/* ============================================================
   APEX AI — Interior Pages (About, Start Here, Blog, Articles)
   ============================================================ */

/* Shared scroll-reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

/* ── Page Hero (interior) ────────────────────── */
.page-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 80% at 80% 50%, rgba(0,201,167,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 10% 30%, rgba(192,132,252,0.04) 0%, transparent 50%);
  pointer-events: none;
}
.page-hero__inner { position: relative; }
.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.page-hero__breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.page-hero__breadcrumb a:hover { color: var(--color-primary); }
.page-hero__breadcrumb span { color: var(--color-text-faint); }
.page-hero__eyebrow { margin-bottom: var(--space-4); }
.page-hero__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--color-text);
  max-width: 18ch;
  margin-bottom: var(--space-5);
}
.page-hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.6;
}

/* ── Section patterns ────────────────────────── */
.section-header {
  text-align: left;
  max-width: 100%;
  margin-bottom: var(--space-10);
}
.section-header--center {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}
.section-title {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.1;
}
.section-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ── About Page ──────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr;
  gap: clamp(var(--space-10), 6vw, var(--space-16));
  align-items: start;
}

.about-aside { display: flex; flex-direction: column; gap: var(--space-5); }

.aside-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.aside-card__title {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.aside-card__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.aside-card__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}
.aside-card__links a:hover {
  background: var(--color-surface-offset);
  color: var(--color-primary);
}
.aside-card__links a::before {
  content: '→';
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.mission-beliefs {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.mission-beliefs li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.mission-beliefs li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  flex-shrink: 0;
  margin-top: 8px;
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.tool-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
}
.tool-item:hover { border-color: var(--color-primary); }
.tool-item__name {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.tool-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.tool-item__link {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
}

/* ── Start Here Page ─────────────────────────── */
.start-here-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}
.path-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-7);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition-interactive);
}
.path-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.path-card__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 900;
  color: var(--color-primary);
  opacity: 0.3;
  line-height: 1;
}
.path-card__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}
.path-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.path-card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-2);
}
.path-card__link:hover { color: var(--color-primary-hover); }

/* Top articles list */
.article-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.article-list-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-5);
  align-items: start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  text-decoration: none;
  transition: all var(--transition-interactive);
}
.article-list-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.article-list-item__num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 900;
  color: var(--color-primary);
  opacity: 0.25;
  line-height: 1;
  min-width: 2ch;
}
.article-list-item__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.article-list-item__time { font-size: var(--text-xs); color: var(--color-text-faint); }
.article-list-item__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: 1.25;
  margin-bottom: var(--space-2);
}
.article-list-item__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ── Blog Index ──────────────────────────────── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
.blog-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-interactive);
}
.blog-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.blog-card__accent {
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-purple));
}
.blog-card__content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.blog-card__time { font-size: var(--text-xs); color: var(--color-text-faint); }
.blog-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-text);
}
.blog-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}
.blog-card__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: var(--space-2);
}
.blog-card__link:hover { color: var(--color-primary-hover); }

/* ── Article Page ────────────────────────────── */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: clamp(var(--space-10), 5vw, var(--space-16));
  align-items: start;
}
.article-sidebar {
  position: sticky;
  top: calc(68px + var(--space-6));
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}
.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}
.sidebar-card--cta {
  background: linear-gradient(135deg, var(--color-navy) 0%, #1a3a4f 100%);
  border-color: transparent;
}
[data-theme="dark"] .sidebar-card--cta {
  background: var(--color-surface-offset);
  border-color: var(--color-border);
}
.sidebar-card__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: var(--space-3);
}
[data-theme="dark"] .sidebar-card__label { color: var(--color-text-faint); }
.sidebar-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}
[data-theme="dark"] .sidebar-card__title { color: var(--color-text); }
.sidebar-card__desc {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-5);
  line-height: 1.6;
}
[data-theme="dark"] .sidebar-card__desc { color: var(--color-text-muted); }

/* Table of contents */
.toc-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.toc-list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  display: block;
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
  line-height: 1.4;
}
.toc-list a:hover {
  color: var(--color-primary);
  background: var(--color-surface-offset);
  border-left-color: var(--color-primary);
}

/* Related articles */
.related-articles {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}
.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: all var(--transition-interactive);
}
.related-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.related-card__cat { font-size: var(--text-xs); color: var(--color-primary); font-weight: 600; }
.related-card__title {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}
.related-card__arrow { font-size: var(--text-sm); color: var(--color-primary); margin-top: var(--space-2); }

/* ── CTA Section ─────────────────────────────── */
.cta-section {
  background: var(--color-navy);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 5vw, var(--space-16));
  text-align: center;
  position: relative;
  overflow: hidden;
}
[data-theme="dark"] .cta-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 50% 50%, rgba(0,201,167,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  position: relative;
}
.cta-section__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #ffffff;
  margin-bottom: var(--space-4);
  position: relative;
}
[data-theme="dark"] .cta-section__title { color: var(--color-text); }
.cta-section__desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.7);
  max-width: 50ch;
  margin: 0 auto var(--space-8);
  line-height: 1.6;
  position: relative;
}
[data-theme="dark"] .cta-section__desc { color: var(--color-text-muted); }
.cta-section__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  position: relative;
}

/* ── Responsive ──────────────────────────────── */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-aside { display: grid; grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .blog-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .start-here-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .about-aside { grid-template-columns: 1fr; }
}