/* components.css – Reusable components */

/* ============================================
   NAVIGATION
   ============================================ */

#main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  height: var(--nav-height);
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

#main-nav.nav--scrolled {
  background-color: rgba(255, 253, 248, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-nav);
}

.nav__container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

@media (min-width: 1024px) {
  .nav__container { padding-inline: var(--space-8); }
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: #FFFFFF;
  letter-spacing: 0;
  transition: color var(--transition-fast);
}

.nav--scrolled .nav__logo-text {
  color: var(--color-text);
}

.nav__logo-accent {
  color: #67E8F9;
}

.nav--scrolled .nav__logo-accent {
  color: var(--color-primary);
}

/* Desktop Links */
.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .nav__links { display: flex; }
}

@media (min-width: 1024px) and (max-width: 1160px) {
  .nav__container {
    padding-inline: var(--space-4);
    gap: var(--space-2);
  }

  .nav__logo-text {
    font-size: var(--text-lg);
  }

  .nav__links {
    gap: 0;
  }

  .nav__link {
    padding-inline: var(--space-2);
    font-size: var(--text-xs);
  }
}

.nav__link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  min-height: 44px;
  white-space: nowrap;
}

.nav__link:hover {
  color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.1);
}

.nav--scrolled .nav__link {
  color: var(--color-text-muted);
}

.nav--scrolled .nav__link:hover {
  color: var(--color-text);
  background-color: var(--color-surface-2);
}

.nav__link--active {
  color: #FFFFFF !important;
  font-weight: var(--weight-semibold);
}

.nav--scrolled .nav__link--active {
  color: var(--color-primary) !important;
  background-color: var(--color-primary-light);
}

/* CTA Link */
.nav__link--cta {
  background-color: var(--color-accent);
  color: #FFFFFF !important;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
}

.nav__link--cta:hover {
  background-color: var(--color-accent-hover) !important;
  color: #FFFFFF !important;
}

/* Mobile Toggle */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

@media (min-width: 1024px) {
  .nav__toggle { display: none; }
}

.nav__toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.nav--scrolled .nav__toggle:hover {
  background-color: var(--color-surface-2);
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  transform-origin: center;
}

.nav--scrolled .nav__toggle-bar {
  background-color: var(--color-text);
}

.nav__toggle--open .nav__toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle--open .nav__toggle-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.nav__toggle--open .nav__toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Drawer */
.nav__mobile {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4) var(--space-4) var(--space-6);
  transform: translateY(-110%);
  opacity: 0;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  border-top: 1px solid var(--color-border);
}

.nav__mobile--open {
  transform: translateY(0);
  opacity: 1;
}

.nav__mobile ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav__mobile .nav__link {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
  width: 100%;
  border-radius: var(--radius-lg);
}

.nav__mobile .nav__link:hover {
  color: var(--color-text);
  background-color: var(--color-surface-2);
}

.nav__mobile .nav__link--active {
  color: var(--color-primary) !important;
  background-color: var(--color-primary-light);
}

.nav__mobile .nav__link--cta {
  background-color: var(--color-accent);
  color: #FFFFFF !important;
  margin-top: var(--space-2);
  justify-content: center;
}

/* Focus styles for nav */
.nav__link:focus-visible,
.nav__toggle:focus-visible,
.nav__logo:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ============================================
   ARTICLE SEO HELPERS
   ============================================ */

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.breadcrumbs__link {
  color: inherit;
  text-decoration: none;
}

.breadcrumbs__link:hover,
.breadcrumbs__link:focus-visible {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumbs__current {
  color: var(--color-text);
  font-weight: var(--weight-medium);
}

.breadcrumbs__separator {
  color: var(--color-text-muted);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  font-size: var(--text-base);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color var(--transition-normal), border-color var(--transition-normal),
              color var(--transition-normal), transform var(--transition-fast),
              box-shadow var(--transition-normal);
  touch-action: manipulation;
  min-height: 44px;
  white-space: nowrap;
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

.btn--accent {
  background-color: var(--color-accent);
  color: var(--color-on-accent);
  border-color: var(--color-accent);
}
.btn--accent:hover {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: var(--color-on-accent);
}

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

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

.btn--outline-light {
  background-color: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.6);
}
.btn--outline-light:hover {
  background-color: rgba(255, 255, 255, 0.12);
  border-color: #FFFFFF;
  color: #FFFFFF;
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}
.btn--ghost:hover {
  background-color: var(--color-surface-2);
  color: var(--color-text);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  min-height: 52px;
}

