/* Learnwall blog — article + feed hub. Tokens from site.css (:root).
   Mobile chrome mirrors SBR blog header (≤768: brand | EN/PL + search + burger). */

:root {
  --header-h: 64px;
  --blog-ease: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Sticky header ─── */
.blog-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(242, 244, 247, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--divider);
}

.blog-header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.blog-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-family: var(--heading);
  font-weight: 700;
  font-size: 22px;
  text-decoration: none;
  min-width: 0;
}

.blog-brand:hover { color: var(--ink); }

.blog-brand img {
  width: 36px;
  height: 36px;
  display: block;
  flex-shrink: 0;
  border-radius: 10px;
}

.blog-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin-left: auto;
}

.blog-nav a {
  color: var(--ink-2);
  font-size: 15px;
  text-decoration: none;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 6px;
  border-radius: 10px;
}

.blog-nav a:hover,
.blog-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--divider);
}

.blog-header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.blog-lang {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: 999px;
  background: var(--paper);
  border: 1px solid var(--border);
}

.blog-lang a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 36px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.blog-lang a:hover { color: var(--ink); }

.blog-lang a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.blog-search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-2);
  cursor: pointer;
}

.blog-search-btn:hover,
.blog-search-btn[aria-expanded="true"] {
  color: var(--accent-strong);
  border-color: var(--accent-border);
  background: var(--accent-soft);
}

.blog-search-btn svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.blog-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.blog-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform var(--blog-ease), opacity var(--blog-ease);
}

.blog-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.blog-menu-btn.active span:nth-child(2) { opacity: 0; }
.blog-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .blog-header-inner {
    max-width: 100%;
    width: 100%;
    margin: 0;
    padding: 0 0.75rem;
    gap: 0.5rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .blog-brand {
    grid-column: 1;
    font-size: 0.95rem;
  }

  .blog-brand img {
    width: 30px;
    height: 30px;
  }

  .blog-header-actions {
    grid-column: 2;
    justify-self: end;
    gap: 0.35rem;
    z-index: 2;
  }

  .blog-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    margin: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--divider);
    flex-direction: column;
    align-items: stretch;
    padding: 1.25rem 0.75rem 1.5rem;
    gap: 0.35rem;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    z-index: 99;
    box-shadow: 0 16px 40px rgba(16, 24, 40, 0.08);
  }

  .blog-nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .blog-nav a {
    min-height: 48px;
    padding: 0 12px;
    font-size: 1rem;
  }

  .blog-menu-btn {
    display: inline-flex;
    flex-shrink: 0;
  }
}

/* ─── Search dialog ─── */
.blog-search-dialog {
  padding: 0;
  border: 0;
  border-radius: 18px;
  width: min(560px, 94vw);
  background: var(--paper);
  box-shadow: 0 24px 64px rgba(16, 24, 40, 0.2);
}

.blog-search-dialog::backdrop {
  background: rgba(16, 24, 40, 0.55);
}

.blog-search-dialog-inner {
  padding: 1.1rem 1.1rem 1.25rem;
}

.blog-search-dialog label {
  display: block;
  margin: 0 0 0.5rem;
  color: var(--ink-2);
  font-size: 0.85rem;
  font-weight: 600;
}

.blog-search-dialog input[type="search"] {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  font: inherit;
  font-size: 1rem;
  background: var(--bg);
  color: var(--ink);
}

.blog-search-dialog input[type="search"]:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.blog-search-hits {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  max-height: min(50vh, 360px);
  overflow: auto;
}

.blog-search-hits li { margin: 0 0 0.35rem; }

.blog-search-hits a {
  display: block;
  padding: 0.75rem 0.85rem;
  border-radius: 12px;
  text-decoration: none;
  color: var(--ink);
  background: var(--bg);
}

.blog-search-hits a:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.blog-search-empty {
  margin: 1rem 0 0;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.blog-search-close {
  margin-top: 0.85rem;
  min-height: 44px;
  padding: 0 14px;
  border: 0;
  border-radius: 12px;
  background: var(--divider);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

/* ─── Main / article ─── */
.blog-main {
  padding: 12px 0 72px;
}

.blog-article {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.blog-hero {
  display: grid;
  gap: 28px;
  padding: 28px 0 12px;
  margin-bottom: 8px;
}

