/* Wave Blog — serif для тела статьи, блоки контента. Подключать после styles.css */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,600;1,8..60,400&display=swap");

:root {
  --font-family-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --article-max: 50rem;
  --article-wide: 62rem;
}

/* ——— Страница ——— */
.blog-page {
  background: var(--color-bg);
}

.blog-page .site-header {
  background-color: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--zinc-100);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.blog-main {
  padding-top: calc(1.5rem + var(--site-header-h));
  padding-bottom: 4rem;
}

@media (min-width: 640px) {
  .blog-main {
    padding-top: calc(2.5rem + var(--site-header-h));
    padding-bottom: 5rem;
  }
}

/* ——— Сетка: статья + sticky TOC справа ——— */
.blog-article-layout {
  margin: 0 auto;
  padding: 0 1rem;
  max-width: var(--article-wide);
}

@media (min-width: 1100px) {
  .blog-article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 13rem;
    gap: 2.25rem;
    align-items: start;
    max-width: calc(var(--article-wide) + 16rem);
  }
}

.blog-article {
  margin: 0 auto;
  max-width: var(--article-wide);
  padding: 0;
  min-width: 0;
}

@media (max-width: 1099px) {
  .blog-article-layout {
    padding: 0 1rem;
  }

  .blog-article {
    padding: 0;
  }

  .article-toc {
    display: none;
  }
}

/* ——— Sticky TOC (rail + прогресс) ——— */
.article-toc {
  display: none;
  font-family: var(--font-family-sans);
}

@media (min-width: 1100px) {
  .article-toc {
    display: block;
    position: sticky;
    top: calc(var(--site-header-h) + 1.5rem);
    max-height: calc(100dvh - var(--site-header-h) - 3rem);
    overflow-y: auto;
    overflow-x: visible;
    padding: 0 0.25rem 1rem 0.375rem;
    scrollbar-width: thin;
  }
}

.article-toc-inner {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
}

.article-toc-rail {
  position: relative;
  flex-shrink: 0;
  width: 1.125rem;
  min-height: 100%;
  overflow: visible;
}

.article-toc-rail-svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.article-toc-rail-track,
.article-toc-rail-progress {
  stroke-width: 2;
  stroke-linecap: butt;
  stroke-linejoin: round;
}

.article-toc-rail-track {
  stroke: var(--color-border);
  opacity: 0.55;
}

.article-toc-rail-progress {
  filter: drop-shadow(0 0 5px rgb(0 119 230 / 0.28));
}

.article-toc-rail-progress.is-wave-pulse {
  filter: drop-shadow(0 0 10px rgb(0 119 230 / 0.55));
}

@media (prefers-reduced-motion: reduce) {
  .article-toc-rail-progress.is-wave-pulse {
    filter: drop-shadow(0 0 5px rgb(0 119 230 / 0.28));
  }
}

.article-toc-list {
  flex: 1;
  min-width: 0;
  list-style: none;
  margin: 0;
  padding: 0 0.125rem 0 0;
}

.article-toc-item + .article-toc-item {
  margin-top: 0.625rem;
}

.article-toc-link {
  display: block;
  padding: 0.15rem 0;
  font-size: 0.8125rem;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--zinc-400);
  text-decoration: none;
  cursor: pointer;
  overflow-wrap: break-word;
  transition: color 0.2s ease;
}

.article-toc-link:hover {
  color: var(--zinc-600);
}

.article-toc-link:focus-visible {
  outline: 2px solid var(--wave-ocean);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Пройденные + текущий — тёмные; только впереди — серые */
.article-toc-item.is-read .article-toc-link,
.article-toc-item.is-active .article-toc-link {
  color: var(--ink);
}

.article-toc-item.is-active .article-toc-link {
  font-weight: 600;
  color: var(--wave-ocean);
}

.article-toc-item.is-pending .article-toc-link {
  color: var(--zinc-400);
}

.article-toc-item.is-pending:hover .article-toc-link {
  color: var(--zinc-500);
}

/* ——— Hero статьи ——— */

.article-hero {
  max-width: var(--article-max);
  margin: 0 auto 2.5rem;
}

.article-hero .article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  margin: 0 0 1rem;
  font-family: var(--font-family-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.article-hero .section-title {
  margin: 0;
}

.article-lead {
  margin: 1.25rem 0 0;
  font-family: var(--font-family-serif);
  font-size: 1.1875rem;
  line-height: 1.55;
  color: var(--color-text);
}

@media (min-width: 640px) {
  .article-lead {
    font-size: 1.3125rem;
  }
}

/* ——— Тело (serif) ——— */
.article-body {
  max-width: var(--article-max);
  margin: 0 auto;
  font-family: var(--font-family-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--color-text);
}

