:root {
  --paper: #f6f8ff;
  --surface: #ffffff;
  --ink: #141b33;
  --muted: #56607a;
  --rule: #d5dcef;
  --track: #e3e8f7;
  --c1: #2f6bff;
  --c2: #ff5a79;
  --c3: #00b389;
  --c4: #ff9a1f;
  --c5: #8b5cf6;
  --c6: #00a8d6;
  --l1: var(--c6);
  --l2: var(--c5);
  --l3: var(--c1);
  --l4: var(--c3);
  --l5: var(--c4);
  --accent: #2f6bff;
  --focus: #ff9a1f;
  --display: Arimo, Arial, "Helvetica Neue", sans-serif;
  --body: Arimo, Arial, "Helvetica Neue", sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1426;
    --surface: #161d35;
    --ink: #e8ecfa;
    --muted: #9aa4c4;
    --rule: #2a3355;
    --track: #1f2745;
    --c1: #6b95ff;
    --c2: #ff7d96;
    --c3: #2fd4a8;
    --c4: #ffb04d;
    --c5: #a98bff;
    --c6: #3cc8ee;
    --l1: var(--c6);
    --l2: var(--c5);
    --l3: var(--c1);
    --l4: var(--c3);
    --l5: var(--c4);
    --accent: #6b95ff;
    --focus: #ffb04d;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --paper: #0f1426;
  --surface: #161d35;
  --ink: #e8ecfa;
  --muted: #9aa4c4;
  --rule: #2a3355;
  --track: #1f2745;
  --c1: #6b95ff;
  --c2: #ff7d96;
  --c3: #2fd4a8;
  --c4: #ffb04d;
  --c5: #a98bff;
  --c6: #3cc8ee;
  --l1: var(--c6);
  --l2: var(--c5);
  --l3: var(--c1);
  --l4: var(--c3);
  --l5: var(--c4);
  --accent: #6b95ff;
  --focus: #ffb04d;
  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.55;
  overflow-x: hidden;
}

a { color: inherit; text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

.skip {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--ink);
  color: var(--paper);
  padding: .5rem .75rem;
  z-index: 10;
}
.skip:focus { top: 1rem; }

.wrap, .wrap-wide {
  width: 100%;
  padding-inline: clamp(16px, 5vw, 6rem);
}

h1, h2, h3, h4 { font-family: var(--display); line-height: 1.1; margin: 0; }

.hero { position: relative; padding-block: 4.5rem 3.5rem; }

.lang-switch {
  position: absolute;
  top: 1.25rem;
  right: clamp(16px, 5vw, 6rem);
  z-index: 2;
}
.lang-switch a {
  display: inline-block;
  padding: .35rem .85rem;
  border: 2px solid var(--c1);
  border-radius: 999px;
  color: var(--c1);
  font-weight: 700;
  font-size: .95rem;
  text-decoration: none;
  background: var(--surface);
}
.lang-switch a:hover { background: var(--c1); color: var(--surface); }

.kicker {
  margin: 0 0 .75rem;
  color: var(--muted);
  font-weight: 500;
}

.hero-top {
  display: grid;
  gap: 2rem;
  align-items: center;
}
@media (min-width: 800px) {
  .hero-top { grid-template-columns: 1fr auto; gap: 4rem; }
}
@media (max-width: 799px) {
  .photo { order: -1; }
}
.photo {
  width: clamp(9rem, 22vw, 16rem);
  height: auto;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
  border: 6px solid var(--surface);
  box-shadow: 0 0 0 3px var(--c1), 14px 14px 0 3px var(--c4);
}

h1 {
  font-size: clamp(2.75rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: .95;
  color: var(--ink);
}

.lede {
  max-width: 44em;
  margin: 1.5rem 0 0;
  font-size: clamp(1.125rem, 2.2vw, 1.3rem);
  line-height: 1.5;
}

