/**
 * Layout Styles
 * Grid, containers, flexbox utilities, and page structure
 */

:root {
  --header-bg: rgba(255, 255, 255, 0.85);
  --header-blur: blur(12px);
}

/* ===========================================
   CONTAINER
   =========================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

.container-sm {
  max-width: var(--container-sm);
}

.container-md {
  max-width: var(--container-md);
}

.container-lg {
  max-width: var(--container-lg);
}

.container-fluid {
  max-width: 100%;
}

/* ===========================================
   PAGE STRUCTURE
   =========================================== */

.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding-top: var(--spacing-8);
  padding-bottom: var(--spacing-16);
}

/* ===========================================
   HEADER
   =========================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--header-bg);
  -webkit-backdrop-filter: var(--header-blur);
  backdrop-filter: var(--header-blur);
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.site-header.dropdown-open {
  background-color: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom-color: transparent;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-tight);
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.7;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  letter-spacing: var(--letter-spacing-wide);
  transition: color var(--transition-fast);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

/* ===========================================
   LANGUAGE SWITCHER
   =========================================== */

.language-switcher {
  position: static;
}

.language-dropdown {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: calc(var(--z-sticky) - 1);
  background-color: var(--header-bg);
  -webkit-backdrop-filter: var(--header-blur);
  backdrop-filter: var(--header-blur);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 0 var(--spacing-4);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.language-dropdown.is-open {
  max-height: 120px;
  padding: 76px var(--spacing-4) var(--spacing-3);
}

.language-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: var(--spacing-2) var(--spacing-4);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-20px);
}

.language-dropdown.is-open .language-option {
  animation: langOptionSlideIn 0.3s ease forwards;
  animation-delay: calc(var(--i, 0) * 0.05s);
}

@keyframes langOptionSlideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.language-option:hover {
  background: var(--color-background-alt);
  color: var(--color-text);
}

.language-option.is-active {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.language-option .lang-code {
  font-weight: var(--font-weight-semibold);
}

.language-option .lang-name {
  font-weight: var(--font-weight-normal);
}

.language-option.is-active .lang-name {
  color: var(--color-text-inverse);
}

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

.site-footer {
  background-color: var(--header-bg);
  -webkit-backdrop-filter: var(--header-blur);
  backdrop-filter: var(--header-blur);
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text);
  padding: var(--spacing-12) 0 var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-8);
}

.footer-column {
  display: flex;
  flex-direction: column;
}

.footer-title {
  font-family: var(--font-display);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-4);
  letter-spacing: var(--letter-spacing-tight);
}

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

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-bottom {
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-legal {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.footer-legal a {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: var(--color-text);
}

.footer-legal .divider-vertical {
  width: 1px;
  height: 12px;
  background-color: var(--color-border);
}

/* ===========================================
   GRID SYSTEM
   =========================================== */

.grid {
  display: grid;
  gap: var(--spacing-6);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-cols-5 {
  grid-template-columns: repeat(5, 1fr);
}

.grid-cols-6 {
  grid-template-columns: repeat(6, 1fr);
}

/* Auto-fit grid for product cards */
.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ===========================================
   FLEXBOX UTILITIES
   =========================================== */

.flex {
  display: flex;
}

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

.flex-row {
  flex-direction: row;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.items-start {
  align-items: flex-start;
}

.items-center {
  align-items: center;
}

.items-end {
  align-items: flex-end;
}

.items-stretch {
  align-items: stretch;
}

.justify-start {
  justify-content: flex-start;
}

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

.justify-end {
  justify-content: flex-end;
}

.justify-between {
  justify-content: space-between;
}

.justify-around {
  justify-content: space-around;
}

.justify-evenly {
  justify-content: space-evenly;
}

.flex-1 {
  flex: 1;
}

.flex-none {
  flex: none;
}

.flex-grow {
  flex-grow: 1;
}

.flex-shrink-0 {
  flex-shrink: 0;
}

/* ===========================================
   GAP UTILITIES
   =========================================== */

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-5 { gap: var(--spacing-5); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }
.gap-10 { gap: var(--spacing-10); }
.gap-12 { gap: var(--spacing-12); }

/* ===========================================
   SPACING UTILITIES
   =========================================== */

/* Margin */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-1); }
.m-2 { margin: var(--spacing-2); }
.m-4 { margin: var(--spacing-4); }
.m-6 { margin: var(--spacing-6); }
.m-8 { margin: var(--spacing-8); }
.m-auto { margin: auto; }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.pt-4 { padding-top: var(--spacing-4); }
.pt-6 { padding-top: var(--spacing-6); }
.pt-8 { padding-top: var(--spacing-8); }

.pb-4 { padding-bottom: var(--spacing-4); }
.pb-6 { padding-bottom: var(--spacing-6); }
.pb-8 { padding-bottom: var(--spacing-8); }

.px-4 { padding-left: var(--spacing-4); padding-right: var(--spacing-4); }
.py-4 { padding-top: var(--spacing-4); padding-bottom: var(--spacing-4); }
.py-8 { padding-top: var(--spacing-8); padding-bottom: var(--spacing-8); }

/* ===========================================
   WIDTH & HEIGHT
   =========================================== */

.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-full { max-width: 100%; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.min-h-screen { min-height: 100vh; }

/* ===========================================
   DISPLAY UTILITIES
   =========================================== */

.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* ===========================================
   POSITION UTILITIES
   =========================================== */

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.inset-0 {
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.top-0 { top: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }

/* ===========================================
   OVERFLOW
   =========================================== */

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* ===========================================
   SECTION SPACING
   =========================================== */

.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.section-lg {
  padding: var(--spacing-24) 0;
}

/* ===========================================
   RESPONSIVE LAYOUT
   =========================================== */

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: var(--spacing-4);
    padding-right: var(--spacing-4);
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }

  .header-nav {
    display: none;
  }

  .md-hidden {
    display: none;
  }

  .md-block {
    display: block;
  }
}

@media (min-width: 768px) {
  .md-grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .md-grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .md-grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .lg-grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .lg-grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===========================================
   SOCIAL MEDIA ICONS
   =========================================== */

.footer-social {
  display: flex;
  gap: var(--spacing-3);
  margin-top: var(--spacing-3);
}

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

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

.contact-social-links {
  display: flex;
  gap: var(--spacing-3);
  margin-top: var(--spacing-2);
}

.contact-social-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.contact-social-links a:hover {
  color: var(--color-accent);
}