/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: transparent;
  backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background 200ms ease, backdrop-filter 200ms ease, border-color 200ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom-color: var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
  position: relative;
}

.logo-mark {
  height: 28px;
  width: auto;
  filter: brightness(0) invert(1);
  transition: filter 200ms ease;
}

.site-header.is-scrolled .logo-mark {
  filter: none;
}

.main-nav {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.main-nav ul {
  display: flex;
  gap: 50px;
}

.main-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-dark);
  padding: 4px 0;
  transition: color 200ms ease;
}

/* The transparent-header effect only applies at desktop widths, where nav
   links sit directly in the header row over the hero. Below 861px the
   links move into an always-white dropdown panel (see the mobile nav
   rules further down), so they must stay dark regardless of scroll. */
@media (min-width: 861px) {
  .site-header:not(.is-scrolled) .main-nav a:not(.active):not(:hover) {
    color: #fff;
  }
}

.main-nav a.active,
.main-nav a:hover {
  color: var(--color-primary);
}

.header-cta {
  margin-left: auto;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-black);
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 860px) {
  .header-inner .header-cta { display: none; }

  .nav-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    transform: none;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  .main-nav.is-open {
    max-height: 320px;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 24px;
  }

  .main-nav li {
    border-bottom: 1px solid var(--color-border);
  }

  .main-nav a {
    display: block;
    padding: 14px 0;
  }

  .nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.is-active span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn-outline {
  background: transparent;
  border-color: var(--color-dark);
  color: var(--color-dark);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-on-dark {
  border-color: #fff;
  color: #fff;
}

.btn-on-dark:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

/* Cards */
.card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.grid {
  display: grid;
  gap: 28px;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  background: var(--color-black);
  color: var(--color-text-on-dark);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 40px;
}

.footer-brand p {
  color: #A8A8A8;
  max-width: 280px;
  margin-top: 16px;
}

.footer-col h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #A8A8A8;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.85rem;
  color: #8A8A8A;
}

@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .footer-brand p {
    margin-left: auto;
    margin-right: auto;
  }

  .footer-bottom {
    text-align: center;
  }
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  background: #fff;
  transition: border-color var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
}

select.form-control {
  padding-right: 31px;
}

.form-error {
  color: var(--color-primary);
  font-size: 0.85rem;
  margin-top: 4px;
  display: none;
}

.form-group.has-error .form-control {
  border-color: var(--color-primary);
}

.form-group.has-error .form-error {
  display: block;
}

.form-status {
  margin-top: 16px;
  font-weight: 600;
}

.form-status.success { color: #1A8A4A; }
.form-status.error { color: var(--color-primary); }