/* ================================================================
   PlayerSDK — Blog Detail Page Styles
   blog-detail.css
   ================================================================ */

/* ── Variables & Base ── */
.bd-container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Hero Section ── */
.bd-hero {
  position: relative;
  padding: 130px 0 48px;
  overflow: hidden;
}

.bd-hero__bg-glow {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 420px;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.18) 0%, transparent 72%);
  pointer-events: none;
}

/* ── Breadcrumb ── */
.bd-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.bd-breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.bd-breadcrumb a:hover { color: var(--accent); }
.bd-breadcrumb i { font-size: 0.7rem; opacity: 0.5; }
.bd-breadcrumb span { color: var(--text-primary); font-weight: 500; }

/* ── Badge + read time ── */
.bd-hero__badge-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.bd-hero__badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: 100px;
  background: linear-gradient(135deg, rgba(99,102,241,0.22), rgba(139,92,246,0.22));
  border: 1px solid rgba(139,92,246,0.3);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #a78bfa;
  font-family: var(--font-display);
}
.bd-hero__read-time {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ── Title ── */
.bd-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 16px;
  max-width: 820px;
}

.bd-hero__subtitle {
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 0 32px;
}

/* ── Author row ── */
.bd-hero__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.bd-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.bd-author__avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
  letter-spacing: 0.05em;
}
.bd-author__name {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}
.bd-author__date {
  display: block;
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.bd-hero__actions {
  display: flex;
  align-items: center;
  gap: 8px;
}
.bd-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}
.bd-action-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(99,102,241,0.08);
}

/* ── Cover Image ── */
.bd-cover-wrap {
  margin-top: 40px;
  margin-bottom: 0;
}
.bd-cover {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16/6;
  background: var(--bg-secondary);
}
.bd-cover__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.bd-cover__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.35));
}

/* ── Main Layout ── */
.bd-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  margin-top: 56px;
  align-items: start;
}

/* ── Sidebar ── */
.bd-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.bd-toc-card {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(16px);
}
.bd-toc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-display);
}
.bd-toc-nav {
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
}
.bd-toc-link {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.83rem;
  line-height: 1.4;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}
.bd-toc-link:hover,
.bd-toc-link.active {
  background: rgba(99,102,241,0.1);
  color: var(--accent);
}
.bd-toc-link.is-h3 {
  padding-left: 22px;
  font-size: 0.78rem;
}

/* Share card */
.bd-share-card {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 18px;
  backdrop-filter: blur(16px);
}
.bd-share-card__label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin: 0 0 12px;
  font-family: var(--font-display);
}
.bd-share-card__btns {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.bd-share-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  width: 100%;
}
.bd-share-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(99,102,241,0.08);
}

/* ── Article Content ── */
.bd-content {
  position: relative;
  min-width: 0;
}

/* Reading progress bar */
.bd-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899);
  width: 0%;
  z-index: 9999;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

.bd-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 0;
  gap: 16px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.bd-loading__spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: bdSpin 0.8s linear infinite;
}
@keyframes bdSpin {
  to { transform: rotate(360deg); }
}

/* ── Article Typography ── */
.bd-article {
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.bd-article h2 {
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 2.4em 0 0.7em;
  padding-top: 0.5em;
  border-top: 1px solid var(--border-color);
  scroll-margin-top: 100px;
}

.bd-article h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.8em 0 0.5em;
  scroll-margin-top: 100px;
}

.bd-article p {
  margin: 0 0 1.3em;
  color: var(--text-secondary);
}

.bd-article strong {
  color: var(--text-primary);
  font-weight: 700;
}

.bd-article ul,
.bd-article ol {
  margin: 0 0 1.3em 1.2em;
  padding: 0;
  color: var(--text-secondary);
}

.bd-article li {
  margin-bottom: 0.5em;
  line-height: 1.7;
}

/* Callout / Tip boxes */
.bd-callout {
  display: flex;
  gap: 14px;
  padding: 18px 20px;
  border-radius: 12px;
  margin: 1.8em 0;
  border-left: 3px solid;
}
.bd-callout--tip {
  background: rgba(99,102,241,0.08);
  border-color: #6366f1;
}
.bd-callout--warning {
  background: rgba(245,158,11,0.08);
  border-color: #f59e0b;
}
.bd-callout--success {
  background: rgba(16,185,129,0.08);
  border-color: #10b981;
}
.bd-callout__icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: 1px;
}
.bd-callout--tip .bd-callout__icon { color: #6366f1; }
.bd-callout--warning .bd-callout__icon { color: #f59e0b; }
.bd-callout--success .bd-callout__icon { color: #10b981; }
.bd-callout__body {
  font-size: 0.93rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.bd-callout__body strong { color: var(--text-primary); }

