/* ==========================================================================
   FLOWPOMODORO EDITORIAL ARTICLE DESIGN SYSTEM
   Premium Reading Experience & Product Ecosystem
   ========================================================================== */

/* ── Reading Progress Bar ────────────────────────────────────────────────── */
#reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--brand-primary);
  box-shadow: 0 0 8px var(--brand-glow);
  z-index: 2000;
  transition: width 0.1s ease-out;
}

/* ── Base Article Styles ─────────────────────────────────────────────────── */
body.editorial-theme {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.75;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Breadcrumb ──────────────────────────────────────────────────────────── */
.editorial-breadcrumb {
  max-width: 1040px;
  margin: 1.5rem auto 1rem auto;
  padding: 0 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.editorial-breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

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

.breadcrumb-separator {
  color: var(--text-muted);
  font-size: 0.75rem;
  opacity: 0.6;
}

.breadcrumb-current {
  color: var(--text-secondary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}

/* ── Article Header ──────────────────────────────────────────────────────── */
.editorial-header {
  max-width: 820px;
  margin: 2rem auto 2.5rem auto;
  padding: 0 1.5rem;
  text-align: left;
}

.article-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.article-category {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-primary);
}

.article-header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.action-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all var(--duration-fast);
}

.action-btn:hover {
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  transform: translateY(-1px);
}

.action-btn.bookmarked {
  color: var(--brand-primary);
  background: var(--brand-soft);
  border-color: var(--brand-primary);
}

html[data-theme="dark"] .action-btn.bookmarked {
  background: rgba(255, 184, 0, 0.15);
}

.article-h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem 0;
  font-family: var(--font-sans);
}

.article-intro {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.65;
  color: var(--text-secondary);
  margin: 0 0 1.75rem 0;
}

.author-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  color: #111827;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.author-details {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Hero Image ─────────────────────────────────────────────────────────── */
.article-hero-figure {
  max-width: 1040px;
  margin: 0 auto 3.5rem auto;
  padding: 0 1.5rem;
}

.article-hero-figure img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  display: block;
}

/* ── Editorial Reading Layout ────────────────────────────────────────────── */
.editorial-layout {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 4rem;
  align-items: start;
}

/* ── Sticky Table of Contents (Sidebar) ──────────────────────────────────── */
.layout-sidebar {
  position: sticky;
  top: 96px;
  padding-top: 0.5rem;
}

.editorial-toc {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-title {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-primary);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.toc-list li a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  line-height: 1.4;
  transition: color var(--duration-fast);
  padding: 0.2rem 0;
}

.toc-number {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand-primary);
  font-family: var(--font-sans);
  flex-shrink: 0;
}

.toc-text {
  flex: 1;
}

.toc-list li a:hover,
.toc-list li a.active {
  color: var(--brand-primary);
  font-weight: 600;
}

/* Mobile Collapsible TOC */
.mobile-toc-details {
  display: none;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
  padding: 1rem 1.25rem;
}

.mobile-toc-summary {
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  outline: none;
}

.mobile-toc-details[open] .mobile-toc-summary {
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

/* ── Main Article Body Content ───────────────────────────────────────────── */
.layout-content {
  min-width: 0;
}

.article-body {
  max-width: 720px;
  font-size: 1.125rem; /* ~18px */
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body p {
  margin: 0 0 1.75rem 0;
}

.article-body h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.95rem);
  font-weight: 800;
  color: var(--text-primary);
  margin: 3.25rem 0 1.25rem 0;
  line-height: 1.3;
  letter-spacing: -0.025em;
  scroll-margin-top: 100px;
}

.article-body h3 {
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  font-weight: 700;
  color: var(--text-primary);
  margin: 2.25rem 0 1rem 0;
  line-height: 1.35;
  scroll-margin-top: 100px;
}

.article-body a {
  color: var(--brand-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color var(--duration-fast);
}

.article-body a:hover {
  color: var(--brand-bright);
}

.article-body ul, 
.article-body ol {
  margin: 0 0 1.75rem 0;
  padding-left: 1.75rem;
}

.article-body li {
  margin-bottom: 0.65rem;
  line-height: 1.75;
}

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

/* Drop Cap */
.drop-cap::first-letter {
  font-size: 3.5rem;
  float: left;
  line-height: 0.85;
  margin-right: 0.65rem;
  margin-top: 0.15rem;
  font-weight: 800;
  color: var(--brand-primary);
  font-family: var(--font-sans);
}

/* ── Flow Tip / Callout Box ──────────────────────────────────────────────── */
.editorial-callout,
.key-takeaway,
.definition-box {
  background: var(--brand-soft);
  border-left: 4px solid var(--brand-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.5rem 1.75rem;
  margin: 2.25rem 0;
  color: #111827;
  position: relative;
}

html[data-theme="dark"] .editorial-callout,
html[data-theme="dark"] .key-takeaway,
html[data-theme="dark"] .definition-box {
  background: rgba(255, 184, 0, 0.08);
  border-left-color: var(--brand-primary);
  color: var(--text-primary);
  border-top: 1px solid rgba(255, 184, 0, 0.15);
  border-right: 1px solid rgba(255, 184, 0, 0.15);
  border-bottom: 1px solid rgba(255, 184, 0, 0.15);
}

