@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,600;0,700;0,800;1,400&display=swap');

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --c-bg: #000000;
  --c-surface: #121212;
  --c-surface2: #1a1a1a;
  --c-border: #242424;
  --c-accent: #1a3a6b;
  --c-accent-bright: #2d5be3;
  --c-accent-glow: #3b6fff;
  --c-text: #ffffff;
  --c-text-muted: #a0a0a0;
  --c-text-dim: #666666;
  --c-neon-blue: #4d7fff;
  --c-neon-gold: #ffd166;
  --c-radius: 28px;
  --c-radius-sm: 12px;
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --aside-w: 260px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  color-scheme: dark;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--c-neon-blue);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--c-accent-glow);
}

a:focus-visible {
  outline: 2px solid var(--c-accent-glow);
  outline-offset: 3px;
  border-radius: 4px;
}

ul {
  list-style: none;
}

.sr-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ── Layout wrap ── */
.site-wrap {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* ── Sidebar / Aside navigation ── */
.site-aside {
  width: var(--aside-w);
  min-height: 100vh;
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  flex-shrink: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--c-border) transparent;
}

.aside-nav {
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1rem 2rem;
  gap: 1.5rem;
  flex: 1;
}

.brand-row {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-border);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.brand-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -0.03em;
  text-shadow: 0 0 10px rgba(77, 127, 255, 0.4);
}

.brand-link:hover .brand-text {
  color: var(--c-neon-blue);
}

.nav-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.5rem 1rem;
  background: var(--c-accent-bright);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: var(--c-radius-sm);
  text-align: center;
  transition: background var(--transition), box-shadow var(--transition);
}

.nav-cta:hover {
  background: var(--c-accent-glow);
  color: #fff;
  box-shadow: 0 0 16px rgba(59, 111, 255, 0.5);
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-list li a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.75rem;
  border-radius: var(--c-radius-sm);
  color: var(--c-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  transition: background var(--transition), color var(--transition);
}

.nav-list li a:hover,
.nav-list li a[aria-current="page"] {
  background: var(--c-surface2);
  color: var(--c-text);
}

.nav-list li a[aria-current="page"] {
  border-left: 3px solid var(--c-neon-blue);
  padding-left: calc(0.75rem - 3px);
  color: var(--c-neon-blue);
  text-shadow: 0 0 10px rgba(77, 127, 255, 0.3);
}

/* ── Page body ── */
.page-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ── Breadcrumb ── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  padding: 1.25rem 2rem 0;
}

.breadcrumb a {
  color: var(--c-text-muted);
}

.breadcrumb a:hover {
  color: var(--c-neon-blue);
}

/* ── Section decoration ── */
.content-section {
  position: relative;
}

.section-deco {
  display: block;
  height: 3px;
  margin: 0 2rem 2rem;
  background: linear-gradient(90deg, var(--c-accent-bright) 0%, transparent 100%);
  border-radius: 2px;
}

.deco-line {
  display: block;
}

/* ── Section headings ── */
.section-h2 {
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--c-text);
  margin-bottom: 0.375rem;
}

.section-h2 + .subtitle,
.section-h2 + p.subtitle {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

p.subtitle {
  color: var(--c-text-muted);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

/* ─────────────────────────────────────
   HOME PAGE
───────────────────────────────────── */
.hero-section {
  position: relative;
  width: 100%;
  min-height: 100vh;
  background: #000;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  margin-bottom: -4rem;
}

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: brightness(0.7) saturate(0.6);
}

.hero-bg-num {
  position: absolute;
  bottom: 8%;
  left: -0.05em;
  font-size: clamp(120px, 20vw, 280px);
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.05);
  letter-spacing: -0.06em;
  line-height: 1;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: right;
  padding: 3rem 3rem 8rem 3rem;
  max-width: 680px;
  animation: heroFadeIn 0.8s ease both;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-neon-blue);
  text-shadow: 0 0 10px rgba(77, 127, 255, 0.6);
  margin-bottom: 1rem;
}

.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  margin-bottom: 1.25rem;
  color: var(--c-text);
}

