/* Google Fonts loaded via <link> in base.njk for performance */

/* Inline SVG icons (replaces Font Awesome CDN) */
.icon {
  display: inline-block;
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  fill: currentColor;
}

:root {
  --color-bg-base: #020617;
  --color-bg-soft: rgba(15, 23, 42, 0.72);
  --color-surface: rgba(15, 23, 42, 0.68);
  --color-surface-strong: rgba(15, 23, 42, 0.92);
  --color-border: rgba(148, 163, 184, 0.25);
  --color-border-strong: rgba(94, 234, 212, 0.35);
  --color-text: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-accent: #38bdf8;
  --color-accent-strong: #0ea5e9;
  --color-highlight: #a855f7;
  --shadow-soft: 0 18px 35px -22px rgba(8, 47, 73, 0.65);
  --shadow-strong: 0 30px 60px -32px rgba(15, 23, 42, 0.9);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --transition: all 200ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Plus Jakarta Sans", "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(120% 120% at 90% 10%, rgba(56, 189, 248, 0.14), transparent 60%),
    radial-gradient(100% 100% at 0% 0%, rgba(168, 85, 247, 0.14), transparent 55%),
    linear-gradient(160deg, var(--color-bg-base) 0%, #0b1120 42%, #0f172a 100%);
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: linear-gradient(135deg, rgba(148, 163, 184, 0.08) 0%, rgba(15, 23, 42, 0) 50%),
    repeating-linear-gradient(0deg, transparent, transparent 18px, rgba(56, 189, 248, 0.04) 18px, rgba(56, 189, 248, 0.04) 36px);
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover,
 a:focus-visible {
  color: var(--color-accent-strong);
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.is-hidden {
  display: none !important;
}

main {
  display: block;
}

.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(2, 6, 23, 0.78);
  border-bottom: 1px solid rgba(148, 163, 184, 0.18);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  min-height: 80px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  position: relative;
  margin-left: auto;
}

.brand-mark {
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text);
  padding: 4px 10px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.55);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: nowrap;
  margin-left: 14px;
}

.nav-links-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.nav-group-label {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.65);
  white-space: nowrap;
}

.nav-divider {
  width: 1px;
  height: 28px;
  background: rgba(148, 163, 184, 0.22);
  flex-shrink: 0;
}

.nav-links a {
  color: var(--color-text-muted);
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-highlight));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.nav-links a[aria-current="page"] {
  color: var(--color-text);
}

.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 999px;
  color: var(--color-text);
  padding: 8px 14px;
  font-size: 0.9rem;
}

.nav-language {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 14px;
  padding-left: 16px;
  border-left: 1px solid rgba(148, 163, 184, 0.18);
}

.nav-language-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  white-space: nowrap;
}

.nav-language-options {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: nowrap;
}

.nav-language-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--color-text);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 999px;
  padding: 6px 14px;
  text-transform: uppercase;
  min-width: 44px;
}

.nav-language-link:hover,
.nav-language-link:focus-visible {
  background: rgba(56, 189, 248, 0.14);
  border-color: rgba(56, 189, 248, 0.45);
}

.nav-language-link.is-active,
.nav-language-link[aria-current="page"] {
  background: rgba(56, 189, 248, 0.18);
  border-color: rgba(56, 189, 248, 0.55);
  color: var(--color-accent);
}

.hero {
  padding: clamp(5rem, 16vw, 8rem) 0 clamp(3.5rem, 12vw, 5.5rem);
}

.hero-grid {
  display: grid;
  gap: clamp(2rem, 6vw, 3.5rem);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.eyebrow {
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-size: 0.85rem;
  color: rgba(148, 163, 184, 0.75);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  line-height: 1.1;
  font-weight: 700;
  color: var(--color-text);
  margin: 0;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 52ch;
  margin: 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.cta-button {
  border-radius: 999px;
  padding: 12px 22px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: var(--transition);
  font-size: 0.95rem;
}

