*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  font-family: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  line-height: 1.45;
  --rail-pad-top: 28px;
  --brand-size: 36px;
  --brand-gap: 32px;
  --content-offset: calc(var(--rail-pad-top) + var(--brand-size) + var(--brand-gap));
  --logo-display-width: 128px;
  --logo-display-width-mobile: 109px;
  --logo-display-inset: 12px;
  --logo-display-gap: 12px;
  --content-logo-reserve: calc(var(--logo-display-width) + var(--logo-display-inset) + var(--logo-display-gap));
  --input-radius: 8px;
}

[data-theme="dark"] {
  --bg: #2564ad;
  --fg: #f9f9f9;
  --fg-muted: rgba(249, 249, 249, 0.55);
  --fg-subtle: rgba(249, 249, 249, 0.35);
  --divider: rgba(249, 249, 249, 0.25);
  --input-bg: rgba(249, 249, 249, 0.08);
  --input-border: rgba(249, 249, 249, 0.35);
  --link-active: #f9f9f9;
  --graphic: #f9f9f9;
}

[data-theme="light"] {
  --bg: #f9f9f9;
  --fg: #2564ad;
  --fg-muted: rgba(37, 100, 173, 0.55);
  --fg-subtle: rgba(37, 100, 173, 0.35);
  --divider: rgba(37, 100, 173, 0.2);
  --input-bg: rgba(37, 100, 173, 0.06);
  --input-border: rgba(37, 100, 173, 0.3);
  --link-active: #2564ad;
  --graphic: #2564ad;
}

html {
  scrollbar-gutter: stable;
}

html,
body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
}

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

a:hover {
  text-decoration: underline;
}

.layout {
  display: grid;
  grid-template-columns: minmax(220px, 28%) 1fr;
  min-height: 100vh;
}

/* ── Left rail ── */

.rail {
  padding: var(--rail-pad-top) 24px 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 36px;
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  max-height: 100vh;
  overflow-y: auto;
  box-sizing: border-box;
}

.brand {
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: var(--brand-size);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  height: var(--brand-size);
  margin-bottom: var(--brand-gap);
}

.brand-link {
  color: inherit;
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.description {
  color: var(--fg);
  margin-bottom: 8px;
}

.inline-link {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.section-label {
  font-size: 14px;
  font-weight: 400;
  color: var(--fg-muted);
  margin-bottom: 8px;
}

.rail-section .section-label {
  color: var(--fg);
}

.section-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.section-links a {
  display: block;
  color: var(--fg-subtle);
}

.section-links a.active,
.section-links a:hover {
  color: var(--fg);
}

.rail-nav,
.rail-social {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.rail-nav a,
.rail-social a {
  display: block;
  color: var(--fg);
}

.link-tagline {
  display: block;
  font-style: italic;
}

.link-icon {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  vertical-align: middle;
  background:
    radial-gradient(circle 1px at 2px 2px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 5px 2px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 8px 2px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 2px 5px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 5px 5px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 8px 5px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 2px 8px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 5px 8px, var(--fg) 1px, transparent 1px),
    radial-gradient(circle 1px at 8px 8px, var(--fg) 1px, transparent 1px);
  background-repeat: no-repeat;
  opacity: 0.7;
}

.section-links a.active .link-icon,
.section-links a:hover .link-icon {
  opacity: 1;
}

.connect-links a {
  color: var(--fg);
}

/* Newsletter */

.newsletter {
  margin-top: 28px;
}

.newsletter-label {
  display: block;
  color: var(--fg);
  margin-bottom: 6px;
}

.newsletter-form {
  display: flex;
  align-items: stretch;
  gap: 0;
  max-width: 300px;
  border: 1px solid var(--divider);
  background: transparent;
  border-radius: var(--input-radius);
  overflow: hidden;
}

.newsletter-form input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  color: var(--fg-muted);
  font: inherit;
  padding: 6px 8px;
  outline: none;
}

.newsletter-form input::placeholder {
  color: var(--fg-subtle);
}

.newsletter-form button {
  border: none;
  border-left: 1px solid var(--divider);
  background: transparent;
  color: var(--fg-subtle);
  font: inherit;
  padding: 6px 10px;
  cursor: pointer;
}

.newsletter-form button:hover {
  color: var(--fg-muted);
  background: transparent;
}

/* Theme toggle */

.theme-toggle {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--fg);
  font: inherit;
  padding: 5px 10px;
  cursor: pointer;
  align-self: flex-start;
  border-radius: var(--input-radius);
}

