/* Site chrome: the one header and footer every page shares.
   Loaded last on every page, after the page's own stylesheet (home.css, or
   styles.css + refresh.css, or a standalone page's inline styles). It reads the
   Tidepool tokens from whichever system the page uses and falls back to the
   literal values, so the header and footer look identical everywhere.
   Behavior lives in assets/js/chrome.js. */

.site-header,
.site-footer {
  --chrome-ground: var(--mist, var(--bg, #F0F5F3));
  --chrome-surface: var(--surface, #FFFFFF);
  --chrome-tint: var(--sea-glass, var(--surface-2, #E9F1ED));
  --chrome-line: var(--line, var(--border, #D4E0DC));
  --chrome-line-soft: var(--line-soft, var(--border-soft, #E2EAE7));
  --chrome-ink: var(--ink, #15393C);
  --chrome-ink-soft: var(--ink-soft, #3D5A5A);
  --chrome-ink-muted: var(--ink-muted, #4E6564);
  --chrome-action: var(--teal, var(--primary, #1E5F62));
  --chrome-action-ink: var(--btn-primary-ink, var(--primary-ink, #FFFFFF));
  --chrome-mark: var(--coral, var(--warm, #DE7356));
  --chrome-focus: var(--coral-deep, var(--accent-brown, #9C4429));
  --chrome-display: var(--font-display, "Bricolage Grotesque", "Avenir Next", "Helvetica Neue", sans-serif);
  --chrome-body: var(--font-body, "Source Serif 4", Georgia, serif);
  --chrome-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --chrome-t: 240ms var(--chrome-ease);
}

:root {
  --header-h: 72px;
  --header-height: 72px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--chrome-ground) 88%, transparent);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  box-shadow: none;
  transition: border-color var(--chrome-t), box-shadow var(--chrome-t);
}
.site-header.is-scrolled {
  background: color-mix(in oklab, var(--chrome-ground) 94%, transparent);
  border-bottom-color: var(--chrome-line);
  box-shadow: 0 10px 28px -24px rgba(14, 42, 45, 0.5);
}
.site-header .site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6, 1.5rem);
  height: var(--header-h);
}
.site-header :focus-visible,
.site-footer :focus-visible {
  outline: 2.5px solid var(--chrome-focus);
  outline-offset: 3px;
  border-radius: 8px;
}

/* Brand */
.site-header .brand,
.site-footer .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  color: var(--chrome-ink);
  font-weight: 600;
  letter-spacing: 0;
  text-decoration: none;
}
.site-header .brand:hover { color: var(--chrome-ink); }
.site-header .brand__mark,
.site-footer .brand__mark {
  width: 36px;
  height: 36px;
  padding: 3px;
  border-radius: 50%;
  object-fit: contain;
  background: var(--chrome-surface);
  border: 1px solid var(--chrome-line-soft);
  box-shadow: none;
}
[data-theme="dark"] .site-header .brand__mark {
  background: transparent;
  border-color: transparent;
  content: url("/assets/img/original-logo-mark-no-words-transparent.png");
}
.site-header .brand__name,
.site-footer .brand__name {
  font-family: var(--chrome-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}

/* Nav */
.site-header .nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-header .nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-header .nav__list > li { margin: 0; }
.site-header .nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  color: var(--chrome-ink-soft);
  background: none;
  border-radius: 8px;
  font-family: var(--chrome-display);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--chrome-t);
}
.site-header .nav__link::after {
  content: "";
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: var(--chrome-mark);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--chrome-t);
}
.site-header .nav__link:hover {
  color: var(--chrome-ink);
  background: none;
}
.site-header .nav__link:hover::after,
.site-header .nav__link[aria-current="page"]::after,
.site-header .nav__summary.is-current::after { transform: scaleX(1); }
.site-header .nav__link[aria-current="page"],
.site-header .nav__summary.is-current { color: var(--chrome-ink); background: none; }

/* Free tools menu (details/summary: works without JS, closes via chrome.js) */
.site-header .nav__details { position: relative; }
.site-header .nav__summary {
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
}
.site-header .nav__summary::-webkit-details-marker { display: none; }
.site-header .nav__summary::marker { content: ""; }
.site-header .nav__chev {
  width: 12px;
  height: 12px;
  opacity: 0.7;
  transition: transform var(--chrome-t);
}
.site-header .nav__details[open] .nav__chev { transform: rotate(180deg); }
.site-header .nav__details[open] .nav__summary { color: var(--chrome-ink); }

