/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding-top: 7rem;
  padding-bottom: 8rem;
}

.hero-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 600;
  line-height: 1.13;
  letter-spacing: -0.025em;
  color: var(--color-text);
  max-width: 25ch;
  margin-bottom: 1.75rem;
}

.hero-subtext-wrap {
  max-width: 62ch;
  margin-bottom: 2.5rem;
}

.hero-subtext {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.hero-subtext--sharp {
  color: var(--color-text);
  font-weight: 400;
  margin-top: 0.75rem;
  max-width: 52ch;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

/* ============================================================
   Pillars
   ============================================================ */
.pillars {
  padding-block: 5.5rem;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pillars-intro {
  margin-bottom: 3.5rem;
  max-width: 60ch;
}

.pillars-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.pillars-body {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.pillar-card {
  background-color: var(--color-bg);
  padding: 2.25rem 2rem;
  border: 1px solid var(--color-border);
  transition: background-color 0.15s;
}

.pillar-card:hover {
  background-color: #f7f7f7;
}

.pillar-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.pillar-text {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ============================================================
   Featured Writing
   ============================================================ */
.writing {
  padding-block: 6.25rem;
}

.writing-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-border);
}

.article-card {
  transition: background-color 0.15s;
}

.article-card:hover {
  background-color: var(--color-surface);
}

.article-card--featured {
  padding: 2.75rem;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  background-color: #fcfcfc;
}

.article-cards-secondary {
  display: flex;
  flex-direction: column;
}

.article-card--small {
  flex: 1;
  padding: 2.25rem 2.5rem;
  display: flex;
  flex-direction: column;
}

.article-card--small:first-child {
  border-bottom: 1px solid var(--color-border);
}

.article-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border: none;
  padding: 0;
  border-radius: 0;
  margin-bottom: 1.125rem;
  background: none;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 0.875rem;
  flex-grow: 0;
}

.article-card--featured .article-title {
  font-size: clamp(1.375rem, 2vw, 1.75rem);
  margin-bottom: 1.25rem;
}

.article-summary {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 2rem;
}

.article-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border-bottom: 1px solid var(--color-text);
  padding-bottom: 1px;
  transition: opacity 0.15s;
  align-self: flex-start;
  margin-top: auto;
}

.article-link:hover {
  opacity: 0.55;
}

/* ============================================================
   Systems
   ============================================================ */
.systems {
  padding-block: 6.5rem;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--color-border);
}

.project-card {
  background-color: var(--color-bg);
  padding: 2.25rem 2rem;
  border-right: 1px solid var(--color-border);
  transition: background-color 0.15s;
  display: flex;
  flex-direction: column;
}

.project-card:last-child {
  border-right: none;
}

.project-card:hover {
  background-color: #f7f7f7;
}

.project-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.project-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  flex-grow: 1;
  margin-bottom: 1.75rem;
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.meta-sep {
  color: var(--color-border);
}

/* ============================================================
   About
   ============================================================ */
.about {
  padding-block: 6.25rem;
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 5rem;
  align-items: start;
}

.about-body p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.about-body .btn {
  margin-top: 0.5rem;
}

.about-belief {
  color: var(--color-text) !important;
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.5rem) !important;
  line-height: 1.45 !important;
  margin-block: 1.75rem;
}

/* ============================================================
   Contact CTA
   ============================================================ */
.contact {
  padding-block: 6rem;
  background-color: var(--color-text);
  color: var(--color-bg);
}

.contact-inner {
  max-width: 52ch;
}

.contact-heading {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 600;
  color: var(--color-bg);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1.75rem;
}

.contact-subtext {
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 1.125rem;
}

.contact-list {
  margin-bottom: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.contact-list li {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  padding-left: 1.5rem;
  position: relative;
}

.contact-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: rgba(255, 255, 255, 0.3);
}

.contact .btn-primary {
  background-color: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-bg);
  padding: 0.75rem 1.6rem;
}

.contact .btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.85);
}

/* ============================================================
   Responsive — page sections
   ============================================================ */
@media (max-width: 900px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  /* Reset per-section padding to unified mobile rhythm */
  .pillars,
  .writing,
  .systems,
  .about,
  .contact {
    padding-block: var(--section-py);
  }

  /* Hero */
  .hero {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }

  /* Pillars */
  .pillars-grid {
    grid-template-columns: 1fr;
  }

  .pillar-card {
    border-right: 1px solid var(--color-border);
    border-bottom: none;
  }

  .pillar-card:last-child {
    border-bottom: 1px solid var(--color-border);
  }

  /* Writing */
  .writing-grid {
    grid-template-columns: 1fr;
  }

  .article-card--featured {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  /* Systems */
  .systems-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .project-card:last-child {
    border-bottom: none;
  }
}

@media (max-width: 480px) {
  .hero-ctas {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============================================================
   Contact Page
   ============================================================ */
.contact-page-hero {
  padding-top: 5rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--color-text);
  max-width: 22ch;
  margin-bottom: 1.25rem;
}

