/* Premium components */

/* Site Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: color-mix(in oklch, var(--color-canvas) 90%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 90rem;
  margin-inline: auto;
  padding: var(--space-sm) var(--space-md);
  gap: var(--space-lg);
}

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

.nav-logo {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-logo {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  /* Убедитесь, что основной цвет задан явно */
  color: var(--color-ink);
  text-decoration: none;
}

/* Плавно меняем цвет только внутри span */
.nav-logo span {
  color: var(--color-ink);
  transition: color var(--transition-fast);
}

/* ЭФФЕКТ ПРИ НАВЕДЕНИИ */

/* 1. Цвет первых букв меняем на акцентный */
.nav-logo:hover span {
  color: var(--color-accent);
}

/* 2. Цвет остального текста ПРИНУДИТЕЛЬНО оставляем прежним,
      чтобы он не становился синим или не менялся */
.nav-logo:hover {
  color: var(--color-ink);
}


.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

.nav-link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-subtle);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast),
              background var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-ink);
  background: var(--color-surface-tint);
}

.nav-link--active {
  color: var(--color-accent);
  background: var(--color-surface-accent);
}

/* Mobile menu toggle - CSS only solution */
.nav-toggle-checkbox {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast);
}

.nav-toggle:hover {
  background: var(--color-surface-tint);
  border-color: var(--color-border);
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--transition-base),
              opacity var(--transition-fast);
}

.nav-toggle-icon {
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

/* Toggle button active state (X icon) - using :checked */
.nav-toggle-checkbox:checked ~ .nav-toggle .nav-toggle-icon {
  background: transparent;
}

.nav-toggle-checkbox:checked ~ .nav-toggle .nav-toggle-icon::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle-checkbox:checked ~ .nav-toggle .nav-toggle-icon::after {
  transform: translateY(-6px) rotate(-45deg);
}

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

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

  .nav-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2xs);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border-light);
  }

  .nav-toggle-checkbox:checked ~ .nav-menu {
    display: flex;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-md);
  }
}

/* Card component */
.card {
  background: var(--color-canvas-elevated);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
}

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

.card--subtle {
  background: var(--color-surface-tint);
  border-color: transparent;
  box-shadow: none;
}

.card--accent {
  background: var(--color-surface-accent);
  border-color: color-mix(in oklch, var(--color-accent) 20%, transparent);
}

/* Section divider */
.divider {
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-border) 20%,
    var(--color-border) 80%,
    transparent
  );
  /*margin-block: var(--space-sm);*/
}

.divider--strong {
  background: var(--color-border-strong);
}

.divider--accent {
  height: 2px;
  background: linear-gradient(
    to right,
    transparent,
    var(--color-accent) 30%,
    var(--color-accent) 70%,
    transparent
  );
  opacity: 0.3;
}

/* Section component */
.section {
  padding-block: var(--space-2xl);
}

.section--hero {
  padding-block: var(--space-3xl);
}

.section--compact {
  padding-block: var(--space-xl);
}

/* Highlight box for important content */
.highlight {
  position: relative;
  padding: var(--space-xs);
  border-left: 3px solid var(--color-accent);
  background: var(--color-surface-accent);
  border-radius: var(--radius-md);
  margin-block: var(--space-lg);
}

.highlight::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  background: var(--gradient-premium);
  opacity: 0.4;
  pointer-events: none;
}

/* Badge component */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3xs) var(--space-xs);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  background: var(--color-surface-tint);
  border: 1px solid var(--color-border);
  color: var(--color-ink-subtle);
}

.badge--accent {
  background: var(--color-surface-accent);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Button component - refined */
.btn {
  --btn-padding: var(--space-sm) var(--space-lg);
  --btn-radius: var(--radius-md);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: var(--btn-padding);
  border-radius: var(--btn-radius);
  border: 1px solid var(--color-border);
  background: var(--btn-background, var(--color-canvas-elevated));
  color: var(--btn-color, var(--color-ink));
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: -0.011em;
  cursor: pointer;
  transition: background var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn--primary {
  --btn-background: var(--color-accent);
  --btn-color: white;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  --btn-background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  box-shadow: var(--shadow-lg);
}

.btn--ghost {
  --btn-background: transparent;
  border-color: var(--color-border-light);
  box-shadow: none;
}

.btn--ghost:hover {
  --btn-background: var(--color-surface-tint);
  border-color: var(--color-border);
}

.btn--large {
  --btn-padding: var(--space-md) var(--space-xl);
  font-size: var(--text-lg);
}

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

/* Link component */
a.link {
  position: relative;
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

a.link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-base);
}

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

a.link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* List with custom bullets */
.list-custom {
  list-style: none;
  padding: 0;
}

.list-custom li {
  position: relative;
  padding-inline-start: var(--space-lg);
  margin-block-end: var(--space-sm);
}

.list-custom li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
}

/* Responsive grid */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: var(--space-lg);
}

/* Article components */
.article-header {
  position: relative;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.breadcrumb-link {
  color: var(--color-ink-subtle);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}

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

.breadcrumb-separator {
  color: var(--color-ink-subtle);
  font-size: var(--text-sm);
  opacity: 0.5;
}

.breadcrumb-current {
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 500;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.article-content {
  line-height: 1.8;
}

.article-content h2 {
  margin-top: var(--space-xl);
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  margin-top: var(--space-lg);
}

.article-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: text-decoration-color var(--transition-fast);
}

.article-content a:hover {
  text-decoration-color: transparent;
}

/* Article footer with related links */
.article-footer a.card {
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition-base),
              box-shadow var(--transition-base);
}

.article-footer a.card:hover {
  transform: translateY(-2px);
}

/* Card with link inside - make whole card hover on link hover */
.card:has(.link:hover) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}