/*
 * Shared site chrome: the header, its collapsed mobile navigation, the Support Us button
 * and popup, and the footer.
 *
 *   markup     partials/site-header.html, partials/support-modal.html, partials/site-footer.html
 *              (stamped into each page by scripts/build-site-partials.mjs)
 *   behaviour  assets/site/site-chrome.js
 *
 * Self-contained on purpose. The pages that carry this chrome use four different design
 * systems (assets/pages/css/shared.css, assets/css/main.css, browse/browse.css and the
 * census explorer's inline styles), so nothing here reads a page token, and no page
 * stylesheet styles these classes. The map app's shell may position the header
 * (app/src/test2.css pins it to the viewport) but does not restyle it.
 */

@font-face {
  font-family: 'Civgraph Chrome';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(/assets/fonts/inter-latin.woff2) format('woff2');
}

:root {
  --chrome-base: #065a6e;
  --chrome-green: #0fa55a;
  --chrome-navy: #003870;
  --chrome-teal: #0a7a78;
  --chrome-gradient:
    radial-gradient(circle at 0% 50%, var(--chrome-green) 0%, transparent 50%),
    radial-gradient(circle at 100% 50%, var(--chrome-navy) 0%, transparent 50%),
    radial-gradient(circle at 40% 100%, var(--chrome-teal) 0%, transparent 60%);
  --chrome-font: 'Civgraph Chrome', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --chrome-radius-md: 8px;
  --chrome-radius-lg: 12px;
  --chrome-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);
  --chrome-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);
  --chrome-modal-surface: #ffffff;
  --chrome-modal-text: #1a202c;
  --chrome-modal-muted: #718096;
  --chrome-modal-hover: #f7fafc;
  --chrome-modal-border: #edf2f7;
}

:root[data-theme="dark"] {
  --chrome-modal-surface: #1a202c;
  --chrome-modal-text: #f7fafc;
  --chrome-modal-muted: #a0aec0;
  --chrome-modal-hover: #2d3748;
  --chrome-modal-border: #2d3748;
}

.app-header,
.app-header *,
.ftr,
.ftr *,
.support-modal,
.support-modal * {
  box-sizing: border-box;
}

/* ================================================================ header */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .5rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 40;
  overflow: visible;
  background: var(--chrome-base);
  background-image: var(--chrome-gradient);
  color: #fff;
  box-shadow: var(--chrome-shadow-md);
  font-family: var(--chrome-font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* SCALE, DO NOT TRUNCATE. The logo and wordmark are both calc()'d from --brand-size, so
   the brand shrinks in proportion on a narrow screen rather than being clipped. */
.app-header__brand {
  --brand-size: clamp(28px, 8vw, 60px);
  display: flex;
  align-items: center;
  gap: calc(var(--brand-size) * .05);
  flex-shrink: 0;
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.app-header__logo-icon {
  width: calc(var(--brand-size) * .917);
  height: calc(var(--brand-size) * .917);
  object-fit: contain;
  flex-shrink: 0;
}

.app-header__wordmark {
  font-family: var(--chrome-font);
  font-size: calc(var(--brand-size) * .567);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}

.app-header__nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: .25rem;
  margin: 0;
  padding: 0;
}

.app-header__link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .5rem 1rem;
  border-radius: var(--chrome-radius-md);
  color: rgba(255, 255, 255, .9);
  font-size: .95rem;
  font-weight: 500;
  text-decoration: none;
  transition: all .15s ease;
}

.app-header__link:hover,
.app-header__link--active {
  color: #fff;
  background: rgba(255, 255, 255, .15);
}

.app-header__link .icon {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  opacity: .95;
}

.app-header a:focus-visible,
.app-header button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* ------------------------------------------------------------ Support Us */

.support-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: .5rem;
  padding: 6px 14px;
  border: none;
  border-radius: 9999px;
  background: #22c55e;
  color: #fff;
  font-family: inherit;
  font-size: .875rem;
  font-weight: 600;
  line-height: normal;
  white-space: nowrap;
  cursor: pointer;
  transition: background .15s ease, transform .15s ease;
}

