/* ================================
   CloudEndpoint.ai — Stylesheet
   ================================ */

:root {
  --blue-950: #040F1E;
  --blue-900: #071628;
  --blue-800: #0D2444;
  --blue-700: #163460;
  --blue-600: #1A4280;
  --blue-500: #1E54A8;
  --blue-400: #3B78D4;
  --blue-300: #6FA3E8;
  --blue-200: #A8C8F4;
  --blue-100: #D6E8FB;
  --blue-50:  #EEF5FD;

  --ink: #0A0F1A;
  --ink-secondary: #3D4A5C;
  --ink-tertiary: #7A8899;
  --ink-faint: #B8C4D0;

  --surface: #FFFFFF;
  --surface-raised: #F5F8FC;
  --surface-border: #E2EAF2;

  --accent: #1E54A8;
  --accent-hover: #163460;
  --accent-light: #EEF5FD;

  --font-sans: 'DM Sans', -apple-system, sans-serif;
  --font-mono: 'DM Mono', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --max-width: 1120px;
  --nav-height: 64px;

  --transition: 0.2s ease;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  background: var(--surface);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ================================
   Navigation
   ================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--surface-border);
}

.nav {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: background var(--transition);
}
.nav-logo:hover .logo-mark { background: var(--accent-hover); }

.logo-wordmark {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.logo-tld { color: var(--ink-tertiary); font-weight: 400; }

.nav-links {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-link {
  font-size: 14px;
  color: var(--ink-secondary);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
  font-weight: 400;
}
.nav-link:hover { color: var(--ink); background: var(--surface-raised); }

.nav-cta {
  font-size: 13px;
  font-weight: 500;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  transition: background var(--transition);
  white-space: nowrap;
}
.nav-cta:hover { background: var(--accent-hover); }

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s;
}

/* ================================
   Buttons
   ================================ */

.btn {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent);
  color: white;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--surface-border);
}
.btn-ghost:hover { background: var(--surface-raised); border-color: var(--ink-faint); }

/* ================================
   Hero
   ================================ */

.hero {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--surface-border);
  overflow: hidden;
  background: radial-gradient(ellipse 90% 70% at 75% -5%, var(--blue-50) 0%, transparent 65%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--blue-200);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-heading {
  font-size: clamp(2.25rem, 4vw, 3rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}
.hero-heading em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

.hero-sub {
  font-size: 16px;
  color: var(--ink-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 420px;
}

.hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Hero visual — card stack */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInUp 0.6s ease 0.3s both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-card-stack {
  position: relative;
  width: 340px;
  height: 220px;
  display: block;
  cursor: pointer;
}
.hero-card-stack:hover .stack-card--front {
  box-shadow: 0 16px 48px rgba(14, 36, 68, 0.18), 0 2px 8px rgba(14, 36, 68, 0.08);
  transform: translateY(-2px);
}
.stack-card--front {
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.stack-card {
  position: absolute;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
}

.stack-card--back {
  height: 180px;
  bottom: 0;
  left: 20px;
  right: -20px;
  background: var(--blue-50);
  transform: rotate(4deg);
}

.stack-card--mid {
  height: 190px;
  bottom: 8px;
  left: 10px;
  right: -10px;
  background: var(--blue-100);
  transform: rotate(2deg);
}

.stack-card--front {
  height: 200px;
  bottom: 16px;
  left: 0;
  right: 0;
  background: white;
  box-shadow: 0 12px 40px rgba(14, 36, 68, 0.14), 0 2px 8px rgba(14, 36, 68, 0.06);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.stack-card-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-tertiary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.stack-card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.4;
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
}

.stack-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stack-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  background: var(--accent-light);
  color: var(--accent);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--blue-200);
}

.stack-date {
  font-size: 12px;
  color: var(--ink-tertiary);
}

/* ================================
   Section shared styles
   ================================ */

.section-eyebrow {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 400;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.section-link {
  font-size: 13px;
  color: var(--accent);
  font-weight: 500;
  transition: color var(--transition);
  padding-bottom: 0.25rem;
}
.section-link:hover { color: var(--accent-hover); }

/* ================================
   Writing / Articles
   ================================ */

.section-writing {
  padding: 4rem 0;
  border-bottom: 1px solid var(--surface-border);
}

.articles-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1px;
  background: var(--surface-border);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.article-card {
  background: var(--surface);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: background var(--transition);
}
.article-card:hover { background: var(--surface-raised); }