.site-header .nav__menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  width: 344px;
  padding: 0.5rem;
  background: var(--chrome-surface);
  border: 1px solid var(--chrome-line);
  border-radius: 16px;
  box-shadow: 0 28px 56px -28px rgba(14, 42, 45, 0.38), 0 2px 6px -2px rgba(14, 42, 45, 0.08);
  transform: translateX(-50%);
}
.site-header .nav__submenu {
  display: grid;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-header .nav__submenu li { margin: 0; }
.site-header .nav__submenu-link {
  display: grid;
  gap: 2px;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  text-decoration: none;
  transition: background-color 160ms var(--chrome-ease);
}
.site-header .nav__submenu-link:hover,
.site-header .nav__submenu-link[aria-current="page"] { background: var(--chrome-tint); }
.site-header .nav__submenu-title {
  color: var(--chrome-ink);
  font-family: var(--chrome-display);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.25;
}
.site-header .nav__submenu-desc {
  color: var(--chrome-ink-muted);
  font-family: var(--chrome-body);
  font-size: 0.875rem;
  line-height: 1.4;
}
.site-header .nav__menu-all {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.35rem;
  padding: 0.75rem 0.8rem 0.4rem;
  border-top: 1px solid var(--chrome-line-soft);
  color: var(--chrome-action);
  font-family: var(--chrome-display);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
}
.site-header .nav__menu-all span { transition: transform var(--chrome-t); }
.site-header .nav__menu-all:hover span { transform: translateX(3px); }

@media (prefers-reduced-motion: no-preference) {
  .site-header .nav__details[open] .nav__menu { animation: chrome-menu-in 200ms var(--chrome-ease); }
}
@keyframes chrome-menu-in {
  from { opacity: 0; transform: translate(-50%, -6px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Account link + primary action sit apart from the section links */
.site-header .nav__auth {
  display: flex;
  align-items: center;
  margin-left: 0.5rem;
}
.site-header .nav__auth::before {
  content: "";
  width: 1px;
  height: 20px;
  margin-right: 0.5rem;
  background: var(--chrome-line);
}
.site-header .nav__cta { margin-left: 0.25rem; }
.site-header .nav__cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.55rem 1.15rem;
  border: 1.5px solid transparent;
  border-radius: 999px;
  background: var(--chrome-action);
  color: var(--chrome-action-ink);
  box-shadow: 0 10px 22px -16px rgba(30, 95, 98, 0.7);
  font-family: var(--chrome-display);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--chrome-t), transform 140ms var(--chrome-ease), box-shadow var(--chrome-t);
}
.site-header .nav__cta .btn:hover {
  background: var(--teal-soft, var(--primary-hover, #2E7A77));
  color: var(--chrome-action-ink);
  transform: translateY(-1px);
}

/* Theme + menu buttons */
.site-header .theme-toggle,
.site-header .nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--chrome-line);
  border-radius: 999px;
  background: var(--chrome-surface);
  color: var(--chrome-ink-soft);
  cursor: pointer;
  transition: color var(--chrome-t), border-color var(--chrome-t), transform 140ms var(--chrome-ease);
}
.site-header .theme-toggle:hover { color: var(--chrome-ink); border-color: var(--chrome-ink-muted); transform: rotate(-12deg); }
.site-header .theme-toggle__sun { display: none; }
[data-theme="dark"] .site-header .theme-toggle__sun { display: block; }
[data-theme="dark"] .site-header .theme-toggle__moon { display: none; }

.site-header .nav-toggle { display: none; color: var(--chrome-ink); }
.site-header .nav-toggle__bars { position: relative; display: block; width: 18px; height: 12px; }
.site-header .nav-toggle__bars::before,
.site-header .nav-toggle__bars::after,
.site-header .nav-toggle__bars span {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--chrome-t), opacity var(--chrome-t), top var(--chrome-t);
}
.site-header .nav-toggle__bars::before { top: 0; }
.site-header .nav-toggle__bars span { top: 5px; }
.site-header .nav-toggle__bars::after { top: 10px; }
.site-header .nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.site-header .nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 5px; transform: rotate(-45deg); }
.site-header .nav-toggle[aria-expanded="true"] .nav-toggle__bars span { opacity: 0; }

