:root {
  color-scheme: light;
  --bg: #f4f8fd;
  --surface: #ffffff;
  --surface-alt: #e6eef8;
  --text: #132033;
  --muted: #5a6980;
  --border: #d4deeb;
  --border-strong: #b8c8db;
  --accent: #2563eb;
  --accent-2: #1d4ed8;
  --accent-soft: #e3ecff;
  --ink-soft: rgba(19, 32, 51, 0.08);
  --shadow: 0 18px 48px rgba(19, 32, 51, 0.1);
  --radius: 8px;
  --container: min(1120px, calc(100vw - 40px));
  --font-default: "PT Serif Caption", Georgia, "Times New Roman", Times, serif;
}

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

html {
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  font-size: 16px;
}

body {
  margin: 0;
  font-family: var(--font-default);
  line-height: 1.625;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.1), transparent 30rem),
    linear-gradient(180deg, #f9fbff 0, var(--bg) 32rem);
}

body > main {
  flex: 1 0 auto;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.1875em;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

a:hover { color: var(--accent-2); }

a:focus-visible {
  outline: 3px solid rgba(20, 108, 99, 0.32);
  outline-offset: 3px;
  border-radius: 4px;
}

img {
  display: block;
  max-width: 100%;
}

.site-header > div,
body > footer > div,
main > section > div,
main > article,
main.not-found > div {
  width: var(--container);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(249, 251, 255, 0.84);
  border-bottom: 1px solid rgba(212, 222, 235, 0.78);
  backdrop-filter: blur(18px);
}

.site-header > div,
body > footer > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 0;
}

.site-header .main-navigation {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.site-header .navigation-start {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.site-header .site-name {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--text);
  text-decoration: none;
}

.site-header .site-name svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: var(--accent);
  filter: drop-shadow(0 0 0.25rem var(--accent-soft));
}

.site-header .navigation-toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.site-header .navigation-toggle-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  cursor: pointer;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 700;
}

.site-header .navigation-toggle-label span,
.site-header .navigation-toggle-label span::before,
.site-header .navigation-toggle-label span::after {
  display: block;
  width: 1.25rem;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: background-color 160ms ease, transform 160ms ease;
}

.site-header .navigation-toggle-label span {
  position: relative;
}

.site-header .navigation-toggle-label span::before,
.site-header .navigation-toggle-label span::after {
  position: absolute;
  content: "";
  left: 0;
}

.site-header .navigation-toggle-label span::before { top: -0.4375rem; }

.site-header .navigation-toggle-label span::after { top: 0.4375rem; }

.site-header .navigation-toggle:focus-visible + .navigation-start .navigation-toggle-label {
  outline: 3px solid rgba(20, 108, 99, 0.32);
  outline-offset: 3px;
}

.site-header .navigation-toggle:checked + .navigation-start .navigation-toggle-label span {
  background: transparent;
}

.site-header .navigation-toggle:checked + .navigation-start .navigation-toggle-label span::before {
  transform: translateY(0.4375rem) rotate(45deg);
}

.site-header .navigation-toggle:checked + .navigation-start .navigation-toggle-label span::after {
  transform: translateY(-0.4375rem) rotate(-45deg);
}

.site-header .navigation-links {
  position: fixed;
  inset: unset;
  top: 4.5rem;
  left: max(0.875rem, calc((100vw - 1120px) / 2));
  display: grid;
  gap: 0.5rem;
  min-width: 18rem;
  padding: 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-0.5rem);
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms ease;
}

.site-header .navigation-toggle:checked ~ .navigation-links {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

.site-header .language-choice {
  margin-left: auto;
}

.site-header .language-choice button {
  appearance: none;
  cursor: pointer;
  padding: 0.5rem 2.25rem 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) calc(100% - 0.875rem) 55% / 0.375rem 0.375rem no-repeat,
    linear-gradient(135deg, var(--muted) 50%, transparent 50%) calc(100% - 0.625rem) 55% / 0.375rem 0.375rem no-repeat,
    var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
}

.site-header .language-choice button:hover {
  border-color: var(--border-strong);
}

.site-header .language-choice button:focus-visible {
  outline: 3px solid rgba(20, 108, 99, 0.32);
  outline-offset: 3px;
}

