/**
 * Layout - Header, Footer, Navigation, Main Sections
 * Overall page structure and layout patterns
 */

/* Header */
.rt-topbar {
  background: var(--rt-bg);
  color: var(--rt-text-muted);
  border-bottom: 1px solid var(--rt-border);
  font-size: var(--rt-font-size-sm);
  padding: 0;
}

.rt-topbar .container {
  max-width: 100%;
  padding: 0;
}

.rt-topbar__content {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 40px;
}

.rt-topbar__contact {
  display: inline-flex;
  align-items: center;
  gap: var(--rt-spacing-sm);
}

/* Header Main */
.rt-header {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--rt-border);
  position: relative;
  z-index: var(--rt-z-fixed);
  transition: background-color var(--rt-transition-smooth);
}

[data-theme="dark"] .rt-header {
  background: rgba(11, 18, 32, 0.6);
}

.rt-header--scrolled {
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--rt-bg) 85%, transparent);
}

.rt-header__content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--rt-spacing-lg);
  padding: var(--rt-spacing-md) 0;
}

.rt-header__logo {
  flex-shrink: 0;
  line-height: 0;
}

.rt-header__logo img {
  height: 40px;
  width: auto;
  display: block;
}

.rt-header__logo-img--dark {
  display: none;
}

[data-theme="dark"] .rt-header__logo-img--light {
  display: none;
}

[data-theme="dark"] .rt-header__logo-img--dark {
  display: block;
}

/* Navigation */
.rt-nav {
  display: flex;
  align-items: center;
  gap: var(--rt-spacing-lg);
  flex-grow: 1;
  justify-content: center;
}

.rt-nav__menu {
  display: flex;
  list-style: none;
  gap: var(--rt-spacing-xs);
  margin: 0;
  padding: 0;
  justify-content: center;
}

.rt-nav__link {
  display: inline-block;
  padding: var(--rt-spacing-md) var(--rt-spacing-lg);
  color: var(--rt-text);
  text-decoration: none;
  font-weight: var(--rt-font-weight-medium);
  transition: color var(--rt-transition-normal);
  position: relative;
}

.rt-nav__link:hover,
.rt-nav__link--active {
  color: var(--rt-primary);
}

.rt-nav__link--active::after {
  content: '';
  position: absolute;
  bottom: var(--rt-spacing-xs);
  left: var(--rt-spacing-lg);
  right: var(--rt-spacing-lg);
  height: 2px;
  background: var(--rt-primary);
  border-radius: 1px;
}

.rt-nav__theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--rt-radius-full);
  border: 1px solid var(--rt-border);
  color: var(--rt-text);
  background: var(--rt-surface);
  transition: transform var(--rt-transition-normal), background-color var(--rt-transition-normal);
  cursor: pointer;
}

.rt-nav__theme-toggle:hover {
  transform: translateY(-2px);
  background: color-mix(in srgb, var(--rt-primary) 12%, var(--rt-surface));
}

.rt-nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--rt-text);
  font-size: var(--rt-font-size-2xl);
}

.rt-nav__toggle[aria-expanded="true"] {
  color: var(--rt-primary);
}

/* Hero Section */
.rt-hero {
  position: relative;
  padding: 92px 0 64px;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(37, 99, 235, 0.18), transparent 40%),
    radial-gradient(1000px 600px at 90% 10%, rgba(16, 185, 129, 0.14), transparent 45%),
    linear-gradient(180deg, var(--rt-surface-alt) 0%, var(--rt-bg) 60%);
  border-bottom: 1px solid var(--rt-border);
}

.rt-hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--rt-spacing-lg);
}

.rt-hero__title {
  font-size: var(--rt-font-size-5xl);
  font-family: var(--rt-font-heading);
  font-weight: var(--rt-font-weight-bold);
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--rt-text);
}

.rt-hero__subtitle {
  font-size: var(--rt-font-size-lg);
  color: var(--rt-text-muted);
  line-height: 1.6;
  max-width: 800px;
}

.rt-hero__actions {
  display: flex;
  gap: var(--rt-spacing-lg);
  flex-wrap: wrap;
  margin-top: var(--rt-spacing-lg);
}

.rt-hero__note {
  color: var(--rt-text-muted);
  font-size: var(--rt-font-size-sm);
}

/* Sections */
.rt-section {
  padding: var(--rt-spacing-2xl) 0;
}

main > .rt-section:first-child {
  padding-top: calc(var(--rt-spacing-2xl) - var(--rt-spacing-md));
}

.rt-section--expertises {
  background: var(--rt-bg);
}

.rt-section--why-us {
  background: var(--rt-surface);
}

.rt-section--rd {
  background: var(--rt-bg);
}

.rt-section--sensitive {
  background: var(--rt-surface);
}

.rt-section--trends {
  background: var(--rt-bg);
}

.rt-section--testimonials {
  background: var(--rt-surface);
}

.rt-section--contact {
  background: var(--rt-bg);
}

.rt-section__header {
  text-align: center;
  margin-bottom: var(--rt-spacing-xl);
}

.rt-section__label {
  display: inline-block;
  color: var(--rt-primary);
  font-weight: var(--rt-font-weight-semibold);
  font-size: var(--rt-font-size-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--rt-spacing-md);
}