.hero-sub {
  font-size: 1.0625rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 480px;
  margin-left: auto;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  min-height: 52px;
  padding: 0.875rem 2rem;
  background: var(--c-accent-bright);
  color: #fff;
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: var(--c-radius-sm);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.hero-btn:hover {
  background: var(--c-accent-glow);
  color: #fff;
  box-shadow: 0 0 24px rgba(59, 111, 255, 0.6);
  transform: translateY(-2px);
}

.hero-slash {
  display: none;
}

/* ── Home Main ── */
.home-main {
  padding: 5rem 0 0;
}

.intro-section {
  padding: 3rem 2rem;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.intro-text {
  padding: 0;
}

.page-content-wrap {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text-muted);
}

.page-content-wrap h2,
.page-content-wrap h3 {
  color: var(--c-text);
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.page-content-wrap p {
  margin-bottom: 1rem;
}

.page-content-wrap ul,
.page-content-wrap ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.page-content-wrap li {
  margin-bottom: 0.4rem;
  list-style: disc;
}

.page-content-wrap ol li {
  list-style: decimal;
}

.page-content-wrap a {
  color: var(--c-neon-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-content-wrap table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.page-content-wrap th,
.page-content-wrap td {
  border: 1px solid var(--c-border);
  padding: 0.6rem 0.9rem;
  text-align: left;
}

.page-content-wrap th {
  background: var(--c-surface2);
  color: var(--c-text);
  font-weight: 700;
}

/* ── Topic cards (home) ── */
.topics-section {
  padding: 3rem 2rem;
  background: var(--c-surface);
}

.topics-inner {
  max-width: 1080px;
  margin: 0 auto;
}

.topic-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--c-surface2);
  border-radius: var(--c-radius);
  border: 1px solid var(--c-border);
  border-bottom: 3px solid var(--c-accent-bright);
  color: var(--c-text);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, rgba(45, 91, 227, 0.08), transparent 70%);
  pointer-events: none;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 16px rgba(77, 127, 255, 0.15);
  border-bottom-color: var(--c-neon-blue);
}

.topic-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.4;
}

.topic-card-desc {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.5;
}

.topic-card-meta {
  font-size: 0.75rem;
  color: var(--c-neon-blue);
  font-weight: 600;
  margin-top: auto;
  padding-top: 0.5rem;
}

/* ── Latest articles (home) ── */
.latest-section {
  padding: 3rem 2rem;
}

.latest-aside {
  max-width: 860px;
  margin: 0 auto;
}

.article-link-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.article-link-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: var(--c-surface);
  border-radius: var(--c-radius-sm);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-accent-bright);
  color: var(--c-text);
  text-decoration: none;
  transition: background var(--transition), border-left-color var(--transition);
}

.article-link-block:hover {
  background: var(--c-surface2);
  border-left-color: var(--c-neon-blue);
  color: var(--c-text);
}

.article-link-block strong {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
}

.article-link-block span {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

.article-link-block time {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
}

/* ─────────────────────────────────────
   TOPIC PAGE
───────────────────────────────────── */
.topic-header {
  padding: 2rem 2rem 0;
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(180deg, var(--c-surface) 0%, transparent 100%);
}

.topic-h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin: 0.75rem 0 0.75rem;
}

.topic-lead {
  color: var(--c-text-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
  max-width: 720px;
  padding-bottom: 1.5rem;
}

.topic-main {
  padding: 0;
}

.topic-intro-section {
  padding: 2.5rem 2rem;
}

.topic-content-wrap {
  max-width: 800px;
}

.topic-content-wrap h2,
.topic-content-wrap h3 {
  color: var(--c-text);
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.topic-content-wrap p {
  color: var(--c-text-muted);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.topic-content-wrap ul,
.topic-content-wrap ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--c-text-muted);
}

.topic-content-wrap li {
  margin-bottom: 0.4rem;
  list-style: disc;
  line-height: 1.7;
}

.topic-content-wrap ol li {
  list-style: decimal;
}

.topic-content-wrap a {
  color: var(--c-neon-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.topic-children-section {
  padding: 2.5rem 2rem;
  background: var(--c-surface);
}

