.kd-main {
  max-width: var(--max-width-container, 1280px);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

@media (max-width: 640px) {
  .kd-main {
    padding-left: var(--space-4);
    padding-right: var(--space-4);
  }
}

/* Breadcrumb */
.kd-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-on-surface-variant);
  flex-wrap: wrap;
}

.kd-breadcrumb a {
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: color var(--transition-base);
}

.kd-breadcrumb a:hover {
  color: var(--color-primary);
}

.kd-breadcrumb .material-symbols-outlined {
  font-size: 14px;
}

.kd-breadcrumb-current {
  color: var(--color-primary);
  font-weight: 700;
}

/* Grid layout */
.kd-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 1024px) {
  .kd-grid {
    grid-template-columns: 1fr 320px;
  }
}

/* Card base */
.kd-card {
  background: var(--color-surface-container-lowest);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

/* Hero image */
.kd-hero {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 7;
  overflow: hidden;
}

.kd-hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kd-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(0, 0, 0, 0.6) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-6);
}

.kd-hero-tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  width: fit-content;
  margin-bottom: var(--space-2);
}

.kd-hero-title {
  font-family: var(--font-family);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0 0 var(--space-2);
  line-height: 1.2;
}

@media (max-width: 640px) {
  .kd-hero-title { font-size: 18px; }
}

.kd-hero-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.55;
  max-width: 640px;
}

/* Article content */
.kd-content {
  padding: var(--space-6);
}

.kd-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-surface-container-high);
  flex-wrap: wrap;
}

.kd-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  color: var(--color-on-surface);
}

.kd-meta-item .material-symbols-outlined {
  font-size: 16px;
  color: var(--color-primary);
}

.kd-prose p {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-on-surface-variant);
  margin: 0 0 var(--space-4);
}

.kd-prose h2 {
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 700;
  margin: var(--space-6) 0 var(--space-3);
}

.kd-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin: var(--space-5) 0;
}

@media (min-width: 640px) {
  .kd-info-grid { grid-template-columns: 1fr 1fr; }
}

.kd-info-box {
  background: var(--color-gray-50);
  padding: var(--space-5);
  border-radius: var(--radius-lg);
}

.kd-info-box.primary-accent {
  border-left-color: var(--color-primary);
}

.kd-info-box h3 {
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 var(--space-2);
}

.kd-info-box ul,
.kd-info-box ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kd-info-box li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
}

.kd-info-box li .material-symbols-outlined {
  font-size: 16px;
}

.kd-info-box ol {
  counter-reset: step;
}

.kd-info-box ol li {
  counter-increment: step;
}

.kd-info-box ol li::before {
  content: counter(step) ".";
  font-weight: 700;
  min-width: 16px;
}

/* Discussion section */
.kd-discussion {
  padding: var(--space-6);
}

.kd-discussion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.kd-discussion-title {
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-on-surface);
  margin: 0;
}

.kd-discussion-actions {
  display: flex;
  gap: var(--space-3);
}

.kd-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  background: none;
}

.kd-action-btn.like {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.kd-action-btn.like:hover {
  background: color-mix(in srgb, var(--color-primary) 8%, transparent);
}

.kd-action-btn.share {
  border: 2px solid var(--color-outline-variant);
  color: var(--color-on-surface-variant);
}

.kd-action-btn.share:hover {
  background: var(--color-surface-container);
}

.kd-action-btn .material-symbols-outlined { font-size: 16px; }

/* Comment box */
.kd-comments {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.kd-comment-box {
  display: flex;
  gap: var(--space-3);
}

.kd-avatar-circle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.kd-avatar-circle.primary {
  background: var(--color-primary-container);
  color: var(--color-on-primary-container);
}

.kd-avatar-circle.secondary {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}

.kd-comment-input {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.kd-textarea {
  width: 100%;
  min-height: 90px;
  padding: 10px 14px;
  border: 0.5px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: 13px;
  color: var(--color-on-surface);
  background: var(--color-gray-50);
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-base);
  box-sizing: border-box;
}

