/* Fonts */
@font-face {
  font-family: "JetBrains Mono";
  src: url("../assets/fonts/jetbrains-mono-variable.woff2") format("woff2");
  font-weight: 100 800;
  font-style: normal;
  font-display: swap;
}

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

/* Base elements */
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-link);
}

a:focus-visible {
  outline: var(--line-width) solid currentColor;
  outline-offset: 2px;
}

h2 {
  margin: 0 0 var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-muted);
}

main p {
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
}

/* Glowing background: balls of light that bounce around the page and shift colour */
.glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.glow span {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--size);
  height: var(--size);
  translate: var(--sx) var(--sy);
  animation: breathe var(--breathe) ease-in-out infinite alternate;
}

.glow span::before,
.glow span::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

.glow span::before {
  background: radial-gradient(circle, var(--c1) 0%, transparent 68%);
  opacity: var(--glow-alpha);
  animation: shade-out var(--shift) ease-in-out infinite alternate;
}

.glow span::after {
  background: radial-gradient(circle, var(--c2) 0%, transparent 68%);
  opacity: 0;
  animation: shade-in var(--shift) ease-in-out infinite alternate;
}

.glow span:nth-child(1) {
  --size: 34vmax;
  --c1: var(--glow-1);
  --c2: var(--glow-2);
  --sx: 4vw;
  --sy: 6vh;
  --dx: 31s;
  --dy: 23s;
  --ox: -7s;
  --oy: -5s;
  --shift: 17s;
  --breathe: 11s;
}

.glow span:nth-child(2) {
  --size: 40vmax;
  --c1: var(--glow-2);
  --c2: var(--glow-3);
  --sx: 55vw;
  --sy: 8vh;
  --dx: 37s;
  --dy: 27s;
  --ox: -19s;
  --oy: -13s;
  --shift: 21s;
  --breathe: 13s;
}

.glow span:nth-child(3) {
  --size: 30vmax;
  --c1: var(--glow-3);
  --c2: var(--glow-4);
  --sx: 30vw;
  --sy: 40vh;
  --dx: 29s;
  --dy: 25s;
  --ox: -3s;
  --oy: -21s;
  --shift: 15s;
  --breathe: 9s;
}

.glow span:nth-child(4) {
  --size: 36vmax;
  --c1: var(--glow-4);
  --c2: var(--glow-5);
  --sx: 62vw;
  --sy: 50vh;
  --dx: 41s;
  --dy: 35s;
  --ox: -27s;
  --oy: -2s;
  --shift: 23s;
  --breathe: 15s;
}

.glow span:nth-child(5) {
  --size: 28vmax;
  --c1: var(--glow-5);
  --c2: var(--glow-6);
  --sx: 8vw;
  --sy: 62vh;
  --dx: 33s;
  --dy: 19s;
  --ox: -11s;
  --oy: -17s;
  --shift: 19s;
  --breathe: 10s;
}

.glow span:nth-child(6) {
  --size: 38vmax;
  --c1: var(--glow-6);
  --c2: var(--glow-1);
  --sx: 42vw;
  --sy: 70vh;
  --dx: 43s;
  --dy: 39s;
  --ox: -31s;
  --oy: -9s;
  --shift: 25s;
  --breathe: 14s;
}

/* Reduced motion: only a small, slow sway */
@media (prefers-reduced-motion: reduce) {
  .glow span {
    animation:
      sway var(--shift) ease-in-out infinite alternate,
      breathe var(--breathe) ease-in-out infinite alternate;
  }
}

/* Motion allowed: lights bounce across the whole page */
@media (prefers-reduced-motion: no-preference) {
  .glow span {
    translate: none;
    animation:
      bounce-x var(--dx) var(--ox) linear infinite alternate,
      breathe var(--breathe) ease-in-out infinite alternate;
    will-change: transform, opacity;
  }

  .glow span::before {
    animation:
      bounce-y var(--dy) var(--oy) linear infinite alternate,
      shade-out var(--shift) ease-in-out infinite alternate;
    will-change: transform, opacity;
  }