.page-intro {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.75;
}

.contact-page-content {
  padding-block: 5rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 5rem;
  align-items: start;
}

.contact-form-panel {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
}

.contact-context-panel {
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.contact-context-panel h2 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.contact-context-panel ul {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-bottom: 2rem;
}

.contact-context-panel li {
  font-size: 0.9375rem;
  color: var(--color-text);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.55;
}

.contact-context-panel li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

.contact-note {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  border-top: 1px solid var(--color-border);
  padding-top: 1.25rem;
}

/* Contact page responsive */
@media (max-width: 900px) {
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .contact-page-hero {
    padding-top: 3.5rem;
    padding-bottom: 3rem;
  }

  .contact-page-content {
    padding-block: 3.5rem;
  }

  .contact-form-panel {
    padding: 1.75rem;
  }
}

/* ============================================================
   About Page
   ============================================================ */

/* Hero */
.ap-hero {
  padding-top: 5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--color-border);
}

.ap-hero-heading {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 600;
  line-height: 1.13;
  letter-spacing: -0.025em;
  color: var(--color-text);
  max-width: 28ch;
  margin-bottom: 1.75rem;
}

.ap-hero-sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 58ch;
  line-height: 1.75;
}

/* Professional Foundation */
.ap-foundation {
  padding-block: 5.5rem;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.ap-foundation-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 5rem;
  align-items: start;
}

.ap-foundation-body .section-title {
  margin-bottom: 1.25rem;
}

.ap-foundation-body p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

.ap-foundation-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  padding-top: 0.5rem;
}

.ap-foundation-list li {
  font-size: 0.9375rem;
  color: var(--color-text);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.55;
}

.ap-foundation-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-text-muted);
}

/* Current Direction */
.ap-direction {
  padding-block: 5.5rem;
  border-bottom: 1px solid var(--color-border);
}

.ap-direction-inner {
  max-width: 58ch;
}

.ap-direction-inner .section-title {
  margin-bottom: 1.25rem;
}

.ap-direction-inner p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.ap-direction-lead {
  color: var(--color-text);
  margin-bottom: 0.875rem !important;
}

.ap-direction-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.ap-direction-list li {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.55;
}

.ap-direction-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-border);
}

/* Point of View */
.ap-pov {
  padding-block: 5.5rem;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.ap-pov-inner {
  max-width: 54ch;
}

.ap-pov-inner .section-title {
  margin-bottom: 2rem;
}

.ap-pov-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.25vw, 1.625rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-bottom: 1.75rem;
}

.ap-pov-body {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* How I Think */
.ap-thinking {
  padding-block: 5.5rem;
  border-bottom: 1px solid var(--color-border);
}

.ap-thinking-heading {
  margin-bottom: 2.5rem;
}

.ap-thinking-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-border);
}

.ap-thought-card {
  padding: 2.25rem 2rem;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.ap-thought-card:nth-child(2n) {
  border-right: none;
}

.ap-thought-card:nth-last-child(-n+2) {
  border-bottom: none;
}

.ap-thought-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.ap-thought-body {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* What This Site Is */
.ap-site-story {
  padding-block: 5.5rem;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.ap-site-story-inner {
  max-width: 58ch;
}

.ap-site-story-inner .section-title {
  margin-bottom: 1.5rem;
}

.ap-site-story-inner p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.ap-site-story-inner p:last-child {
  margin-bottom: 0;
}

/* CTA */
.ap-cta {
  padding-block: 6rem;
}

.ap-cta-inner .section-title {
  margin-bottom: 2rem;
}

.ap-cta-btns {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.ap-cta-note {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.ap-cta-note a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: border-color 0.15s;
}

.ap-cta-note a:hover {
  border-color: var(--color-text);
}

/* About page responsive */
@media (max-width: 900px) {
  .ap-foundation-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .ap-hero {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }

  .ap-thinking-grid .ap-thought-card {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .ap-thinking-grid .ap-thought-card:last-child {
    border-bottom: none;
  }

  .ap-thinking-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .ap-cta-btns {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============================================================
   Writing Page
   ============================================================ */

/* Hero */
.wp-hero {
  padding-top: 5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--color-border);
}

.wp-hero-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--color-text);
  max-width: 32ch;
  margin-bottom: 1.5rem;
}

.wp-hero-sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.75;
}

/* Featured Writing */
.wp-featured {
  padding-block: 5.5rem;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

/* Thematic Sections */
.wp-themes {
  padding-top: 5rem;
  padding-bottom: 6rem;
}

.wp-theme {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: start;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
  margin-bottom: 3.5rem;
}

.wp-theme:last-child {
  margin-bottom: 0;
}

.wp-theme-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.wp-theme-desc {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.wp-theme-articles {
  display: flex;
  flex-direction: column;
}