.kd-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 12%, transparent);
}

.kd-comment-submit {
  align-self: flex-end;
  padding: 8px 20px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
}

.kd-comment-submit:hover {
  background: var(--color-primary-container);
  transform: translateY(-1px);
}

/* Reply thread */
.kd-reply {
  display: flex;
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-surface-container-high);
}

.kd-reply-body {
  flex: 1;
}

.kd-reply-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.kd-reply-name {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-on-surface);
}

.kd-reply-time {
  font-size: 11px;
  color: var(--color-on-surface-variant);
}

.kd-reply-text {
  font-size: 13px;
  color: var(--color-on-surface-variant);
  line-height: 1.55;
  margin: 0;
}

.kd-reply-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: 6px;
}

.kd-reply-actions button {
  background: none;
  border: none;
  font-family: var(--font-family);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-base);
}

.kd-reply-actions .like-btn { color: var(--color-primary); }
.kd-reply-actions .reply-btn { color: var(--color-on-surface-variant); }
.kd-reply-actions .reply-btn:hover { color: var(--color-primary); }

/* ============================================
   SIDEBAR
   ============================================ */
.kd-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Author card */
.kd-author {
  text-align: center;
  padding: var(--space-6);
}

.kd-author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-3);
  display: block;
}

.kd-author-name {
  font-family: var(--font-family);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 2px;
}

.kd-author-role {
  font-size: 12px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--space-3);
}

.kd-author-bio {
  font-size: 12px;
  color: var(--color-on-surface-variant);
  line-height: 1.55;
  margin: 0 0 var(--space-4);
}

.kd-follow-btn {
  width: 100%;
  padding: 10px;
  border: 2px solid var(--color-primary);
  background: var(--color-surface-container);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
}

.kd-follow-btn:hover {
  background: var(--color-primary);
  color: var(--color-on-primary);
}

/* Stats card */
.kd-stats {
  padding: var(--space-5);
}

.kd-stats-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  margin: 0 0 var(--space-3);
}

.kd-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.kd-stat {
  background: var(--color-gray-50);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
}

.kd-stat .material-symbols-outlined {
  font-size: 20px;
  display: block;
  margin-bottom: 4px;
}

.kd-stat .material-symbols-outlined.views { color: var(--color-primary); }
.kd-stat .material-symbols-outlined.saved { color: var(--color-secondary); }

.kd-stat-value {
  font-family: var(--font-family);
  font-size: 20px;
  font-weight: 800;
  color: var(--color-on-surface);
}

.kd-stat-label {
  font-size: 11px;
  color: var(--color-on-surface-variant);
}

/* Related tips */
.kd-related {
  padding: var(--space-5);
}

.kd-related-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  margin: 0 0 var(--space-4);
}

.kd-related-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.kd-related-item {
  display: flex;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-base);
}

.kd-related-item:hover .kd-related-title {
  color: var(--color-primary);
}

.kd-related-thumb {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.kd-related-item:hover .kd-related-thumb {
  transform: scale(1.06);
}

.kd-related-title {
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0 0 2px;
  transition: color var(--transition-base);
}

.kd-related-read {
  font-size: 11px;
  color: var(--color-on-surface-variant);
}

.kd-related-more {
  width: 100%;
  margin-top: var(--space-4);
  padding: 8px;
  border: none;
  border-top: 1px solid var(--color-surface-container-high);
  background: transparent;
  color: var(--color-primary);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition-base);
}

.kd-related-more:hover {
  background: var(--color-surface-container-low);
}

/* CTA card */
.kd-promo {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
}

.kd-promo .material-symbols-outlined {
  font-size: 32px;
  margin-bottom: var(--space-3);
}

.kd-promo h3 {
  font-family: var(--font-family);
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 var(--space-2);
}