.support-btn:hover {
  background: #16a34a;
  transform: translateY(-1px);
}

.support-btn__icon {
  display: block;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
}

@media (hover: none) {
  .support-btn:hover {
    transform: none;
  }
}

/* ---------------------------------------------------------- theme toggle */

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-left: .35rem;
  padding: 0;
  border: none;
  border-radius: 9999px;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  cursor: pointer;
  transition: background .15s ease;
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, .28);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.theme-toggle__icon--sun { display: block; }
.theme-toggle__icon--moon { display: none; }
:root[data-theme="dark"] .theme-toggle__icon--sun { display: none; }
:root[data-theme="dark"] .theme-toggle__icon--moon { display: block; }

/* ---------------------------------------------------- mobile menu toggle */

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  padding: 0;
  border: 0;
  border-radius: 9999px;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  cursor: pointer;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle:focus-visible {
  background: rgba(255, 255, 255, .28);
}

.mobile-menu-toggle svg {
  width: 20px;
  height: 20px;
}

.mobile-menu-toggle__close {
  display: none;
}

.app-header.nav-open .mobile-menu-toggle__menu {
  display: none;
}

.app-header.nav-open .mobile-menu-toggle__close {
  display: block;
}

/* ------------------------------------------------------------ breakpoints */

@media (min-width: 901px) and (max-width: 1180px) {
  .app-header {
    padding-left: 1rem;
    padding-right: 1rem;
    gap: .65rem;
  }

  .app-header__brand {
    --brand-size: clamp(46px, 5vw, 56px);
  }

  .app-header__nav {
    gap: .05rem;
  }

  .app-header__link {
    padding: .48rem .68rem;
    gap: .35rem;
    font-size: .9rem;
  }

  .app-header__link .icon {
    width: 16px;
    height: 16px;
  }

  .support-btn {
    padding: 6px 10px;
    margin-left: .2rem;
  }

  .theme-toggle {
    margin-left: .1rem;
  }
}

/* Collapsed navigation: phones, and touch tablets up to 1180px, where the full nav does
   not fit. The query must match COLLAPSED_NAV in site-chrome.js. */
@media (max-width: 900px), (hover: none) and (pointer: coarse) and (max-width: 1180px) {
  .app-header {
    flex-wrap: nowrap;
    padding: .9rem max(.9rem, env(safe-area-inset-right)) .9rem max(.9rem, env(safe-area-inset-left));
    gap: .65rem;
  }

  .app-header__brand {
    --brand-size: 58px;
    min-width: 0;
  }

  .mobile-menu-toggle {
    display: inline-flex;
    position: relative;
    margin-left: auto;
  }

  .app-header__nav {
    position: absolute;
    top: calc(100% + 1px);
    left: max(.65rem, env(safe-area-inset-left));
    right: max(.65rem, env(safe-area-inset-right));
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: .2rem;
    padding: .65rem;
    max-height: 0;
    overflow: hidden;
    overscroll-behavior: contain;
    background: var(--chrome-base);
    background-image: var(--chrome-gradient);
    border-radius: 0 0 var(--chrome-radius-lg) var(--chrome-radius-lg);
    box-shadow: var(--chrome-shadow-lg);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px) scale(.985);
    transform-origin: top center;
    transition:
      opacity .22s ease,
      transform .28s cubic-bezier(.22, .61, .36, 1),
      max-height .32s cubic-bezier(.22, .61, .36, 1),
      visibility 0s linear .32s;
  }

  .app-header.nav-open .app-header__nav {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    max-height: calc(100dvh - var(--header-height, 76px) - 1rem);
    overflow-y: auto;
    transition:
      opacity .22s ease,
      transform .28s cubic-bezier(.22, .61, .36, 1),
      max-height .32s cubic-bezier(.22, .61, .36, 1),
      visibility 0s linear 0s;
  }

  .app-header__link {
    width: 100%;
    min-height: 44px;
    justify-content: flex-start;
    padding: .68rem .8rem;
    font-size: .95rem;
  }

  .app-header__link .icon {
    width: 18px;
    height: 18px;
  }

  .support-btn {
    width: 100%;
    min-height: 44px;
    justify-content: center;
    margin: .25rem 0 0;
  }

