/* Reusable Component Styles */

/* ====== Header & Navigation ====== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: var(--z-index-header);
  transition: box-shadow var(--transition-normal);
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  transition: opacity var(--transition-fast);
}

.nav-brand:hover {
  opacity: 0.8;
}

.nav-logo {
  height: 48px;
  width: auto;
}

.nav-brand-text {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  font-family: var(--font-serif);
  color: var(--color-text-primary);
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text-primary);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}


/* ====== Buttons ====== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-app-store {
  display: inline-block;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.btn-app-store:hover {
  transform: scale(1.05);
}

.btn-app-store img {
  height: 50px;
  width: auto;
}


/* ====== Cards ====== */

.card {
  background: var(--color-background-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.card__icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--spacing-md);
}

.card__title {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.card__description {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}


/* ====== Horizontal Feature Items ====== */

.features-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
  margin-top: var(--spacing-2xl);
}

.feature-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  align-items: center;
}

.feature-item__image {
  flex: 0 0 auto;
  width: 100%;
  max-width: 400px;
}

.feature-item__image img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.feature-item__content {
  flex: 1;
  text-align: center;
}

.feature-item__title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
}

.feature-item__description {
  font-size: var(--font-size-h4);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 600px;
  margin: 0 auto;
}

/* Tablet and above: side-by-side layout */
@media (min-width: 768px) {
  .feature-item {
    flex-direction: row;
    gap: var(--spacing-2xl);
    text-align: left;
  }

  .feature-item__image {
    max-width: 300px;
  }

  .feature-item__content {
    text-align: left;
  }

  .feature-item__description {
    margin: 0;
  }

  /* Reverse layout for alternating design */
  .feature-item--reverse {
    flex-direction: row-reverse;
  }
}

/* Desktop: larger images */
@media (min-width: 1024px) {
  .feature-item__image {
    max-width: 400px;
  }
}


/* ====== Category Cards ====== */

.category-card {
  text-align: center;
  background: var(--color-background-card);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.category-card__icon {
  width: 100%;
  max-width: 120px;
  height: auto;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--border-radius-md);
}

.category-card__title {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-xs);
  line-height: var(--line-height-tight);
}

.category-card__description {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}


/* ====== Screenshots Carousel ====== */

.screenshots__carousel {
  display: flex;
  gap: var(--spacing-lg);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: var(--spacing-md) 0;
  -webkit-overflow-scrolling: touch;
}

.screenshots__carousel::-webkit-scrollbar {
  height: 8px;
}

.screenshots__carousel::-webkit-scrollbar-track {
  background: var(--color-background-alt);
  border-radius: var(--border-radius-sm);
}

.screenshots__carousel::-webkit-scrollbar-thumb {
  background: var(--color-text-secondary);
  border-radius: var(--border-radius-sm);
}

.screenshot-item {
  flex: 0 0 auto;
  scroll-snap-align: center;
  width: 280px;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: transform var(--transition-normal);
}

.screenshot-item:hover {
  transform: scale(1.02);
}

.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}


/* ====== Content Page Layouts (Privacy, Contact) ====== */

.content-page {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: calc(var(--header-height) + var(--spacing-2xl)) var(--spacing-md) var(--spacing-3xl);
}

.content-page__title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
}

.content-page__meta {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
}

.content-page__intro {
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-2xl);
}

.content-page h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-tight);
}

.content-page h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-tight);
}

.content-page p {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-md);
}

.content-page ul,
.content-page ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.content-page li {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-xs);
  list-style: disc;
}

.content-page a {
  color: var(--color-accent);
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.content-page a:hover {
  color: var(--color-accent-hover);
}

/* Contact Section Specific */
.contact-info {
  background: var(--color-background-alt);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

.contact-info__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-info__label {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.contact-info__link {
  color: var(--color-accent);
  font-size: var(--font-size-h4);
  transition: color var(--transition-fast);
}

.contact-info__link:hover {
  color: var(--color-accent-hover);
}


/* ====== Footer ====== */

.footer {
  background: var(--color-background-alt);
  padding: var(--spacing-2xl) var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-accent);
}

.footer-copyright {
  color: var(--color-text-secondary);
  font-size: var(--font-size-small);
}


/* ====== Scroll Animations ====== */

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
  /* Fallback: ensure content becomes visible even if JS fails */
  animation: fallback-reveal 0.01s ease-in 2s forwards;
}

@keyframes fallback-reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-animate].animate-in {
  opacity: 1;
  transform: translateY(0);
  animation: none;
  /* Cancel fallback if JS triggers properly */
}


/* ====== Skip Link (Accessibility) ====== */

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-accent);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  z-index: calc(var(--z-index-tooltip) + 1);
  border-radius: var(--border-radius-sm);
  font-weight: var(--font-weight-semibold);
}

.skip-link:focus {
  top: var(--spacing-xs);
}