/* ==========================================================================
   Etrexio Design System - Components
   ========================================================================== */

/* ==========================================================================
   Header / Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  background-color: rgba(250, 250, 250, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.site-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6);
  max-width: 1440px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .site-header-inner {
    padding: var(--space-8) var(--space-12);
  }
}

/* Logo */
.site-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-charcoal);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.site-logo:hover {
  opacity: 0.7;
  color: var(--color-charcoal);
}

.logo-img {
  height: 32px;
  width: auto;
  display: block;
}

@media (min-width: 768px) {
  .logo-img {
    height: 40px;
  }
}

/* Desktop Navigation */
.nav-desktop {
  display: none;
  gap: var(--space-8);
  align-items: center;
}

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

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-slate);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

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

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-charcoal);
  transition: opacity var(--transition-fast);
}

.mobile-menu-btn:hover {
  opacity: 0.7;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Navigation Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Navigation Panel */
.mobile-nav {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 320px;
  height: 100%;
  background-color: var(--color-surface);
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-charcoal);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
}

.mobile-nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-charcoal);
  text-decoration: none;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
}

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

.mobile-nav-link:last-child {
  border-bottom: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) var(--space-6);
  background-color: var(--color-background);
}

@media (min-width: 640px) {
  .site-footer {
    padding: var(--space-12);
  }
}

.site-footer-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .site-footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

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

.footer-social {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}

.footer-social-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-charcoal);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-charcoal);
  color: white;
  border-color: var(--color-charcoal);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-charcoal);
}

.btn-ghost:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.card-body {
  padding: var(--space-6);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-charcoal);
  margin-bottom: var(--space-2);
}

.card-text {
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: var(--leading-relaxed);
}

/* ==========================================================================
   Tags / Badges
   ========================================================================== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--color-primary);
  border-radius: var(--radius-full);
}

.tag-neutral {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--color-slate);
}

/* ==========================================================================
   Dividers
   ========================================================================== */
.divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-8) 0;
}

.divider-vertical {
  width: 1px;
  height: 24px;
  background-color: var(--color-border);
}