  .theme-toggle {
    width: 44px;
    height: 44px;
    margin: .15rem 0 0 auto;
  }

  .theme-toggle svg {
    width: 32px;
    height: 32px;
  }

  .mobile-menu-toggle svg {
    transition: opacity .18s ease, transform .22s ease;
  }

  .mobile-menu-toggle__menu {
    opacity: 1;
    transform: rotate(0deg) scale(1);
  }

  .mobile-menu-toggle__close {
    display: block;
    position: absolute;
    opacity: 0;
    transform: rotate(-70deg) scale(.75);
  }

  .app-header.nav-open .mobile-menu-toggle__menu {
    display: block;
    opacity: 0;
    transform: rotate(70deg) scale(.75);
  }

  .app-header.nav-open .mobile-menu-toggle__close {
    opacity: 1;
    transform: rotate(0deg) scale(1);
  }
}

@media (hover: none) and (pointer: coarse) and (min-width: 901px) and (max-width: 1180px) {
  .app-header {
    padding: .78rem max(1.1rem, env(safe-area-inset-right)) .78rem max(1.1rem, env(safe-area-inset-left));
    gap: .75rem;
  }

  .app-header__brand {
    --brand-size: 54px;
  }

  .mobile-menu-toggle {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
  }

  .app-header__nav {
    left: max(.85rem, env(safe-area-inset-left));
    right: max(.85rem, env(safe-area-inset-right));
    padding: .7rem;
  }

  .app-header__link {
    min-height: 46px;
    padding: .7rem .85rem;
    font-size: .96rem;
  }

  .support-btn {
    min-height: 46px;
  }
}

@media (max-width: 520px) {
  .app-header {
    padding-top: .78rem;
    padding-bottom: .78rem;
  }

  .app-header__brand {
    --brand-size: 52px;
  }

  .app-header__wordmark {
    font-size: calc(var(--brand-size) * .56);
  }

  .mobile-menu-toggle {
    width: 40px;
    height: 40px;
    flex-basis: 40px;
  }
}

@media (max-width: 350px) {
  .app-header {
    padding-top: .7rem;
    padding-bottom: .7rem;
  }

  .app-header__brand {
    --brand-size: 47px;
  }

  .app-header__wordmark {
    font-size: calc(var(--brand-size) * .52);
  }
}

@media (prefers-reduced-motion: reduce) {
  .app-header__nav,
  .mobile-menu-toggle svg {
    transition: none !important;
  }
}

/* ======================================================= Support Us popup */

.support-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--chrome-font);
  line-height: 1.5;
  animation: chrome-support-fade .2s ease;
}

.support-modal.hidden {
  display: none;
}

.support-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  backdrop-filter: blur(4px);
}

.support-modal__content {
  position: relative;
  z-index: 1;
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 1.5rem;
  border-radius: .5rem;
  background: var(--chrome-modal-surface);
  color: var(--chrome-modal-text);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);
}

:root[data-theme="dark"] .support-modal__content {
  border: 1px solid var(--chrome-modal-border);
}

.support-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .75rem;
}

.support-modal__title {
  margin: 0;
  color: var(--chrome-modal-text);
  font-size: 1.125rem;
  font-weight: 700;
}

.support-modal__close {
  padding: .25rem;
  border: none;
  border-radius: .25rem;
  background: none;
  color: var(--chrome-modal-muted);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: color .15s ease, background .15s ease;
}

.support-modal__close:hover {
  color: var(--chrome-modal-text);
  background: var(--chrome-modal-hover);
}

.support-modal__options {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.support-modal__option {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  border-radius: .375rem;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease;
}

.support-modal__option:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .15);
}

.support-modal__option strong {
  display: block;
  margin-bottom: 2px;
  font-size: 1rem;
}

.support-modal__option span {
  font-size: .875rem;
  opacity: .85;
}

.support-modal__option svg {
  flex-shrink: 0;
}

.support-modal__option--kofi { background: #ff5e5b; color: #fff; }
.support-modal__option--kofi:hover { background: #e54e4b; }
.support-modal__option--sub { background: #22c55e; color: #fff; }
.support-modal__option--sub:hover { background: #16a34a; }