.children-aside {
  max-width: 1080px;
  margin: 0 auto;
}

.child-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.child-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--c-surface2);
  border-radius: var(--c-radius);
  border: 1px solid var(--c-border);
  border-bottom: 3px solid var(--c-accent-bright);
  color: var(--c-text);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), border-bottom-color var(--transition);
  opacity: 0;
  animation: revealUp 0.5s ease calc(var(--i, 0) * 0.07s) both;
}

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

.child-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5), 0 0 12px rgba(77,127,255,0.12);
  border-bottom-color: var(--c-neon-blue);
}

.child-card-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-text);
}

.child-card-desc {
  font-size: 0.875rem;
  color: var(--c-text-muted);
  line-height: 1.5;
}

.child-card-date {
  font-size: 0.75rem;
  color: var(--c-text-dim);
  margin-top: auto;
  padding-top: 0.5rem;
}

.empty-tip {
  color: var(--c-text-dim);
  font-size: 0.9375rem;
}

/* ─────────────────────────────────────
   ARTICLE PAGE
───────────────────────────────────── */
.article-header {
  padding: 2rem 2rem 1.5rem;
  border-bottom: 1px solid var(--c-border);
}

.article-hero-wrap {
  margin: 1.25rem 0;
  border-radius: var(--c-radius);
  overflow: hidden;
  max-height: 380px;
}

.article-hero-img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  filter: brightness(0.75);
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.article-date {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
}

.article-h1 {
  font-size: clamp(1.625rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.article-lead {
  font-size: 1.0625rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 700px;
}

.article-main {
  display: flex;
  flex-direction: column;
}

.article-body-section {
  padding: 2.5rem 2rem;
  max-width: 860px;
  width: 100%;
}

.article-body {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text-muted);
}

.article-body h2,
.article-body h3,
.article-body h4 {
  color: var(--c-text);
  font-weight: 700;
  margin-top: 2.25rem;
  margin-bottom: 0.625rem;
  letter-spacing: -0.025em;
}

.article-body h2 { font-size: 1.3125rem; }
.article-body h3 { font-size: 1.125rem; }
.article-body h4 { font-size: 1rem; font-weight: 600; }

.article-body p { margin-bottom: 1.125rem; }

.article-body strong { color: var(--c-text); }

.article-body ul,
.article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.125rem;
}

.article-body li {
  margin-bottom: 0.4rem;
  list-style: disc;
}

.article-body ol li { list-style: decimal; }

.article-body a {
  color: var(--c-neon-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-body a:hover { color: var(--c-accent-glow); }

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.article-body th,
.article-body td {
  border: 1px solid var(--c-border);
  padding: 0.6rem 0.9rem;
  text-align: left;
}

.article-body th {
  background: var(--c-surface2);
  color: var(--c-text);
  font-weight: 700;
}

.article-body code {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.875em;
  color: var(--c-neon-gold);
}

.article-body pre {
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  padding: 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.875rem;
}

.article-body blockquote {
  border-left: 4px solid var(--c-accent-bright);
  padding: 0.75rem 1.25rem;
  background: var(--c-surface);
  border-radius: 0 var(--c-radius-sm) var(--c-radius-sm) 0;
  margin-bottom: 1.25rem;
  color: var(--c-text-muted);
}

/* Related articles */
.related-section {
  padding: 2.5rem 2rem;
  background: var(--c-surface);
}

.related-aside {
  max-width: 860px;
  margin: 0 auto;
}

.related-links-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.related-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.25rem;
  background: var(--c-surface2);
  border-radius: var(--c-radius-sm);
  border: 1px solid var(--c-border);
  border-bottom: 3px solid var(--c-accent-bright);
  color: var(--c-text);
  text-decoration: none;
  transition: transform var(--transition), border-bottom-color var(--transition);
}

.related-link:hover {
  transform: translateX(4px);
  border-bottom-color: var(--c-neon-blue);
  color: var(--c-text);
}

.related-link strong {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--c-text);
}

.related-link span {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
}

/* Back nav */
.nav-back-section {
  padding: 2rem 2rem;
}

.nav-back-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  color: var(--c-text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  transition: border-color var(--transition), color var(--transition);
}

