/* ==========================================================================
   School Life — layout.css
   Header, mega menu, mobile drawer, footer, sections, breadcrumbs, grids.
   Mobile-first. Breakpoints: 576 / 768 / 992 / 1200.
   ========================================================================== */

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background-color: var(--color-bg);
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur) ease, box-shadow var(--dur) ease,
    border-color var(--dur) ease;
}

.site-header.is-scrolled {
  background-color: var(--color-header-bg);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

/* Reserve space before JS paints the header to avoid layout shift */
#site-header:empty {
  min-height: var(--header-h);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--header-h);
}

/* ---------- Brand ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: var(--tap);
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  color: var(--color-heading);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-sm);
}

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

.brand__logo {
  width: 38px;
  height: 38px;
  transition: transform var(--dur-slow) var(--ease-spring);
}

.brand:hover .brand__logo {
  transform: rotate(-8deg) scale(1.06);
}

.brand__logo .logo-stop-1 { stop-color: var(--color-logo-1); }
.brand__logo .logo-stop-2 { stop-color: var(--color-logo-2); }
.brand__logo .logo-fg { fill: var(--color-on-logo); }
.brand__logo .logo-line { stroke: var(--color-on-logo); }
.brand__logo .logo-tassel { stroke: var(--color-accent); }
.brand__logo .logo-tassel-dot { fill: var(--color-accent); }

.brand__accent {
  background: var(--gradient-brand-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---------- Primary nav (desktop) ---------- */
.nav {
  display: none;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: var(--tap);
  padding: 0.5rem 0.9rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: var(--fw-medium);
  text-decoration: none;
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}

.nav__link:hover {
  color: var(--color-heading);
  background: var(--color-surface-2);
}

.nav__link.is-active,
.nav__link[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav__link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--dur) var(--ease-out);
}

.nav__trigger[aria-expanded="true"] {
  color: var(--color-heading);
  background: var(--color-surface-2);
}

.nav__trigger.is-active[aria-expanded="true"] {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.nav__trigger[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

/* ---------- Header actions ---------- */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-width: var(--tap);
  min-height: var(--tap);
  padding: 0 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  transition: border-color var(--dur-fast) ease, color var(--dur-fast) ease,
    box-shadow var(--dur-fast) ease;
}

.search-trigger:hover {
  border-color: var(--color-border-strong);
  color: var(--color-heading);
}

.search-trigger svg {
  width: 18px;
  height: 18px;
}

.search-trigger__text,
.search-trigger__kbd {
  display: none;
}

/* Prefixed with .header__actions so these beat .btn / .icon-btn in components.css */
.header__actions .header-login {
  display: none;
}

.header-login.is-signed-in .avatar {
  width: 24px;
  height: 24px;
  font-size: 0.7rem;
  margin-left: -0.35rem;
}

/* Theme toggle — animated sun / moon */
.theme-toggle {
  position: relative;
  overflow: hidden;
}

.theme-toggle svg {
  position: absolute;
  width: 20px;
  height: 20px;
  transition: transform 0.5s var(--ease-spring), opacity var(--dur) ease;
}

[data-theme="dark"] .theme-toggle .icon-sun,
:root:not([data-theme="dark"]) .theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(-120deg) scale(0.4);
}

[data-theme="dark"] .theme-toggle .icon-moon,
:root:not([data-theme="dark"]) .theme-toggle .icon-sun {
  opacity: 1;
  transform: none;
}

@media (min-width: 576px) {
  .header__actions .header-login {
    display: inline-flex;
  }
}

@media (min-width: 768px) {
  .search-trigger {
    justify-content: flex-start;
    width: 200px;
    padding: 0 0.6rem 0 0.8rem;
  }

  .search-trigger__text {
    display: inline;
    flex: 1;
    text-align: left;
  }

  .search-trigger__kbd {
    display: inline-flex;
  }
}

@media (min-width: 992px) {
  .nav {
    display: block;
    margin-left: var(--space-6);
  }

  .header__actions .nav-toggle {
    display: none;
  }
}

@media (min-width: 1200px) {
  .search-trigger {
    width: 240px;
  }
}

/* ==========================================================================
   Mega menu (desktop, ≥ 992px)
   ========================================================================== */
.mega {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: var(--z-dropdown);
  pointer-events: none;
  visibility: hidden;
  opacity: 0;
  transform: translate3d(0, -10px, 0);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out),
    visibility 0s linear var(--dur);
}

.mega.is-open {
  visibility: visible;
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}

