/* ==========================================================================
   YMobiDev — Site CSS
   Shared UI for public pages
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: transparent;
  border-bottom: 1px solid transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.site-nav.is-scrolled {
  background-color: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--color-border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.04);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

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

.nav-logo img {
  height: 28px;
  width: auto;
  object-fit: contain;
  filter: var(--filter-brand);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-menu a {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-gold-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 24px;
  padding: 4px 0;
  cursor: pointer;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-text-primary);
  border-radius: 2px;
  transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.brand-logo {
  display: block;
  max-width: 280px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
  filter: var(--filter-brand);
}

.site-footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverted);
  padding-block: var(--space-10);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-8);
  align-items: start;
}

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

.footer-logo {
  display: inline-flex;
}

.footer-logo img {
  width: 28px;
  height: auto;
}

.footer-brand p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  line-height: var(--leading-loose);
}

.footer-nav {
  display: flex;
  gap: var(--space-8);
}

.footer-col h3 {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-3);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.65);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--btn-padding);
  border-radius: var(--btn-radius);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  transition: all var(--transition-normal);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--color-gold-primary);
  color: #FFFFFF;
  border: 2px solid var(--color-gold-primary);
}

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border-subtle);
}

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

.btn-outline-gold {
  background-color: transparent;
  color: var(--color-gold-primary);
  border: 2px solid var(--color-gold-primary);
}

.btn-outline-gold:hover {
  background-color: var(--color-gold-primary);
  color: #FFFFFF;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 2px solid transparent;
  padding-inline: var(--space-2);
}

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

.btn-sm {
  padding: 0.5rem 1.25rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: var(--text-base);
}

.btn-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.btn-group--center {
  justify-content: center;
}

.badge-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.badge-group--center {
  justify-content: center;
}

.store-badge-img {
  display: inline-flex;
  align-items: center;
  height: 40px;
  position: relative;
  z-index: 1;
  text-decoration: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.store-badge-img:hover {
  opacity: 0.82;
  transform: translateY(-1px);
}

.store-badge-img img {
  height: 100%;
  width: auto;
  display: block;
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-subtle);
}

.tag--android {
  background-color: #E8F5E9;
  color: #2E7D32;
  border-color: #A5D6A7;
}

.tag--ios {
  background-color: #E3F2FD;
  color: #1565C0;
  border-color: #90CAF9;
}

.tag--web {
  background-color: #E6FFFB;
  color: #0F766E;
  border-color: #99F6E4;
}

.tag--gold {
  background-color: rgba(91, 108, 249, 0.1);
  color: var(--color-gold-dark);
  border-color: rgba(91, 108, 249, 0.3);
}

.hero {
  min-height: calc(90vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-block: var(--space-16);
}

.hero-eyebrow {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-gold-primary);
  margin-bottom: var(--space-3);
}

.hero h1 {
  font-size: clamp(2.7rem, 5vw, 4.25rem);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  max-width: 800px;
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: var(--leading-normal);
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-header h2 {
  font-size: clamp(2rem, 3vw, 2.7rem);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
}

.section-header p {
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  color: var(--color-text-secondary);
  line-height: 1.72;
}

.section-header--left {
  text-align: left;
  margin-inline: 0;
  max-width: 760px;
}

.cta-strip {
  padding-block: var(--space-12);
  background-color: var(--color-bg-dark);
  text-align: center;
}

.cta-strip h2 {
  font-size: var(--text-3xl);
  color: var(--color-text-inverted);
  margin-bottom: var(--space-2);
}

.cta-strip p {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: var(--space-6);
  max-width: 480px;
  margin-inline: auto;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-3);
  max-width: 800px;
  margin-inline: auto;
}

.feature-grid--app {
  max-width: none;
  margin-inline: 0;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3);
  background-color: var(--color-bg-secondary);
  border-radius: 8px;
}

.feature-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-gold-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-item p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-snug);
}

.page-header {
  padding-block: clamp(3.5rem, 7vw, 5rem);
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-subtle);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(2.2rem, 4vw, 3.25rem);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-2);
}

.page-header p {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.72;
}

.prose {
  line-height: var(--leading-loose);
  color: var(--color-text-secondary);
}

.prose h2 {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.prose h3 {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.prose p {
  margin-bottom: var(--space-3);
}

.prose ul,
.prose ol {
  list-style: disc;
  padding-left: var(--space-4);
  margin-bottom: var(--space-3);
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: var(--space-1);
}

.prose a {
  color: var(--color-gold-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose a:hover {
  color: var(--color-gold-primary);
}

.error-page {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-8);
}

.error-code {
  font-size: 6rem;
  font-weight: var(--weight-bold);
  color: var(--color-gold-primary);
  line-height: 1;
  margin-bottom: var(--space-3);
  opacity: 0.6;
}

.error-page h1 {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.error-page p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.hero-gradient {
  background:
    radial-gradient(ellipse at 15% 60%, rgba(91, 108, 249, 0.07) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 15%, rgba(129, 140, 248, 0.05) 0%, transparent 50%),
    var(--color-bg-primary);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

.home-hero {
  min-height: calc(82vh - var(--nav-height));
  display: flex;
  align-items: center;
  padding-block: clamp(4rem, 9vw, 7rem);
}

.hero-title {
  font-size: clamp(2.7rem, 5vw, 4.4rem);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.app-cards-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.site-cards-preview {
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.link-gold {
  color: var(--color-gold-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.app-card {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-4);
  align-items: start;
  padding: var(--space-4);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
  cursor: pointer;
}

.app-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.app-card-link {
  position: absolute;
  inset: 0;
  border-radius: var(--card-radius);
  z-index: 0;
}

.app-card-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  background-color: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.app-card-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-card-content h2 {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-1);
}

.app-card-content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-3);
}

.app-card-content .tag-group {
  margin-bottom: var(--space-3);
}

.service-card {
  padding: var(--space-5);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
}

.service-card:hover {
  border-color: var(--color-gold-primary);
  box-shadow: 0 6px 28px rgba(91, 108, 249, 0.1);
  transform: translateY(-2px);
}

.service-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-3);
  color: var(--color-gold-primary);
}

.service-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-2);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.site-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  cursor: pointer;
  transition: box-shadow var(--transition-normal), transform var(--transition-normal);
}

.site-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-2px);
}

.site-card-link {
  position: absolute;
  inset: 0;
  border-radius: var(--card-radius);
  z-index: 0;
}

.site-card-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background-color: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.site-card-icon svg {
  color: var(--color-gold-primary);
}

.site-card-body {
  flex: 1;
  min-width: 0;
}

.site-card-name {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-1);
}

.site-card-body .tag-group {
  margin-bottom: var(--space-2);
}

.site-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.site-card-cta {
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-subtle);
    padding: var(--space-2) 0;
  }

  .nav-menu.is-open {
    display: flex;
  }

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

  .nav-menu li:last-child {
    border-bottom: none;
  }

  .nav-menu a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-bottom: none;
    font-size: var(--text-base);
  }

  .nav-menu a:hover {
    background-color: var(--color-bg-secondary);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-nav {
    gap: var(--space-6);
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .app-card {
    grid-template-columns: 1fr;
  }
}