/* Site chrome: header, navigation, footer, flash messages, install toast */

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  border-bottom: 1px solid var(--line);
}

/* The blur lives on a pseudo-element: a backdrop-filter on the header itself
   would become the containing block of the fixed mobile menu. */
.site-header::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  content: "";
}

.site-header__inner {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  flex-shrink: 0;
  gap: 0.7rem;
  align-items: center;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: background-color 250ms ease, transform 400ms var(--ease);
}

.brand:hover .brand__mark {
  background: var(--accent);
  transform: rotate(-8deg);
}

.brand__name em {
  color: var(--muted);
  font-style: normal;
  font-weight: 500;
}

.site-nav {
  display: flex;
  flex: 1;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.site-nav__list {
  display: flex;
  gap: 0.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  padding: 0.55rem 0.8rem;
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
}

.site-nav__num {
  display: none;
}

.site-nav__link::after {
  position: absolute;
  right: 0.8rem;
  bottom: 0.3rem;
  left: 0.8rem;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms var(--ease);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--ink);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link[aria-current="page"]::after {
  height: 2px;
}

.site-nav__list--admin .site-nav__link {
  color: var(--muted);
  font-size: 0.78rem;
}

.site-header__tools {
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-left: auto;
}

.icon-btn {
  display: inline-grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

.icon-btn:hover {
  border-color: var(--ink);
}

/* Theme toggle: shows the icon of the theme you would switch to */
.theme-toggle__sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle__moon {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__sun {
    display: block;
  }

  :root:not([data-theme="light"]) .theme-toggle__moon {
    display: none;
  }
}

.nav-toggle {
  display: none;
  align-content: center;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 1.05rem;
  height: 1.5px;
  background: currentColor;
  transition: transform 300ms var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

/* Mobile: full-screen menu with large serif links */
@media (max-width: 991.98px) {
  .nav-toggle {
    display: inline-grid;
  }

  .site-nav {
    position: fixed;
    z-index: 1020;
    top: 4.25rem;
    right: 0;
    bottom: 0;
    left: 0;
    flex-direction: column;
    gap: 2rem;
    align-items: stretch;
    justify-content: flex-start;
    padding: 2rem 1.25rem 3rem;
    overflow-y: auto;
    background: var(--paper);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.75rem);
    transition: opacity 250ms ease, transform 350ms var(--ease), visibility 0s linear 350ms;
  }

  .nav-open .site-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity 250ms ease, transform 350ms var(--ease);
  }

  .nav-open {
    overflow: hidden;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
  }

  .site-nav__list > li {
    border-bottom: 1px solid var(--line);
  }

  .site-nav__link {
    display: flex;
    gap: 1rem;
    align-items: baseline;
    padding: 1rem 0;
    color: var(--ink);
    font-family: var(--font-serif);
    font-size: clamp(2rem, 9vw, 2.8rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.1;
  }

  .site-nav__num {
    display: inline;
    color: var(--accent-dark);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0;
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link[aria-current="page"] {
    color: var(--accent);
    font-style: italic;
  }

  .site-nav__list--admin .site-nav__link {
    font-family: var(--font-sans);
    font-size: 0.95rem;
  }
}

@media (max-width: 420px) {
  .brand__name em {
    display: none;
  }
}

/* Flash messages */
.flash-stack {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.flash {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  padding: 0.8rem 1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--flash-color, var(--info));
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
}

.flash > i {
  color: var(--flash-color, var(--info));
}

.flash p {
  flex: 1;
  margin: 0;
}

.flash--success { --flash-color: var(--success); }
.flash--danger { --flash-color: var(--danger); }
.flash--warning { --flash-color: var(--warning); }
.flash--info { --flash-color: var(--info); }

.flash__close {
  padding: 0.2rem 0.4rem;
  border: 0;
  background: transparent;
  color: var(--muted);
}

.flash__close:hover {
  color: var(--ink);
}

/* Footer */
.site-footer {
  flex-shrink: 0;
  margin-top: var(--space-section);
  padding: clamp(3rem, 7vw, 4.5rem) 0 2rem;
  border-top: 1px solid var(--ink);
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 1fr);
  gap: 2.5rem clamp(2rem, 6vw, 5rem);
}

.site-footer__tagline {
  max-width: 18ch;
  margin: 1.5rem 0 1rem;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.site-footer__note {
  max-width: 42ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer__title {
  margin-bottom: 1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-footer__title--spaced {
  margin-top: 1.75rem;
}

.site-footer ul {
  display: grid;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer ul a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-footer ul a:hover {
  color: var(--accent-dark);
}

.site-footer__socials {
  margin: 1rem 0 1.25rem !important;
}

.site-footer__socials i {
  width: 1.2rem;
  color: var(--muted);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  margin-top: clamp(2.5rem, 6vw, 4rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.site-footer__bottom a {
  color: var(--muted);
  text-decoration: none;
}

.site-footer__bottom a:hover {
  color: var(--ink);
}

.site-footer__top {
  margin-left: auto;
}

@media (max-width: 767.98px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__intro {
    grid-column: 1 / -1;
  }
}

@media (max-width: 479.98px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

/* PWA install toast */
.install-toast {
  position: fixed;
  z-index: 1050;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
  max-width: min(26rem, calc(100vw - 2rem));
  padding: 1.1rem 1.25rem;
  background: var(--band);
  color: var(--band-ink);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
  animation: toast-in 450ms var(--ease);
}

.install-toast[hidden] {
  display: none;
}

.install-toast p {
  margin: 0;
}

.install-toast__title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
}

.install-toast__text {
  color: var(--band-muted);
  font-size: 0.82rem;
}

.install-toast__actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.install-toast__later {
  padding: 0.4rem 0.6rem;
  border: 0;
  background: transparent;
  color: var(--band-muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.install-toast__later:hover {
  color: var(--band-ink);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(1rem); }
}