/* Midhun Rajeev portfolio: "engineer's drawing" theme.
   Light = vellum drafting paper, dark = cyanotype blueprint. */

@font-face {
  font-family: 'Archivo';
  src: url('../fonts/archivo-wdth.woff2') format('woff2');
  font-weight: 100 900;
  font-stretch: 62% 125%;
  font-display: swap;
}

@font-face {
  font-family: 'Osifont';
  src: url('../fonts/osifont.woff2') format('woff2');
  font-display: swap;
}

:root {
  --paper: #edf1ef;
  --paper-raised: #f7f9f8;
  --ink: #14365e;
  --ink-2: #4c627a;
  --rule: rgba(20, 54, 94, 0.5);
  --rule-faint: rgba(20, 54, 94, 0.16);
  --grid-minor: rgba(20, 54, 94, 0.03);
  --grid-major: rgba(20, 54, 94, 0.065);
  --redline: #c3362b;
  --on-ink: #f7f9f8;
  --duotone: url('#duo-light');

  --font-text: 'Archivo', 'Segoe UI', system-ui, sans-serif;
  --font-letter: 'Osifont', 'Archivo', 'Segoe UI', sans-serif;

  --step--1: 0.84rem;
  --step-0: 1.0625rem;
  --step-1: 1.33rem;
  --step-2: 1.77rem;
  --step-3: clamp(1.9rem, 3.2vw, 2.4rem);
  --step-name: clamp(3rem, 8.4vw, 6.4rem);

  --lw-thick: 2px;
  --lw: 1px;
  --gutter: clamp(16px, 4vw, 56px);
  --frame-inset: 12px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --title-block-width: 264px;
  --measure: 64ch;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --paper: #113764;
    --paper-raised: #15406f;
    --ink: #eaf2fa;
    --ink-2: #a8c2dc;
    --rule: rgba(234, 242, 250, 0.5);
    --rule-faint: rgba(234, 242, 250, 0.16);
    --grid-minor: rgba(234, 242, 250, 0.028);
    --grid-major: rgba(234, 242, 250, 0.06);
    --redline: #ffc24b;
    --on-ink: #113764;
    --duotone: url('#duo-dark');
    color-scheme: dark;
  }
}

:root[data-theme='dark'] {
  --paper: #113764;
  --paper-raised: #15406f;
  --ink: #eaf2fa;
  --ink-2: #a8c2dc;
  --rule: rgba(234, 242, 250, 0.5);
  --rule-faint: rgba(234, 242, 250, 0.16);
  --grid-minor: rgba(234, 242, 250, 0.028);
  --grid-major: rgba(234, 242, 250, 0.06);
  --redline: #ffc24b;
  --on-ink: #113764;
  --duotone: url('#duo-dark');
  color-scheme: dark;
}

/* ---------- Base ---------- */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px;
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--step-0);
  font-stretch: 100%;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
video { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--redline); }

:focus-visible {
  outline: 2px solid var(--redline);
  outline-offset: 3px;
}

h1, h2, h3 { margin: 0; font-weight: 400; line-height: 1.1; }
p { margin: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%);
  white-space: nowrap;
}

.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 100;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--on-ink);
}
.skip-link:focus { top: 16px; }

.noscript { padding: 2rem var(--gutter); }

/* ---------- Drawing frame and title block ---------- */

.sheet-frame {
  position: fixed;
  inset: var(--frame-inset);
  border: var(--lw) solid var(--rule);
  outline: var(--lw-thick) solid var(--ink);
  outline-offset: -8px;
  pointer-events: none;
  z-index: 5;
}

.sheet-frame__zones {
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-letter);
  font-size: 0.7rem;
  color: var(--ink-2);
}

.sheet-frame__zones li {
  flex: 1;
  text-align: center;
  border-left: var(--lw) solid var(--rule-faint);
  line-height: 8px;
  height: 8px;
  overflow: hidden;
}
.sheet-frame__zones li:first-child { border-left: 0; }

.title-block {
  position: fixed;
  right: calc(var(--frame-inset) + 8px);
  bottom: calc(var(--frame-inset) + 8px);
  z-index: 20;
  width: var(--title-block-width);
  display: grid;
  background: var(--paper-raised);
  border: var(--lw-thick) solid var(--ink);
  font-family: var(--font-letter);
  font-size: 0.84rem;
}