.site-header .language-options {
  position: fixed;
  inset: unset;
  top: 4.5rem;
  right: max(0.875rem, calc((100vw - 1120px) / 2));
  min-width: max-content;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.site-header .language-options:popover-open {
  display: grid;
  gap: 0.25rem;
}

.site-header .language-options a {
  padding: 0.375rem 0.5rem;
  border-radius: 4px;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.site-header .language-options a:hover,
.site-header .language-options a[aria-current] {
  background: var(--accent-soft);
  color: var(--accent);
}

.site-header .navigation-links a {
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}

.site-header .navigation-links a[aria-current] {
  color: var(--accent);
}

main > section,
main > article,
main.not-found {
  padding: clamp(3rem, 7vw, 5.75rem) 0;
}

main:not(.home) > section + section {
  padding-top: 0;
}

.home-profile {
  position: relative;
  padding: 0;
  overflow: hidden;
  background: #f4f8fd;
}

.home-profile::before,
.home-profile::after {
  position: absolute;
  inset-block: 0;
  left: 50%;
  width: var(--container);
  content: "";
  transform: translateX(-50%);
}

.home-profile::before {
  background: #dce9f3 url("../img/home/profile.jpg") right center / auto 100% no-repeat;
}

.home-profile::after {
  background:
    linear-gradient(90deg, #f4f8fd 0 43%, rgba(244, 248, 253, 0.92) 55%, rgba(244, 248, 253, 0.08) 72%, rgba(244, 248, 253, 0.08) 88%, #f4f8fd 100%);
  pointer-events: none;
}

.home-profile > div {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 24rem;
  align-content: center;
}

.home-profile > div > * {
  max-width: 58%;
}

main.home > section:nth-child(even) {
  background: linear-gradient(180deg, var(--surface-alt), rgba(230, 238, 248, 0.625));
}

h1,
h2,
h3 {
  line-height: 1;
  letter-spacing: 0;
}

h1 {
  margin: 0 0 0.875rem;
  font-size: clamp(2.5rem, 6vw, 5.5rem);
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 4rem);
}

h3 {
  margin: 0.375rem 0 0.5rem;
  font-size: 1.25rem;
  line-height: 1.125;
}

section > div > header {
  display: grid;
  gap: 0.375rem;
  margin-bottom: 1.5rem;
}

section > div > header::after {
  content: "";
  width: 4rem;
  height: 3px;
  margin-top: 0.375rem;
  background: var(--accent);
}

main.single article,
main.not-found > div {
  font-size: 1.0625rem;
}

main.single article > header {
  margin-bottom: 1.75rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.page-meta,
.page-card-date,
.copyright,
.accomplishment-meta,
.employment-period {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem 0.75rem;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.4;
}

.profile-summary {
  margin: 0.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.5;
}

main p,
main ul,
main ol,
main blockquote,
main pre,
main table {
  margin: 1rem 0;
}

main h2,
main h3 {
  margin-top: 2.25rem;
  margin-bottom: 0.625rem;
  line-height: 1.125;
}

main.single h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
}

blockquote {
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--accent-soft);
}

pre {
  overflow: auto;
  padding: 1rem 1.125rem;
  border: 1px solid #26312f;
  border-radius: var(--radius);
  background: #111816;
  color: #eef4ef;
}

code {
  padding: 0.125rem 0.375rem;
  border-radius: 5px;
  background: var(--ink-soft);
}

pre code {
  padding: 0;
  background: transparent;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 0.625rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

main.single .article-navigation {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

main.not-found a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.5);
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
}

main.not-found a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  list-style: none;
}

.social-links a {
  min-width: 2.5rem;
}

.profile-summary .social-links {
  display: inline-flex;
  gap: 0.5rem;
  margin-inline-start: 0.5rem;
  padding: 0;
  vertical-align: middle;
}

.profile-summary .social-links a {
  display: inline-flex;
  background: transparent;
  color: var(--accent);
  text-decoration: none;
}

.profile-summary .social-links a:focus-visible {
  outline: none;
}

.profile-summary .social-links a {
  min-width: 0;
}

.social-links .social-icon {
  font-size: 2rem;
  line-height: 1;
}

.post-list,
.experience-list,
.accomplishment-list {
  display: grid;
  gap: 1rem;
}

