/* ============================================================
   LAYOUT — The Ai Toolz
   Container, header, mega-menu, mobile drawer, footer,
   tool card grid, page-level layout helpers.
   ============================================================ */

/* ── Site wrapper ── */
.site-wrapper {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
.site-content {
  flex: 1 1 auto;
  padding-block: var(--space-8) var(--space-16);
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--pad-mobile);
}
@media (min-width: 768px)  { .container { padding-inline: var(--pad-tablet); } }
@media (min-width: 1024px) { .container { padding-inline: var(--pad-desktop); } }

/* ── Site Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--header-h-mob);
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(14px) saturate(1.6);
  -webkit-backdrop-filter: blur(14px) saturate(1.6);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--trans-fast), border-color var(--trans-fast);
}
@media (min-width: 1024px) { .site-header { height: var(--header-h); } }

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 100%;
}

/* ── Logo ── */
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  padding: var(--space-1);
  margin-left: calc(-1 * var(--space-1));
}
.site-logo:hover  { text-decoration: none; }
.site-logo:focus-visible { outline-offset: 3px; }

.site-logo__mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}
.site-logo__wordmark {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: 1;
}
.site-logo__wordmark em {
  font-style: normal;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Primary nav (desktop) ── */
.site-header__nav {
  display: none;
  align-items: center;
  gap: var(--space-1);
  margin-left: var(--space-2);
}
@media (min-width: 1024px) { .site-header__nav { display: flex; } }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--trans-fast), background var(--trans-fast);
  text-decoration: none;
  line-height: 1;
}
.nav-link:hover,
.nav-link[aria-expanded="true"] {
  color: var(--color-text);
  background: var(--color-surface);
  text-decoration: none;
}
.nav-link .icon-chevron {
  transition: transform var(--trans-fast);
}
.nav-link[aria-expanded="true"] .icon-chevron {
  transform: rotate(180deg);
}

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

/* Search trigger */
.search-trigger {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: border-color var(--trans-fast), color var(--trans-fast),
              box-shadow var(--trans-fast);
  white-space: nowrap;
  line-height: 1;
}
@media (min-width: 1024px) {
  .search-trigger { min-width: 190px; }
}
.search-trigger:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  box-shadow: 0 0 0 3px var(--color-primary-tint);
}
.search-trigger__text  { flex: 1; text-align: left; }
.search-trigger__kbds  {
  display: none;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}
@media (min-width: 1024px) { .search-trigger__kbds { display: flex; } }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  background: var(--color-surface);
  color: var(--color-text-muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--trans-fast), color var(--trans-fast),
              background var(--trans-fast);
}
.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
  background: var(--color-surface-2);
}
.icon-sun  { display: block; }
.icon-moon { display: none;  }
[data-theme="dark"] .icon-sun  { display: none;  }
[data-theme="dark"] .icon-moon { display: block; }

/* Hamburger */
.hamburger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--trans-fast), border-color var(--trans-fast);
}
.hamburger:hover { background: var(--color-surface); }
@media (min-width: 1024px) { .hamburger { display: none; } }

/* ── Mega Menu ── */
.mega-menu-wrap {
  position: relative;
}

.mega-menu {
  position: absolute;
  top: calc(100% + var(--space-3));
  left: 50%;
  translate: -50% 0;
  width: min(88vw, 820px);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-hero);
  box-shadow: var(--shadow-4);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  translate: -50% -8px;
  transition:
    opacity  var(--trans-normal),
    visibility var(--trans-normal),
    translate var(--trans-normal);
  pointer-events: none;
}
.mega-menu[data-open="true"] {
  opacity: 1;
  visibility: visible;
  translate: -50% 0;
  pointer-events: auto;
}
@media (prefers-reduced-motion: reduce) {
  .mega-menu { translate: -50% 0 !important; }
}

.mega-menu__tabs {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}
.mega-menu__tab {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--trans-fast);
}
.mega-menu__tab:hover { color: var(--color-text); background: var(--color-surface); }
.mega-menu__tab[aria-selected="true"] {
  color: var(--color-primary);
  background: var(--color-primary-tint);
}

.mega-menu__panel {
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: var(--space-6) var(--space-4);
  padding: var(--space-6);
}
.mega-menu__panel[data-active="true"] { display: grid; }

.mega-menu__cat-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-1);
}
.mega-menu__cat-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mega-menu__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 5px var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: color var(--trans-fast), background var(--trans-fast);
}
.mega-menu__link:hover {
  color: var(--color-primary);
  background: var(--color-surface);
  text-decoration: none;
}
.mega-menu__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-top: 1px solid var(--color-border);
}

/* ── Mobile Drawer ── */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  visibility: hidden;
  isolation: isolate;
}
.mobile-drawer[data-open="true"] { visibility: visible; }

.mobile-drawer__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.48);
  opacity: 0;
  transition: opacity var(--trans-normal);
}
.mobile-drawer[data-open="true"] .mobile-drawer__backdrop { opacity: 1; }

.mobile-drawer__panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(100vw, 360px);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  translate: 100% 0;
  transition: translate var(--trans-normal);
  box-shadow: var(--shadow-4);
}
.mobile-drawer[data-open="true"] .mobile-drawer__panel { translate: 0 0; }
@media (prefers-reduced-motion: reduce) {
  .mobile-drawer__panel { translate: 0 0 !important; }
}

.mobile-drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--space-4);
  height: var(--header-h-mob);
  flex-shrink: 0;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 1;
}
.mobile-drawer__search {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.mobile-drawer__search input { width: 100%; }

.mobile-drawer__body {
  flex: 1;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-block: var(--space-2) var(--space-8);
}