.title-block > * { padding: 0.28rem 0.65rem; border-bottom: var(--lw) solid var(--rule); }
.title-block > *:last-child { border-bottom: 0; }

.title-block__name {
  font-family: var(--font-text);
  font-stretch: 125%;
  font-weight: 450;
  font-size: 0.98rem;
  text-decoration: none;
}

.title-block__role { color: var(--ink-2); }

.title-block__nav ol { margin: 0; padding: 0; list-style: none; }
.title-block__nav li + li { margin-top: 0.1rem; }
.title-block__nav a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  text-decoration: none;
  color: var(--ink-2);
}
.title-block__nav a:hover,
.title-block__nav a[aria-current='true'] { color: var(--ink); }
.title-block__nav a[aria-current='true']::after {
  content: '△';
  color: var(--redline);
  margin-left: auto;
  font-size: 0.8rem;
}

.title-block__no {
  display: inline-grid;
  place-items: center;
  width: 1.3rem;
  height: 1.3rem;
  border: var(--lw) solid var(--rule);
  font-size: 0.8rem;
}
.title-block__nav a[aria-current='true'] .title-block__no { border-color: var(--ink); background: var(--ink); color: var(--on-ink); }

.title-block__meta { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.title-block__sheet { color: var(--ink-2); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.2rem 0.1rem;
  border: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.theme-toggle__track {
  position: relative;
  width: 2rem;
  height: 1rem;
  border: var(--lw) solid var(--ink);
}
.theme-toggle__thumb {
  position: absolute;
  top: 1px;
  left: 1px;
  width: calc(1rem - 4px);
  height: calc(1rem - 4px);
  background: var(--ink);
  transition: transform 160ms ease;
}
.theme-toggle[aria-pressed='true'] .theme-toggle__thumb { transform: translateX(1rem); }

/* ---------- Sheets ---------- */

main {
  padding-right: calc(var(--title-block-width) + var(--frame-inset) + 24px);
}

.sheet {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(96px, 13vw, 168px) var(--gutter);
  border-bottom: var(--lw) dashed var(--rule-faint);
}
.sheet:last-of-type { border-bottom: 0; }

.sheet__title {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-size: var(--step-3);
  font-stretch: 118%;
  font-weight: 380;
  letter-spacing: -0.01em;
}

.sheet__no {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 2.2rem;
  height: 2.2rem;
  border: var(--lw-thick) solid var(--ink);
  font-family: var(--font-letter);
  font-size: 1.15rem;
  letter-spacing: 0;
}

.sheet__lede {
  margin-top: 0.9rem;
  max-width: var(--measure);
  color: var(--ink-2);
}

/* ---------- Buttons ---------- */

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.55rem 1.1rem;
  border: var(--lw) solid var(--ink);
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-stretch: 108%;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { background: var(--rule-faint); color: var(--ink); }
.button--primary { background: var(--ink); color: var(--on-ink); }
.button--primary:hover { background: var(--redline); border-color: var(--redline); color: var(--on-ink); }
.button--small { min-height: 36px; padding: 0.3rem 0.8rem; font-size: var(--step--1); }

/* ---------- Hero ---------- */

.sheet--hero {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  min-height: min(100vh, 920px);
  padding-top: clamp(56px, 8vw, 96px);
}

.hero__name {
  font-size: var(--step-name);
  font-stretch: 125%;
  font-weight: 260;
  line-height: 0.92;
  letter-spacing: -0.02em;
}
.hero__name span { display: block; }

.hero__role {
  margin-top: 1.4rem;
  padding-top: 0.6rem;
  border-top: var(--lw) solid var(--rule);
  font-family: var(--font-letter);
  font-size: 1.05rem;
  color: var(--ink-2);
}

.hero__statement {
  margin-top: 1.4rem;
  max-width: 34ch;
  font-size: var(--step-1);
  line-height: 1.4;
}

