/* Serenity — layout.css
   Header, footer, page scaffolding. */

.serenity-shell {
  width: 100%;
  max-width: var(--serenity-shell-max);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}
.serenity-shell--narrow {
  max-width: calc(var(--serenity-content-max) + 2.5rem);
}

.serenity-main {
  display: block;
  padding-block: clamp(2.5rem, 5vw, 5rem) var(--serenity-space-section);
  min-height: 60vh;
}
.serenity-main:focus { outline: none; }

/* ===== Header ===== */
.serenity-site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--serenity-bg) 86%, transparent);
  border-bottom: 1px solid transparent;
  transition: background var(--serenity-duration) var(--serenity-ease),
              border-color var(--serenity-duration) var(--serenity-ease),
              backdrop-filter var(--serenity-duration) var(--serenity-ease);
}
.serenity-site-header.is-scrolled {
  background: color-mix(in oklab, var(--serenity-bg) 78%, transparent);
  border-bottom-color: var(--serenity-border);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  backdrop-filter: saturate(140%) blur(14px);
}
.serenity-site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  min-height: var(--serenity-header-h);
}

.serenity-site-header__brand {
  display: flex;
  align-items: center;
}
.serenity-site-header__brand .custom-logo-link {
  display: inline-flex;
  align-items: center;
}
.serenity-site-header__brand img,
.serenity-site-header__brand .custom-logo {
  max-height: 36px;
  width: auto;
}
.serenity-brand--text {
  font-family: var(--serenity-font-serif);
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: 0.01em;
}
.serenity-brand--text:hover { color: var(--serenity-text); }

/* Primary nav (desktop) */
.serenity-primary-nav {
  display: none;
  justify-content: flex-end;
}
.serenity-primary-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.serenity-primary-menu a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  color: var(--serenity-text);
}
.serenity-primary-menu a:hover { color: var(--serenity-accent); }
.serenity-primary-menu .current-menu-item > a,
.serenity-primary-menu [aria-current="page"] {
  color: var(--serenity-accent);
}

/* Header tools (right) */
.serenity-header-tools {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* Mode toggle */
.serenity-mode-toggle {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  color: var(--serenity-text);
  position: relative;
  transition: background var(--serenity-duration) var(--serenity-ease);
}
.serenity-mode-toggle:hover {
  background: color-mix(in oklab, var(--serenity-surface), var(--serenity-border) 60%);
}
.serenity-mode-toggle__icon {
  display: inline-grid;
  place-items: center;
  transition: opacity var(--serenity-duration) var(--serenity-ease), transform var(--serenity-duration) var(--serenity-ease);
}
.serenity-mode-toggle__icon--moon {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: rotate(-90deg);
}
html[data-theme="dark"] .serenity-mode-toggle__icon--sun {
  opacity: 0;
  transform: rotate(90deg);
}
html[data-theme="dark"] .serenity-mode-toggle__icon--moon {
  opacity: 1;
  transform: rotate(0);
}
.serenity-mode-toggle__text { display: none; }

/* Menu trigger (mobile hamburger) */
.serenity-menu-trigger {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  color: var(--serenity-text);
}
.serenity-menu-trigger:hover {
  background: color-mix(in oklab, var(--serenity-surface), var(--serenity-border) 60%);
}

/* Desktop breakpoint */
@media (min-width: 880px) {
  .serenity-primary-nav { display: flex; }
  .serenity-menu-trigger { display: none; }
}

/* ===== Overlay menu (mobile) ===== */
.serenity-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: var(--serenity-bg);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 260ms var(--serenity-ease);
}
.serenity-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}
.serenity-overlay[hidden] { display: none; }
.serenity-overlay__inner {
  width: min(540px, 90vw);
  text-align: center;
  display: grid;
  gap: 2rem;
}
.serenity-overlay__close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  color: var(--serenity-text);
}
.serenity-overlay__close:hover {
  background: color-mix(in oklab, var(--serenity-surface), var(--serenity-border) 60%);
}
.serenity-overlay-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.25rem;
}
.serenity-overlay-menu a {
  font-family: var(--serenity-font-serif);
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  text-decoration: none;
  padding: 0.25rem 0;
  display: inline-block;
}
.serenity-overlay__tools {
  display: flex;
  justify-content: center;
  padding-top: 1rem;
  border-top: 1px solid var(--serenity-border);
}
.serenity-overlay .serenity-mode-toggle--in-overlay {
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  border: 1px solid var(--serenity-border);
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__text {
  display: inline;
  font-size: 0.875rem;
}
.serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__icon--moon {
  position: static;
}
.serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__icon--sun,
.serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__icon--moon {
  transform: none;
  opacity: 1;
}
html[data-theme="dark"] .serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__icon--sun {
  display: none;
}
html:not([data-theme="dark"]) .serenity-overlay .serenity-mode-toggle--in-overlay .serenity-mode-toggle__icon--moon {
  display: none;
}

/* Body scroll lock when overlay is open */
body.serenity-no-scroll {
  overflow: hidden;
}

/* ===== Footer ===== */
.serenity-site-footer {
  border-top: 1px solid var(--serenity-border);
  padding-block: var(--serenity-space-section) 2.5rem;
  margin-top: var(--serenity-space-section);
  background: var(--serenity-bg);
}
.serenity-site-footer__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
}
@media (min-width: 760px) {
  .serenity-site-footer__cols {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 4rem;
  }
}
.serenity-site-footer__col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.serenity-site-footer__brand-col .serenity-brand--text,
.serenity-site-footer__brand-col .custom-logo-link {
  display: inline-block;
  margin-bottom: 0.25rem;
}
.serenity-site-footer__brand-col img,
.serenity-site-footer__brand-col .custom-logo {
  max-height: 36px;
  width: auto;
}
.serenity-site-footer__tagline {
  color: var(--serenity-text-muted);
  max-width: 32ch;
  margin: 0;
  font-size: 0.95rem;
}
.serenity-footer-menu,
.serenity-legal-menu {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.serenity-footer-menu a,
.serenity-legal-menu a {
  text-decoration: none;
  color: var(--serenity-text-muted);
  font-size: 0.95rem;
}
.serenity-footer-menu a:hover,
.serenity-legal-menu a:hover {
  color: var(--serenity-accent);
}

.serenity-socials {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.serenity-socials a {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--serenity-border);
  color: var(--serenity-text-muted);
  text-decoration: none;
  transition: color var(--serenity-duration) var(--serenity-ease), border-color var(--serenity-duration) var(--serenity-ease);
}
.serenity-socials a:hover {
  color: var(--serenity-accent);
  border-color: var(--serenity-accent);
}

.serenity-site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--serenity-border);
  color: var(--serenity-text-muted);
  font-size: 0.875rem;
}
.serenity-site-footer__copy { margin: 0; }
.serenity-legal-menu {
  flex-direction: row;
  gap: 1.5rem;
}