.back-link:hover {
  border-color: var(--c-neon-blue);
  color: var(--c-neon-blue);
}

/* ─────────────────────────────────────
   ABOUT PAGE
───────────────────────────────────── */
.about-header {
  padding: 3rem 2rem 2rem;
  border-bottom: 1px solid var(--c-border);
  background: linear-gradient(180deg, var(--c-surface) 0%, transparent 100%);
}

.about-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-neon-blue);
  margin-bottom: 0.75rem;
  text-shadow: 0 0 10px rgba(77,127,255,0.5);
}

.about-h1 {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.about-lead {
  font-size: 1.0625rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 680px;
}

.about-main {}

.about-intro-section {
  padding: 2.5rem 2rem;
  max-width: 860px;
}

.about-content-wrap {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text-muted);
}

.about-content-wrap h2,
.about-content-wrap h3 {
  color: var(--c-text);
  font-weight: 700;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
}

.about-content-wrap p { margin-bottom: 1rem; }

.about-content-wrap ul,
.about-content-wrap ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.about-content-wrap li { margin-bottom: 0.4rem; list-style: disc; }

.about-content-wrap a {
  color: var(--c-neon-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-topics-section {
  padding: 2.5rem 2rem;
  background: var(--c-surface);
}

.about-topics-aside {
  max-width: 860px;
  margin: 0 auto;
}

.about-topic-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.about-topic-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.25rem;
  background: var(--c-surface2);
  border-radius: var(--c-radius-sm);
  border: 1px solid var(--c-border);
  border-left: 4px solid var(--c-accent-bright);
  color: var(--c-text);
  text-decoration: none;
  transition: border-left-color var(--transition), transform var(--transition);
}

.about-topic-link:hover {
  border-left-color: var(--c-neon-blue);
  transform: translateX(4px);
  color: var(--c-text);
}

.about-topic-link strong {
  font-size: 0.9375rem;
  font-weight: 700;
}

.about-topic-link span {
  font-size: 0.8125rem;
  color: var(--c-text-muted);
}

.about-links-section {
  padding: 2.5rem 2rem;
}

.about-links-wrap { max-width: 860px; }

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

.quick-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0.625rem 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-bottom: 3px solid var(--c-accent-bright);
  border-radius: var(--c-radius-sm);
  color: var(--c-text);
  text-decoration: none;
  transition: border-bottom-color var(--transition), transform var(--transition);
}

.quick-link:hover {
  border-bottom-color: var(--c-neon-blue);
  transform: translateY(-2px);
  color: var(--c-text);
}

.quick-link strong {
  font-size: 0.9375rem;
  font-weight: 700;
}

/* ─────────────────────────────────────
   PRIVACY PAGE
───────────────────────────────────── */
.privacy-header {
  padding: 3rem 2rem 1.5rem;
  border-bottom: 1px solid var(--c-border);
}

.privacy-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-neon-blue);
  margin-bottom: 0.75rem;
}

.privacy-h1 {
  font-size: clamp(1.625rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
}

.privacy-date {
  font-size: 0.875rem;
  color: var(--c-text-dim);
}

.privacy-main {}

.privacy-body-section {
  padding: 2.5rem 2rem;
  max-width: 860px;
}

.privacy-content-wrap {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text-muted);
}

.privacy-content-wrap h2,
.privacy-content-wrap h3 {
  color: var(--c-text);
  font-weight: 700;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

.privacy-content-wrap p { margin-bottom: 1rem; }

.privacy-content-wrap ul,
.privacy-content-wrap ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.privacy-content-wrap li { margin-bottom: 0.4rem; list-style: disc; }

.privacy-content-wrap a {
  color: var(--c-neon-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.privacy-nav-section {
  padding: 2.5rem 2rem;
  background: var(--c-surface);
}

.privacy-nav-aside {
  max-width: 600px;
}

.privacy-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.privacy-nav-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0.625rem 1.5rem;
  background: var(--c-surface2);
  border: 1px solid var(--c-border);
  border-bottom: 3px solid var(--c-accent-bright);
  border-radius: var(--c-radius-sm);
  color: var(--c-text);
  text-decoration: none;
  transition: border-bottom-color var(--transition), transform var(--transition);
}