.kd-promo p {
  font-size: 12px;
  opacity: 0.9;
  line-height: 1.5;
  margin: 0 0 var(--space-4);
}

.kd-promo-btn {
  width: 100%;
  padding: 10px;
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
}

.kd-promo-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   RESPONSIVE
   ============================================ */

/* Tablet: 768px - 1023px */
@media (min-width: 768px) and (max-width: 1023px) {
  .kd-main {
    padding: var(--space-8) var(--space-5);
  }

  /* Single column — sidebar stacks below content */
  .kd-grid {
    grid-template-columns: 1fr;
  }

  /* Sidebar becomes horizontal row of cards */
  .kd-sidebar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
  }

  .kd-author {
    padding: var(--space-5);
  }

  .kd-hero-title {
    font-size: 22px;
  }

  .kd-discussion-actions {
    flex-wrap: wrap;
    gap: var(--space-2);
  }
}

/* Mobile: 480px - 767px */
@media (max-width: 767px) {
  .kd-main {
    padding: var(--space-5) var(--space-4);
    gap: var(--space-4);
  }

  /* Breadcrumb: truncate long paths */
  .kd-breadcrumb {
    font-size: 11px;
  }

  .kd-breadcrumb-current {
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Hero */
  .kd-hero {
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-xl);
  }

  .kd-hero-overlay {
    padding: var(--space-4);
  }

  .kd-hero-title {
    font-size: 18px;
  }

  .kd-hero-desc {
    display: none; /* Too cluttered on small screens */
  }

  /* Content */
  .kd-content {
    padding: var(--space-4);
  }

  .kd-meta {
    gap: var(--space-3);
  }

  .kd-meta-item {
    font-size: 11px;
  }

  /* Discussion */
  .kd-discussion {
    padding: var(--space-4);
  }

  .kd-discussion-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .kd-discussion-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .kd-action-btn {
    padding: 7px 14px;
    font-size: 11px;
  }

  /* Comment box */
  .kd-comment-box {
    gap: var(--space-2);
  }

  .kd-avatar-circle {
    width: 30px;
    height: 30px;
    font-size: 12px;
  }

  .kd-textarea {
    min-height: 80px;
    font-size: 14px; /* Prevents iOS zoom */
  }

  /* Sidebar */
  .kd-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
  }

  .kd-author {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-4);
    text-align: left;
    padding: var(--space-4);
  }

  .kd-author-avatar {
    width: 60px;
    height: 60px;
    margin: 0;
    flex-shrink: 0;
  }

  .kd-follow-btn {
    width: auto;
    padding: 8px 16px;
  }

  .kd-stats {
    padding: var(--space-4);
  }

  .kd-related {
    padding: var(--space-4);
  }

  .kd-related-thumb {
    width: 56px;
    height: 56px;
  }

  /* Info grid */
  .kd-info-grid {
    grid-template-columns: 1fr;
  }
}

/* Small Mobile: < 480px */
@media (max-width: 479px) {
  .kd-main {
    padding: var(--space-4) var(--space-3);
  }

  .kd-hero {
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
  }

  .kd-hero-title {
    font-size: 16px;
  }

  .kd-content {
    padding: var(--space-3);
  }

  .kd-discussion {
    padding: var(--space-3);
  }

  .kd-prose p {
    font-size: 13px;
  }

  .kd-prose h2 {
    font-size: 15px;
  }

  .kd-author {
    flex-direction: column;
    text-align: center;
    padding: var(--space-4);
  }

  .kd-author-avatar {
    margin: 0 auto var(--space-2);
  }

  .kd-follow-btn {
    width: 100%;
  }

  .kd-stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .kd-related-thumb {
    width: 48px;
    height: 48px;
  }

  .kd-related-title {
    font-size: 11px;
  }

  .kd-reply {
    gap: var(--space-2);
  }

  .kd-breadcrumb {
    display: none;
  }
}