:root {
  --radius-pill: 999px;
  --radius-lg: 1.25rem;
}

:root {
  --estonia-blue: #0072ce;
  --estonia-blue-soft: #6fb6e9;
  --estonia-blue-12: rgba(0, 114, 206, 0.12);
  --estonia-blue-20: rgba(0, 114, 206, 0.2);
  --estonia-blue-55: rgba(0, 114, 206, 0.55);
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --shadow-ink-06: rgba(15, 23, 42, 0.06);
  --shadow-search: 0 18px 40px rgba(15, 23, 42, 0.1);
  --text-main: var(--gray-800);
  --text-muted: var(--gray-500);
  --line-soft: var(--gray-200);
  --line-faint: var(--gray-100);
  --bg-soft: var(--gray-50);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Noto Sans SC",
    "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC",
    "Source Han Serif CN", "PMingLiU", "Times New Roman", Georgia, serif;
  --font-mono: "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, Monaco,
    monospace;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

main,
.site-header,
.site-footer {
  width: min(100%, 64rem);
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.page-shell {
  padding-top: 3rem;
}

.site-header {
  margin-bottom: 4rem;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 1.75rem;
}

.site-title {
  margin: 0;
  font-size: 2.25rem;
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.site-title span {
  color: var(--estonia-blue);
}

.search-box {
  position: relative;
  display: block;
  width: min(100%, 16rem);
}

.search-box input {
  width: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  background: var(--bg-soft);
  padding: 0.7rem 2.5rem 0.7rem 1rem;
  font: inherit;
  font-size: 0.875rem;
  color: var(--text-main);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--estonia-blue);
  box-shadow: 0 0 0 3px var(--estonia-blue-12);
}

.search-box svg {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  width: 1rem;
  height: 1rem;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
}

.search-results {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  right: 0;
  z-index: 20;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--white);
  box-shadow: var(--shadow-search);
}

.search-results__empty {
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.search-result {
  display: block;
  padding: 0.95rem 1rem;
  border-top: 1px solid var(--line-faint);
  transition: background-color 0.2s ease;
}

.search-result:first-child {
  border-top: 0;
}

.search-result:hover,
.search-result.is-active {
  background: var(--gray-50);
}

.search-result__meta {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
  color: var(--gray-400);
  font-size: 0.75rem;
}

.search-result__title {
  color: var(--gray-900);
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.4;
}

.search-result__excerpt {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.search-result mark {
  background: transparent;
  color: var(--estonia-blue);
}

.site-nav ul {
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0 0 1rem;
  list-style: none;
  border-bottom: 1px solid var(--line-faint);
}

.site-nav a {
  display: inline-block;
  padding-bottom: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.site-nav a.is-active {
  color: var(--estonia-blue);
  border-bottom: 2px solid var(--estonia-blue);
}

main {
  padding-bottom: 6rem;
}

.intro {
  margin-bottom: 6rem;
}

.intro__content {
  max-width: 42rem;
}

.intro__content h2 {
  margin: 0 0 1.5rem;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-style: italic;
  font-weight: 700;
  line-height: 1.15;
  color: var(--gray-900);
}

.intro__lead {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  color: var(--text-muted);
}

.intro__body {
  margin: 0;
  color: var(--text-muted);
}

.archive {
  margin-bottom: 6rem;
}

.archive__heading {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.archive__dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--estonia-blue-soft);
}

.archive__heading h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.archive-group {
  margin-bottom: 3rem;
}

.archive-group__yearline {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  color: var(--gray-400);
}

.archive-group__yearline h4 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 400;
  font-family: var(--font-mono);
}

.archive-group__rule {
  height: 1px;
  flex: 1;
  background: var(--line-faint);
}

.archive-group__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.archive-group__list li + li {
  margin-top: 1.5rem;
}

.archive__more {
  margin: 3rem 0 0;
}

.archive__more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid currentColor;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--estonia-blue);
  transition: color 0.2s ease, transform 0.2s ease;
}

.archive__more-link:hover {
  transform: translateX(0.2rem);
}

.post-link {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  font-size: 1.25rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.post-link:hover {
  color: var(--estonia-blue);
  transform: translateX(0.25rem);
}

.post-link__date {
  flex: 0 0 auto;
  color: var(--gray-300);
  font-size: 0.875rem;
}