.mega.is-open .mega__panel {
  pointer-events: auto;
}

.mega__panel {
  margin-top: var(--space-2);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  background-image: var(--gradient-soft);
  box-shadow: var(--shadow-xl);
  max-height: calc(100vh - var(--header-h) - var(--space-8));
  overflow-y: auto;
  overscroll-behavior: contain;
}

.mega__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6) var(--space-5);
}

@media (min-width: 1200px) {
  .mega__grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.mega__heading {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  padding: 0 var(--space-2) var(--space-2);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.mega__heading svg {
  width: 16px;
  height: 16px;
  color: var(--cat-color);
}

.mega__col.is-active .mega__heading {
  color: var(--cat-color);
  border-bottom-color: var(--cat-color);
}

.mega__list {
  display: grid;
  gap: var(--space-1);
}

.mega__link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text);
  text-decoration: none;
  transition: background-color var(--dur-fast) ease, transform var(--dur-fast) ease;
}

.mega__link:hover,
.mega__link:focus-visible {
  background: var(--color-surface-2);
  color: var(--color-heading);
}

.mega__link:hover .tool-icon {
  transform: scale(1.06);
}

.mega__link[aria-current="page"] {
  background: var(--cat-soft);
}

.mega__text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.mega__name {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  line-height: 1.3;
  color: var(--color-heading);
}

.mega__desc {
  font-size: var(--fs-xs);
  line-height: 1.45;
  color: var(--color-text-subtle);
}

.mega__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.mega__all {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: var(--tap);
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  font-weight: var(--fw-semibold);
  text-decoration: none;
}

.mega__all:hover {
  background: var(--color-primary-soft);
}

.mega__all svg {
  width: 18px;
  height: 18px;
  transition: transform var(--dur) var(--ease-out);
}

.mega__all:hover svg {
  transform: translateX(4px);
}

.mega__hint {
  font-size: var(--fs-xs);
  color: var(--color-text-subtle);
}

/* ==========================================================================
   Mobile drawer (< 992px)
   ========================================================================== */
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: var(--color-overlay);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-slow) ease, visibility 0s linear var(--dur-slow);
}

.drawer-overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-drawer);
  display: flex;
  flex-direction: column;
  width: min(88vw, 380px);
  height: 100vh;
  height: 100dvh;
  background: var(--color-surface);
  box-shadow: var(--shadow-xl);
  transform: translate3d(100%, 0, 0);
  visibility: hidden;
  transition: transform var(--dur-slow) var(--ease-out), visibility 0s linear var(--dur-slow);
}

.drawer.is-open {
  transform: none;
  visibility: visible;
  transition-delay: 0s;
}

@media (min-width: 992px) {
  .drawer,
  .drawer-overlay {
    display: none;
  }
}

.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  min-height: var(--header-h);
}

.drawer__body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--space-3) var(--space-3) var(--space-6);
}

.drawer__foot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.drawer__link,
.drawer-acc__btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  min-height: 48px;
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-heading);
  font-weight: var(--fw-semibold);
  text-align: left;
  text-decoration: none;
}

.drawer__link:hover,
.drawer-acc__btn:hover {
  background: var(--color-surface-2);
  color: var(--color-heading);
}

.drawer__link[aria-current="page"] {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.drawer__label {
  margin: var(--space-4) var(--space-3) var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-subtle);
}

.drawer-acc__btn .tool-icon {
  width: 32px;
  height: 32px;
}

.drawer-acc__name {
  flex: 1;
}

.drawer-acc__count {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-subtle);
}

.drawer-acc__chev {
  width: 18px;
  height: 18px;
  color: var(--color-text-subtle);
  transition: transform var(--dur) var(--ease-out);
}

.drawer-acc__btn[aria-expanded="true"] .drawer-acc__chev {
  transform: rotate(180deg);
}

.drawer-acc__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease-out);
}

.drawer-acc__panel.is-open {
  grid-template-rows: 1fr;
}

.drawer-acc__inner {
  min-height: 0;
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear var(--dur);
}

.drawer-acc__panel.is-open .drawer-acc__inner {
  visibility: visible;
  transition-delay: 0s;
}

.drawer-acc__list {
  display: grid;
  gap: 2px;
  margin: var(--space-1) 0 var(--space-2) calc(var(--space-3) + 16px);
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-border);
}

.drawer-acc__list a {
  display: flex;
  align-items: center;
  min-height: var(--tap);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  text-decoration: none;
}

