/* Article & Library pages */
.article-page {
  padding: 56px 0 92px;
  background: var(--color-bg);
}

.article-page__header {
  max-width: 900px;
  margin: 0 auto 44px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
}

.article-page__category {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 5px 12px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.article-page__header h1 {
  font-size: clamp(2rem, 4vw, 42px);
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--color-heading);
  line-height: 1.2;
}

.article-page__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 14px;
}

.article-page__meta span {
  padding-right: 12px;
  border-right: 1px solid var(--color-border);
}

.article-page__meta span:last-child {
  border-right: 0;
  padding-right: 0;
}

.article-page__desc {
  font-size: 18px;
  color: var(--color-text);
  line-height: 1.8;
}

.article-page__content {
  max-width: 900px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.86;
  color: var(--color-text);
}

.article-page__content--flow {
  max-width: 900px;
  clear: both;
}

.article-page__content h2 { font-size: clamp(1.6rem, 2.8vw, 32px); margin: 44px 0 16px; line-height: 1.3; color: var(--color-heading); }
.article-page__content h3 { font-size: clamp(1.25rem, 2.2vw, 26px); margin: 34px 0 12px; line-height: 1.35; color: var(--color-primary); }
.article-page__content h4,
.article-page__content h5,
.article-page__content h6 { font-size: 1.15rem; margin: 30px 0 10px; color: var(--color-primary); }

.article-list {
  margin: 0 0 1.4em;
  padding-left: 1.4em;
  line-height: 1.8;
}

.article-list li {
  margin-bottom: 0.55em;
}

.article-page__content p { margin: 0 0 1.2em; }
.article-intro {
  font-size: 1.12em;
  line-height: 1.92;
  color: #2a3a4c;
  margin-bottom: 1.6em;
  font-weight: 500;
}

.article-label {
  color: var(--color-primary);
  font-weight: 700;
}

.article-page__content .article-list {
  list-style: disc;
  padding-left: 1.5em;
}

.article-page__content .article-list li::marker {
  color: var(--color-primary);
}

.article-page__content a {
  color: var(--color-primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
}

.article-page__content blockquote {
  margin: 28px 0;
  padding: 12px 18px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-alt);
  border-radius: 6px;
}

.article-page__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}

.article-page__content th,
.article-page__content td {
  border: 1px solid var(--color-border);
  padding: 10px 12px;
}

.article-page__content code {
  font-family: Consolas, Monaco, monospace;
  background: #eef3f8;
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.9em;
}

.article-page__content pre {
  margin: 24px 0;
  padding: 14px;
  overflow-x: auto;
  border-radius: 8px;
  background: #111827;
  color: #f9fafb;
}

.article-callout {
  margin: 22px 0;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: #f8fbff;
}
.article-callout strong {
  display: block;
  margin-bottom: 6px;
}
.article-callout--key { border-left: 4px solid #1f4575; }
.article-callout--tip { border-left: 4px solid #2a7299; background: #f1f9fd; }
.article-callout--note { border-left: 4px solid #6b7280; background: #f5f6f8; }
.article-callout--warn { border-left: 4px solid #b45309; background: #fff7ed; }
.article-callout--best { border-left: 4px solid #065f46; background: #ecfdf5; }
.article-callout--remember { border-left: 4px solid #4f46e5; background: #eef2ff; }

.article-toc {
  position: static;
  max-width: 900px;
  margin: 0 auto 32px;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  clear: both;
}
.article-toc h4 {
  margin: 0 0 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-primary);
}
.article-toc ol {
  margin: 0;
  padding-left: 18px;
}
.article-toc li { margin: 4px 0; }
.article-toc li.toc-l3 { margin-left: 14px; }
.article-toc a {
  color: var(--color-text);
  text-decoration: none;
}
.article-toc a:hover { color: var(--color-primary); }

/* Figures */
.article-page__content {
  overflow: hidden;
}

.article-page__content::after {
  content: '';
  display: table;
  clear: both;
}

.article-figure {
  margin: 34px auto;
  text-align: center;
}

.article-figure--wide,
.article-figure--medium,
.article-figure--full,
.article-figure--hero,
.article-figure--center,
.article-figure-grid {
  clear: both;
}

.article-figure img {
  width: auto;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: block;
  margin: 0 auto;
  object-fit: contain;
  transition: transform .2s ease, box-shadow .2s ease;
}

.article-figure:hover img {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.article-figure--hero,
.article-figure--cover {
  width: 100%;
  max-width: 100%;
  margin: 0 auto 40px;
  background: var(--image-frame-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-figure--hero img,
.article-figure--cover img {
  width: 100%;
  max-height: none;
  object-fit: cover;
  object-position: center;
  aspect-ratio: 3 / 2;
  border-radius: 0;
  box-shadow: none;
}

.article-figure--full {
  width: 100%;
  max-width: 100%;
  margin: 36px auto;
}

.article-figure--full img {
  width: 100%;
  max-width: 100%;
}

.article-figure--wide {
  width: 80%;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.article-figure--medium {
  width: 70%;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.article-figure--center {
  width: 100%;
  max-width: 100%;
}

.article-figure--inline {
  margin: 0;
  width: 100%;
  max-width: 100%;
}

.article-figure--inline img {
  margin: 0;
  width: 100%;
  max-height: 400px;
  object-fit: contain;
}