  .glow span::after {
    animation:
      bounce-y var(--dy) var(--oy) linear infinite alternate,
      shade-in var(--shift) ease-in-out infinite alternate;
    will-change: transform, opacity;
  }

  @keyframes bounce-x {
    from {
      transform: translateX(0);
    }

    to {
      transform: translateX(calc(100vw - var(--size)));
    }
  }

  @keyframes bounce-y {
    from {
      transform: translateY(0);
    }

    to {
      transform: translateY(calc(100vh - var(--size)));
    }
  }
}

@keyframes sway {
  from {
    transform: translate(-3vmax, -2vmax);
  }

  to {
    transform: translate(3vmax, 2vmax);
  }
}

@keyframes breathe {
  from {
    opacity: 1;
  }

  to {
    opacity: 0.45;
  }
}

@keyframes shade-out {
  from {
    opacity: var(--glow-alpha);
  }

  to {
    opacity: 0;
  }
}

@keyframes shade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: var(--glow-alpha);
  }
}

/* Skip link */
.skip-link {
  position: absolute;
  top: 0;
  left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  color: var(--color-bg);
  background: var(--color-text);
  border-radius: var(--radius);
  transform: translateY(-100%);
  transition: transform 150ms ease;
}

.skip-link:focus-visible {
  outline: var(--line-width) solid var(--color-link);
  outline-offset: 2px;
  transform: translateY(var(--space-2));
}

@media (prefers-reduced-motion: reduce) {
  .skip-link {
    transition: none;
  }
}

/* Layout: stacked on small screens, fixed sidebar on large ones */
.layout {
  max-width: var(--page-width);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.sidebar {
  padding-block: var(--space-5) var(--space-4);
}

main section {
  padding-block-end: var(--space-6);
  scroll-margin-top: var(--space-5);
}

footer {
  padding-block: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

footer p {
  margin: 0;
}

@media (min-width: 56rem) {
  .layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    grid-template-rows: 1fr auto;
    column-gap: var(--space-6);
  }

  .sidebar {
    position: sticky;
    top: 0;
    grid-row: 1 / span 2;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100vh;
    height: 100dvh;
    padding-block: var(--space-6) var(--space-5);
  }

  main {
    padding-block-start: var(--space-6);
  }

  footer {
    grid-column: 2;
  }
}

/* Intro (sidebar) */
.sidebar h1 {
  position: relative;
  isolation: isolate;
  margin: 0 0 var(--space-3);
  font-size: var(--text-3xl);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-heading);
}

.tagline {
  margin: 0 0 var(--space-2);
  font-size: var(--text-md);
  font-weight: 600;
  line-height: 1.4;
  text-wrap: balance;
  color: var(--color-heading);
}

.intro {
  max-width: 34ch;
  margin: 0;
  color: var(--color-muted);
}

/* Glitch on the name: occasional bursts, or a fixed split in dark mode with reduced motion */
@media (prefers-reduced-motion: reduce) and (prefers-color-scheme: dark) {
  .sidebar h1 {
    text-shadow:
      -2px -1px 0 var(--color-accent),
      2px 1px 0 var(--color-link);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .sidebar h1::before,
  .sidebar h1::after {
    content: attr(data-text) / "";
    position: absolute;
    inset: 0;
    z-index: -1;
    opacity: 0;
    pointer-events: none;
  }

  .sidebar h1::before {
    color: var(--color-accent);
    animation: glitch-a 4.7s -3s steps(1) infinite;
  }

  .sidebar h1::after {
    color: var(--color-link);
    animation: glitch-b 7.3s -4s steps(1) infinite;
  }

  @keyframes glitch-a {
    0%,
    86%,
    100% {
      opacity: 0;
    }

    87% {
      opacity: 1;
      transform: translate(-3px, -2px);
    }

    90% {
      transform: translate(3px, 2px);
    }

    93% {
      transform: translate(-4px, 1px);
    }

    96% {
      transform: translate(2px, -3px);
    }

    98% {
      opacity: 0;
    }
  }

  @keyframes glitch-b {
    0%,
    86%,
    100% {
      opacity: 0;
    }

    87% {
      opacity: 1;
      transform: translate(3px, 2px);
    }

    89% {
      transform: translate(-3px, -2px);
    }

    91% {
      transform: translate(4px, -1px);
    }

    93% {
      transform: translate(-2px, 3px);
    }

    94.5% {
      opacity: 0;
    }
  }
}

/* Section navigation */
.section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.section-nav a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-1);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  text-decoration: none;
  text-transform: uppercase;
  color: var(--color-muted);
}