@media (min-width: 860px) {
  .blog-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    padding-top: 36px;
  }
}

.blog-hero-copy { min-width: 0; }

.blog-kicker {
  margin: 0 0 10px;
  color: var(--accent);
  font-family: var(--heading);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.blog-date {
  display: block;
  margin: 0 0 16px;
  color: var(--ink-2);
  font-size: 14px;
}

.blog-article h1,
.blog-feed-intro h1 {
  margin: 0 0 16px;
  font-size: clamp(1.85rem, 4.2vw, 2.55rem);
  line-height: 1.12;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.blog-lead {
  margin: 0 0 22px;
  color: var(--ink-2);
  font-size: 1.125rem;
  line-height: 1.55;
}

.blog-cta-row { margin: 0 0 8px; }
.blog-cta-row-end { margin: 40px 0 8px; }

.blog-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 22px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff !important;
  font-family: var(--heading);
  font-weight: 700;
  font-size: 16px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(47, 84, 235, 0.22);
  transition: background 0.15s ease, transform 0.15s ease;
}

.blog-btn:hover {
  background: var(--accent-strong);
  color: #fff !important;
  transform: translateY(-1px);
}

.blog-link-secondary {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-left: 12px;
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

.blog-figure {
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--lock);
  box-shadow: 0 16px 40px rgba(16, 24, 40, 0.08);
  max-width: 280px;
  justify-self: center;
}

.blog-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(520px, 70vh);
  object-fit: contain;
  object-position: top center;
}

.blog-zoom {
  display: block;
  width: 100%;
  padding: 0;
  margin: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
  text-align: inherit;
}

.blog-zoom:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.blog-zoom-hint {
  display: block;
  margin: 8px 0 0;
  color: var(--ink-2);
  font-size: 12px;
  text-align: center;
}

#blog-lightbox {
  padding: 0;
  border: 0;
  border-radius: 16px;
  max-width: min(920px, 96vw);
  max-height: 94vh;
  background: #0b1220;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
}

#blog-lightbox::backdrop { background: rgba(16, 24, 40, 0.72); }

#blog-lightbox-img {
  display: block;
  max-width: min(900px, 94vw);
  max-height: 88vh;
  width: auto;
  height: auto;
  margin: 0 auto;
  object-fit: contain;
}

#blog-lightbox [data-blog-lightbox-close] {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  min-width: 44px;
  min-height: 44px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #101828;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

@media (min-width: 860px) {
  .blog-figure {
    max-width: 300px;
    justify-self: end;
  }
}

.blog-body {
  margin-top: 8px;
  padding: 28px 0 8px;
  border-top: 1px solid var(--divider);
}

.blog-body h2 {
  margin: 36px 0 12px;
  font-size: 1.4rem;
  line-height: 1.25;
  color: var(--ink);
}

.blog-body h2:first-child { margin-top: 8px; }

.blog-body h3 {
  margin: 22px 0 8px;
  font-size: 1.08rem;
  line-height: 1.35;
  color: var(--ink);
}

.blog-body p { margin: 0 0 14px; color: var(--ink); }

.blog-body ol,
.blog-body ul {
  margin: 0 0 16px;
  padding-left: 1.25rem;
  color: var(--ink);
}

.blog-body li { margin: 0 0 10px; padding-left: 4px; }
.blog-body li::marker { color: var(--accent); font-weight: 700; }
.blog-body a { font-weight: 600; }

.blog-faq { margin: 32px 0; padding: 8px 0 4px; }
.blog-faq h2 { margin-top: 0; }

.blog-faq h3 {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--divider);
}

.blog-faq h3:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.blog-related {
  margin: 40px 0 32px;
  padding: 22px 20px 20px;
  border-radius: 18px;
  background: var(--paper);
  border: 1px solid var(--border);
}

.blog-related h2 {
  margin: 0 0 14px;
  font-size: 1.15rem;
}

.blog-related ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.blog-related li { margin: 0; padding: 0; }

.blog-related-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

@media (min-width: 560px) {
  .blog-related-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

