/* ============================================
   RyterAi — Layout: Header, Footer, Page
   ============================================ */

/* ── Header ── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: var(--z-header);
  transition: all 0.4s ease;
  padding: 0 var(--space-6);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 10px rgba(0, 0, 0, 0.04);
}

.header__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.header__logo {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  display: flex;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  letter-spacing: var(--letter-spacing-tight);
  z-index: 10;
}

.header__logo-icon {
  font-size: 1.4em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Dark header (on hero) */
[data-header-theme="dark"] .header:not(.scrolled) .header__logo {
  color: var(--color-white);
}

[data-header-theme="dark"] .header:not(.scrolled) .header__nav-link {
  color: rgba(255, 255, 255, 0.8);
}

[data-header-theme="dark"] .header:not(.scrolled) .header__nav-link:hover,
[data-header-theme="dark"] .header:not(.scrolled) .header__nav-link.active {
  color: var(--color-white);
}

[data-header-theme="dark"] .header:not(.scrolled) .btn--ghost {
  color: rgba(255, 255, 255, 0.8);
}

[data-header-theme="dark"] .header:not(.scrolled) .btn--ghost:hover {
  color: var(--color-white);
}

/* Light header (scrolled or no dark theme) */
.header.scrolled .header__logo {
  color: var(--color-dark);
}

.header.scrolled .header__nav-link {
  color: var(--color-text-light);
}

.header.scrolled .header__nav-link:hover,
.header.scrolled .header__nav-link.active {
  color: var(--color-primary);
}

.header.scrolled .btn--ghost {
  color: var(--color-text-light);
}

.header.scrolled .btn--ghost:hover {
  color: var(--color-primary);
}

/* Navigation */
.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.header__nav-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
  transition: color var(--transition-fast);
  position: relative;
  padding: 4px 0;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition-base);
  transform-origin: left;
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
  transform: scaleX(1);
}

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

.header__nav-link.active {
  color: var(--color-primary);
}

/* Header CTA buttons */
.header__cta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Mobile toggle */
.header__mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  gap: 5px;
  justify-content: center;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 10;
  padding: 8px;
}

.header__mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  transition: all var(--transition-base);
}

[data-header-theme="dark"] .header:not(.scrolled) .header__mobile-toggle span {
  background: var(--color-white);
}

.header.scrolled .header__mobile-toggle span,
.header__mobile-toggle span {
  background: var(--color-dark);
}

.header__mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.header__mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.header__mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ── Mobile Menu ── */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: var(--z-mobile-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-8);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  gap: var(--space-2);
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu a {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  padding: var(--space-3) var(--space-4);
  color: var(--color-dark);
  transition: color var(--transition-fast);
  text-align: center;
}

.mobile-menu a:hover {
  color: var(--color-primary);
}

.mobile-menu .btn {
  width: 100%;
  max-width: 300px;
  margin-top: var(--space-4);
  justify-content: center;
}

/* ── Responsive Header ── */
@media (max-width: 1024px) {
  .header__nav {
    display: none;
  }

  .header__cta {
    display: none;
  }

  .header__mobile-toggle {
    display: flex;
  }
}

@media (min-width: 1025px) {
  .mobile-menu {
    display: none !important;
  }
}

/* ── Footer ── */
.footer {
  background: var(--color-bg-dark);
  color: var(--color-white);
  padding: var(--space-20) 0 var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-16);
}

.footer__brand-name {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-extrabold);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--space-4);
}

.footer__brand-description {
  color: rgba(255, 255, 255, 0.55);
  margin-top: var(--space-3);
  font-size: var(--font-size-sm);
  max-width: 300px;
  line-height: var(--line-height-relaxed);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-base);
  font-size: var(--font-size-sm);
}

.footer__social-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.footer__social-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.footer__column-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  margin-bottom: var(--space-5);
  color: rgba(255, 255, 255, 0.9);
}

.footer__links {
  list-style: none;
}

.footer__link {
  display: block;
  padding: var(--space-2) 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.footer__link:hover {
  color: var(--color-white);
  padding-left: 4px;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.35);
}

/* Footer responsive */
@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
}

@media (max-width: 640px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

/* ── Page top padding ── */
.page-content {
  padding-top: var(--header-height);
}