.article-body > * + * {
  margin-top: 1.25rem;
}

.article-body h2,
.article-body h3 {
  font-family: var(--font-family-sans);
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.article-body h2 {
  margin-top: 2.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.article-body h3 {
  margin-top: 2rem;
  font-size: 1.1875rem;
  font-weight: 600;
}

@media (min-width: 640px) {
  .article-body h2 {
    font-size: 1.75rem;
  }
}

.article-body p {
  margin: 0;
}

.article-body a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--wave-spray);
  text-underline-offset: 0.15em;
}

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

.article-body ul,
.article-body ol {
  margin: 0;
  padding-left: 1.35rem;
}

.article-body li + li {
  margin-top: 0.5rem;
}

.article-body strong {
  font-weight: 600;
}

/* ——— Цитата ——— */
.article-quote {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--wave-ocean);
  background: var(--color-bg-muted);
  border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  font-size: 1.125rem;
  font-style: italic;
  color: var(--wave-depth);
}

.article-quote cite {
  display: block;
  margin-top: 0.75rem;
  font-size: 0.875rem;
  font-style: normal;
  font-family: var(--font-family-sans);
  color: var(--color-text-muted);
}

/* ——— Рисунки ——— */
.article-figure {
  margin: 2rem 0;
  max-width: 100%;
}

.article-figure picture {
  display: block;
  width: 100%;
}

.article-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border-subtle);
  background: var(--color-bg-muted);
}

.article-figure figcaption {
  margin-top: 0.625rem;
  font-family: var(--font-family-sans);
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.article-figure--wide {
  max-width: var(--article-wide);
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .article-figure--wide {
    width: calc(100% + 4rem);
    max-width: none;
    margin-left: -2rem;
    margin-right: -2rem;
  }
}

/* ——— Split: текст + фото ——— */
.article-split {
  display: grid;
  gap: 1.5rem;
  margin: 2rem 0;
}

@media (min-width: 768px) {
  .article-split {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 2rem;
  }
}

/* ——— Таблица ——— */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
}

.article-table {
  width: 100%;
  min-width: 28rem;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

.article-table th,
.article-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-subtle);
}

.article-table th {
  font-family: var(--font-family-sans);
  font-weight: 600;
  font-size: 0.8125rem;
  background: var(--color-bg-muted);
  color: var(--wave-depth);
}

.article-table tr:last-child td {
  border-bottom: none;
}

/* ——— Статистика ——— */
.article-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  list-style: none;
  margin: 2rem 0;
  padding: 0;
  font-family: var(--font-family-sans);
}

@media (min-width: 480px) {
  .article-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

.article-stats li {
  padding: 1.25rem;
  border-radius: var(--radius-2xl);
  background: var(--breakthrough-stat-bg);
  color: var(--breakthrough-stat-fg);
}

.article-stats .stat-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.article-stats .stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.8125rem;
  line-height: 1.4;
  opacity: 0.85;
}

/* ——— Callout ——— */
.article-callout {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  background: linear-gradient(165deg, var(--color-bg-muted) 0%, var(--color-bg) 100%);
  font-family: var(--font-family-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.article-callout strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1rem;
  color: var(--ink);
}

/* ——— Шаги ——— */
.article-steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}

.article-steps li {
  position: relative;
  padding-left: 2.75rem;
  counter-increment: step;
}

.article-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--wave-foam);
  background: var(--wave-ocean);
  border-radius: 50%;
}

.article-steps li + li {
  margin-top: 1.25rem;
}

/* ——— Диаграмма ——— */
.article-diagram svg,
.article-diagram img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* ——— Источники ——— */
.article-sources {
  max-width: var(--article-max);
  margin: 3rem auto 0;
  padding: 2rem 1rem 0;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-family-sans);
}

.article-sources h2 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
}

.article-sources ol {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.article-sources a {
  color: var(--color-accent);
  word-break: break-word;
}

.article-sources li + li {
  margin-top: 0.75rem;
}

/* ——— Подпись Wave ——— */
.article-wave-outro {
  max-width: var(--article-max);
  margin: 2.5rem auto 0;
  padding: 1.5rem;
  border-radius: var(--radius-2xl);
  background: var(--wave-mist);
  font-family: var(--font-family-serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--wave-depth);
}

.article-wave-outro p {
  margin: 0;
}

.article-wave-outro p + p {
  margin-top: 0.75rem;
}

.article-wave-outro a {
  font-family: var(--font-family-sans);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-style: wavy;
  text-underline-offset: 0.2em;
}

/* ——— Индекс блога (сетка + фильтры) ——— */
.blog-index-page .blog-index-intro {
  margin: 0 0 2rem;
  max-width: 40rem;
}