.cta-button.primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
  color: #020617;
  box-shadow: 0 12px 22px -18px rgba(56, 189, 248, 0.8);
}

.cta-button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 32px -18px rgba(56, 189, 248, 0.8);
}

.cta-button.ghost {
  background: transparent;
  color: var(--color-text);
  border-color: rgba(148, 163, 184, 0.35);
}

.cta-button.ghost:hover {
  background: rgba(148, 163, 184, 0.12);
}

.hero-intro {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(2rem, 6vw, 3.5rem);
  align-items: center;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.hero-intro .hero-copy {
  flex: 1 1 320px;
}

.hero-image {
  flex-shrink: 0;
}

.profile-photo {
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border: 3px solid var(--color-border);
}

.profile-photo-sm {
  width: 180px;
  height: 180px;
}

.profile-photo-md {
  width: 240px;
  height: 240px;
}

@media (max-width: 640px) {
  .hero-intro {
    flex-direction: column-reverse;
    text-align: center;
  }
  
  .hero-intro .hero-actions {
    justify-content: center;
  }
  
  .profile-photo-sm {
    width: 140px;
    height: 140px;
  }
}

.stat-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px;
  box-shadow: var(--shadow-soft);
}

.stat-card h2 {
  margin: 0 0 6px;
  font-size: 1.4rem;
  font-weight: 600;
}

.stat-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.section {
  padding: clamp(3.5rem, 10vw, 5.5rem) 0;
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: clamp(2rem, 6vw, 3rem);
}

.section-header h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.section-header p {
  margin: 0;
  color: var(--color-text-muted);
  max-width: 66ch;
}

.card-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.25rem);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2rem);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent 55%);
  opacity: 0;
  transition: var(--transition);
}

.card:hover::before {
  opacity: 1;
}

.card > * {
  position: relative;
  z-index: 1;
}

.card h3,
.card h4,
.card h5 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.card ul li + li {
  margin-top: 0.4rem;
}

.experience-highlights {
  margin-bottom: clamp(2rem, 6vw, 3rem);
}

.timeline {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.25rem);
}

.timeline-card {
  overflow: visible;
  border-left: 2px solid rgba(56, 189, 248, 0.35);
  padding-left: clamp(1.4rem, 4vw, 2rem);
}

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.timeline-period {
  font-weight: 600;
  color: var(--color-text);
}

.timeline-role {
  font-weight: 500;
  color: rgba(148, 163, 184, 0.85);
}

.timeline-company {
  margin: 0.6rem 0 1rem;
  font-weight: 500;
  color: rgba(148, 163, 184, 0.75);
}

.timeline-card ul {
  margin-bottom: 1.1rem;
}


.timeline-tools .tag-pill {
  cursor: default;
}

.skill-card h3 {
  font-size: 1.15rem;
}

.certificate-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.certification-card {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1rem;
  align-items: center;
}

.certification-card .cert-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.22);
  height: 120px;
}

.certification-card .cert-badge .no-badge {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.certification-card h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

.certification-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.projects-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.project-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.18);
  aspect-ratio: 16 / 10;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project-card p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tagline-list {
  display: grid;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin: 0;
}

.contact-panel {
  display: grid;
  gap: 1.35rem;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  box-shadow: var(--shadow-strong);
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.contact-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.25);
  color: var(--color-text);
  font-size: 1.35rem;
}

.contact-links a:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.5);
  color: var(--color-accent);
}

.site-footer {
  padding: 2.5rem 0 2rem;
  border-top: 1px solid rgba(148, 163, 184, 0.16);
  background: rgba(2, 6, 23, 0.78);
}

.site-footer p {
  margin: 0;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

#scrollTopBtn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.3);
  background: rgba(15, 23, 42, 0.75);
  color: var(--color-text);
  font-size: 1.2rem;
  box-shadow: var(--shadow-soft);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  backdrop-filter: blur(12px);
}