.privacy-nav-link:hover {
  border-bottom-color: var(--c-neon-blue);
  transform: translateY(-2px);
  color: var(--c-text);
}

.privacy-nav-link strong {
  font-size: 0.9375rem;
  font-weight: 700;
}

/* ─────────────────────────────────────
   FOOTER
───────────────────────────────────── */
.site-footer {
  margin-top: auto;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 2rem;
  padding: 2.5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {}

.brand-link-sm {
  font-size: 1rem;
  font-weight: 800;
  color: var(--c-text);
  letter-spacing: -0.03em;
  text-shadow: 0 0 10px rgba(77,127,255,0.3);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 0.5rem;
}

.brand-link-sm:hover {
  color: var(--c-neon-blue);
}

.footer-desc {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  line-height: 1.6;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer-nav a {
  display: flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--c-neon-blue);
}

.footer-contact {}

.footer-contact-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 0.4rem;
}

.footer-contact-desc {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.footer-contact-link {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0.4rem 1rem;
  border: 1px solid var(--c-border);
  border-radius: var(--c-radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text-muted);
  transition: border-color var(--transition), color var(--transition);
}

.footer-contact-link:hover {
  border-color: var(--c-neon-blue);
  color: var(--c-neon-blue);
}

.footer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.875rem 2rem;
  border-top: 1px solid var(--c-border);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
}

.footer-privacy {
  font-size: 0.8125rem;
  color: var(--c-text-dim);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition);
}

.footer-privacy:hover {
  color: var(--c-neon-blue);
}

/* ─────────────────────────────────────
   SCROLL REVEAL (plain CSS)
───────────────────────────────────── */
.reveal-item {
  opacity: 0;
  animation: revealUp 0.5s ease calc(var(--i, 0) * 0.07s) both;
}

/* ─────────────────────────────────────
   RESPONSIVE — Tablet (≤900px)
───────────────────────────────────── */
@media (max-width: 900px) {
  :root {
    --aside-w: 220px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .footer-contact {
    grid-column: 1 / -1;
  }

  .topic-cards-grid,
  .child-cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

/* ─────────────────────────────────────
   RESPONSIVE — Mobile (≤640px)
───────────────────────────────────── */
@media (max-width: 640px) {
  :root {
    --aside-w: 100%;
  }

  .site-wrap {
    flex-direction: column;
  }

  .site-aside {
    position: static;
    width: 100%;
    height: auto;
    min-height: unset;
    border-right: none;
    border-bottom: 1px solid var(--c-border);
  }

  .aside-nav {
    flex-direction: column;
    padding: 1rem;
    gap: 0.75rem;
  }

  .brand-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.75rem;
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem;
  }

  .nav-list li a {
    font-size: 0.8125rem;
    padding: 0.4rem 0.625rem;
  }

  .hero-section {
    min-height: 100svh;
    clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  }

  .hero-content {
    padding: 2rem 1.25rem 6rem;
    text-align: right;
  }

  .hero-h1 {
    font-size: 1.875rem;
  }

  .hero-bg-num {
    font-size: 100px;
  }

  .intro-section,
  .topics-section,
  .latest-section,
  .topic-intro-section,
  .topic-children-section,
  .article-body-section,
  .related-section,
  .nav-back-section,
  .about-intro-section,
  .about-topics-section,
  .about-links-section,
  .privacy-body-section,
  .privacy-nav-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .topic-cards-grid,
  .child-cards-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    padding: 1.5rem 1rem;
  }

  .footer-contact {
    grid-column: auto;
  }

  .footer-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }

  .article-header,
  .topic-header,
  .about-header,
  .privacy-header {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .breadcrumb {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .section-deco {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  .quick-links {
    flex-direction: column;
  }

  .quick-link {
    width: 100%;
    justify-content: center;
  }

  .privacy-nav-links {
    flex-direction: column;
  }

  .privacy-nav-link {
    width: 100%;
    justify-content: center;
  }

  .nav-back-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-link-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}

/* ─────────────────────────────────────
   REDUCED MOTION
───────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}