.post-list {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
}

.page-card,
.experience-item,
.accomplishment {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset, 0 14px 32px rgba(19, 32, 51, 0.07);
}

.page-card-tech {
  background:
    linear-gradient(rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0.38)),
    url("../img/tech-article-background.svg") center / cover;
}

article h2,
article h3 {
  max-width: none;
  font-size: 1.25rem;
}

article h2 a,
article h3 a {
  color: var(--text);
  text-decoration: none;
}

article h2 a:hover,
article h3 a:hover {
  color: var(--accent);
}

.page-card-summary,
.accomplishment-description {
  color: var(--muted);
}

.taxonomy-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  list-style: none;
}

.taxonomy-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  color: var(--text);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
}

.taxonomy-list a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.experience-item {
  display: grid;
  grid-template-columns: minmax(12rem, 20rem) minmax(0, 1fr);
  gap: 1.5rem;
  border-left-width: 0.375rem;
  border-left-color: var(--border);
}

.experience-item-current {
  border-left-color: var(--accent);
}

.experience-item header h3,
.experience-item header p {
  margin: 0.375rem 0 0;
}

.table-of-contents {
  margin: 2rem 0;
  padding: 0 0 1rem 1.25rem;
  border-left: 3px solid var(--accent);
}

.table-of-contents h2 {
  margin-top: 0;
  margin-bottom: 0.625rem;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.table-of-contents ul {
  margin: 0;
  padding-left: 1.25rem;
}

.table-of-contents li + li {
  margin-top: 0.25rem;
}

main.single .article-navigation {
  justify-content: space-between;
  margin-top: 3rem;
}

main.single .article-navigation a {
  flex: 1;
  display: grid;
  gap: 0.25rem;
  padding: 1rem 1.125rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  color: var(--text);
  text-decoration: none;
}

main.single .article-navigation a:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

main.single .article-navigation a[rel="next"] {
  text-align: right;
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  color: var(--muted);
}

body > footer {
  margin-top: 0;
  border-top: 1px solid var(--border);
  background: rgba(244, 248, 253, 0.76);
  color: var(--muted);
}

body > footer p {
  margin: 0;
}

@media (min-width: 861px) {
  .site-header .navigation-toggle,
  .site-header .navigation-toggle-label { display: none; }

  .site-header .navigation-links {
    position: static;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    min-width: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: none;
  }

  .site-header .navigation-links {
    margin-left: auto;
  }

  .site-header .language-choice {
    margin-left: 0;
  }

  .site-header .navigation-links > a {
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
  }

  .site-header .navigation-links > a:hover,
  .site-header .navigation-links > a[aria-current] {
    background: var(--accent-soft);
    color: var(--accent);
  }

}

@media (max-width: 860px) {
  .site-header > div,
  body > footer > div {
    flex-direction: column;
    align-items: stretch;
  }

  .site-header > div {
    flex-direction: row;
    align-items: center;
  }

  .site-header .navigation-links {
    width: min(18rem, calc(100vw - 28px));
    min-width: 0;
  }

  .home-profile::before {
    background: #dce9f3 url("../img/home/profile.jpg") center bottom / auto 64% no-repeat;
  }

  .home-profile::before,
  .home-profile::after {
    width: min(var(--container), 25.6rem);
  }

  .home-profile::after {
    background:
      linear-gradient(90deg, #f4f8fd 0, rgba(244, 248, 253, 0) 18%, rgba(244, 248, 253, 0) 82%, #f4f8fd 100%),
      linear-gradient(180deg, #f4f8fd 0 31%, rgba(244, 248, 253, 0.94) 42%, rgba(244, 248, 253, 0.08) 68%);
  }

  .home-profile > div {
    align-content: start;
    padding-top: clamp(1.5rem, 5vw, 3rem);
  }

  .home-profile > div > * {
    max-width: none;
  }

  .experience-item {
    grid-template-columns: 1fr;
  }

  main.single .article-navigation {
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  :root { --container: min(100vw - 28px, 1120px); }

  .site-header { position: static; }

  main > section,
  main > article,
  main.not-found {
    padding: 3rem 0;
  }

  h1 {
    font-size: clamp(2.25rem, 13vw, 3.5rem);
  }

  .taxonomy-list a {
    min-height: 2.375rem;
    padding-inline: 0.75rem;
  }
}