.article-media-row {
  display: grid;
  grid-template-columns: minmax(200px, 30%) 1fr;
  gap: 24px 36px;
  align-items: start;
  margin: 32px 0 40px;
  clear: both;
}

.article-media-row--stretch {
  align-items: stretch;
}

.article-media-row--stretch .article-media-row__media {
  display: flex;
  align-self: stretch;
}

.article-media-row__media .article-figure--fill-column {
  flex: 1;
  width: 100%;
  height: 100%;
  max-height: none;
  margin: 0;
  display: flex;
  align-items: stretch;
}

.article-media-row__media .article-figure--fill-column img {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: cover;
}

.article-media-row--right {
  grid-template-columns: 1fr minmax(200px, 30%);
}

.article-media-row--right .article-media-row__media {
  order: 2;
}

.article-media-row--right .article-media-row__body {
  order: 1;
}

.article-media-row__body > *:first-child {
  margin-top: 0;
}

.article-media-row__body > *:last-child {
  margin-bottom: 0;
}

.article-media-row__body p {
  margin-bottom: 1em;
}

.article-figure--left {
  float: left;
  width: auto;
  max-width: 42%;
  margin: 6px 28px 18px 0;
  text-align: left;
  clear: none;
}

.article-figure--right {
  float: right;
  width: auto;
  max-width: 42%;
  margin: 6px 0 18px 28px;
  text-align: right;
  clear: none;
}

.article-figure--left img,
.article-figure--right img {
  margin: 0;
}

.article-figure--portrait img {
  width: 100%;
  max-height: min(560px, 72vh);
  object-fit: contain;
}

.article-figure--illustration img {
  max-width: min(350px, 100%);
}

.article-figure-grid {
  display: grid;
  gap: 20px;
  margin: 32px 0;
  clear: both;
}

.article-figure-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.article-figure-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.article-figure-grid .article-figure {
  margin: 0;
  float: none;
  width: 100%;
  max-width: 100%;
}

.article-figure-grid .article-figure--grid-cell img {
  width: 100%;
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow-sm);
}

.article-related {
  max-width: 900px;
  margin: 58px auto 0;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
}

.article-related h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.article-related__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.article-related__card {
  display: block;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px;
  background: #fff;
  transition: transform .18s ease, box-shadow .18s ease;
}

.article-related__card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.article-related__category {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.article-related__card strong {
  display: block;
  line-height: 1.45;
  margin-bottom: 6px;
}

.article-related__card small {
  color: var(--color-text-light);
  line-height: 1.5;
}

.article-page__content::after {
  content: '';
  display: table;
  clear: both;
}

@media (max-width: 768px) {
  .article-page {
    padding: 36px 0 60px;
  }

  .article-page__header {
    margin-bottom: 28px;
    padding-bottom: 20px;
  }

  .article-page__content { font-size: 16px; }
  .article-page__desc { font-size: 16px; }

  .article-figure,
  .article-figure--wide,
  .article-figure--medium,
  .article-figure--left,
  .article-figure--right,
  .article-figure--full,
  .article-figure--hero {
    float: none;
    width: 100%;
    max-width: 100%;
    margin: 24px auto;
  }

  .article-figure--hero img,
  .article-figure--cover img {
    max-height: none;
  }

  .article-figure-grid--2,
  .article-figure-grid--3 {
    grid-template-columns: 1fr;
  }

  .article-figure img {
    width: 100%;
    max-width: 100%;
  }

  .article-media-row,
  .article-media-row--right {
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 28px 0;
  }

  .article-media-row--right .article-media-row__media,
  .article-media-row--right .article-media-row__body {
    order: unset;
  }

  .article-media-row__media .article-figure--inline img {
    max-height: none;
  }

  .article-related__grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .article-figure--wide {
    width: 88%;
  }

  .article-figure-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Library page */
.library-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 56px 0;
  text-align: center;
  color: var(--color-white);
}

.library-hero h1 {
  color: var(--color-white);
  text-transform: none;
  margin-bottom: 12px;
}

.library-hero p {
  color: rgba(255, 255, 255, 0.88);
  max-width: 600px;
  margin: 0 auto;
}

.library-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.library-search {
  flex: 1;
  min-width: 220px;
  max-width: 400px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 14px;
}

.library-filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--color-text);
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.library-section {
  padding: 48px 0 72px;
}

.library-section h2 {
  font-size: 1.35rem;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-primary);
  display: inline-block;
  text-transform: none;
}

.library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.library-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.library-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.library-card__cover {
  aspect-ratio: 3 / 2;
  background: var(--image-frame-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.library-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.library-card__cover--placeholder {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 600;
  padding: 16px;
  text-align: center;
}

.library-card__body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.library-card__category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  margin-bottom: 8px;
}

.library-card__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--color-heading);
}

.library-card__title a {
  color: inherit;
}

.library-card__title a:hover {
  color: var(--color-primary);
}

.library-card__desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 14px;
  flex: 1;
}

.library-card__meta {
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 10px;
}

.library-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.library-card__tag {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  color: var(--color-text-light);
}

.library-empty {
  text-align: center;
  padding: 48px;
  color: var(--color-text-light);
}

@media (max-width: 768px) {
  .library-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .library-search {
    max-width: 100%;
  }

  .library-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .library-card__cover img {
    max-width: none;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .library-hero {
    padding: 40px 0;
  }
}