/* Step list */
.bd-steps {
  list-style: none;
  margin: 0 0 1.6em;
  padding: 0;
  counter-reset: bdStep;
}
.bd-steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  counter-increment: bdStep;
}
.bd-steps li:last-child { border-bottom: none; }
.bd-steps li::before {
  content: counter(bdStep);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  font-family: var(--font-display);
}

/* Code block */
.bd-code {
  background: #0e121a;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px 20px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: #a5f3fc;
  overflow-x: auto;
  margin: 1.4em 0;
}

/* Comparison table */
.bd-table-wrap {
  overflow-x: auto;
  margin: 1.6em 0;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}
.bd-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.bd-table th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
  font-family: var(--font-display);
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.bd-table td {
  padding: 12px 16px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
}
.bd-table tr:last-child td { border-bottom: none; }
.bd-table tr:hover td { background: rgba(99,102,241,0.04); }

/* Tags row */
.bd-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}
.bd-tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}
.bd-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(99,102,241,0.07);
}

/* ── Author Bio ── */
.bd-author-bio {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-top: 40px;
  padding: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  backdrop-filter: blur(16px);
}
.bd-author-bio__avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.bd-author-bio__name {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.bd-author-bio__desc {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0;
}

/* ── Related Articles ── */
.bd-related {
  margin-top: 80px;
  padding: 64px 0;
  border-top: 1px solid var(--border-color);
}
.bd-related__header {
  margin-bottom: 36px;
}
.bd-section-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 16px;
  border-radius: 100px;
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.25);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #a78bfa;
  margin-bottom: 12px;
  font-family: var(--font-display);
}
.bd-related__title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0;
}
.bd-related__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.bd-rel-card {
  background: var(--glass-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.28s cubic-bezier(0.16,1,0.3,1);
  cursor: pointer;
  text-decoration: none;
  display: block;
}
.bd-rel-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 16px 48px rgba(99,102,241,0.18);
}
.bd-rel-card__img-wrap {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
  background: var(--bg-secondary);
}
.bd-rel-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.bd-rel-card:hover .bd-rel-card__img { transform: scale(1.05); }
.bd-rel-card__badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}
.bd-rel-card__body {
  padding: 18px;
}
.bd-rel-card__cat {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-family: var(--font-display);
}
.bd-rel-card__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 6px 0 8px;
  line-height: 1.4;
}
.bd-rel-card__meta {
  font-size: 0.77rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Newsletter CTA ── */
.bd-newsletter {
  padding: 0 0 64px;
}
.bd-newsletter__card {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 36px 40px;
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(139,92,246,0.08));
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  flex-wrap: wrap;
}
.bd-newsletter__icon {
  font-size: 2.4rem;
  color: #a78bfa;
  flex-shrink: 0;
}
.bd-newsletter__copy { flex: 1; min-width: 200px; }
.bd-newsletter__copy h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 6px;
}
.bd-newsletter__copy p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0;
}
.bd-newsletter__form {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.bd-newsletter__input {
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.88rem;
  width: 220px;
  outline: none;
  transition: border-color 0.2s;
}
.bd-newsletter__input:focus { border-color: var(--accent); }
.bd-newsletter__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}
.bd-newsletter__btn:hover {
  background: var(--accent-hover, #4f46e5);
  transform: translateY(-1px);
}

/* ── Back to Blog ── */
.bd-back-wrap {
  padding: 0 0 80px;
}
.bd-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s;
}
.bd-back-btn:hover { color: var(--accent); }

/* ── Responsive ── */
@media (max-width: 1023px) {
  .bd-layout {
    grid-template-columns: 1fr;
  }
  .bd-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}
@media (max-width: 767px) {
  .bd-hero { padding: 110px 0 36px; }
  .bd-hero__title { font-size: 1.8rem; }
  .bd-hero__actions { display: none; }
  .bd-sidebar { grid-template-columns: 1fr; }
  .bd-related__grid { grid-template-columns: 1fr; }
  .bd-newsletter__card { flex-direction: column; text-align: center; }
  .bd-newsletter__form { width: 100%; flex-direction: column; }
  .bd-newsletter__input { width: 100%; }
  .bd-cover { aspect-ratio: 16/7; }
}