.callout-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #926000;
  margin-bottom: 0.5rem;
}

html[data-theme="dark"] .callout-header {
  color: var(--brand-primary);
}

.editorial-callout p,
.key-takeaway p,
.definition-box p {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
}

/* ── Editorial Blockquote ────────────────────────────────────────────────── */
.editorial-quote {
  margin: 2.5rem 0;
  padding: 1.25rem 2rem;
  border-left: 4px solid var(--brand-primary);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--text-primary);
  background: var(--bg-surface);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.editorial-quote p {
  margin: 0;
}

/* ── Editorial Tables ────────────────────────────────────────────────────── */
.table-wrapper {
  overflow-x: auto;
  margin: 2.5rem 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
}

.editorial-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  text-align: left;
}

.editorial-table th {
  background: var(--bg-surface-hover);
  padding: 1rem 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
}

.editorial-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.editorial-table tr:last-child td {
  border-bottom: none;
}

/* ── Focus CTA Box (Embedded in Article) ─────────────────────────────────── */
.focus-cta {
  background: var(--bg-surface);
  border: 2px solid var(--brand-primary);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  text-align: center;
  margin: 3.5rem 0;
  box-shadow: 0 8px 32px var(--brand-glow);
  position: relative;
}

.focus-cta h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
}

.focus-cta p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0 0 1.5rem 0;
}

.timer-preview {
  display: inline-flex;
  align-items: center;
  gap: 1.25rem;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: monospace;
  margin-bottom: 1.5rem;
}

.timer-preview .control {
  cursor: pointer;
  color: var(--brand-primary);
  font-size: 1.4rem;
  user-select: none;
  transition: transform var(--duration-fast);
}

.timer-preview .control:hover {
  transform: scale(1.2);
}

.focus-cta .btn-focus,
.focus-cta .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--brand-primary);
  color: #111827;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.85rem 2.25rem;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: transform var(--duration-fast), background var(--duration-fast);
}

.focus-cta .btn-focus:hover,
.focus-cta .btn-primary:hover {
  background: var(--brand-bright);
  transform: translateY(-2px);
}

/* ── Bottom Components (Related, Prev/Next, Newsletter) ─────────────────── */
.bottom-components {
  max-width: 720px;
  margin-top: 4rem;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

/* Related Articles */
.related-articles {
  margin-bottom: 3.5rem;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brand-primary);
  margin-bottom: 0.5rem;
}

.related-articles h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 1.5rem 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.related-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: transform var(--duration-fast), border-color var(--duration-fast);
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--brand-primary);
}

.related-thumb {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.related-info {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.related-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
  margin: 0 0 0.5rem 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* Prev / Next Navigation */
.prev-next-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 3.5rem;
}

.pn-link {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: inherit;
  transition: all var(--duration-fast);
  display: flex;
  flex-direction: column;
}

.pn-link:hover {
  border-color: var(--brand-primary);
  transform: translateY(-2px);
}

.pn-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-primary);
  margin-bottom: 0.4rem;
}

.pn-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pn-link.next {
  text-align: right;
}

/* Editorial Newsletter */
.editorial-newsletter {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  text-align: center;
  margin-bottom: 3.5rem;
}

.editorial-newsletter h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 0.5rem 0;
}

.editorial-newsletter p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0 auto 1.5rem auto;
  max-width: 380px;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  max-width: 400px;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
}

.newsletter-form input:focus {
  border-color: var(--brand-primary);
}

.newsletter-form .btn-primary {
  padding: 0.75rem 1.5rem;
  font-size: 0.9rem;
}

/* ── Mobile Floating Action Bar (Like Mockup Screen 3) ───────────────────── */
.mobile-article-bar {
  display: none;
}

@media (max-width: 767px) {
  .mobile-article-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 68px;
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    gap: 1rem;
  }

  .mobile-like-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    padding: 0.55rem 1rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
  }

  .mobile-like-btn i {
    color: #ef4444;
  }

  .mobile-start-focus-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--brand-primary);
    color: #111827;
    font-weight: 800;
    font-size: 0.95rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    text-decoration: none;
  }

  body.editorial-theme {
    padding-bottom: 80px;
  }
}

/* ── Responsive Layout Rules ─────────────────────────────────────────────── */
@media (max-width: 960px) {
  .editorial-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .layout-sidebar {
    display: none;
  }

  .mobile-toc-details {
    display: block;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .prev-next-nav {
    grid-template-columns: 1fr;
  }

  .pn-link.next {
    text-align: left;
  }
}