/*
 * Header and mobile tab bar, on the schoolcompare brand.
 *
 * The header is a white card band closed by a single hairline rule — no
 * shadow. The guideline's chrome is quiet; the colour on this surface is the
 * wordmark and the one active nav item, and nothing else.
 */

.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  /* Add the safe-area inset to horizontal padding so the header content
     clears the notch in landscape on iPhones. */
  padding-inline: max(1.5rem, env(safe-area-inset-left)) max(1.5rem, env(safe-area-inset-right));
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  /* 64px desktop / 56px mobile is load-bearing: the school detail page's
     sticky section nav docks against it with a hardcoded `top` in
     SchoolDetailShell.module.css and schoolSections.module.css, and the
     scroll-spy observers use it as a rootMargin. Change it in all four
     places or not at all. */
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  /* Padded hit area so the logo link is ≥44×44 on touch */
  margin: -0.375rem -0.5rem;
  padding: 0.375rem 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: color var(--transition);
  -webkit-tap-highlight-color: transparent;
}

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

/*
 * The mark colours itself — pin in var(--brand), leaf knocked out in
 * var(--bg-card), which is this header's own ground. It takes no colour from
 * currentColor, so there is deliberately no `color` here.
 */
.logoIcon {
  display: inline-flex;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
}

.logoIcon svg {
  width: 100%;
  height: 100%;
}

/*
 * "schoolcompare", one word, lower case. Manrope 700 pulled tight — the
 * negative tracking is what makes the two halves read as a single word rather
 * than as two.
 */
.logoText {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.035em;
}

.logoTextAccent {
  color: var(--brand);
}

.logo:hover .logoTextAccent {
  color: var(--brand-stronger);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}

.navLink {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.4375rem;
  padding: 0.5rem 0.875rem;
  font-family: var(--font-ui);
  font-size: var(--step--1);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition), background-color var(--transition);
}

.navLink:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

/* The current page is marked twice — brand hue and a heavier weight — so the
   state never rests on colour alone. */
.navLink.active {
  color: var(--brand);
  background: var(--brand-bg);
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.125rem;
  height: 1.125rem;
  padding: 0 0.375rem;
  font-family: var(--font-ui);
  font-size: var(--step--2);
  font-weight: 700;
  line-height: 1;
  color: var(--brand-on);
  background: var(--brand);
  border-radius: 9999px;
  animation: badgePop 0.3s ease-out;
}

@keyframes badgePop {
  0% {
    transform: scale(0.6);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ─── Bottom tab bar (mobile only) ──────────────────────────────── */

.bottomBar {
  display: none;
}

.tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  flex: 1;
  min-height: 56px;
  padding: 0.375rem 0.25rem;
  font-family: var(--font-ui);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color var(--transition);
  -webkit-tap-highlight-color: transparent;
}

.tabActive {
  color: var(--brand);
  font-weight: 600;
}

.tabIconWrap {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

/* The active tab's icon sits in a brand-tinted stadium — the same rounded
   geometry as the rest of the system, and a second cue beyond hue. Drawn as a
   pseudo-element so it can bleed wider than the 24px icon box without moving
   the badge's anchor. */
.tabIconWrap::before {
  content: '';
  position: absolute;
  inset: -2px -9px;
  border-radius: var(--radius-xl);
  background: transparent;
  transition: background-color var(--transition);
}

.tabActive .tabIconWrap::before {
  background: var(--brand-bg);
}

.tab:active .tabIconWrap::before {
  background: var(--brand-bg);
}

.tabIcon {
  position: relative;
  width: 22px;
  height: 22px;
}

.tabLabel {
  line-height: 1;
}

.tabBadge {
  position: absolute;
  top: -7px;
  right: -7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-family: var(--font-ui);
  font-size: 0.6875rem;
  font-weight: 700;
  line-height: 1;
  color: var(--brand-on);
  background: var(--brand);
  border: 2px solid var(--bg-card);
  border-radius: 9999px;
  animation: badgePop 0.3s ease-out;
}

@media (max-width: 640px) {
  .container {
    padding: 0 1rem;
    height: 56px;
  }

  /* Hide the top text nav; the bottom bar takes over */
  .nav {
    display: none;
  }

  .logoIcon {
    width: 34px;
    height: 34px;
  }

  .logoText {
    font-size: var(--step-1);
  }

  .bottomBar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 12px rgba(var(--shadow-rgb), 0.06);
    /* Respect iPhone home-indicator (bottom) and notch (left/right in
       landscape) insets so the tab content never sits under system UI. */
    padding-bottom: env(safe-area-inset-bottom, 0);
    padding-inline: env(safe-area-inset-left, 0) env(safe-area-inset-right, 0);
    /* Compensate for iOS Chrome's auto-hiding URL bar — Navigation.tsx
       writes the offset based on the Visual Viewport API. translate3d
       (instead of translateY) forces hardware compositing so the bar
       doesn't lag/flicker during the toolbar animation. */
    transform: translate3d(0, var(--mobile-bar-offset, 0px), 0);
  }
}