/* ============================================================
   articles.css - Cam nang article templates
   ============================================================ */

.article-shell {
  background:
    radial-gradient(circle at 12% 8%, rgba(108, 92, 231, 0.1), transparent 28rem),
    radial-gradient(circle at 88% 14%, rgba(253, 121, 168, 0.08), transparent 24rem),
    var(--color-bg-soft);
}

.article-hero {
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem);
}

.article-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.7fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.article-kicker {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-bottom: var(--space-4);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.article-title {
  max-width: 760px;
  margin-bottom: var(--space-5);
  font-size: clamp(2.25rem, 5vw, 4.75rem);
  line-height: 1.18;
  letter-spacing: 0;
}

.article-lead {
  max-width: 680px;
  color: var(--color-text-body);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.7;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: var(--space-6);
  color: var(--color-text-muted);
  font-weight: 600;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 254, 250, 0.78);
  box-shadow: var(--shadow-sm);
}

.article-hero__media {
  overflow: hidden;
  border-radius: var(--radius-2xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-lg);
}

.article-hero__media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(260px, 320px);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  padding-bottom: var(--section-padding);
}

.article-body {
  padding: clamp(1.35rem, 4vw, 2.5rem);
  border-radius: var(--radius-2xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-md);
}

.article-body > * + * {
  margin-top: var(--space-6);
}

.article-body h2 {
  padding-top: 0.2rem;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.35;
}

.article-body h3 {
  padding-top: 0.15rem;
  font-size: clamp(1.2rem, 2vw, 1.45rem);
}

.article-body p,
.article-body li {
  font-size: 1.08rem;
  line-height: 1.78;
}

.article-body ul,
.article-body ol {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.25rem;
}

.article-answer {
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid rgba(108, 92, 231, 0.16);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-bg));
}

.article-answer strong {
  color: var(--color-primary-dark);
}

.article-table {
  overflow: hidden;
  border: 1px solid rgba(108, 92, 231, 0.14);
  border-radius: var(--radius-xl);
  background: var(--color-bg);
}

.article-table table {
  width: 100%;
  border-collapse: collapse;
}

.article-table th,
.article-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(108, 92, 231, 0.1);
  vertical-align: top;
}

.article-table th {
  color: var(--color-text-primary);
  background: var(--color-primary-light);
  font-weight: 700;
}

.article-table tr:last-child td {
  border-bottom: 0;
}

.article-callout {
  padding: clamp(1rem, 3vw, 1.5rem);
  border-radius: var(--radius-xl);
  background: var(--color-bg-alt);
}

.article-faq details {
  border-top: 1px solid rgba(108, 92, 231, 0.14);
  padding: 1rem 0;
}

.article-faq details:last-child {
  border-bottom: 1px solid rgba(108, 92, 231, 0.14);
}

.article-faq summary {
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.45;
}

.article-faq p {
  margin-top: 0.75rem;
}

.article-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
  display: grid;
  gap: var(--space-4);
  max-height: calc(100vh - var(--nav-height) - 3rem);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding-right: 0.35rem;
  scrollbar-width: thin;
  scrollbar-color: rgba(108, 92, 231, 0.35) transparent;
}

.article-sidebar::-webkit-scrollbar {
  width: 6px;
}

.article-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.article-sidebar::-webkit-scrollbar-thumb {
  background: rgba(108, 92, 231, 0.28);
  border-radius: var(--radius-pill);
}

.article-sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(108, 92, 231, 0.45);
}

.article-card {
  padding: 1.25rem;
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
}

.article-card h2,
.article-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
}

.article-card ul {
  display: grid;
  gap: 0.55rem;
  padding-left: 1.1rem;
}

.article-card a {
  font-weight: 700;
}

.article-cta {
  display: grid;
  gap: var(--space-4);
  padding: clamp(1.25rem, 4vw, 2rem);
  border-radius: var(--radius-2xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-bg);
  box-shadow: var(--shadow-lg);
}

.article-cta h2,
.article-cta p {
  color: inherit;
}

.article-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  padding-bottom: var(--section-padding);
}

.guide-card {
  display: grid;
  gap: var(--space-4);
  min-height: 100%;
  padding: 1.4rem;
  border-radius: var(--radius-xl);
  background: var(--color-bg);
  box-shadow: var(--shadow-md);
  color: inherit;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  border: 1px solid rgba(108, 92, 231, 0.1);
  transition:
    transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.35s ease;
}

.guide-card--link:hover,
.guide-card--link:focus-visible {
  transform: translateY(-8px);
  border-color: rgba(108, 92, 231, 0.24);
  box-shadow: 0 22px 48px rgba(75, 26, 173, 0.16);
}

.guide-card--link h2 {
  transition: color 0.25s ease;
}

.guide-card--link:hover h2,
.guide-card--link:focus-visible h2 {
  color: var(--color-primary-dark);
}

.guide-card__read-tag {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-heading);
  font-size: var(--font-size-sm);
  font-weight: 800;
  opacity: 0;
  transform: translateX(calc(100% + 1.2rem));
  transition:
    opacity 0.3s ease,
    transform 0.38s cubic-bezier(0.16, 1, 0.3, 1);
}

.guide-card--link:hover .guide-card__read-tag,
.guide-card--link:focus-visible .guide-card__read-tag {
  opacity: 1;
  transform: translateX(0);
}

.guide-card__meta {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.guide-card h2 {
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

@media (max-width: 900px) {
  .article-hero__grid,
  .article-layout,
  .guide-grid {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
    max-height: none;
    overflow: visible;
    padding-right: 0;
  }
}

@media (max-width: 560px) {
  .article-hero {
    padding-top: 2rem;
  }

  .article-title {
    font-size: clamp(2rem, 11vw, 3.15rem);
  }

  .article-meta {
    gap: 0.5rem;
  }

  .article-body,
  .article-card,
  .guide-card {
    border-radius: var(--radius-xl);
  }

  .article-table {
    overflow-x: auto;
  }

  .article-table table {
    min-width: 560px;
  }

  .article-cta__actions .btn {
    width: 100%;
  }
}