}

/* Footer */

.site-footer {
  border-top: var(--rule);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.5rem 2rem;
}

.footer-mark {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.05em;
}

.footer-copy {
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--mute);
}

.footer-top {
  font-weight: 700;
  text-underline-offset: 0.25em;
}

/* Motion. Everything below runs only while data-motion="playing".
   Intro rules stop for good once JS adds .intro-done, so resuming never replays them. */

@keyframes rise {
  from { transform: translateX(-0.06em); }
  to { transform: none; }
}

@keyframes wipe {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@keyframes fade-up {
  from { opacity: 0.8; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@keyframes draw {
  from { stroke-dashoffset: 1; }
  to { stroke-dashoffset: 0; }
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(6px, 6px); }
}

@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(0.18em); }
}

html.js[data-motion="playing"]:not(.intro-done) .line-in {
  animation: rise 1s var(--ease) both;
  animation-delay: calc(var(--i, 0) * 110ms + 60ms);
}

html.js[data-motion="playing"]:not(.intro-done) .hl::before {
  animation: wipe 0.8s var(--ease) 0.55s both;
}

html.js[data-motion="playing"]:not(.intro-done) .lead,
html.js[data-motion="playing"]:not(.intro-done) .hero-actions {
  animation: fade-up 0.9s var(--ease) 0.5s both;
}

html.js[data-motion="playing"]:not(.intro-done) .dg-link {
  stroke-dasharray: 1;
  animation: draw 1.1s var(--ease) both;
  animation-delay: calc(var(--i, 0) * 90ms + 0.5s);
}

html.js[data-motion="playing"]:not(.intro-done) .dg-node {
  animation: fade-up 0.7s var(--ease) both;
  animation-delay: calc(var(--i, 0) * 90ms + 0.9s);
}

html.js[data-motion="playing"] .big-arrow {
  animation: drift 3s ease-in-out infinite;
}

html.js[data-motion="playing"] .mail-arrow {
  animation: nudge 2.4s ease-in-out infinite;
}

html.js[data-motion="playing"] .mail:hover .mail-arrow {
  animation: none;
}

html.js[data-motion="playing"] [data-reveal] {
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: var(--d, 0s);
}

html.js[data-motion="playing"] .is-pending {
  opacity: 0;
  transform: translateY(1.5rem);
}

/* Paused, by choice or by reduced-motion preference: no animation or transition anywhere. */

html[data-motion="paused"] *,
html[data-motion="paused"] *::before,
html[data-motion="paused"] *::after {
  animation: none !important;
  transition: none !important;
  scroll-behavior: auto !important;
}

@media print {
  .motion-toggle,
  .dg-modes,
  .band {
    display: none;
  }

  .is-pending {
    opacity: 1 !important;
    transform: none !important;
  }
}