.wp-article-item {
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.15s;
}

.wp-article-item:first-child {
  border-top: 1px solid var(--color-border);
}

.wp-article-item:hover {
  background-color: var(--color-surface);
}

.wp-article-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  padding-block: 1.125rem;
}

.wp-article-row-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.45;
}

.wp-article-row-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.wp-article-placeholder {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  padding-block: 1.125rem;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-style: italic;
  opacity: 0.65;
}

/* Writing page responsive */
@media (max-width: 900px) {
  .wp-theme {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

@media (max-width: 768px) {
  .wp-hero {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }

  .wp-themes {
    padding-top: 3.5rem;
    padding-bottom: 4.5rem;
  }
}

@media (max-width: 480px) {
  .wp-article-row {
    flex-direction: column;
    gap: 0.3rem;
  }
}

/* ============================================================
   Systems Page
   ============================================================ */

.sp-hero {
  padding-top: 5rem;
  padding-bottom: 5.5rem;
  border-bottom: 1px solid var(--color-border);
}

.sp-hero-heading {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--color-text);
  max-width: 34ch;
  margin-bottom: 1.5rem;
}

.sp-hero-sub {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.75;
}

.sp-intro {
  padding-top: 4rem;
  padding-bottom: 4rem;
  border-bottom: 1px solid var(--color-border);
}

.sp-intro-text {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.75;
  color: var(--color-text);
  max-width: 52ch;
}

.sp-systems {
  padding-top: 5rem;
  padding-bottom: 6rem;
}

.system-card {
  display: block;
  text-decoration: none;
  padding-top: 3rem;
  border-top: 1px solid var(--color-border);
  margin-bottom: 0;
  transition: background-color 0.15s;
}

.system-card:last-child {
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 3rem;
}

.system-card:hover {
  background-color: var(--color-surface);
}

.system-card:hover .system-title {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.system-card-inner {
  max-width: 640px;
  padding-bottom: 3rem;
}

.system-card:last-child .system-card-inner {
  padding-bottom: 0;
}

.system-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.system-desc {
  font-size: 1.0625rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 0.625rem;
}

.system-context {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.system-meta {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  opacity: 0.7;
}

@media (max-width: 768px) {
  .sp-hero {
    padding-top: 3.5rem;
    padding-bottom: 4rem;
  }

  .sp-intro {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }

  .sp-systems {
    padding-top: 3.5rem;
    padding-bottom: 4.5rem;
  }

  .system-card {
    padding-top: 2.5rem;
  }

  .system-card:last-child {
    padding-bottom: 2.5rem;
  }

  .system-card-inner {
    padding-bottom: 2.5rem;
  }
}

/* ============================================================
   Article Detail Page
   ============================================================ */

.article-reading-col {
  max-width: 720px;
  margin-inline: auto;
}

/* Header */
.article-page-header {
  padding-top: 4rem;
  padding-bottom: 4.5rem;
  border-bottom: 1px solid var(--color-border);
}

.article-back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  transition: color 0.15s;
}

.article-back-link:hover {
  color: var(--color-text);
}

.article-page-header .article-tag {
  margin-bottom: 1.5rem;
}

.article-page-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.13;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.article-page-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Body */
.article-body-section {
  padding-block: 4.5rem;
  border-bottom: 1px solid var(--color-border);
}

.article-body h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--color-text);
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body p {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.article-body p:last-child {
  margin-bottom: 0;
}

.flow-sequence {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.75rem;
  margin: 1.75rem 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.flow-sequence-step {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
}

.flow-sequence-arrow {
  font-size: 0.95rem;
  color: #b91c1c;
  font-weight: 600;
  padding: 0 0.1rem;
}

.process-flow {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.75rem 0;
  display: inline-block;
  min-width: 220px;
}

.process-flow-label {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: #b91c1c;
  margin-bottom: 0.6rem;
}

.process-flow-steps {
  list-style: none;
  padding: 0;
  margin: 0;
}

.process-flow-steps li {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  padding: 0.2rem 0;
}

.process-flow-steps li::before {
  content: "→ ";
  color: #b91c1c;
}

.article-body ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.article-body ul li {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

/* Original Publication Note */
.article-original-note {
  margin-top: 3.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-border);
}

.article-original-note p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 0.625rem;
}

.article-original-note a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: border-color 0.15s;
}

.article-original-note a:hover {
  border-color: var(--color-text);
}

/* Related Reading */
.article-related {
  padding-block: 4.5rem;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.article-related-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.article-related-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.article-related-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-block: 1.25rem;
  border-bottom: 1px solid var(--color-border);
  transition: background-color 0.15s;
}

.article-related-item:hover {
  background-color: var(--color-bg);
}

.article-related-item-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
}

.article-related-item-summary {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* Article page responsive */
@media (max-width: 768px) {
  .article-page-header {
    padding-top: 3rem;
    padding-bottom: 3.5rem;
  }

  .article-body-section {
    padding-block: 3.5rem;
  }

  .article-related {
    padding-block: 3.5rem;
  }
}