/* ============================================================
   home.css — Homepage UI (Step 2).
   Composes the Step 1 design system (tokens/components). Adds no
   new design tokens. Linked only from index.html.
   ============================================================ */

/* ---------- Header ---------- */
.header-left { display: flex; align-items: center; gap: var(--space-4); }

.header-search {
  flex: 1 1 auto;
  max-width: 440px;
  margin-inline: var(--space-4);
  display: none;
}
@media (min-width: 900px) { .header-search { display: block; } }

.header-actions { display: flex; align-items: center; gap: var(--space-2); }

.theme-toggle,
.menu-toggle {
  display: inline-grid;
  place-items: center;
  width: 42px; height: 42px;
  border-radius: var(--radius-md);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.theme-toggle:hover,
.menu-toggle:hover { background: var(--color-accent-soft); border-color: var(--color-accent); color: var(--color-primary); }
.menu-toggle { display: none; }
@media (max-width: 899px) { .menu-toggle { display: inline-grid; } }

/* Icon swap for theme toggle */
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- Mobile menu panel ---------- */
.mobile-menu {
  position: fixed;
  inset: var(--header-height) 0 auto 0;
  z-index: var(--z-dropdown);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}
.mobile-menu.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
.mobile-menu__links { display: flex; flex-direction: column; gap: var(--space-2); }
.mobile-menu__links a {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-weight: var(--fw-medium);
}
.mobile-menu__links a:hover { background: var(--color-accent-soft); color: var(--color-primary); }
@media (min-width: 900px) { .mobile-menu { display: none; } }

/* ---------- Hero ---------- */
.hero { padding-block: var(--space-8) var(--space-6); text-align: center; }
@media (min-width: 768px) { .hero { padding-block: var(--space-10) var(--space-8); } }
.hero__title {
  font-size: var(--fs-2xl);
  letter-spacing: var(--tracking-tight);
}
@media (min-width: 768px) { .hero__title { font-size: var(--fs-3xl); } }
.hero__title span { color: var(--color-primary); }
.hero__subtitle {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--fs-md);
}
.hero__search { max-width: 620px; margin: var(--space-6) auto 0; }
.hero__popular {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
}

/* ---------- Section scaffolding ---------- */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.section-head__title { font-size: var(--fs-xl); }
.section-head__desc { color: var(--color-muted); font-size: var(--fs-sm); margin-top: var(--space-1); }

/* ---------- Featured card ---------- */
.featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  align-items: center;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  color: inherit;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.featured:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
@media (min-width: 768px) { .featured { grid-template-columns: 120px 1fr auto; padding: var(--space-7); } }
.featured__icon {
  display: grid;
  place-items: center;
  width: 96px; height: 96px;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.featured__icon svg { width: 48px; height: 48px; }
.featured__body { display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-2); }
.featured__title { font-size: var(--fs-xl); }
.featured__desc { color: var(--color-muted); }
.featured__cta { display: flex; }
@media (max-width: 767px) { .featured__cta .btn { width: 100%; } }

/* ---------- Category cards ---------- */
.categories { display: grid; gap: var(--space-5); grid-template-columns: 1fr; }
@media (min-width: 640px) { .categories { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .categories { grid-template-columns: repeat(3, 1fr); } }

.category-card { display: flex; flex-direction: column; gap: var(--space-4); }
.category-card__head { display: flex; align-items: center; gap: var(--space-3); }
.category-card__icon {
  display: grid; place-items: center;
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-primary);
  flex: none;
}
.category-card__icon svg { width: 22px; height: 22px; }
.category-card__title { font-size: var(--fs-md); }
.category-card__count { font-size: var(--fs-xs); color: var(--color-muted); }
.category-card__list { display: flex; flex-direction: column; }
.category-card__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  margin-inline: calc(var(--space-3) * -1);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--fs-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}
.category-card__list a:hover { background: var(--color-accent-soft); color: var(--color-primary); }
.category-card__list a svg { width: 16px; height: 16px; color: var(--color-muted); }
.category-card__list a:hover svg { color: var(--color-primary); }

/* ---------- Popular / calculator cards ---------- */
.calc-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 640px) { .calc-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1024px) { .calc-grid { grid-template-columns: repeat(4, 1fr); } }

.calc-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-xs);
  color: inherit;
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-fast);
}
.calc-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-light); }
.calc-card__icon {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-primary);
}
.calc-card__icon svg { width: 20px; height: 20px; }
.calc-card__name { font-size: var(--fs-sm); font-weight: var(--fw-semibold); color: var(--color-primary-dark); }
.calc-card__desc { font-size: var(--fs-xs); color: var(--color-muted); }
[data-theme="dark"] .calc-card__name { color: var(--color-text); }

/* ---------- Recently used (empty state) ---------- */
.recent-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-2);
  padding: var(--space-8);
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  color: var(--color-muted);
}
.recent-empty__icon {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-alt);
  color: var(--color-muted);
}

/* ---------- Search results (UI only) ---------- */
.search__results-inner { padding: var(--space-2); }
.search__hint {
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-sm);
  color: var(--color-muted);
}

/* ---------- Footer ---------- */
.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}
.site-footer .logo { font-size: var(--fs-sm); }

/* ---------- Legal information overlay ---------- */
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-3);
}
.footer-legal__link {
  padding: 0;
  background: none;
  border: 0;
  color: var(--color-muted);
  font: inherit;
  font-size: var(--fs-xs);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}
.footer-legal__link:hover,
.footer-legal__link:focus-visible { color: var(--color-primary); }

.legal-dialog {
  width: min(680px, calc(100vw - (var(--space-4) * 2)));
  max-width: none;
  max-height: min(78vh, 760px);
  margin: auto;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text);
  overflow: visible;
}
.legal-dialog::backdrop { background: color-mix(in srgb, var(--color-primary-dark) 48%, transparent); }
.legal-dialog__panel {
  display: flex;
  flex-direction: column;
  max-height: min(78vh, 760px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.legal-dialog[open] .legal-dialog__panel { animation: legal-dialog-in var(--transition-base); }
.legal-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5);
  border-bottom: 1px solid var(--color-border);
}
.legal-dialog__header h2 { font-size: var(--fs-lg); }
.legal-dialog__body {
  overflow-y: auto;
  padding: var(--space-5);
  color: var(--color-text);
}
.legal-dialog__body section + section { margin-top: var(--space-5); }
.legal-dialog__body h3 { font-size: var(--fs-md); margin-bottom: var(--space-2); }
.legal-dialog__body p,
.legal-dialog__body li { color: var(--color-muted); font-size: var(--fs-sm); }
.legal-dialog__body p + p { margin-top: var(--space-3); }
.legal-dialog__body ul { list-style: disc; padding-left: var(--space-5); }
.legal-dialog__body a { color: var(--color-primary); }
.legal-dialog__updated { color: var(--color-muted); font-size: var(--fs-xs); }
@keyframes legal-dialog-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 639px) {
  .legal-dialog {
    width: 100vw;
    max-height: 86svh;
    margin: auto 0 0;
  }
  .legal-dialog__panel {
    max-height: 86svh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    border-bottom: 0;
  }
  .legal-dialog[open] .legal-dialog__panel { animation-name: legal-sheet-in; }
  .legal-dialog__header,
  .legal-dialog__body { padding: var(--space-4); }
}
@keyframes legal-sheet-in {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}