.article-card--featured {
  background: linear-gradient(145deg, var(--blue-950) 0%, #0c2348 100%);
  color: white;
  position: relative;
  overflow: hidden;
}
.article-card--featured::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,120,212,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.article-card--featured:hover { background: linear-gradient(145deg, #0d2040 0%, var(--blue-700) 100%); }

.article-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-tertiary);
}
.article-card--featured .article-tag { color: var(--blue-300); }

.article-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.45;
  flex: 1;
}
.article-card--featured .article-title { color: white; font-size: 17px; }

.article-excerpt {
  font-size: 13px;
  color: var(--ink-secondary);
  line-height: 1.6;
}
.article-card--featured .article-excerpt { color: var(--blue-200); }

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-border);
  margin-top: auto;
}
.article-card--featured .article-footer { border-top-color: var(--blue-800); }

.article-date {
  font-size: 12px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}
.article-card--featured .article-date { color: var(--blue-300); }

.article-read-link {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  transition: color var(--transition);
}
.article-card--featured .article-read-link { color: var(--blue-200); }
.article-read-link:hover { color: var(--accent-hover); }

/* ================================
   Speaking
   ================================ */

.section-speaking {
  padding: 4rem 0;
  border-bottom: 1px solid var(--surface-border);
  background: var(--surface-raised);
}

.speaking-list {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.speaking-row {
  display: grid;
  grid-template-columns: 120px 1fr auto auto;
  gap: 1rem;
  align-items: center;
  padding: 1.1rem 1.5rem;
  border-bottom: 1px solid var(--surface-border);
  transition: background var(--transition);
}
.speaking-row:last-child { border-bottom: none; }
.speaking-row:hover { background: var(--surface-raised); }

.speaking-row--upcoming {
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  padding-left: calc(1.5rem - 2px);
}
a.speaking-row--upcoming { cursor: pointer; }
.speaking-row--upcoming:hover { background: #e4eef9; }

.date-label {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-tertiary);
}
.date-label.upcoming {
  color: var(--accent);
  font-weight: 500;
}

.speaking-event {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.speaking-topic {
  font-size: 13px;
  color: var(--ink-secondary);
  margin-top: 2px;
}

.speaking-location {
  font-size: 13px;
  color: var(--ink-tertiary);
  text-align: right;
}

.speaking-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 100px;
  font-family: var(--font-mono);
}
.speaking-badge.confirmed {
  background: #E6F4EA;
  color: #1A6B34;
  border: 1px solid #A8D5B5;
}
.speaking-badge.past {
  background: var(--surface-raised);
  color: var(--ink-tertiary);
  border: 1px solid var(--surface-border);
}

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

.section-about {
  padding: 4rem 0;
  border-bottom: 1px solid var(--surface-border);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 4rem;
  align-items: start;
}

.about-text {
  font-size: 15px;
  color: var(--ink-secondary);
  line-height: 1.75;
  margin-top: 1rem;
}
.about-text + .about-text { margin-top: 0.75rem; }

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 1.5rem;
}

.about-tag {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-secondary);
  background: var(--surface-raised);
  border: 1px solid var(--surface-border);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.about-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 3.5rem;
}

.about-link-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.875rem 1rem;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: all var(--transition);
}
.about-link-card:hover {
  border-color: var(--blue-300);
  background: var(--accent-light);
}

.about-link-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--blue-950);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-family: var(--font-mono);
  font-weight: 500;
  flex-shrink: 0;
}

.about-link-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

.about-link-sub {
  font-size: 12px;
  color: var(--ink-tertiary);
  margin-top: 1px;
}

/* ================================
   Footer
   ================================ */

.site-footer {
  padding: 1.75rem 0;
  border-top: 1px solid var(--surface-border);
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-logo .logo-mark {
  width: 26px;
  height: 26px;
}

.footer-copy {
  font-size: 13px;
  color: var(--ink-tertiary);
  margin-left: auto;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-link {
  font-size: 13px;
  color: var(--ink-tertiary);
  transition: color var(--transition);
}
.footer-link:hover { color: var(--ink); }

/* ================================
   Page hero (shared across inner pages)
   ================================ */

.page-hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--surface-border);
}

.page-hero-eyebrow {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-hero p {
  font-size: 16px;
  color: var(--ink-secondary);
  max-width: 520px;
  line-height: 1.7;
  margin-top: 0.75rem;
}

/* ================================
   Blog index
   ================================ */

.blog-index {
  padding: 3.5rem 0 5rem;
}

.post-featured {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  background: var(--surface);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.post-featured:hover {
  border-color: var(--blue-300);
  box-shadow: 0 4px 24px rgba(14, 36, 68, 0.08);
}