.section-nav a:hover,
.section-nav a:focus-visible {
  color: var(--color-text);
}

@media (min-width: 56rem) {
  .section-nav {
    display: block;
    margin-block-start: var(--space-6);
  }

  .section-nav a::before {
    content: "";
    width: 2rem;
    height: var(--line-width);
    background: var(--color-muted);
    transition:
      width 350ms cubic-bezier(0.22, 1, 0.36, 1),
      background-color 350ms ease;
  }

  .section-nav a:hover::before,
  .section-nav a:focus-visible::before {
    width: 4rem;
    background: var(--color-text);
  }
}

/* Social icons: in the sidebar on large screens, in the footer otherwise */
.social {
  display: flex;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.social a {
  display: inline-flex;
  padding: var(--space-1);
  color: var(--color-muted);
  transition: color 250ms ease;
}

.social a:hover,
.social a:focus-visible {
  color: var(--brand, var(--color-text));
}

.social-linkedin {
  --brand: var(--brand-linkedin);
}

.social-linkedin svg {
  border-radius: 7.5%;
  transition: background-color 250ms ease;
}

.social-linkedin:hover svg,
.social-linkedin:focus-visible svg {
  background: #fff;
}

.social-github {
  --brand: var(--brand-github);
}

.social-twitter {
  --brand: var(--brand-twitter);
}

.social svg {
  width: 1.5rem;
  height: 1.5rem;
  fill: currentColor;
}

.social-sidebar {
  display: none;
}

.social-footer {
  margin-block-end: var(--space-3);
}

@media (min-width: 56rem) {
  .social-sidebar {
    display: flex;
  }

  .social-footer {
    display: none;
  }
}

/* Projects */
.project h3 {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-heading);
}

.project .chips {
  margin-block: var(--space-3);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* Skills */
.skill-groups {
  display: grid;
  gap: var(--space-4);
  margin: 0;
}

.skill-groups dt {
  margin-block-end: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

.skill-groups dd {
  margin: 0;
}

@media (min-width: 40rem) {
  .skill-groups > div {
    display: grid;
    grid-template-columns: 11rem 1fr;
    column-gap: var(--space-4);
    align-items: baseline;
  }

  .skill-groups dt {
    margin: 0;
  }
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.chips li {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  background: color-mix(in srgb, var(--color-accent) 14%, transparent);
  border-radius: var(--radius-pill);
}

/* Experience timeline: each role is a collapsible block */
.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--space-4);
  list-style: none;

  --timeline-x: 0px;
  --cap-size: 0.625rem;
}

.timeline::before {
  content: "";
  position: absolute;
  inset-block: 0 calc(var(--cap-size) / 2);
  left: var(--timeline-x);
  width: var(--line-width);
  background: var(--color-muted);
  transform-origin: top;
}

.timeline::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: calc(var(--timeline-x) + var(--line-width) / 2 - var(--cap-size) / 2);
  width: var(--cap-size);
  height: var(--cap-size);
  border: var(--line-width) solid var(--color-muted);
  border-radius: 50%;
}

.timeline > li {
  position: relative;
  padding-block-end: var(--space-4);
}

.timeline > li:last-child {
  padding-block-end: 0;
}

.timeline > li::before {
  content: "";
  position: absolute;
  top: 0.4em;
  left: calc(-1 * var(--space-4) - var(--dot-size) / 2 + var(--line-width) / 2);
  width: var(--dot-size);
  height: var(--dot-size);
  background: var(--color-link);
  border-radius: 50%;
}

.timeline > li:first-child::before {
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-link) 28%, transparent);
}

.timeline summary {
  position: relative;
  display: block;
  padding-inline-end: var(--space-5);
  cursor: pointer;
  list-style: none;
}