#scrollTopBtn.is-visible {
  opacity: 1;
  pointer-events: auto;
}

.page-hero {
  padding-top: clamp(5rem, 14vw, 7rem);
}

.page-hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.25rem);
  margin: 0 0 1rem;
}

.page-hero p {
  margin: 0;
  color: var(--color-text-muted);
  max-width: 64ch;
}

.highlight-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.highlight-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: clamp(1.6rem, 5vw, 2.25rem);
  box-shadow: var(--shadow-soft);
}

.highlight-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.highlight-card ul {
  margin: 0;
  color: var(--color-text-muted);
  padding-left: 1.1rem;
}

.link-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.6rem, 4vw, 2.2rem);
  box-shadow: var(--shadow-soft);
}

.link-card .label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(148, 163, 184, 0.75);
}

.link-card h3 {
  margin: 0;
}

.link-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.link-card .cta-inline {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 600;
  color: var(--color-text);
}

.link-card .cta-inline:hover {
  color: var(--color-accent);
}

.link-card .status {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  width: fit-content;
}

/* Blog layout */
.blog-hero {
  padding-bottom: clamp(2.5rem, 8vw, 4rem);
}

.blog-hero-grid {
  align-items: stretch;
}

.hero-pane {
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.4rem);
  box-shadow: var(--shadow-strong);
  display: grid;
  gap: 1.1rem;
}

.hero-pane h2 {
  margin: 0;
  font-size: 1.35rem;
}

.hero-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.metric-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--color-text);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.blog-controls {
  padding-top: 0;
}

.blog-control-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.75rem, 4vw, 2.3rem);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1.75rem;
}

.blog-search {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
}
.article-hero {
  position: relative;
  padding: clamp(4rem, 10vw, 6rem) 0 clamp(3rem, 8vw, 4.5rem);
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.16), transparent 55%),
    linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(2, 6, 23, 0.92));
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 25% 10%, rgba(168, 85, 247, 0.22), transparent 45%);
  pointer-events: none;
}
.article-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(2rem, 5vw, 2.75rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}
.article-hero-copy {
  display: grid;
  gap: 1.2rem;
  overflow-wrap: break-word;
  width: min(72ch, 100%);
  margin: 0 auto;
}
.article-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.68);
  color: var(--color-text);
  text-decoration: none;
  width: fit-content;
  font-size: 0.85rem;
  transition: var(--transition);
}
.article-breadcrumb:hover {
  transform: translateX(-4px);
  border-color: rgba(56, 189, 248, 0.5);
  color: var(--color-accent);
}
.article-title {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3rem);
  letter-spacing: -0.02em;
}
.article-subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: clamp(1.05rem, 2.6vw, 1.2rem);
  max-width: 60ch;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(15, 23, 42, 0.55);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.meta-chip i {
  font-size: 0.95rem;
  color: var(--color-accent);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.article-tags .tag-pill {
  border-color: rgba(56, 189, 248, 0.35);
  background: rgba(8, 145, 178, 0.16);
  color: var(--color-text);
}
.article-body {
  padding: clamp(3rem, 8vw, 4.5rem) 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.92), rgba(2, 6, 23, 0.96));
}
.article-layout {
  display: block;
}
.article-content {
  background: rgba(15, 23, 42, 0.78);
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: var(--radius-xl);
  padding: clamp(1.75rem, 5vw, 2.4rem);
  box-shadow: var(--shadow-strong);
  display: grid;
  gap: clamp(1.2rem, 3vw, 1.7rem);
  font-size: 1.05rem;
  color: var(--color-text);
  line-height: 1.75;
  overflow-wrap: break-word;
  width: min(70ch, 100%);
  margin: 0 auto;
}
.article-content > * {
  min-width: 0;
}
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--color-text);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
  text-decoration: underline;
  text-decoration-color: rgba(56, 189, 248, 0.55);
  text-decoration-thickness: 0.12em;
  text-underline-offset: 0.25em;
}
.article-content h2 {
  font-size: clamp(1.65rem, 3.4vw, 2rem);
}
.article-content h3 {
  font-size: clamp(1.35rem, 3vw, 1.55rem);
}
.article-content h4 {
  font-size: 1.2rem;
}
.article-content p {
  margin: 0;
  color: var(--color-text);
}
.article-content blockquote {
  margin: 0;
  padding: 1.2rem 1.5rem;
  border-left: 3px solid rgba(56, 189, 248, 0.6);
  background: rgba(14, 165, 233, 0.08);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text);
  font-style: italic;
  max-width: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.article-content ul,
.article-content ol {
  padding-left: 1.4rem;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}
.article-content code {
  font-family: "Fira Code", "SFMono-Regular", Consolas, ui-monospace, monospace;
  font-size: 0.95em;
  background: rgba(15, 23, 42, 0.85);
  border-radius: 4px;
  padding: 0.15rem 0.35rem;
  border: 1px solid rgba(148, 163, 184, 0.2);
}
.article-content :not(pre) code {
  white-space: normal;
  word-break: break-word;
}
.article-content pre {
  margin: 0;
  padding: 1.4rem;
  background: rgba(15, 23, 42, 0.88);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.2);
  overflow-x: auto;
  box-shadow: var(--shadow-soft);
}
.article-content pre code {
  padding: 0;
  border: none;
  background: none;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.article-content thead {
  background: rgba(14, 165, 233, 0.1);
}
.article-content th,
.article-content td {
  padding: 0.85rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}
.article-content tbody tr:last-child td {
  border-bottom: none;
}
.article-content img {
  max-width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.18);
  box-shadow: var(--shadow-soft);
}
.article-content .table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: inherit;
  width: 100%;
}