.support-modal__author {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin: 1rem 0 .75rem;
}

.support-modal__avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--chrome-modal-border);
}

.support-modal__author-label {
  margin: 0;
  color: var(--chrome-modal-text);
  font-size: 1rem;
  font-weight: 600;
  font-style: italic;
}

.support-modal__message p {
  margin: 0 0 .5rem;
  color: var(--chrome-modal-muted);
  font-size: .875rem;
  line-height: 1.6;
}

.support-modal__message p:first-child {
  color: var(--chrome-modal-text);
  font-size: 1rem;
  font-weight: 600;
}

.support-modal__message p:last-child {
  margin-bottom: 0;
}

@keyframes chrome-support-fade {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ================================================================ footer */

.ftr {
  margin-top: 4.5rem;
  padding: 2.4rem 0 2rem;
  border-top: 0;
  background: var(--chrome-base);
  background-image: linear-gradient(
    135deg,
    color-mix(in srgb, var(--chrome-base) 88%, var(--chrome-navy) 12%),
    color-mix(in srgb, var(--chrome-base) 76%, var(--chrome-teal) 24%)
  );
  color: #fff;
  font-family: var(--chrome-font);
  font-size: .88rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.ftr__inner {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 1.5rem);
}

.ftr__top,
.ftr__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem 2rem;
}

.ftr__bottom {
  align-items: flex-end;
}

.ftr__brand {
  --footer-brand-size: 42px;
  display: inline-flex;
  align-items: center;
  gap: .18rem;
  flex: 0 0 auto;
  color: #fff;
  text-decoration: none;
}

.ftr__logo {
  width: calc(var(--footer-brand-size) * .917);
  height: calc(var(--footer-brand-size) * .917);
  object-fit: contain;
  flex: 0 0 auto;
}

.ftr__wordmark {
  font-family: var(--chrome-font);
  font-size: calc(var(--footer-brand-size) * .555);
  font-weight: 700;
  line-height: 1;
  color: #fff;
  white-space: nowrap;
}

.ftr__nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: .2rem .9rem;
}

.ftr__nav a {
  display: inline-flex;
  align-items: center;
  padding: .2rem 0;
  color: rgba(255, 255, 255, .84);
  font-size: .9rem;
  font-weight: 500;
  text-decoration: none;
  transition: color .15s ease, opacity .15s ease;
}

.ftr__nav a:hover,
.ftr__nav a:focus-visible {
  color: #fff;
}

.ftr__rule {
  height: 1px;
  margin: 1.45rem 0 1.15rem;
  background: rgba(255, 255, 255, .16);
}

.ftr__tagline {
  margin: 0;
  max-width: 34rem;
  color: rgba(255, 255, 255, .72);
  font-size: .84rem;
  line-height: 1.55;
}

.ftr__meta {
  color: rgba(255, 255, 255, .58);
  font-size: .8rem;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .ftr {
    margin-top: 3.5rem;
    padding: 2.2rem 0 1.8rem;
  }

  .ftr__brand {
    --footer-brand-size: 44px;
  }

  .ftr__top {
    align-items: flex-start;
  }

  .ftr__nav {
    gap: .25rem .8rem;
  }
}

@media (max-width: 600px) {
  .ftr {
    margin-top: 3rem;
    padding: 2rem 0 calc(1.8rem + env(safe-area-inset-bottom));
  }

  .ftr__inner {
    text-align: center;
  }

  .ftr__top,
  .ftr__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .ftr__top {
    gap: 1rem;
  }

  .ftr__bottom {
    gap: .65rem;
  }

  .ftr__brand {
    --footer-brand-size: 46px;
  }

  .ftr__nav {
    justify-content: flex-start;
    gap: .3rem 1rem;
  }

  .ftr__nav a {
    font-size: .92rem;
  }

  .ftr__rule {
    margin: 1.25rem 0 1rem;
  }

  .ftr__tagline {
    max-width: 28rem;
  }

  .ftr__meta {
    margin-top: .1rem;
  }
}

@media (max-width: 350px) {
  .ftr__inner {
    padding-left: .85rem;
    padding-right: .85rem;
  }
}