.timeline summary::-webkit-details-marker {
  display: none;
}

.timeline summary::after {
  content: "";
  position: absolute;
  top: 0.55em;
  right: var(--space-2);
  width: 0.55rem;
  height: 0.55rem;
  border-right: var(--line-width) solid var(--color-muted);
  border-bottom: var(--line-width) solid var(--color-muted);
  transform: rotate(45deg);
}

.timeline details[open] summary::after {
  top: 0.8em;
  transform: rotate(-135deg);
}

.timeline summary:hover::after {
  border-color: var(--color-text);
}

.timeline summary:focus-visible {
  outline: var(--line-width) solid var(--color-link);
  outline-offset: 4px;
  border-radius: var(--radius);
}

.timeline h3 {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-heading);
}

.timeline .meta {
  display: block;
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-timeline-meta);
}

.timeline .org {
  color: var(--color-text);
  font-size: var(--text-md);
  font-weight: 600;
}

.timeline .org::after {
  content: " ·";
}

.timeline .dates {
  white-space: nowrap;
}

.timeline ul {
  margin: var(--space-3) 0 0;
  padding: 0;
  font-size: var(--text-md);
  line-height: 1.5;
  list-style: none;
}

.timeline ul li {
  position: relative;
  max-width: var(--measure);
}

.timeline ul li + li {
  margin-block-start: var(--space-3);
}

.timeline ul li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: calc(-1 * var(--space-4));
  width: var(--space-3);
  border-top: var(--line-width) solid var(--color-muted);
  transform-origin: left;
}

@media (min-width: 72rem) {
  .timeline {
    padding: 0;

    --timeline-x: calc(
      var(--timeline-date-width) + var(--space-6) / 2 - var(--line-width) / 2
    );
  }

  .timeline > li::before {
    left: calc(
      var(--timeline-date-width) + var(--space-6) / 2 - var(--dot-size) / 2
    );
  }

  .timeline summary {
    display: grid;
    grid-template-columns: var(--timeline-date-width) 1fr;
    column-gap: var(--space-6);
    align-items: start;
  }

  .timeline h3 {
    grid-column: 2;
    grid-row: 1;
  }

  .timeline .meta {
    grid-column: 1;
    grid-row: 1;
    margin: 0.3em 0 0;
    text-align: right;
  }

  .timeline .meta span {
    display: block;
  }

  .timeline .org::after {
    content: none;
  }

  .timeline ul {
    margin-inline-start: calc(var(--timeline-date-width) + var(--space-6));
  }

  .timeline ul li::before {
    left: calc(-1 * var(--space-6) / 2);
    width: calc(var(--space-6) / 2 - var(--space-2));
  }
}

@media (hover: hover) {
  .timeline:hover > li:not(:hover) > details,
  .timeline:hover > li:not(:hover)::before {
    opacity: 0.6;
  }
}

@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  .timeline > li > details,
  .timeline > li::before {
    transition: opacity 200ms ease;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .timeline summary::after {
    transition:
      transform 200ms ease,
      top 200ms ease;
  }

  .timeline details[open] ul {
    animation: timeline-open 250ms ease-out;
  }

  @supports (animation-timeline: view()) {
    .timeline::before {
      animation: timeline-draw linear both;
      animation-timeline: view();
      animation-range: cover 0% cover 35%;
    }

    .timeline > li {
      animation: timeline-reveal linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 55%;
    }

    .timeline ul li::before {
      animation: timeline-branch linear both;
      animation-timeline: view();
      animation-range: entry 10% entry 70%;
    }
  }

  @keyframes timeline-open {
    from {
      opacity: 0;
      transform: translateY(-6px);
    }

    to {
      opacity: 1;
      transform: none;
    }
  }

  @keyframes timeline-draw {
    from {
      transform: scaleY(0);
    }

    to {
      transform: scaleY(1);
    }
  }

  @keyframes timeline-reveal {
    from {
      opacity: 0;
      transform: translateY(var(--space-4));
    }

    to {
      opacity: 1;
      transform: none;
    }
  }

  @keyframes timeline-branch {
    from {
      transform: scaleX(0);
    }

    to {
      transform: scaleX(1);
    }
  }
}