.post-featured-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.post-featured-title {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.post-featured-excerpt {
  font-size: 14px;
  color: var(--ink-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.post-featured-footer {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.post-featured-date {
  font-size: 12px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}

.post-featured-cta {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  transition: color var(--transition);
}
.post-featured:hover .post-featured-cta { color: var(--accent-hover); }

.post-featured-visual {
  background: linear-gradient(145deg, var(--blue-950) 0%, #0c2348 100%);
  border-radius: var(--radius-md);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.post-featured-visual::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,120,212,0.22) 0%, transparent 70%);
}
.post-featured-visual-label {
  font-size: 13px;
  font-weight: 500;
  color: white;
  font-family: var(--font-mono);
  opacity: 0.6;
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
  line-height: 1.5;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.post-card {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.post-card:hover {
  border-color: var(--blue-300);
  box-shadow: 0 4px 20px rgba(14, 36, 68, 0.07);
}

.post-card-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.post-card-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.post-card-excerpt {
  font-size: 13px;
  color: var(--ink-secondary);
  line-height: 1.65;
  flex: 1;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px solid var(--surface-border);
  margin-top: auto;
}

.post-card-date {
  font-size: 12px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}

.post-card-read {
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
}

/* ================================
   Blog post page
   ================================ */

.post-page {
  padding: 3rem 0 5rem;
}

.post-page-inner {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 4rem;
  align-items: start;
}

.post-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-tertiary);
  margin-bottom: 2rem;
  transition: color var(--transition);
}
.post-back-link:hover { color: var(--ink); }

.post-hero-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.post-hero-date {
  font-size: 13px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}

.post-hero-read {
  font-size: 12px;
  color: var(--ink-tertiary);
  background: var(--surface-raised);
  border: 1px solid var(--surface-border);
  padding: 2px 9px;
  border-radius: 100px;
  font-family: var(--font-mono);
}

.post-hero-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.post-hero-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--blue-200);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
}

.post-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-secondary);
}

.post-body h2 {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin: 2.5rem 0 0.75rem;
  padding-top: 0.5rem;
}

.post-body p {
  margin-bottom: 1.25rem;
}
.post-body p:last-child { margin-bottom: 0; }

.post-body ul,
.post-body ol {
  margin: 0 0 1.25rem 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-body li { color: var(--ink-secondary); }

.post-body strong {
  color: var(--ink);
  font-weight: 500;
}

.post-key-takeaways {
  background: var(--accent-light);
  border: 1px solid var(--blue-200);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2.5rem 0;
}

.post-key-takeaways-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  font-weight: 500;
}

.post-key-takeaways ul {
  margin: 0;
  padding-left: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.post-key-takeaways li {
  font-size: 14px;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.post-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-meta-block {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-meta-item {}

.post-meta-label {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-tertiary);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.post-meta-value {
  font-size: 13px;
  color: var(--ink);
}

.post-sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.post-sidebar-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-secondary);
  background: var(--surface-raised);
  border: 1px solid var(--surface-border);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.post-source-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.875rem 1rem;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: all var(--transition);
  font-size: 13px;
  color: var(--ink);
}
.post-source-link:hover {
  border-color: var(--blue-300);
  background: var(--accent-light);
}

.post-source-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--blue-950);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-family: var(--font-mono);
  font-weight: 500;
  flex-shrink: 0;
  letter-spacing: 0;
}

.post-source-text {}

.post-source-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.post-source-sub {
  font-size: 11px;
  color: var(--ink-tertiary);
  margin-top: 1px;
}

/* ================================
   Videos section
   ================================ */

.section-videos {
  padding: 4rem 0;
  border-bottom: 1px solid var(--surface-border);
}

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

.video-coming-soon {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 2rem 2.5rem;
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  text-decoration: none;
}
.video-coming-soon:hover {
  border-color: var(--blue-300);
  box-shadow: 0 4px 20px rgba(14, 36, 68, 0.07);
}

.video-coming-soon-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: linear-gradient(145deg, var(--blue-950) 0%, #0c2348 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.video-coming-soon-text {
  flex: 1;
}

.video-coming-soon-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.35rem;
}

.video-coming-soon-sub {
  font-size: 13px;
  color: var(--ink-secondary);
  line-height: 1.6;
  max-width: 480px;
}

.video-coming-soon-cta {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 680px) {
  .video-coming-soon {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1rem;
  }
}

.video-card {
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
  background: var(--surface);
}
.video-card:hover {
  border-color: var(--blue-300);
  box-shadow: 0 4px 20px rgba(14, 36, 68, 0.08);
}