.strata { margin: 3.5rem 0 0; }

.chart { position: relative; }
.gridlines { position: absolute; inset: 0 0 1.5rem 0; pointer-events: none; }
.gridlines span {
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc((var(--at) - 2001) * 4%);
  border-left: 1px dashed var(--rule);
}
.strata-rows { position: relative; display: grid; gap: 1.1rem; }

.layer {
  --pos: calc((var(--from) - 2001) * 4%);
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  column-gap: 1rem;
  padding-bottom: 1.1rem;
}

.layer::before, .layer::after {
  content: "";
  position: absolute;
  bottom: 0;
  height: .75rem;
  border-radius: 999px;
}
.layer::before { left: 0; right: 0; background: var(--track); opacity: .6; }
.layer::after {
  left: var(--pos);
  right: 0;
  background: var(--c);
  transform-origin: left center;
  animation: grow .9s cubic-bezier(.2, .7, .2, 1) both;
}

.l1 { --c: var(--l1); }
.l2 { --c: var(--l2); }
.l3 { --c: var(--l3); }
.l4 { --c: var(--l4); }
.l5 { --c: var(--l5); }
.l1::after { animation-delay: .1s; }
.l2::after { animation-delay: .3s; }
.l3::after { animation-delay: .5s; }
.l4::after { animation-delay: .7s; }
.l5::after { animation-delay: .9s; }

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

.layer-name, .layer-since {
  position: relative;
  justify-self: start;
  background: var(--paper);
  padding-right: .5rem;
}
.layer-since { justify-self: end; padding: 0 0 0 .5rem; }
.layer-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.05rem;
}
.layer-name em {
  display: block;
  font-family: var(--body);
  font-style: normal;
  font-weight: 400;
  font-size: .9rem;
  color: var(--muted);
}
.layer-since {
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  color: var(--c);
  font-size: .95rem;
  text-align: right;
  white-space: nowrap;
}
.layer-since small {
  display: block;
  font-weight: 400;
  font-size: .8rem;
  color: var(--muted);
}

.axis {
  position: relative;
  height: 1.5rem;
  margin-top: .5rem;
  font-size: .8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.axis span {
  position: absolute;
  left: calc((var(--at) - 2001) * 4%);
  transform: translateX(-50%);
}
.axis span:first-child { transform: none; }
.axis span:last-child { transform: translateX(-100%); }

@media (max-width: 560px) {
  .axis span:nth-child(3), .axis span:nth-child(5) { display: none; }
}

.strata figcaption {
  margin-top: .75rem;
  color: var(--muted);
  font-size: .95rem;
}

main section { padding-block: 4rem; border-top: 1px solid var(--rule); }
main section:nth-of-type(even) { background: var(--surface); }

h2 {
  font-size: clamp(1.75rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 1.5rem;
}

.section-note { color: var(--muted); margin: -.75rem 0 2rem; }

.role + .role { margin-top: 3rem; padding-top: 2.5rem; border-top: 1px dashed var(--rule); }

.role-head { margin-bottom: 1rem; }
.role h3 { font-size: 1.45rem; font-weight: 600; letter-spacing: -.01em; }
.role-meta { margin: .35rem 0 0; color: var(--muted); display: flex; flex-wrap: wrap; gap: .25rem 1rem; }
.dates { font-variant-numeric: tabular-nums; }

.role > p { max-width: 60em; }

.groups {
  display: grid;
  gap: 1.75rem 2.5rem;
  margin: 2rem 0;
}
@media (min-width: 720px) {
  .groups { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1200px) {
  .groups { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1700px) {
  .role > .groups { grid-template-columns: repeat(4, 1fr); }
}

.group:nth-child(6n+1), .skill-group:nth-child(6n+1) { --g: var(--c1); }
.group:nth-child(6n+2), .skill-group:nth-child(6n+2) { --g: var(--c2); }
.group:nth-child(6n+3), .skill-group:nth-child(6n+3) { --g: var(--c3); }
.group:nth-child(6n+4), .skill-group:nth-child(6n+4) { --g: var(--c4); }
.group:nth-child(6n+5), .skill-group:nth-child(6n+5) { --g: var(--c5); }
.group:nth-child(6n+6), .skill-group:nth-child(6n+6) { --g: var(--c6); }