.rt-section__title {
  font-size: var(--rt-font-size-4xl);
  font-family: var(--rt-font-heading);
  font-weight: var(--rt-font-weight-bold);
  margin-bottom: var(--rt-spacing-lg);
  color: var(--rt-text);
}

.rt-section__description {
  font-size: var(--rt-font-size-lg);
  color: var(--rt-text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.rt-section__cta {
  display: flex;
  gap: var(--rt-spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--rt-spacing-2xl);
}

.rt-section__cta--wide {
  justify-content: stretch;
}

.rt-section__cta--wide .rt-card {
  padding-top: var(--rt-spacing-xl);
  padding-bottom: var(--rt-spacing-xl);
}

/* Footer */
.rt-footer {
  background: var(--rt-surface);
  color: var(--rt-text-muted);
  border-top: 1px solid var(--rt-border);
}

.rt-footer__top {
  padding: var(--rt-spacing-2xl) 0 var(--rt-spacing-xl);
}

.rt-footer__content {
  display: flex;
  justify-content: center;
  align-items: center;
}

.rt-footer__info {
  text-align: center;
  width: fit-content;
  max-width: 420px;
  padding: 0 var(--rt-spacing-md);
}

.rt-footer__logo-link {
  display: inline-block;
  margin-bottom: var(--rt-spacing-lg);
}

.rt-footer__logo {
  width: min(100%, 240px);
  height: auto;
}

.rt-footer__logo--dark {
  display: none;
}

[data-theme="dark"] .rt-footer__logo--light {
  display: none;
}

[data-theme="dark"] .rt-footer__logo--dark {
  display: inline-block;
}

.rt-footer__mission {
  padding: var(--rt-spacing-lg);
  border-left: 4px solid var(--rt-primary);
  margin-bottom: var(--rt-spacing-lg);
  font-style: italic;
  color: var(--rt-text-muted);
  text-align: left;
}

.rt-footer__mission p {
  margin-bottom: 0;
}

.rt-footer__mission i {
  color: var(--rt-primary);
  margin: 0 var(--rt-spacing-sm);
}

.rt-footer__brand {
  font-size: var(--rt-font-size-2xl);
  font-weight: var(--rt-font-weight-bold);
  margin-bottom: var(--rt-spacing-md);
  color: var(--rt-text);
}

.rt-footer__contact {
  font-style: normal;
  color: var(--rt-text);
}

.rt-footer__contact p {
  margin-bottom: 0;
  line-height: 1.8;
}

.rt-footer__contact a {
  color: var(--rt-text);
  text-decoration: none;
  transition: color var(--rt-transition-normal);
}

.rt-footer__contact a:hover {
  color: var(--rt-primary);
}

.rt-footer__bottom {
  padding: var(--rt-spacing-lg) 0;
  border-top: 1px solid var(--rt-border);
}

.rt-footer__copyright {
  text-align: center;
  font-size: var(--rt-font-size-sm);
  color: var(--rt-text-muted);
}

/* Back to Top */
.rt-back-to-top {
  position: fixed;
  bottom: var(--rt-spacing-lg);
  right: var(--rt-spacing-lg);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--rt-primary);
  color: white;
  border-radius: var(--rt-radius-full);
  text-decoration: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--rt-transition-normal), 
              visibility var(--rt-transition-normal), 
              transform var(--rt-transition-normal);
  z-index: var(--rt-z-fixed);
  box-shadow: var(--rt-shadow);
}

.rt-back-to-top:focus-visible {
  outline: 2px solid var(--rt-accent);
  outline-offset: 2px;
}

.rt-back-to-top.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.rt-back-to-top:hover {
  background: var(--rt-accent);
  transform: translateY(-2px);
}

/* Preloader */
#preloader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--rt-z-preloader);
  background: var(--rt-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

#preloader::before {
  content: '';
  width: 50px;
  height: 50px;
  border: 4px solid var(--rt-surface);
  border-top-color: var(--rt-primary);
  border-radius: 50%;
  animation: rt-spin 1s linear infinite;
}

@keyframes rt-spin {
  to {
    transform: rotate(360deg);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .rt-header__content {
    padding: var(--rt-spacing-md) 0;
  }
  
  .rt-nav__menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    background: var(--rt-bg);
    z-index: calc(var(--rt-z-fixed) + 1);
    padding: var(--rt-spacing-2xl);
    gap: 0;
  }
  
  .rt-nav__menu.active {
    display: flex;
  }

  body.rt-no-scroll {
    overflow: hidden;
  }
  
  .rt-nav__toggle {
    display: flex;
  }
  
  .rt-hero {
    padding: 72px 0 48px;
  }
  
  .rt-hero__title {
    font-size: var(--rt-font-size-3xl);
  }
  
  .rt-hero__actions {
    flex-direction: column;
    gap: var(--rt-spacing-md);
  }
  
  .rt-section {
    padding: var(--rt-spacing-xl) 0;
  }
  
  .rt-section__header {
    margin-bottom: var(--rt-spacing-xl);
  }
  
  .rt-section__title {
    font-size: var(--rt-font-size-2xl);
  }
  
  .rt-back-to-top {
    width: 36px;
    height: 36px;
    bottom: var(--rt-spacing-md);
    right: var(--rt-spacing-md);
  }
}