.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  min-height: 36px;
}

/* ============================================
   TOPIC CARDS
   ============================================ */

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
}

.topic-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--card-accent, var(--color-primary));
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: color-mix(in srgb, var(--card-accent, var(--color-primary)) 34%, var(--color-border));
}

.topic-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--icon-bg, var(--color-primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.topic-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.topic-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  flex: 1;
}

.topic-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--card-accent, var(--color-primary));
  text-decoration: none;
  margin-top: auto;
  transition: gap var(--transition-fast);
}

.topic-card__link:hover {
  gap: var(--space-3);
  color: var(--card-accent, var(--color-primary));
  text-decoration: none;
}

.topic-card__link:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Scroll-reveal animations */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.45s ease-out, transform 0.45s ease-out;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

.topic-card:nth-child(2).reveal-on-scroll { transition-delay: 0.08s; }
.topic-card:nth-child(3).reveal-on-scroll { transition-delay: 0.16s; }
.topic-card:nth-child(4).reveal-on-scroll { transition-delay: 0.24s; }
.topic-card:nth-child(5).reveal-on-scroll { transition-delay: 0.08s; }
.topic-card:nth-child(6).reveal-on-scroll { transition-delay: 0.16s; }
.topic-card:nth-child(7).reveal-on-scroll { transition-delay: 0.24s; }
.topic-card:nth-child(8).reveal-on-scroll { transition-delay: 0.32s; }

/* FAQ items stagger */
.faq__item:nth-child(1).reveal-on-scroll { transition-delay: 0s; }
.faq__item:nth-child(2).reveal-on-scroll { transition-delay: 0.06s; }
.faq__item:nth-child(3).reveal-on-scroll { transition-delay: 0.12s; }
.faq__item:nth-child(4).reveal-on-scroll { transition-delay: 0.18s; }
.faq__item:nth-child(5).reveal-on-scroll { transition-delay: 0.24s; }
.faq__item:nth-child(6).reveal-on-scroll { transition-delay: 0.30s; }

/* ============================================
   FORM ELEMENTS
   ============================================ */

.newsletter__form {
  width: 100%;
}

.newsletter__input-group {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

@media (min-width: 480px) {
  .newsletter__input-group { flex-wrap: nowrap; }
}

.newsletter__input {
  flex: 1;
  min-width: 200px;
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 44px;
}

.newsletter__input::placeholder {
  color: var(--color-text-subtle);
}

.newsletter__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.newsletter__input[aria-invalid="true"] {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.newsletter__hint {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
  margin-top: var(--space-3);
  line-height: var(--leading-normal);
}

.newsletter__hint[data-state] {
  display: block;
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  text-align: center;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.14);
}

.newsletter__hint[data-state="success"] {
  background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
  border-color: #34d399;
  color: #166534;
}

.newsletter__hint[data-state="duplicate"] {
  background: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 100%);
  border-color: #fb7185;
  color: #9f1239;
}

.newsletter__hint[data-state="error"] {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color: #fb923c;
  color: #9a3412;
}

.newsletter__success {
  padding: var(--space-4);
  background-color: #DCFCE7;
  border: 1px solid #86EFAC;
  border-radius: var(--radius-lg);
  color: #15803D;
  font-family: var(--font-heading);
  font-weight: var(--weight-semibold);
  text-align: center;
}

.field-error {
  font-size: var(--text-sm);
  color: var(--color-error);
  margin-top: var(--space-2);
  font-weight: var(--weight-medium);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: #18212F;
  color: #CBD5E1;
  padding-block: var(--space-12) var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
  }
}

.footer .nav__logo-text {
  color: #FFFFFF;
  font-size: var(--text-xl);
}

.footer .nav__logo-accent {
  color: #67E8F9;
}

.footer__tagline {
  font-size: var(--text-sm);
  color: #94A3B8;
  margin-top: var(--space-2);
  line-height: var(--leading-normal);
}

.footer__nav-title {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: #64748B;
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__links a {
  font-size: var(--text-sm);
  color: #94A3B8;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: #FFFFFF;
}

.footer__links a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 2px;
}

.footer__bottom {
  border-top: 1px solid #1E293B;
  padding-top: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__copy {
  font-size: var(--text-xs);
  color: #64748B;
  line-height: var(--leading-normal);
}

.footer__copy a {
  color: #94A3B8;
  text-decoration: underline;
}

.footer__copy a:hover {
  color: #FFFFFF;
}