/* ==========================================================================
   ASBS Africa — Shared Components
   Header, footer, buttons, cards. Used by every current and future page.
   ========================================================================== */

/* ---- Header ---- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 96px;
  pointer-events: none; /* wrapper stays in place when the header slides away */
}

.site-header {
  position: relative;
  pointer-events: auto;
  background: var(--color-white);
  border-bottom: 1px solid #E5E5E5;
  transition: transform 0.3s ease;
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

@media (prefers-reduced-motion: reduce) {
  .site-header { transition: none; }
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__logo {
  height: 70px;
  width: auto;
  flex-shrink: 0;
  border-radius: 5px;
}

.brand__wordmark {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-navy);
  line-height: 1;
}

.brand__sub {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-gray);
  font-weight: 500;
}

.nav-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid #D8D8D8;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 110;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-navy);
  transition: transform 0.25s ease, opacity 0.25s ease, background 0.25s ease;
}

.nav-toggle__icon { position: relative; }
.nav-toggle__icon::before { position: absolute; top: -6px; }
.nav-toggle__icon::after  { position: absolute; top: 6px; }

.nav-toggle.is-open .nav-toggle__icon { background: transparent; }
.nav-toggle.is-open .nav-toggle__icon::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open .nav-toggle__icon::after  { transform: translateY(-6px) rotate(-45deg); }

.main-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-bottom: 1px solid #E5E5E5;
  z-index: 90;
  flex-direction: column;
  padding: 8px 24px 24px;
  box-shadow: 0 8px 24px rgba(27, 42, 74, 0.08);
}

.main-nav.is-open { display: flex; }

.main-nav__links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.main-nav__links a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-gray);
  padding: 18px 0 18px 16px;
  border-left: 3px solid transparent;
}

.main-nav__links a.is-active {
  color: var(--color-navy);
  border-left-color: var(--color-sage);
}

.main-nav__apply {
  width: 100%;
  margin-top: 20px;
}

/* ---- Nav sub-options ---- */
.nav-item {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
}

.nav-item > a { flex: 1; }

.nav-item__toggle {
  width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray);
}

.nav-item__toggle svg { transition: transform 0.25s ease; }
.nav-item.is-open .nav-item__toggle svg { transform: rotate(180deg); }
.nav-item.is-open .nav-item__toggle { color: var(--color-navy); }

.nav-item__toggle--label {
  width: auto;
  gap: 6px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding: 18px 0 18px 16px;
}

@media (min-width: 900px) {
  .nav-item__toggle--label {
    padding: 0;
    font-size: 0.95rem;
  }
}

/* Mobile: animated expand/retract */
.nav-sub {
  flex-basis: 100%;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.25s ease;
}

.nav-item.is-open .nav-sub { grid-template-rows: 1fr; }

.nav-sub ul {
  overflow: hidden;
  min-height: 0;
}

.main-nav__links .nav-sub a {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-gray);
  padding: 12px 0 12px 32px;
  border-left: 3px solid #E5E5E5;
  margin-left: 0;
}

.main-nav__links .nav-sub a:hover { color: var(--color-navy); }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .main-nav {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    background: none;
    box-shadow: none;
    padding: 0;
    gap: 32px;
  }
  .main-nav__links { flex-direction: row; gap: 32px; }
  .main-nav__links a { padding: 0; border: none; font-size: 0.95rem; }
  .main-nav__apply { width: auto; margin-top: 0; }

  .nav-item { position: relative; align-items: center; flex-wrap: nowrap; }
  .nav-item > a { flex: none; }
  .nav-item__toggle { width: 28px; height: 28px; }

  .nav-sub {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 240px;
    padding-top: 14px; /* bridges the hover gap */
    z-index: 95;
  }

  .nav-item:hover .nav-sub,
  .nav-item:focus-within .nav-sub,
  .nav-item.is-open .nav-sub { display: block; }

  .nav-sub ul {
    background: var(--color-white);
    border: 1px solid #E5E5E5;
    border-radius: var(--radius-card);
    box-shadow: 0 8px 24px rgba(27, 42, 74, 0.12);
    padding: 8px 0;
  }

  .main-nav__links .nav-sub a {
    padding: 10px 20px;
    border-left: none;
  }

  .main-nav__links .nav-sub a:hover { background: var(--color-offwhite); }
}

/* Keep anchored sections clear of the sticky header */
section[id],
.programme-tab[id] { scroll-margin-top: 110px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  font-size: 0.9rem;
  padding: 16px 28px;
  border-radius: var(--radius-button);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  width: 100%;
}

@media (min-width: 600px) {
  .btn { width: auto; }
}

.btn-primary {
  background: var(--color-sage);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-sage-dark);
}

.btn-secondary {
  background: transparent;
  border: 1px solid currentColor;
  color: var(--color-white);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.btn-dark {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn-dark:hover {
  background: var(--color-navy-dark);
}

/* ---- Impact stats ---- */
.stats-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  border-top: 1px solid rgba(255, 255, 255, 0.35);
  padding-top: 20px;
}

.stat__number {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  margin-bottom: 10px;
}

.stat p {
  color: rgba(255, 255, 255, 0.9);
}

/* ---- Cards ---- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: 0 2px 12px rgba(27, 42, 74, 0.08);
  overflow: hidden;
}

.card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  background: var(--color-offwhite);
}

.card__body {
  padding: 20px;
}

.card__tag {
  display: block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-sage-dark);
  margin-bottom: 8px;
}

.card__title {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-navy);
  margin-top: 12px;
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-navy);
  color: #C7CCD6;
  padding: var(--section-padding-mobile) 0 24px;
}

@media (min-width: 768px) {
  .site-footer { padding-top: var(--section-padding-desktop); }
}

.site-footer h4 {
  color: var(--color-white);
  font-size: 1rem;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.footer-grid {
  display: grid;
  gap: 40px;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  }
}

.footer-brand p {
  color: #A9AFBC;
  margin-top: 16px;
  max-width: 32ch;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 18px;
  color: #C7CCD6;
}

.footer-contact svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-sage);
}

.footer-contact a:hover {
  color: var(--color-white);
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0 24px;
}

.newsletter-form input {
  padding: 12px 16px;
  border-radius: var(--radius-button);
  border: 1px solid #3A4A6B;
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-white);
  font-family: var(--font-body);
}

.newsletter-form input::placeholder {
  color: #8891A3;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border: 1px solid #3A4A6B;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.social-links a:hover {
  border-color: var(--color-sage);
  color: var(--color-sage);
}

.footer-bottom {
  border-top: 1px solid #2C3B5C;
  margin-top: 48px;
  padding-top: 24px;
  font-size: 0.85rem;
  color: #8891A3;
}