.article-content .table-scroll table {
  width: 100%;
}
@media (max-width: 640px) {
  .article-hero {
    padding: clamp(3rem, 12vw, 4rem) 0 clamp(2.5rem, 10vw, 3.5rem);
  }
  .article-hero-copy {
    padding: 0 1.25rem;
  }
  .article-content {
    padding: 1.25rem;
    width: 100%;
  }
  .article-meta {
    flex-direction: column;
    align-items: flex-start;
  }
  .meta-chip {
    width: 100%;
    justify-content: flex-start;
  }
  .timeline-card {
    padding-left: 1.1rem;
  }
}

.blog-search i {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.blog-search input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  outline: none;
}

.blog-search input::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

.blog-search button {
  border: 1px solid rgba(56, 189, 248, 0.45);
  background: rgba(56, 189, 248, 0.14);
  color: var(--color-text);
  border-radius: 999px;
  padding: 0.55rem 1.3rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.blog-search button:hover {
  background: rgba(56, 189, 248, 0.24);
}

.tag-stack {
  display: grid;
  gap: 0.75rem;
}

.tag-stack-label {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(148, 163, 184, 0.75);
}

.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
}

.tag-list li {
  margin: 0;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(15, 23, 42, 0.55);
  color: var(--color-text-muted);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  appearance: none;
}

.tag-pill:hover,
.tag-pill:focus-visible {
  border-color: rgba(56, 189, 248, 0.45);
  color: var(--color-text);
}

.tag-pill.is-active {
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18), rgba(168, 85, 247, 0.18));
  color: var(--color-text);
  border-color: rgba(56, 189, 248, 0.55);
}

.blog-layout {
  display: grid;
  gap: clamp(2rem, 6vw, 2.75rem);
  grid-template-columns: minmax(0, 2.25fr) minmax(220px, 1fr);
  align-items: start;
}

.post-feed {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.1rem);
}

.post-card {
  position: relative;
  display: grid;
  gap: 0.85rem;
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.6rem, 4vw, 2.2rem);
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

.post-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.2), transparent 55%);
  opacity: 0;
  transition: var(--transition);
  pointer-events: none;
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: var(--shadow-strong);
}

.post-card:hover::before {
  opacity: 1;
}

.post-card.featured {
  border-color: rgba(56, 189, 248, 0.45);
  background: rgba(15, 23, 42, 0.78);
}