.hero__next { margin-top: 1rem; max-width: 46ch; color: var(--ink-2); }

.hero__actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }

.drive { margin: 0; }

.drive__stage {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-height: 72vh;
  touch-action: pan-y;
  cursor: grab;
  border: var(--lw) solid var(--rule-faint);
}
.drive__stage:active { cursor: grabbing; }
.drive__stage canvas { position: absolute; inset: 0; width: 100% !important; height: 100% !important; }

.drive__callouts {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 1;
  opacity: 0;
  transition: opacity 700ms ease;
}
.drive__callouts.is-ready { opacity: 1; }
.drive__callouts line { stroke: var(--ink-2); stroke-width: 1; }
.drive__callouts circle { fill: var(--redline); }
.drive__callouts text {
  fill: var(--ink);
  font-family: var(--font-letter);
  font-size: 13px;
  paint-order: stroke;
  stroke: var(--paper);
  stroke-width: 5px;
  stroke-linejoin: round;
}

.drive__fallback { position: absolute; inset: 8%; width: 84%; height: 84%; }
.drive__fallback path,
.drive__fallback circle { fill: none; stroke: var(--ink); stroke-width: 0.4; }

.drive__readout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  border: var(--lw) solid var(--rule);
  border-top: 0;
  font-family: var(--font-letter);
}
.drive__readout div { padding: 0.45rem 0.8rem; border-left: var(--lw) solid var(--rule); }
.drive__readout div:first-child { border-left: 0; }
.drive__readout dt { font-size: 0.78rem; color: var(--ink-2); }
.drive__readout dd { margin: 0; font-size: 1.2rem; font-variant-numeric: tabular-nums; }

.drive__caption { margin-top: 0.7rem; font-size: var(--step--1); color: var(--ink-2); max-width: 60ch; }

/* ---------- About ---------- */

.about {
  display: grid;
  grid-template-columns: minmax(180px, 3fr) minmax(0, 7fr);
  gap: clamp(24px, 5vw, 72px);
  margin-top: 2.5rem;
  align-items: start;
}

.about__photo { margin: 0; }
.about__photo img {
  width: 100%;
  border: var(--lw) solid var(--ink);
  padding: 6px;
  background: var(--paper-raised);
}
.about__photo figcaption { margin-top: 0.5rem; font-family: var(--font-letter); font-size: 0.85rem; color: var(--ink-2); }

.about__notes-title {
  font-family: var(--font-letter);
  font-size: 1.1rem;
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.notes {
  margin: 1rem 0 0;
  padding-left: 1.6rem;
  max-width: var(--measure);
}
.notes li { padding-left: 0.4rem; }
.notes li + li { margin-top: 0.85rem; }
.notes li::marker { font-family: var(--font-letter); color: var(--ink-2); }

/* ---------- Experience timeline ---------- */

.timeline {
  --years: 12;
  position: relative;
  margin-top: 2.5rem;
  padding-bottom: 2.4rem;
}

.timeline__lane {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  align-items: center;
  min-height: 4.6rem;
  border-top: var(--lw) solid var(--rule-faint);
}
.timeline__lane-label { font-family: var(--font-letter); color: var(--ink-2); }
.timeline__track { position: relative; height: 4.6rem; }

.span {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  gap: 0.15rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  text-align: center;
  cursor: pointer;
}
.span__label { font-stretch: 110%; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.span__line {
  position: relative;
  height: 1px;
  background: var(--ink);
  margin: 0 1px;
}
.span__line::before,
.span__line::after {
  content: '';
  position: absolute;
  top: -4px;
  border: 4.5px solid transparent;
}
.span__line::before { left: -1px; border-right: 9px solid var(--ink); border-left: 0; }
.span__line::after { right: -1px; border-left: 9px solid var(--ink); border-right: 0; }
.span__dates { font-family: var(--font-letter); font-size: 0.78rem; color: var(--ink-2); white-space: nowrap; }
.span[aria-pressed='true'] .span__label { color: var(--redline); }
.span[aria-pressed='true'] .span__line { background: var(--redline); height: 2px; }
.span[aria-pressed='true'] .span__line::before { border-right-color: var(--redline); }
.span[aria-pressed='true'] .span__line::after { border-left-color: var(--redline); }
.span:hover .span__label { color: var(--redline); }