.post-link:hover .post-link__date {
  color: var(--estonia-blue-55);
}

.section-hero {
  max-width: 42rem;
  margin-bottom: 4rem;
}

.section-hero__eyebrow,
.post-eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--estonia-blue);
}

.section-hero h1,
.post-header h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--gray-900);
}

.section-hero__lead {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text-muted);
}

.section-list {
  margin-bottom: 4rem;
}

.content-list {
  display: grid;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.content-card {
  display: block;
  padding: 1.5rem;
  border: 1px solid var(--line-faint);
  border-radius: 1.25rem;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.content-card:hover {
  border-color: var(--estonia-blue-20);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--shadow-ink-06);
}

.content-card__meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.9rem;
  font-size: 0.8rem;
  color: var(--gray-400);
}

.content-card h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  line-height: 1.25;
}

.content-card p {
  margin: 0;
  color: var(--text-muted);
}

.doc-page {
  max-width: 44rem;
}

.doc-page__header {
  margin-bottom: 2.5rem;
}

.doc-page__eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--estonia-blue);
}

.doc-page__header h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--gray-900);
}

.doc-page__lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.08rem;
  line-height: 1.85;
}

.doc-page__body {
  color: var(--gray-700);
  font-size: 1.02rem;
}

.doc-page__body > * {
  margin-top: 0;
}

.doc-page__body > * + * {
  margin-top: 1rem;
}

.doc-page__body h2 {
  margin-top: 2rem;
  margin-bottom: 0.9rem;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--gray-900);
}

.doc-page__body p,
.doc-page__body li {
  line-height: 1.9;
}

.doc-page__body a {
  color: var(--estonia-blue);
  text-decoration: underline;
  text-decoration-color: var(--estonia-blue-20);
  text-underline-offset: 0.18em;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.doc-page__body a:hover {
  color: var(--gray-900);
  text-decoration-color: var(--estonia-blue);
}

.doc-page__body ul,
.doc-page__body ol {
  padding-left: 1.4rem;
}

.doc-page__body li + li {
  margin-top: 0.4rem;
}

.doc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-faint);
}

.doc-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line-faint);
}

.doc-list a {
  color: var(--gray-900);
  text-decoration: none;
}

.doc-list a:hover {
  color: var(--estonia-blue);
}

.doc-list span {
  flex: 0 0 auto;
  color: var(--gray-400);
  font-size: 0.85rem;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.about-card {
  padding: 1.6rem;
  border: 1px solid var(--line-faint);
  border-radius: 1.25rem;
  background: var(--white);
}

.about-card h2 {
  margin: 0 0 0.75rem;
  font-size: 1.2rem;
}

.about-card p {
  margin: 0;
  color: var(--text-muted);
}

.post {
  max-width: 44rem;
}

.post-header {
  margin-bottom: 2.5rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--gray-400);
  font-size: 0.9rem;
}

.post-body {
  font-size: 1.05rem;
  color: var(--gray-700);
}

.post-body > * {
  margin-top: 0;
}

.post-body > * + * {
  margin-top: 1.2rem;
}

.post-body p {
  line-height: 1.9;
}

.post-body h2,
.post-body h3 {
  margin-top: 2rem;
  font-size: 1.35rem;
  color: var(--gray-900);
}

.post-body ol,
.post-body ul {
  padding-left: 1.4rem;
}

.post-body li + li {
  margin-top: 0.5rem;
}

.site-footer {
  padding-bottom: 5rem;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line-faint);
  color: var(--gray-400);
  font-size: 0.875rem;
}

.site-footer__inner p {
  margin: 0;
}

.site-footer__links {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__links a {
  text-decoration: underline;
  text-decoration-color: var(--gray-200);
  text-underline-offset: 0.2em;
  transition: color 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--text-muted);
}

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-thumb {
  background: var(--gray-200);
  border-radius: 999px;
}

@media (max-width: 48rem) {
  .page-shell {
    padding-top: 2rem;
  }

  .site-header__inner,
  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .search-box {
    width: 100%;
  }

  .search-results {
    right: 0;
  }

  .site-nav ul,
  .site-footer__links {
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
  }

  .site-nav a {
    padding-bottom: 0.5rem;
  }

  .post-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
    font-size: 1.125rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .content-card {
    padding: 1.25rem;
  }

  .content-card__meta,
  .post-meta {
    flex-direction: column;
    gap: 0.35rem;
  }

  .search-result__meta {
    flex-wrap: wrap;
    gap: 0.35rem 0.75rem;
  }

  .doc-list li {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}