/*
 * UCCS — layout.css — v4
 *
 * Sections:
 *   5. Site header — two-row
 *   6. Site footer
 *   7. Responsive — header & footer
*/

/* ============================================================
 *  5. SITE HEADER — two-row
 * ============================================================ */

.site-header {
  width: 100%;
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-divider);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-row {
  width: 100%;
  max-width: var(--site-max-w);
  margin-inline: auto;
  padding-inline: var(--side-pad);
  display: flex;
  align-items: center;
}

.header-row-top {
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
  flex-wrap: nowrap;
}

.header-row-nav {
  padding-block: var(--space-2);
  min-height: 0;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0;
  text-decoration: none;
  color: var(--color-text);
  flex: 1;
  line-height: 1;
  transition: color var(--transition-fast);
}

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

.logo-main {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.9rem + 0.5vw, 1.3rem);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
}

.logo-sub {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  font-weight: 400;
  margin-top: 2px;
  white-space: nowrap;
}

.logo:hover .logo-sub { color: var(--color-primary); }

.nav-utility {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  flex-wrap: nowrap;
}

.header-link {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.header-link:hover { color: var(--color-text); }

.btn-donate {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: background var(--transition-fast),
              transform var(--transition-fast);
}

.btn-donate:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  transform: translateY(-1px);
}

.nav-primary {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-4), 3vw, var(--space-8));
  flex-wrap: wrap;
}

.nav-primary a {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text-muted);
  padding-block: var(--space-2);
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-primary a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition-fast);
}

.nav-primary a:hover        { color: var(--color-text); }
.nav-primary a:hover::after { transform: scaleX(1); }
.nav-primary a.active       { color: var(--color-text); }
.nav-primary a.active::after{ transform: scaleX(1); }

/* ============================================================
 *  6. SITE FOOTER
 *  FIX: explicit --color-surface so footer is visually
 *  distinct from the page body (which uses --color-bg)
 * ============================================================ */

.site-footer {
  margin-top: var(--space-20);
  background-color: var(--color-surface);        /* warm off-white, not body bg */
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  max-width: var(--site-max-w);
  margin-inline: auto;
  padding-inline: var(--side-pad);
  padding-block: var(--space-12) var(--space-10);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-10) var(--space-8);
  align-items: start;
}

.footer-brand { display: flex; flex-direction: column; gap: var(--space-4); }

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.footer-logo:hover { color: var(--color-primary); }

.footer-tagline {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
  max-width: 28ch;
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.social-link svg { width: 18px; height: 18px; }
.social-link:hover { color: var(--color-primary); }

.footer-col { display: flex; flex-direction: column; gap: var(--space-4); }

.footer-heading {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
}

.footer-links a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  background-color: var(--color-surface);        /* match footer body */
  max-width: var(--site-max-w);
  margin-inline: auto;
  padding-inline: var(--side-pad);
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-divider);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
 *  7. RESPONSIVE — header & footer
 * ============================================================ */

@media (max-width: 700px) { .logo-sub { display: none; } }

@media (max-width: 540px) {
  .header-row-top { gap: var(--space-2); padding-block: var(--space-2); }
  .header-link    { font-size: 0.68rem; letter-spacing: 0.04em; }
  .btn-donate     { font-size: 0.68rem; padding: var(--space-1) var(--space-3); }
  .logo-main      { font-size: 1rem; letter-spacing: 0.14em; }
}

@media (max-width: 767px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand {
    grid-column: 1 / -1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-6);
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { flex-direction: column; }
}