.timeline__scale {
  position: relative;
  margin-left: 6.5rem;
  height: 2rem;
  border-top: var(--lw) solid var(--ink);
  font-family: var(--font-letter);
  font-size: 0.78rem;
  color: var(--ink-2);
}
.timeline__tick { position: absolute; top: 0; transform: translateX(-50%); padding-top: 0.5rem; }
.timeline__tick::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  height: 6px;
  border-left: var(--lw) solid var(--ink);
}

.timeline-detail {
  max-width: 760px;
  padding: 1.4rem 1.6rem;
  border: var(--lw) solid var(--rule);
  border-left: var(--lw-thick) solid var(--redline);
  background: var(--paper-raised);
}
.timeline-detail h3 { font-size: var(--step-1); font-stretch: 112%; font-weight: 500; }
.timeline-detail__org { margin-top: 0.3rem; font-family: var(--font-letter); color: var(--ink-2); }
.timeline-detail ul { margin: 1rem 0 0; padding-left: 1.2rem; }
.timeline-detail li + li { margin-top: 0.5rem; }

/* ---------- Projects ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 2rem; }
.filter {
  min-height: 40px;
  padding: 0.35rem 0.85rem;
  border: var(--lw) solid var(--rule);
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
  cursor: pointer;
}
.filter:hover { border-color: var(--ink); }
.filter[aria-pressed='true'] { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.filter__count { font-family: var(--font-letter); margin-left: 0.35rem; opacity: 0.75; }

.filter-status { min-height: 1.6rem; margin-top: 0.8rem; color: var(--ink-2); }
.filter-status button {
  margin-left: 0.5rem;
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 270px), 1fr));
  gap: 2.6rem 1.8rem;
  margin-top: 1.4rem;
}

/* Projects are figures on the sheet: a matted, framed image with its caption set below. */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
}
.card[hidden] { display: none; }

@media (min-width: 900px) {
  .card--featured { grid-column: span 2; }
}

/* Fixed height (not aspect ratio) so double-width featured figures line up with their row. */
.card__media {
  position: relative;
  height: clamp(180px, 16vw, 230px);
  padding: 7px;
  overflow: hidden;
  border: var(--lw) solid var(--rule);
  background: var(--paper-raised);
  transition: border-color 200ms ease;
}
.card:hover .card__media,
.card:focus-within .card__media { border-color: var(--ink); }
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: var(--duotone);
  transition: filter 260ms ease;
}
/* Portrait phone videos are shown whole, like a photo pinned to the sheet, instead of cropped. */
.card--portrait .card__media img { object-fit: contain; }
.card:hover .card__media img,
.card:focus-within .card__media img { filter: none; }

.card__blank {
  position: absolute;
  inset: 7px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(var(--rule-faint), var(--rule-faint)) center / 1px 100% no-repeat,
    linear-gradient(var(--rule-faint), var(--rule-faint)) center / 100% 1px no-repeat;
}
.card__blank span {
  display: grid;
  place-items: center;
  width: 5.5rem;
  height: 5.5rem;
  border: var(--lw-thick) solid var(--ink);
  border-radius: 50%;
  background: var(--paper-raised);
  font-family: var(--font-letter);
  font-size: 2.6rem;
}

.card__body { display: grid; gap: 0.4rem; padding: 0.95rem 0.15rem 0; }

.card__meta { display: flex; align-items: center; gap: 0.6rem; font-family: var(--font-letter); font-size: 0.85rem; color: var(--ink-2); }

.balloon {
  display: inline-grid;
  place-items: center;
  flex: none;
  width: 1.75rem;
  height: 1.75rem;
  border: var(--lw) solid var(--ink);
  border-radius: 50%;
  font-family: var(--font-letter);
  font-size: 0.95rem;
  color: var(--ink);
  line-height: 1;
}

.card__title { font-size: var(--step-1); font-stretch: 108%; font-weight: 480; line-height: 1.2; }
.card__open {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.card__open::after { content: ''; position: absolute; inset: 0; }
.card__open:focus-visible { outline: none; }
.card:has(.card__open:focus-visible) { outline: 2px solid var(--redline); outline-offset: 3px; }
.card__summary { color: var(--ink-2); }

