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

.reading-container {
  max-width: var(--reading-width);
  margin-left: auto;
  margin-right: auto;
}

section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
}

.section-light {
  background-color: var(--color-background);
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  height: var(--header-height);
}


.logo {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-subtitle {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-desktop {
  display: none;
}

@media (min-width: 1024px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
  }
}

.nav-link {
  color: var(--color-text-soft);
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Footer */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

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

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

.footer-heading {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
  color: var(--color-text);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

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

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-8);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* Grid System */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

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

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-6);
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}


/* Social Icons */
.social-icons {
  display: flex;
  gap: var(--spacing-3);
  margin-top: var(--spacing-4);
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
  transition: all 0.2s;
}

.social-icon:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.social-icon .icon {
  background-color: currentColor;
}

/* Mobile nav button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: transparent;
  cursor: pointer;
  transition: background-color 0.2s;
}

.mobile-menu-btn .icon {
  background-color: currentColor;
}

.mobile-menu-btn:hover {
  background-color: var(--color-surface);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Nav Dropdown */
.nav-mobile {
  display: none;
  flex-direction: column;
  gap: var(--spacing-2);
  padding: var(--spacing-4) var(--spacing-6) var(--spacing-6);
  border-top: 1px solid var(--color-border);
  background-color: #ffffff;
  width: 100%;
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.15);
}

.nav-mobile.open,
.nav-mobile.is-open {
  display: flex;
  animation: slideDownNav 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.nav-mobile .nav-link {
  display: block;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.nav-mobile .nav-link:hover,
.nav-mobile .nav-link.active {
  color: var(--color-primary);
  padding-left: var(--spacing-2);
}

.nav-mobile .btn-primary {
  margin-top: var(--spacing-3);
  width: 100%;
  text-align: center;
  justify-content: center;
}

@keyframes slideDownNav {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1024px) {
  .nav-mobile,
  .nav-mobile.open,
  .nav-mobile.is-open {
    display: none !important;
  }
}