.blog-related-cards a {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  min-height: 64px;
  padding: 12px 44px 12px 16px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg);
  text-decoration: none;
  transition: background var(--blog-ease), border-color var(--blog-ease);
}

.blog-related-cards a::after {
  content: "\2192";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-weight: 700;
  transition: transform var(--blog-ease);
}

.blog-related-cards a:hover {
  background: var(--accent-soft);
  border-color: var(--accent-border);
}

.blog-related-cards a:hover::after { transform: translate(3px, -50%); }

.blog-related-title {
  color: var(--ink);
  font-family: var(--heading);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.blog-related-desc {
  color: var(--ink-2);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.35;
}

.blog-related .blog-related-label {
  margin: 20px 0 10px;
  color: var(--ink-2);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.blog-related-soon {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.blog-related-soon li {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px dashed var(--border);
  color: var(--ink-2);
  font-size: 0.875rem;
  line-height: 1.3;
}

.blog-footer {
  border-top: 1px solid var(--divider);
  padding: 28px 0 48px;
  background: var(--bg);
}

.blog-footer-inner,
.blog-footer .wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: baseline;
  justify-content: space-between;
}

.blog-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
}

.blog-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 8px;
  color: var(--ink-2);
  text-decoration: none;
  border-radius: 10px;
}

.blog-footer a:hover {
  color: var(--ink);
  background: var(--divider);
}

.blog-footer p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14px;
}

@media (max-width: 720px) {
  .blog-hero { padding-top: 16px; gap: 20px; }
  .blog-body h2 { margin-top: 28px; }
  .blog-btn { width: 100%; }
  .blog-link-secondary { margin-left: 0; margin-top: 8px; }
}

/* ─── Feed hub (SBR-like, Learnwall light theme) ─── */
.blog-feed-page .blog-main {
  padding-top: 8px;
}

.blog-feed-shell {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px 40px;
}

.blog-feed-intro {
  max-width: min(52rem, 100%);
  padding: 28px 0 8px;
}

.blog-feed-intro .blog-lead {
  max-width: none;
  text-wrap: pretty;
}

.blog-lead br {
  display: block;
  content: "";
  margin-top: 0.35em;
}

.blog-feed-intro h1 {
  margin: 0 0 12px;
}

.blog-feed-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin: 8px 0 28px;
}

.blog-feed-count {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.blog-card-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .blog-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .blog-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.blog-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--paper);
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(16, 24, 40, 0.06);
  transition: transform var(--blog-ease), box-shadow var(--blog-ease);
}

.blog-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(16, 24, 40, 0.1);
}

.blog-card a.blog-card-link,
.blog-card .blog-card-link {
  display: flex;
  flex-direction: column;
  flex: 1;
  color: inherit;
  text-decoration: none;
  min-height: 100%;
}

.blog-card-media {
  aspect-ratio: 16 / 10;
  background: var(--lock);
  overflow: hidden;
}

.blog-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.blog-card-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 1.1rem 1.15rem 1.25rem;
  flex: 1;
}

.blog-card-meta {
  margin: 0;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.blog-card-title {
  margin: 0;
  font-family: var(--heading);
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--ink);
}

.blog-card-teaser {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.98rem;
  line-height: 1.5;
  flex: 1;
}

.blog-card-cta {
  margin-top: 0.5rem;
  color: var(--accent-strong);
  font-weight: 700;
  font-size: 0.95rem;
}

.blog-card.is-soon {
  opacity: 0.78;
  box-shadow: none;
}

.blog-card.is-soon:hover { transform: none; }

.blog-card.is-soon .blog-card-media {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: var(--heading);
  font-weight: 700;
  font-size: 0.95rem;
}

.blog-card.is-soon .blog-card-cta { color: var(--ink-2); font-weight: 600; }

.blog-feed-empty {
  margin: 2rem 0;
  padding: 1.5rem;
  border-radius: 16px;
  background: var(--paper);
  border: 1px dashed var(--border);
  color: var(--ink-2);
}

@media (max-width: 768px) {
  .blog-feed-shell { padding: 0 0.75rem 40px; }
}

.blog-disclosure {
  margin: 32px 0 0;
  color: var(--ink-2);
  font-size: 0.875rem;
  line-height: 1.5;
}