/* ---------- Project dialog ---------- */

.project-dialog {
  width: min(980px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  padding: 0;
  border: var(--lw-thick) solid var(--ink);
  background: var(--paper-raised);
  color: var(--ink);
}
.project-dialog::backdrop { background: rgba(10, 30, 55, 0.55); }
.project-dialog[open] { animation: dialog-in 180ms ease-out; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(8px); } }

.dialog__head {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.9rem 1.2rem;
  border-bottom: var(--lw) solid var(--rule);
  background: var(--paper-raised);
}
.dialog__head .balloon { width: 2.4rem; height: 2.4rem; font-size: 1.3rem; }
.dialog__title { font-size: var(--step-2); font-stretch: 110%; font-weight: 420; }
.dialog__group { font-family: var(--font-letter); font-size: 0.85rem; color: var(--ink-2); }
.dialog__close { margin-left: auto; }

.dialog__content {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 1.6rem;
  padding: 1.2rem;
}
.dialog__content--text { grid-template-columns: minmax(0, 1fr); max-width: 72ch; }

.viewer__main {
  display: grid;
  place-items: center;
  border: var(--lw) solid var(--rule);
  background: var(--paper);
  min-height: 220px;
}
.viewer__main img,
.viewer__main video { width: 100%; max-height: 62vh; object-fit: contain; }
.viewer__caption { margin-top: 0.5rem; font-family: var(--font-letter); font-size: 0.85rem; color: var(--ink-2); }
.viewer__thumbs { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.8rem; }
.viewer__thumb {
  width: 84px;
  height: 56px;
  padding: 0;
  border: var(--lw) solid var(--rule);
  background: var(--paper);
  cursor: pointer;
  overflow: hidden;
}
.viewer__thumb img { width: 100%; height: 100%; object-fit: cover; }
.viewer__thumb[aria-current='true'] { border: var(--lw-thick) solid var(--redline); }
.viewer__thumb--video { position: relative; }
.viewer__thumb--video::after {
  content: '▶';
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1rem;
  text-shadow: 0 0 4px rgba(0, 0, 0, 0.8);
}

.dialog__text p + p { margin-top: 0.9rem; }
.dialog__subhead { margin-top: 1.3rem; font-family: var(--font-letter); font-size: 0.95rem; color: var(--ink-2); }
.dialog__facts { margin: 0.4rem 0 0; padding-left: 1.1rem; }
.dialog__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0 0; padding: 0; list-style: none; }
.dialog__tags li { padding: 0.1rem 0.5rem; border: var(--lw) solid var(--rule); font-size: 0.85rem; }
.dialog__links { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.4rem; }

/* ---------- Skills bill of materials ---------- */

.bom-wrap { margin-top: 2rem; overflow-x: auto; border: var(--lw-thick) solid var(--ink); background: var(--paper-raised); }
.bom { width: 100%; border-collapse: collapse; }
.bom th,
.bom td { padding: 0.5rem 0.9rem; border: var(--lw) solid var(--rule); text-align: left; vertical-align: middle; }
.bom thead th { font-family: var(--font-letter); font-weight: 400; color: var(--ink-2); border-bottom: var(--lw-thick) solid var(--ink); }
.bom tbody th[scope='rowgroup'] {
  font-family: var(--font-letter);
  font-weight: 400;
  background: var(--paper);
  color: var(--ink-2);
}
.bom__item,
.bom__qty { width: 4.5rem; font-family: var(--font-letter); text-align: center !important; font-variant-numeric: tabular-nums; }
.bom__part button {
  padding: 0;
  border: 0;
  background: none;
  color: var(--ink);
  font: inherit;
  text-align: left;
  text-decoration: underline;
  text-decoration-color: var(--rule);
  text-underline-offset: 0.2em;
  cursor: pointer;
}
.bom__part button:hover { color: var(--redline); text-decoration-color: currentColor; }
.bom__used { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.bom__used button.balloon { background: none; cursor: pointer; padding: 0; }
.bom__used button.balloon:hover { background: var(--ink); color: var(--on-ink); }
.bom__role { font-family: var(--font-letter); font-size: 0.85rem; color: var(--ink-2); padding: 0 0.3rem; border: var(--lw) dashed var(--rule); }

