/* ============================================
   LAYOUT — Nawigacja, Footer, Grid
   ============================================ */

/* ======== NAWIGACJA ======== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(6, 10, 19, 0.7);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav--scrolled {
  background: rgba(6, 10, 19, 0.92);
  box-shadow: var(--shadow-md);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  letter-spacing: var(--ls-tight);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__logo-dot {
  color: var(--accent);
}

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

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

.nav__link {
  position: relative;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__link:hover {
  color: var(--text-primary);
  background: var(--border-subtle);
}

.nav__link--active {
  color: var(--accent);
}

.nav__link--active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: var(--radius-full);
}

.nav__search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--duration-normal) var(--ease-out);
  margin-left: var(--space-sm);
}

.nav__search-btn:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

/* Mobile hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
}

/* ======== MAIN LAYOUT ======== */
.main {
  margin-top: var(--nav-height);
  min-height: calc(100vh - var(--nav-height));
}

.layout-with-sidebar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-width);
  gap: var(--space-3xl);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  overflow: hidden;
}

.layout-with-sidebar__content {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.layout-with-sidebar__sidebar {
  position: relative;
  display: flex;
  flex-direction: column;
}

/* ======== SIDEBAR ======== */
.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-2xl));
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* Na homepage sidebar nie sticky — rozciaga sie z contentem */
.sidebar--static {
  position: static;
  flex: 1;
}

.sidebar--static .sidebar__widget:last-child {
  flex: 1;
}

.sidebar__widget {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: border-color var(--duration-normal) var(--ease-out);
}

.sidebar__widget:hover {
  border-color: var(--border-default);
}

.sidebar__widget-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--ls-wider);
  margin-bottom: var(--space-lg);
}

/* Karta "O mnie" */
.about-card {
  text-align: center;
}

.about-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-md);
  object-fit: cover;
  border: 2px solid var(--border-subtle);
  transition: border-color var(--duration-normal) var(--ease-out);
}

.about-card:hover .about-card__avatar {
  border-color: var(--accent);
}

.about-card__name {
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-xs);
}

.about-card__role {
  font-size: var(--fs-sm);
  color: var(--accent);
  font-weight: var(--fw-medium);
  margin-bottom: var(--space-md);
}

.about-card__bio {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-lg);
}

.about-card__socials {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
}

.about-card__social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  background: var(--bg-secondary);
  transition: all var(--duration-normal) var(--ease-out);
}

.about-card__social:hover {
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

/* Trending */
.trending-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.trending-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
}

.trending-item:hover {
  transform: translateX(4px);
}

.trending-item__rank {
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  font-weight: var(--fw-extrabold);
  color: var(--bg-elevated);
  line-height: 1;
  min-width: 28px;
  transition: color var(--duration-normal) var(--ease-out);
}

.trending-item:hover .trending-item__rank {
  color: var(--accent);
}

.trending-item__title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-primary);
  line-height: var(--lh-snug);
  transition: color var(--duration-normal) var(--ease-out);
}

.trending-item:hover .trending-item__title {
  color: var(--accent);
}

.trending-item__meta {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  margin-top: 2px;
}

/* Chmura technologii */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tag-cloud__tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  font-family: var(--font-mono);
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
}

.tag-cloud__tag:hover {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--border-accent);
  transform: translateY(-1px);
}

/* Sidebar search */
.sidebar-search {
  position: relative;
}

.sidebar-search__input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  padding-left: 40px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--fs-sm);
  transition: all var(--duration-normal) var(--ease-out);
}

.sidebar-search__input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.sidebar-search__input::placeholder {
  color: var(--text-muted);
}

.sidebar-search__icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px;
  height: 16px;
  pointer-events: none;
}

/* ======== FOOTER ======== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-5xl);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer__copy {
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.footer__copy strong {
  color: var(--text-secondary);
  font-weight: var(--fw-semibold);
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__link {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

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

.footer__social {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
  transition: all var(--duration-normal) var(--ease-out);
}

.footer__social:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

/* ======== RESPONSIVE ======== */
@media (max-width: 1024px) {
  .layout-with-sidebar {
    grid-template-columns: 1fr;
  }

  .layout-with-sidebar__sidebar {
    order: -1;
  }

  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
    --fs-4xl: 2.25rem;
    --fs-3xl: 1.75rem;
    --fs-2xl: 1.5rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .layout-with-sidebar {
    padding: 0 var(--space-md);
    gap: var(--space-xl);
  }

  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__links--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    padding: var(--space-lg);
    gap: var(--space-xs);
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}