.group h4 {
  font-size: 1.05rem;
  font-weight: 600;
  padding-bottom: .4rem;
  margin-bottom: .6rem;
  border-bottom: 3px solid var(--g, var(--accent));
  display: inline-block;
}
.group ul, .h-body ul { margin: 0; padding-left: 1.1rem; }
.group li, .h-body li { margin-bottom: .4rem; }
.group li::marker { color: var(--g, var(--muted)); }
.h-body li::marker { color: var(--muted); }

.tools { color: var(--muted); font-size: .95rem; margin: 1rem 0 0; }
.tools span { color: var(--ink); font-weight: 600; margin-right: .35rem; }

.skill-groups {
  display: grid;
  gap: 2.25rem 3rem;
}
@media (min-width: 720px) {
  .skill-groups { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1100px) {
  .skill-groups { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1600px) {
  .skill-groups { grid-template-columns: repeat(4, 1fr); }
}

.skill-group h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: .75rem; color: var(--g); }

.bars { margin: 0; display: grid; gap: .35rem; }
.bars > div {
  display: grid;
  grid-template-columns: minmax(8.5rem, 42%) 1fr auto;
  align-items: center;
  gap: .75rem;
  font-size: .95rem;
}
.bars > div::after {
  content: "";
  grid-column: 2;
  grid-row: 1;
  height: .5rem;
  width: calc(var(--y) / 25 * 100%);
  background: var(--g, var(--accent));
  border-radius: 999px;
}
.bars dt { grid-column: 1; }
.bars dd {
  grid-column: 3;
  margin: 0;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: .85rem;
  min-width: 3.2rem;
  text-align: right;
}

.history { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--rule); }
.history > li { border-bottom: 1px solid var(--rule); }

.history summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 7rem 1fr auto;
  gap: .25rem 1.25rem;
  align-items: baseline;
  padding: 1rem 2rem 1rem 0;
  position: relative;
}
.history summary::-webkit-details-marker { display: none; }
.history summary::after {
  content: "+";
  position: absolute;
  right: .25rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--display);
  font-size: 1.4rem;
  color: var(--muted);
  transition: transform .2s ease;
}
.history details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.history summary:hover .h-title { color: var(--accent); }

.h-dates { color: var(--muted); font-variant-numeric: tabular-nums; font-size: .95rem; }
.h-title { font-family: var(--display); font-weight: 600; font-size: 1.1rem; line-height: 1.25; }
.h-role { color: var(--muted); font-size: .95rem; text-align: right; }

@media (max-width: 639px) {
  .history summary { grid-template-columns: 1fr; }
  .h-role { text-align: left; }
}

.h-body { padding: 0 0 1.5rem 8.25rem; }
.h-body > p, .h-body > ul { max-width: 60em; }
.h-body p { margin: 0 0 .75rem; }
.h-body .tools { margin-top: .75rem; }
@media (max-width: 639px) {
  .h-body { padding-left: 0; }
}

footer {
  padding-block: 3.5rem 5rem;
  border-top: 1px solid var(--rule);
}
.contacts {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .6rem;
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 700;
}
.langs { color: var(--muted); margin: 0 0 .35rem; }

.also { margin: .75rem 0 0; color: var(--muted); font-size: .9rem; }

@media (min-width: 800px) and (min-height: 600px) {
  html { scroll-snap-type: y proximity; }
  .hero, main section { scroll-snap-align: start; }
  footer { scroll-snap-align: end; }
  .hero {
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .layer::after { animation: none; }
  .history summary::after { transition: none; }
}

@media print {
  .skip, .strata { display: none; }
  body { background: #fff; color: #000; }
  details > .h-body { display: block; }
}