.drawer-acc__list a:hover {
  background: var(--color-surface-2);
  color: var(--color-heading);
}

.drawer-acc__list a[aria-current="page"] {
  color: var(--cat-color);
  background: var(--cat-soft);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer__top {
  display: grid;
  gap: var(--space-2);
  padding-block: var(--space-12) var(--space-8);
}

.footer__brand {
  padding-bottom: var(--space-6);
}

.footer__brand p {
  max-width: 34ch;
  margin-top: var(--space-3);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.social {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

.social__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap);
  height: var(--tap);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease,
    transform var(--dur-fast) ease, background-color var(--dur-fast) ease;
}

.social__link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  transform: translateY(-2px);
}

.social__link svg {
  width: 20px;
  height: 20px;
}

.footer__col {
  display: grid;
  align-content: start;
  gap: var(--space-2);
}

.footer__group {
  border-bottom: 1px solid var(--color-border);
}

.footer__heading {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0;
}

.footer__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  width: 100%;
  min-height: 52px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-heading);
  font-weight: inherit;
  text-align: left;
}

.footer__toggle svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-subtle);
  transition: transform var(--dur) var(--ease-out);
}

.footer__group.is-open .footer__toggle svg {
  transform: rotate(180deg);
}

.footer__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease-out);
}

.footer__group.is-open .footer__panel {
  grid-template-rows: 1fr;
}

.footer__links {
  display: grid;
  gap: var(--space-1);
  min-height: 0;
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear var(--dur);
}

.footer__group.is-open .footer__links {
  padding-bottom: var(--space-4);
  visibility: visible;
  transition-delay: 0s;
}

.footer__links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  text-decoration: none;
}

.footer__links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer__links a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: var(--fw-semibold);
}

.footer__bottom {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-6);
  padding-block: var(--space-4);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.footer__bottom-inner p {
  margin: 0;
}

.footer__made svg {
  display: inline-block;
  width: 14px;
  height: 14px;
  vertical-align: -2px;
  color: var(--color-danger);
}

@media (min-width: 768px) {
  .footer__top {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-8) var(--space-6);
    padding-block: var(--space-16) var(--space-10);
  }

  .footer__brand {
    grid-column: 1 / -1;
    padding-bottom: 0;
  }

  .footer__col {
    gap: var(--space-6);
  }

  .footer__group {
    border-bottom: 0;
  }

  .footer__toggle {
    min-height: 0;
    margin-bottom: var(--space-3);
    pointer-events: none;
    cursor: default;
  }

  .footer__toggle svg {
    display: none;
  }

  .footer__panel,
  .footer__group .footer__panel {
    grid-template-rows: 1fr;
  }

  .footer__group .footer__links {
    padding-bottom: 0;
  }
}

@media (min-width: 992px) {
  .footer__top {
    grid-template-columns: 1.5fr repeat(4, minmax(0, 1fr));
  }

  .footer__brand {
    grid-column: auto;
    padding-right: var(--space-6);
  }
}

/* ==========================================================================
   Sections & page heroes
   ========================================================================== */
.section {
  position: relative;
  padding-block: var(--section-y);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--tight {
  padding-block: calc(var(--section-y) * 0.6);
}

.section__head {
  max-width: 720px;
  margin: 0 auto var(--space-10);
  text-align: center;
}

.section__head p {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
}

.section__head--left {
  margin-inline: 0;
  text-align: left;
}

.section-head-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  margin-bottom: var(--space-6);
}

.section-head-row h2 {
  margin: 0;
}

.page-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3rem, 2rem + 5vw, 5.5rem);
  background: var(--gradient-hero), var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.page-hero h1 {
  font-size: var(--fs-3xl);
}

.page-hero .lead {
  max-width: 640px;
  margin-inline: auto;
}

/* ---------- Breadcrumbs ---------- */
.breadcrumb {
  padding-block: var(--space-4) var(--space-2);
  font-size: var(--fs-sm);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb--center ol {
  justify-content: center;
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-subtle);
}

.breadcrumb li + li::before {
  content: "›";
  margin-inline: var(--space-2);
  color: var(--color-text-subtle);
}

.breadcrumb a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.breadcrumb [aria-current="page"] {
  color: var(--color-heading);
  font-weight: var(--fw-semibold);
}

/* ---------- Grids ---------- */
.grid {
  display: grid;
  gap: var(--grid-gap, var(--space-6));
}

.grid--auto {
  grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
}

@media (min-width: 576px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 992px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}