/* Mahd landing — header, announcement, nav (2026) */

.mahd-header-shell {
  position: sticky;
  top: 0;
  z-index: 150;
  transition: box-shadow 0.25s, background 0.25s;
}

.mahd-header-shell.is-scrolled {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.mahd-header-shell.is-scrolled .mahd-nav--sticky {
  background: rgba(6, 11, 20, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--mahd-border);
}

.mahd-nav--sticky {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem);
  max-width: 1280px;
  margin: 0 auto;
  transition: background 0.25s;
}

.mahd-nav__actions {
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.mahd-nav__links a.is-active {
  color: var(--mahd-accent);
}

.mahd-nav__links a.is-active::after {
  content: '';
  display: block;
  height: 2px;
  margin-top: 4px;
  background: var(--mahd-gradient);
  border-radius: 2px;
}

.mahd-theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--mahd-border);
  background: var(--mahd-surface);
  color: var(--mahd-text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
}

.mahd-theme-toggle:hover {
  background: var(--mahd-surface-strong);
  transform: scale(1.05);
}

/* Announcement */
.mahd-announcement {
  background: linear-gradient(90deg, rgba(45, 212, 191, 0.2), rgba(56, 189, 248, 0.15));
  border-bottom: 1px solid var(--mahd-border);
}

.mahd-announcement.is-hidden {
  display: none;
}

.mahd-announcement__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.5rem clamp(1rem, 4vw, 3rem);
  font-size: 0.9rem;
  color: var(--mahd-text);
}

.mahd-announcement__inner p {
  margin: 0;
}

.mahd-announcement__inner i {
  color: var(--mahd-accent);
}

.mahd-announcement__close {
  margin-inline-start: auto;
  background: transparent;
  border: none;
  color: var(--mahd-muted);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 8px;
}

.mahd-announcement__close:hover {
  color: var(--mahd-text);
  background: var(--mahd-surface);
}

/* Mobile drawer */
body.mahd-nav-open {
  overflow: hidden;
}

.mahd-header-shell .mahd-nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem clamp(1rem, 4vw, 3rem) 1.25rem;
  background: var(--mahd-bg-elevated);
  border-bottom: 1px solid var(--mahd-border);
  max-height: min(70vh, 420px);
  overflow-y: auto;
}

.mahd-header-shell .mahd-nav.is-open + .mahd-nav__mobile {
  display: flex;
}

@media (min-width: 900px) {
  .mahd-nav__actions {
    display: flex;
  }
  .mahd-nav__cta {
    display: inline-flex !important;
  }
}

/* Light theme */
.mahd-landing[data-theme="light"] {
  --mahd-bg: #f0f4f8;
  --mahd-bg-elevated: #ffffff;
  --mahd-surface: rgba(0, 0, 0, 0.04);
  --mahd-surface-strong: rgba(0, 0, 0, 0.07);
  --mahd-border: rgba(0, 0, 0, 0.1);
  --mahd-text: #0f172a;
  --mahd-muted: #64748b;
}

.mahd-landing[data-theme="light"] .mahd-header-shell.is-scrolled .mahd-nav--sticky {
  background: rgba(255, 255, 255, 0.92);
}