/* ---------- danh sách bài ---------- */

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin: 22px 0 28px;
}
.blog-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-soft);
}
.blog-tag:hover,
.blog-tag.active {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary-deep);
}
.blog-tag-count {
  font-size: 0.8rem;
  opacity: 0.7;
}

.blog-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1000px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-card {
  padding: 0;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
/* Cả thẻ là một link: vùng bấm rộng bằng cả ô, dễ trúng trên điện thoại */
.blog-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}
.blog-card-cover {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}
.blog-card-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.blog-card-title {
  font-family: var(--font-head);
  font-size: 1.14rem;
  line-height: 1.35;
  margin: 0;
}
/* Cắt gọn 3 dòng để các ô trong lưới cao bằng nhau dù bài dài ngắn khác nhau */
.blog-card-excerpt {
  margin: 0;
  font-size: 0.94rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-meta {
  margin: auto 0 0;
  font-size: 0.85rem;
}

.blog-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 30px;
}

/* ---------- trang bài viết ---------- */

.blog-narrow {
  max-width: 760px;
}
.blog-post-head h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  margin: 0 0 8px;
}
@media (min-width: 720px) {
  .blog-post-head h1 {
    font-size: 2.4rem;
  }
}
.blog-post-cover {
  width: 100%;
  height: auto;
  aspect-ratio: 40 / 21;
  object-fit: cover;
  border-radius: var(--radius);
  margin: 20px 0 26px;
}

/* Chiều rộng dòng ~70 ký tự và giãn dòng rộng: bài dài đọc trên điện thoại mà
   không mỏi mắt, cũng là thứ Google chấm trong phần trải nghiệm trang. */
.blog-content {
  font-size: 1.06rem;
  line-height: 1.8;
}
.blog-content > * + * {
  margin-top: 1.1em;
}
.blog-content h2 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  margin-top: 1.8em;
  line-height: 1.3;
}
.blog-content h3 {
  font-family: var(--font-head);
  font-size: 1.22rem;
  margin-top: 1.5em;
}
.blog-content ul,
.blog-content ol {
  padding-left: 1.4em;
}
.blog-content li + li {
  margin-top: 0.4em;
}
.blog-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}
.blog-content a {
  color: var(--primary-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.blog-content blockquote {
  margin-left: 0;
  padding: 4px 0 4px 18px;
  border-left: 4px solid var(--primary-soft);
  color: var(--ink-soft);
  font-style: italic;
}
.blog-content code {
  background: var(--bg-soft);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.92em;
}
.blog-content pre {
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  overflow-x: auto;
}
.blog-content pre code {
  background: none;
  padding: 0;
}
.blog-content table {
  width: 100%;
  border-collapse: collapse;
}
.blog-content th,
.blog-content td {
  border: 1px solid var(--line);
  padding: 8px 10px;
  text-align: left;
}

.blog-post-tags {
  justify-content: flex-start;
  margin: 32px 0 0;
}
.blog-cta {
  margin: 36px 0 0;
  padding: 26px 22px;
}
.blog-cta h2 {
  font-family: var(--font-head);
  font-size: 1.32rem;
  margin: 0 0 6px;
}
.blog-cta .btn {
  margin-top: 14px;
}
.blog-related {
  margin-top: 40px;
}
.blog-related .blog-grid {
  grid-template-columns: 1fr;
}
@media (min-width: 720px) {
  .blog-related .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- form soạn bài trong khu quản trị ---------- */

.post-form {
  display: grid;
  gap: 18px;
  padding: 24px 22px;
}
.post-editor {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95rem;
  line-height: 1.65;
  resize: vertical;
  min-height: 320px;
}
.slug-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
.slug-row .input {
  flex: 1;
}
.cover-preview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}
.cover-preview img {
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.cover-remove {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}
.post-form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}
.admin-row-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}