.blog-index-page .blog-index-intro .section-title {
  margin: 0;
}

.blog-index-page .blog-index-lead {
  margin: 0.75rem 0 0;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.blog-index-shell {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 960px) {
  .blog-index-shell {
    grid-template-columns: 14.5rem minmax(0, 1fr);
    gap: 2.75rem;
  }
}

.blog-index-sidebar {
  font-family: var(--font-family-sans);
}

.blog-index-sidebar__title {
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.blog-index-filters {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.blog-index-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.blog-index-field label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--ink);
}

.blog-index-field select {
  width: 100%;
  padding: 0.625rem 2rem 0.625rem 0.75rem;
  font: inherit;
  font-size: 0.875rem;
  color: var(--ink);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  appearance: none;
  background-image: url("/icons/chevron-down.svg");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.blog-index-field select:hover {
  border-color: var(--wave-spray);
}

.blog-index-field select:focus-visible {
  outline: none;
  border-color: var(--wave-ocean);
  box-shadow: 0 0 0 3px rgb(0 119 230 / 0.15);
}

.blog-index-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 1.5rem;
}

.blog-index-search {
  flex: 1 1 14rem;
  position: relative;
}

.blog-index-search svg {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  width: 1.125rem;
  height: 1.125rem;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.blog-index-search input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--color-bg-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-2xl);
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.blog-index-search input::placeholder {
  color: var(--color-text-muted);
}

.blog-index-search input:hover {
  background: var(--color-bg);
  border-color: var(--color-border);
}

.blog-index-search input:focus-visible {
  outline: none;
  background: var(--color-bg);
  border-color: var(--wave-ocean);
  box-shadow: 0 0 0 3px rgb(0 119 230 / 0.12);
}

.blog-index-view {
  display: inline-flex;
  padding: 0.2rem;
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-2xl);
}

.blog-index-view button {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  font-family: var(--font-family-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-2xl) - 0.15rem);
  cursor: pointer;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

.blog-index-view button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--color-bg);
  box-shadow: 0 1px 3px rgb(10 22 40 / 0.08);
}

.blog-index-view button:focus-visible {
  outline: 2px solid var(--wave-ocean);
  outline-offset: 2px;
}

.blog-index-view button svg {
  width: 1rem;
  height: 1rem;
}

.blog-cards {
  display: grid;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.blog-cards[data-view="grid"] {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .blog-cards[data-view="grid"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .blog-cards[data-view="grid"] {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.blog-cards[data-view="list"] {
  grid-template-columns: 1fr;
  gap: 1rem;
}

.blog-card {
  min-width: 0;
}

.blog-card[hidden] {
  display: none;
}

.blog-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  transition:
    border-color 0.22s ease,
    box-shadow 0.22s ease,
    transform 0.22s ease;
}

.blog-card__link:hover {
  border-color: var(--wave-spray);
  box-shadow: 0 12px 32px rgb(0 119 230 / 0.1);
  transform: translateY(-2px);
}

.blog-card__link:focus-visible {
  outline: 2px solid var(--wave-ocean);
  outline-offset: 3px;
}

.blog-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(145deg, var(--wave-mist) 0%, var(--wave-spray) 100%);
}

.blog-card__media--ocean {
  background: linear-gradient(145deg, var(--wave-sky) 0%, var(--wave-ocean) 100%);
}

.blog-card__media--depth {
  background: linear-gradient(145deg, var(--wave-depth) 0%, #1a3358 100%);
}

.blog-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.blog-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.125rem 1.25rem 1.25rem;
  font-family: var(--font-family-sans);
}

.blog-card__date {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.blog-card__title {
  margin: 0;
  font-family: var(--font-family-serif);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.blog-card__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--wave-ocean);
}

.blog-card__tag svg {
  width: 0.875rem;
  height: 0.875rem;
  opacity: 0.85;
}

.blog-cards[data-view="list"] .blog-card__link {
  flex-direction: row;
  align-items: stretch;
}

@media (max-width: 639px) {
  .blog-cards[data-view="list"] .blog-card__link {
    flex-direction: column;
  }
}

.blog-cards[data-view="list"] .blog-card__media {
  flex: 0 0 11rem;
  aspect-ratio: auto;
  min-height: 8rem;
}

@media (max-width: 639px) {
  .blog-cards[data-view="list"] .blog-card__media {
    flex: none;
    aspect-ratio: 16 / 10;
  }
}

.blog-index-empty {
  margin: 2rem 0 0;
  padding: 2rem;
  text-align: center;
  font-family: var(--font-family-sans);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  background: var(--color-bg-muted);
  border-radius: var(--radius-2xl);
}

.blog-index-empty[hidden] {
  display: none;
}