/* ---------- Contact and footer ---------- */

.contact {
  margin-top: clamp(64px, 9vw, 112px);
  padding-top: 2rem;
  border-top: var(--lw-thick) solid var(--ink);
}
.contact__title { font-size: var(--step-3); font-stretch: 118%; font-weight: 380; }
.contact__lede { margin-top: 0.8rem; max-width: var(--measure); color: var(--ink-2); }
.contact__email { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1rem; margin-top: 1.6rem; }
.contact__email a {
  font-size: clamp(1.35rem, 3.6vw, 2.5rem);
  font-stretch: 122%;
  font-weight: 300;
  overflow-wrap: anywhere;
}
.copy-status { font-family: var(--font-letter); color: var(--ink-2); }
.contact__links { display: flex; flex-wrap: wrap; gap: 0.8rem 2rem; margin: 1.6rem 0 0; padding: 0; list-style: none; font-size: var(--step-1); }

.colophon {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.5rem var(--gutter) 3rem;
  padding-right: calc(var(--title-block-width) + var(--frame-inset) + 24px + var(--gutter));
  font-family: var(--font-letter);
  font-size: 0.85rem;
  color: var(--ink-2);
}

/* ---------- Motion: one orchestrated entrance, plus drawing-style reveals ---------- */

::selection { background: var(--ink); color: var(--on-ink); }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
}

.hero__name span,
.hero__role,
.hero__statement,
.hero__next,
.hero__actions,
.drive__readout,
.drive__caption { animation: rise 1000ms var(--ease-out) both; }
.hero__name span:nth-child(2) { animation-delay: 110ms; }
.hero__role { animation-delay: 360ms; }
.hero__statement { animation-delay: 480ms; }
.hero__next { animation-delay: 600ms; }
.hero__actions { animation-delay: 720ms; }
.drive__readout,
.drive__caption { animation-delay: 1900ms; }

/* Timeline dimension lines extend from their centre the first time the timeline scrolls into view.
   Hidden only under .will-draw, which the script adds itself, so the timeline shows if JS doesn't run. */
.timeline.will-draw .span__line {
  transition: transform 1100ms var(--ease-out) calc(var(--i, 0) * 170ms);
}
.timeline.will-draw .span__label,
.timeline.will-draw .span__dates {
  transition: opacity 600ms ease calc(var(--i, 0) * 170ms + 350ms), color 160ms ease;
}
.timeline.will-draw:not(.is-drawn) .span__line { transform: scaleX(0); }
.timeline.will-draw:not(.is-drawn) .span__label,
.timeline.will-draw:not(.is-drawn) .span__dates { opacity: 0; }

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  :root { --frame-inset: 6px; }
  main { padding-right: 0; }
  .colophon { padding-right: var(--gutter); }
  .sheet-frame__zones { display: none; }

  .title-block {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    grid-template-columns: 1fr auto;
    align-items: center;
    border-width: 0 0 var(--lw-thick);
  }
  .title-block > * { border-bottom: 0; }
  .title-block__role,
  .title-block__nav { display: none; }
  .title-block__meta { gap: 1rem; }
  html { scroll-padding-top: 64px; }
  .sheet--hero { padding-top: 96px; }
}

@media (max-width: 860px) {
  .sheet--hero { grid-template-columns: minmax(0, 1fr); min-height: 0; }
  .drive__stage { max-height: none; }
  .about { grid-template-columns: minmax(0, 1fr); }
  .about__photo { max-width: 260px; }
  .dialog__content { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .timeline { padding-bottom: 1.4rem; }
  .timeline__scale { display: none; }
  .timeline__lane { grid-template-columns: minmax(0, 1fr); padding: 0.9rem 0; }
  .timeline__track { display: grid; gap: 1rem; height: auto; margin-top: 0.6rem; }
  .timeline .span { position: static; transform: none; width: 100% !important; text-align: left; }
  .timeline .span__label { white-space: normal; }
  :root { --gutter: 22px; }
  .sheet-frame { outline: none; }
  .drive__callouts { display: none; }
  .title-block__sheet { display: none; }
  .bom__item { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
    animation-duration: 0.01ms !important;
    animation-delay: 0s !important;
  }
}

@media print {
  .title-block,
  .sheet-frame,
  .drive,
  .filters { display: none; }
  main { padding-right: 0; }
  body { background: #fff; color: #000; }
}