/* ---------- Header: menu layout below 1000px ---------- */
@media (max-width: 1000px) {
  /* The menu button comes first in the DOM so focus moves from it straight into
     the open list; visually it sits at the far right. */
  .site-header .theme-toggle { order: 1; }
  .site-header .nav-toggle { display: inline-flex; order: 2; }
  .site-header .nav__list {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    overscroll-behavior: contain;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem clamp(1rem, 4vw, 2.25rem) 1.5rem;
    background: var(--chrome-ground);
    border-bottom: 1px solid var(--chrome-line);
    box-shadow: 0 32px 64px -30px rgba(14, 42, 45, 0.4);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--chrome-t), opacity var(--chrome-t), visibility 0s linear 240ms;
  }
  .site-header .nav.is-open .nav__list {
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: transform var(--chrome-t), opacity var(--chrome-t), visibility 0s;
  }
  .site-header .nav__list > li { border-bottom: 1px solid var(--chrome-line-soft); }
  .site-header .nav__link {
    width: 100%;
    min-height: 54px;
    padding: 0.75rem 0.25rem;
    border-radius: 0;
    font-size: 1.0625rem;
  }
  .site-header .nav__link::after { display: none; }
  .site-header .nav__link[aria-current="page"],
  .site-header .nav__summary.is-current { font-weight: 600; }
  .site-header .nav__link[aria-current="page"]::before,
  .site-header .nav__summary.is-current::before {
    content: "";
    width: 6px;
    height: 6px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--chrome-mark);
  }
  .site-header .nav__summary { justify-content: flex-start; }
  .site-header .nav__summary .nav__chev { margin-left: auto; }
  .site-header .nav__chev { width: 14px; height: 14px; }
  .site-header .nav__menu {
    position: static;
    width: auto;
    padding: 0 0 0.75rem;
    background: none;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    transform: none;
    animation: none !important;
  }
  .site-header .nav__submenu-link { padding: 0.6rem 0.75rem; }
  .site-header .nav__menu-all { margin-top: 0.25rem; padding: 0.6rem 0.75rem; border-top: 0; }
  .site-header .nav__auth { margin: 0; }
  .site-header .nav__auth::before { display: none; }
  .site-header .nav__list > .nav__cta { margin: 1.25rem 0 0; border-bottom: 0; }
  .site-header .nav__cta .btn { width: 100%; min-height: 52px; font-size: 1rem; }
}

@media (max-width: 720px) {
  :root { --header-h: 64px; --header-height: 64px; }
}
@media (max-width: 420px) {
  .site-header .brand__name { font-size: 1rem; }
  .site-header .site-header__inner { gap: 0.75rem; }
}

/* ---------- Footer ---------- */
.site-footer {
  --chrome-on-dark: #EDF4F1;
  --chrome-on-dark-soft: #BCD2CC;
  --chrome-on-dark-muted: #9DB5AF;
  --chrome-on-dark-line: rgba(237, 244, 241, 0.14);
  padding: clamp(3.5rem, 7vw, 5rem) 0 2rem;
  background: #0E2A2D;
  border-top: 0;
  color: var(--chrome-on-dark);
}
[data-theme="dark"] .site-footer {
  background: #0A1F1E;
  border-top: 1px solid var(--chrome-on-dark-line);
}
.site-footer :focus-visible { outline-color: #E78D6F; }
.site-footer .site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.1fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}
.site-footer .brand,
.site-footer .brand:hover,
.site-footer .brand__name { color: #FFFFFF; }
.site-footer .brand__mark {
  background: rgba(255, 255, 255, 0.94);
  border-color: var(--chrome-on-dark-line);
}
.site-footer .site-footer__tag {
  max-width: 30ch;
  margin: 1.1rem 0 0;
  color: var(--chrome-on-dark-soft);
  font-family: var(--chrome-body);
  font-size: 0.9375rem;
  line-height: 1.6;
}
.site-footer .footer-ig {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  color: var(--chrome-on-dark-soft);
  font-family: var(--chrome-display);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--chrome-t);
}
.site-footer .footer-ig:hover { color: #FFFFFF; }

.site-footer .site-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2rem;
}
.site-footer .site-footer__heading {
  margin: 0 0 1rem;
  color: #FFFFFF;
  font-family: var(--chrome-display);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.3;
  text-transform: none;
}
.site-footer .footer-list {
  display: grid;
  gap: 0.7rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer .footer-list li { margin: 0; }
.site-footer .footer-list a {
  color: var(--chrome-on-dark-soft);
  font-family: var(--chrome-display);
  font-size: 0.9375rem;
  font-weight: 400;
  line-height: 1.35;
  text-decoration: none;
  transition: color var(--chrome-t);
}
.site-footer .footer-list a:hover,
.site-footer .footer-list a[aria-current="page"] { color: #FFFFFF; }

.site-footer .footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--chrome-on-dark-line);
  color: var(--chrome-on-dark-muted);
  font-family: var(--chrome-body);
  font-size: 0.8125rem;
  line-height: 1.5;
}
.site-footer .footer-bottom p { margin: 0; color: inherit; font-size: inherit; max-width: none; }
.site-footer .footer-bottom a {
  color: var(--chrome-on-dark-soft);
  text-decoration: underline;
  text-decoration-color: var(--chrome-on-dark-line);
  text-underline-offset: 3px;
  transition: color var(--chrome-t), text-decoration-color var(--chrome-t);
}
.site-footer .footer-bottom a:hover { color: #FFFFFF; text-decoration-color: currentColor; }

@media (max-width: 900px) {
  .site-footer .site-footer__inner { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .site-footer .site-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 1.5rem; }
}

@media print {
  .site-header,
  .site-footer { display: none; }
}