.drawer-section {}
.drawer-section__btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: color var(--trans-fast);
}
.drawer-section__btn:hover { color: var(--color-text); }
.drawer-section__btn .icon-chevron {
  transition: transform var(--trans-fast);
}
.drawer-section__btn[aria-expanded="true"] .icon-chevron {
  transform: rotate(180deg);
}

.drawer-section__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--trans-normal);
}
.drawer-section__body[data-open="true"] {
  grid-template-rows: 1fr;
}
.drawer-section__inner {
  overflow: hidden;
  padding-bottom: var(--space-2);
}
.drawer-section__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: 0;
  transition: color var(--trans-fast), background var(--trans-fast);
}
.drawer-section__link:hover {
  color: var(--color-primary);
  background: var(--color-surface);
  text-decoration: none;
}

.mobile-drawer__footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4);
  flex-shrink: 0;
  display: flex;
  gap: var(--space-2);
}

/* ── Site Footer ── */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.site-footer__top {
  padding-block: var(--space-16) var(--space-12);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr; }
}
@media (min-width: 1024px) {
  .site-footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr 1fr; }
}

.footer-brand__blurb {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 26ch;
  line-height: var(--line-height-relaxed);
}
.footer-col__title {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}
.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col__link {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
}
.footer-col__link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

@media (max-width: 767px) {
  .footer-col:not(.footer-brand) .footer-col__title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    margin-bottom: 0;
    padding-block: var(--space-3);
    border-bottom: 1px solid var(--color-border);
    user-select: none;
  }
  .footer-col__body {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows var(--trans-normal);
  }
  .footer-col__body[data-open="true"] {
    grid-template-rows: 1fr;
  }
  .footer-col__body-inner {
    overflow: hidden;
    padding-top: var(--space-3);
  }
}
@media (min-width: 768px) {
  .footer-col__body { display: block !important; }
}

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}
.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3) var(--space-8);
}
.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-legal-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
}
.footer-legal-links a:hover { color: var(--color-primary); }

/* ── Tool card grid ── */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 480px)  { .tool-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 768px)  { .tool-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .tool-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 1536px) { .tool-grid { grid-template-columns: repeat(5, 1fr); } }

/* ── Tool Card ── */
.tool-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  transition:
    border-color var(--trans-fast),
    box-shadow var(--trans-fast),
    translate var(--trans-fast);
  position: relative;
  contain: layout style;
}
.tool-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-3);
  translate: 0 -2px;
  text-decoration: none;
  color: inherit;
}
.tool-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .tool-card:hover { translate: 0 0; }
}

.tool-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  flex-shrink: 0;
}
.tool-card__name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  line-height: 1.35;
}
.tool-card__desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.55;
  flex: 1;
}
.tool-card__arrow {
  align-self: flex-end;
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  transition: color var(--trans-fast), translate var(--trans-fast);
}
.tool-card:hover .tool-card__arrow {
  color: var(--color-primary);
  translate: 3px 0;
}

.tool-card__badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
}

/* Skeleton variant */
.tool-card--skeleton {
  pointer-events: none;
  user-select: none;
  animation: none;
}
.tool-card--skeleton .tool-card__icon,
.tool-card--skeleton .tool-card__name,
.tool-card--skeleton .tool-card__desc,
.tool-card--skeleton .tool-card__arrow {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s ease-in-out infinite;
  border-radius: var(--radius-md);
  color: transparent;
}
@keyframes shimmer {
  0%   { background-position:  200% 0; }
  100% { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .tool-card--skeleton .tool-card__icon,
  .tool-card--skeleton .tool-card__name,
  .tool-card--skeleton .tool-card__desc,
  .tool-card--skeleton .tool-card__arrow {
    animation: none;
    background: var(--color-surface-2);
  }
}

/* ── Page header ── */
.page-header {
  padding-block: var(--space-12) var(--space-8);
  text-align: center;
}
.page-header--left { text-align: left; }

.page-header__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.page-header__title {
  margin-bottom: var(--space-4);
}
.page-header__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-inline: auto;
  line-height: var(--line-height-relaxed);
}
.page-header--left .page-header__subtitle { margin-inline: 0; }

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  list-style: none;
}
.breadcrumb li { display: flex; align-items: center; gap: var(--space-1); }
.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--trans-fast);
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb li:last-child a,
.breadcrumb li[aria-current="page"] {
  color: var(--color-text);
  pointer-events: none;
}
.breadcrumb__sep {
  color: var(--color-border-strong);
  user-select: none;
}

/* ── Two-col layout utility ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}
@media (min-width: 1024px) {
  .two-col           { grid-template-columns: 1fr 1fr; }
  .two-col--wide-l   { grid-template-columns: 2fr 1fr; }
  .two-col--wide-r   { grid-template-columns: 1fr 2fr; }
  .two-col--sidebar  { grid-template-columns: 240px 1fr; }
}

/* ── Section divider ── */
.section { padding-block: var(--space-16); }
.section--sm { padding-block: var(--space-8); }
.section--lg { padding-block: var(--space-24); }
.section--tinted { background: var(--color-surface); }
.section--border-t { border-top: 1px solid var(--color-border); }
.section--border-b { border-bottom: 1px solid var(--color-border); }

/* ── Category chip bar ── */
.chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-block: var(--space-4);
}

/* ── Category icon tile ── */
.cat-tile {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--trans-fast);
}
.cat-tile:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-2);
  text-decoration: none;
  color: var(--color-text);
}
.cat-tile__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cat-tile__name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
}
.cat-tile__count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}