.theme-toggle:hover {
  border-color: var(--fg-muted);
}

.theme-toggle-icon {
  font-size: 14px;
  line-height: 1;
}

/* ── Main content ── */

.content {
  padding: var(--content-offset) var(--content-logo-reserve) 48px 0;
  overflow: visible;
}

.content:has(article) {
  padding-bottom: var(--content-offset);
}

.content-logo {
  position: fixed;
  top: var(--logo-display-inset);
  right: var(--logo-display-inset);
  width: var(--logo-display-width);
  color: var(--fg);
  pointer-events: none;
  z-index: 10;
}

.content-logo svg {
  display: block;
  width: 100%;
  height: auto;
}

.content-loading {
  color: var(--fg-muted);
}

article {
  max-width: 640px;
  margin: 0 auto;
  padding-top: 0;
}

article.essay-enter {
  animation: essay-enter 0.8s ease-out both;
}

@keyframes essay-enter {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  article.essay-enter {
    animation: none;
  }
}

.page-header {
  text-align: center;
  margin: 0 0 24px;
  padding-top: 0;
}

.page-title {
  font-size: 24px;
  font-weight: 400;
  font-style: italic;
  line-height: 1.2;
  margin: 0 0 6px;
}

.page-subtitle {
  color: var(--fg-muted);
  margin-bottom: 10px;
}

.page-meta {
  color: var(--fg-muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.divider {
  border: none;
  border-top: 1px dotted var(--divider);
  margin: 20px 0;
}

.page-graphic {
  display: flex;
  justify-content: center;
  margin: 28px 0;
}

.page-graphic svg,
.page-graphic img {
  color: var(--graphic);
  width: 188px;
  height: auto;
  display: block;
}

.page-body {
  margin: 0;
}

.page-body p {
  margin-bottom: 14px;
}

.page-body p:last-child {
  margin-bottom: 0;
}

.page-quote {
  margin: 32px 0 0 24px;
  padding-left: 24px;
  border-left: 2px solid var(--fg);
  font-style: italic;
}

.page-quote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: var(--fg-muted);
}

.page-footer-links {
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.page-footer-links a {
  color: var(--fg-muted);
}

/* News listing */

.news-page {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
}

.news-page .section-label {
  margin-bottom: 16px;
  font-size: 24px;
}

.news-list {
  list-style: none;
}

.news-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--divider);
  align-items: start;
}

.news-item:last-child {
  border-bottom: 1px solid var(--divider);
}

.news-date {
  color: var(--fg-muted);
  white-space: nowrap;
}

.news-title {
  font-weight: 600;
  margin-bottom: 2px;
}

.news-location {
  color: var(--fg-muted);
}

/* Connect page */

.connect-page {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
}

.connect-page .section-label {
  margin-bottom: 12px;
  font-size: 24px;
}

.connect-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.connect-list a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Team page */

.team-page {
  max-width: 640px;
  margin: 0 auto;
  text-align: left;
}

.team-page .section-label {
  margin-bottom: 48px;
  font-size: 24px;
}

.team-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.team-name {
  font-weight: 600;
  margin-bottom: 2px;
}

.team-role {
  color: var(--fg-muted);
}

.team-page .page-body {
  margin-top: 8px;
}

/* Mobile only: returns to the stacked nav once it has scrolled out of view. */
.back-to-top {
  display: none;
}

@media (max-width: 768px) {
  .layout {
    position: relative;
    grid-template-columns: 1fr;
  }

  .rail {
    position: static;
    height: auto;
    max-height: none;
    overflow-y: visible;
    padding-top: calc(var(--rail-pad-top) + var(--logo-display-width-mobile) * 222 / 228 + 4px);
    padding-bottom: 20px;
    border-bottom: 1px solid var(--divider);
  }

  .content {
    display: block;
    position: static;
    padding: 28px 28px 40px;
  }

  .content:has(article) {
    padding-bottom: 28px;
  }

  .content-logo {
    position: absolute;
    top: var(--rail-pad-top);
    left: 28px;
    right: auto;
    width: var(--logo-display-width-mobile);
    z-index: 1;
  }

  .back-to-top {
    display: flex;
    align-items: center;
    justify-content: center;
    position: fixed;
    right: 20px;
    bottom: 20px;
    width: 44px;
    height: 44px;
    border: 1px solid var(--divider);
    border-radius: 50%;
    background: var(--bg);
    color: var(--fg);
    font: inherit;
    font-size: 18px;
    cursor: pointer;
    z-index: 20;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }

  .back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
  }
}