.post-link {
  color: inherit;
  text-decoration: none;
  display: grid;
  gap: 0.75rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.post-title {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 1.9rem);
}

.post-description {
  margin: 0;
  color: var(--color-text-muted);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.post-tags .tag-pill {
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
  cursor: default;
}

.post-card footer {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.post-card footer i {
  color: rgba(56, 189, 248, 0.8);
}

.blog-sidebar {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2rem);
}

.sidebar-card {
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: var(--radius-lg);
  padding: clamp(1.4rem, 3.5vw, 1.9rem);
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 1rem;
}

.sidebar-card h3 {
  margin: 0;
  font-size: 1.1rem;
}

.trend-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.trend-list li {
  display: grid;
  gap: 0.2rem;
}

.trend-list a {
  color: var(--color-text);
  font-weight: 600;
}

.trend-list a:hover {
  color: var(--color-accent);
}

.trend-list span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.series-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.series-list li {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.subscribe-card form {
  display: grid;
  gap: 0.75rem;
}

.subscribe-card input {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(2, 6, 23, 0.65);
  padding: 0.75rem 1rem;
  color: var(--color-text);
  font-size: 0.95rem;
}

.subscribe-card input::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

.subscribe-card button {
  border-radius: 999px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
  color: #020617;
  border: none;
  padding: 0.7rem 1.4rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.subscribe-card button:hover {
  filter: brightness(1.05);
}

.blog-footer-cta {
  padding-top: 0;
}

.blog-footer-card {
  background: rgba(15, 23, 42, 0.82);
  border: 1px solid rgba(56, 189, 248, 0.32);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 2.8rem);
  box-shadow: var(--shadow-strong);
  text-align: center;
  display: grid;
  gap: 1.2rem;
}

.blog-footer-card h2 {
  margin: 0;
}

.footer-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

@media (max-width: 960px) {
  .certification-card {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .certification-card .cert-badge {
    justify-self: flex-start;
    width: 150px;
    height: 150px;
  }

  .blog-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: absolute;
    top: calc(100% + 12px);
    right: 24px;
    width: min(300px, calc(100vw - 48px));
    flex-direction: column;
    align-items: flex-start;
    background: rgba(2, 6, 23, 0.92);
    padding: 18px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(148, 163, 184, 0.22);
    box-shadow: var(--shadow-soft);
    display: none;
    margin-left: 0;
    gap: 16px;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text-muted);
    margin-left: auto;
  }

  .nav-links-group {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .nav-group-label {
    font-size: 0.7rem;
    color: rgba(148, 163, 184, 0.7);
  }

  .nav-divider {
    width: 100%;
    height: 1px;
    background: rgba(148, 163, 184, 0.22);
  }

  .nav-language {
    width: 100%;
    margin-left: 0;
    padding-left: 0;
    margin-top: 12px;
    padding-top: 12px;
    border-left: none;
    border-top: 1px solid rgba(148, 163, 184, 0.22);
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .nav-language-options {
    width: 100%;
    justify-content: space-between;
  }

  .nav-language-link {
    flex: 1 1 0;
    justify-content: center;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }

  #scrollTopBtn {
    right: 20px;
    bottom: 20px;
  }

  .blog-search {
    flex-direction: column;
    align-items: stretch;
  }

  .blog-search button {
    width: 100%;
  }

  .footer-cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 540px) {
  .container {
    width: calc(100% - 32px);
  }

  .certification-card .cert-badge {
    width: 100%;
    height: 160px;
  }

  .tag-list {
    gap: 0.5rem;
  }

  .blog-footer-card {
    padding: 2rem;
  }
}

/* 404 page */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}

.error-page h1 {
  font-size: 6rem;
  font-weight: 700;
  margin: 0;
  background: linear-gradient(135deg, var(--color-accent), var(--color-highlight));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.error-subtitle {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0.5rem 0 1rem;
}