.video-thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(145deg, var(--blue-900) 0%, var(--blue-700) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.video-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(59,120,212,0.25) 0%, transparent 70%);
}

.video-play-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 1.5px solid rgba(255,255,255,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  position: relative;
  z-index: 1;
  transition: background var(--transition);
}
.video-card:hover .video-play-btn {
  background: rgba(255,255,255,0.25);
}

.video-play-btn svg {
  width: 16px;
  height: 16px;
  fill: white;
  margin-left: 2px;
}

.video-info {
  padding: 1rem 1.25rem;
}
.video-tag {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.video-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.45;
  margin-bottom: 0.5rem;
}
.video-meta {
  font-size: 12px;
  color: var(--ink-tertiary);
  font-family: var(--font-mono);
}

/* ================================
   Scroll reveal
   ================================ */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ================================
   Animations
   ================================ */

.hero-content {
  animation: fadeInUp 0.5s ease both;
}

/* ================================
   Responsive
   ================================ */

/* --- Tablet: 960px --- */
@media (max-width: 960px) {
  .post-featured {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .post-featured-visual { aspect-ratio: 16/6; }
  .post-page-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .post-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .post-meta-block { flex: 1; min-width: 200px; }
}

/* --- Tablet: 900px --- */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-visual { display: none; }
  .articles-grid { grid-template-columns: 1fr; }
  .about-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .about-links { padding-top: 0; flex-direction: row; flex-wrap: wrap; }
  .about-link-card { flex: 1; min-width: 180px; }
  .footer-inner { flex-wrap: wrap; gap: 1rem; }
  .footer-copy { margin-left: 0; width: 100%; order: 3; }
  .videos-grid { grid-template-columns: 1fr 1fr; }
  .blog-index { padding: 2.5rem 0 3.5rem; }
  .post-page { padding: 2rem 0 3.5rem; }
}

/* --- Mobile: 680px --- */
@media (max-width: 680px) {
  /* Nav */
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: white;
    padding: 0.75rem 1.25rem 1.25rem;
    border-bottom: 1px solid var(--surface-border);
    z-index: 99;
    gap: 0;
    box-shadow: 0 8px 24px rgba(10,15,26,0.08);
  }
  .nav-links--open { display: flex; }
  .nav-link {
    padding: 0.8rem 0.5rem;
    font-size: 15px;
    border-bottom: 1px solid var(--surface-border);
  }
  .nav-link:last-child { border-bottom: none; }
  .nav-cta { display: none; }
  .nav-mobile-toggle { display: flex; }

  /* Hamburger animation */
  .nav-mobile-toggle--open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-mobile-toggle--open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
  .nav-mobile-toggle--open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-mobile-toggle span { transition: transform 0.2s ease, opacity 0.2s ease; }

  /* Sections */
  .container { padding: 0 1.1rem; }
  .hero { padding: 2.5rem 0 2rem; }
  .section-writing,
  .section-speaking,
  .section-videos,
  .section-about { padding: 2.5rem 0; }
  .blog-index { padding: 2rem 0 3rem; }
  .post-page { padding: 1.75rem 0 3rem; }
  .page-hero { padding: 2rem 0 1.75rem; }

  /* Section headers */
  .section-header { flex-direction: column; align-items: flex-start; gap: 0.5rem; }

  /* Speaking */
  .speaking-row {
    grid-template-columns: 80px 1fr;
    grid-template-rows: auto auto;
  }
  .speaking-location { display: none; }
  .speaking-badge { grid-column: 2; justify-self: start; }
  .speaking-row--upcoming { border-left-width: 3px; }

  /* Grids */
  .videos-grid { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: 1fr; }

  /* Blog */
  .post-featured { padding: 1.25rem; }
  .post-featured-visual { display: none; }
  .post-card { padding: 1.25rem; }
  .post-sidebar { gap: 0.75rem; }
  .post-meta-block { padding: 1rem; }
  .post-back-link { margin-bottom: 1.25rem; }
  .post-body { font-size: 15px; }
  .post-key-takeaways { padding: 1.25rem; }

  /* About */
  .about-link-card { min-width: 100%; }

  /* Hero buttons */
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { justify-content: center; text-align: center; }
}

/* --- Small phones: 400px --- */
@media (max-width: 400px) {
  .hero-heading { font-size: 2rem; }
  .section-title { font-size: 1.5rem; }
  .page-hero h1 { font-size: 1.75rem; }
  .post-featured-title { font-size: 1.1rem; }
  .nav { gap: 0.75rem; }
}