:root {
  --canvas: #010102;
  --surface-1: #0f1011;
  --surface-2: #141516;
  --surface-3: #18191a;
  --hairline: #23252a;
  --hairline-strong: #34343a;
  --primary: #5e6ad2;
  --primary-hover: #828fff;
  --primary-focus: #5e69d1;
  --ink: #f7f8f8;
  --ink-muted: #d0d6e0;
  --ink-subtle: #8a8f98;
  --ink-tertiary: #62666d;
  --success: #27a644;
  --font-display: 'SF Pro Display', -apple-system, 'Segoe UI', system-ui, sans-serif;
  --font-body: -apple-system, 'Segoe UI', system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Menlo', monospace;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.05px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--primary-hover); }

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ======================== HEADER ======================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  height: 68px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-mark svg { width: 18px; height: 18px; }

.logo-text {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.4px;
  line-height: 1;
}

.logo-text span {
  display: block;
  font-size: 10px;
  font-weight: 400;
  color: var(--ink-subtle);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-top: 2px;
}

.primary-nav { display: flex; align-items: center; gap: 4px; }

.primary-nav a {
  color: var(--ink-muted);
  font-size: 14px;
  font-weight: 400;
  padding: 6px 12px;
  border-radius: var(--r-md);
  transition: color 0.15s, background 0.15s;
}

.primary-nav a:hover,
.primary-nav a.active { color: var(--ink); background: var(--surface-1); }

.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
  border-radius: var(--r-md);
  transition: background 0.15s;
}

.burger:hover { background: var(--surface-1); }
.burger svg { display: block; width: 20px; height: 20px; }

/* ======================== MOBILE NAV ======================== */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--canvas);
  flex-direction: column;
  padding: 24px;
}

.mobile-nav.open { display: flex; }

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.mobile-nav-close {
  background: none;
  border: none;
  color: var(--ink);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--r-md);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-links a {
  color: var(--ink);
  font-size: 20px;
  font-weight: 500;
  padding: 14px 16px;
  border-radius: var(--r-lg);
  transition: background 0.15s;
}

.mobile-nav-links a:hover { background: var(--surface-1); }

/* ======================== HERO ======================== */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--hairline);
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -2px;
  color: var(--ink);
  max-width: 820px;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 600px;
  margin-bottom: 40px;
  letter-spacing: -0.1px;
}

.hero-image {
  width: 100%;
  border-radius: var(--r-xl);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--surface-1);
  aspect-ratio: 16/6;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-subtle);
  font-size: 14px;
  margin-top: 48px;
}

/* ======================== SECTIONS ======================== */
.section { padding: 80px 0; border-bottom: 1px solid var(--hairline); }
.section:last-child { border-bottom: none; }

.section-eyebrow {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--ink);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 18px;
  color: var(--ink-muted);
  max-width: 640px;
  line-height: 1.6;
  letter-spacing: -0.1px;
}

/* ======================== CARDS ======================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s, background 0.2s;
}

.card:hover { border-color: var(--hairline-strong); background: var(--surface-2); }

.card-category {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--primary);
}

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.4px;
  color: var(--ink);
}

.card-excerpt {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--ink-subtle);
  margin-top: 4px;
}

.card-meta span { display: flex; align-items: center; gap: 4px; }

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
  transition: gap 0.15s;
}

.card-link:hover { color: var(--primary-hover); gap: 8px; }

.card-image {
  background: var(--surface-2);
  border-radius: var(--r-md);
  aspect-ratio: 16/9;
  overflow: hidden;
  border: 1px solid var(--hairline);
  margin-bottom: 4px;
}

.card-image img { width: 100%; height: 100%; object-fit: cover; }

/* ======================== FEATURED ARTICLE ======================== */
.featured-article {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xl);
  padding: 40px;
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.featured-article-image {
  background: var(--surface-2);
  border-radius: var(--r-lg);
  aspect-ratio: 4/3;
  overflow: hidden;
  border: 1px solid var(--hairline);
}

.featured-article-image img { width: 100%; height: 100%; object-fit: cover; }

.featured-article-body { display: flex; flex-direction: column; gap: 16px; }

.featured-badge {
  display: inline-flex;
  align-items: center;
  background: var(--surface-2);
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--hairline);
  width: fit-content;
}

.featured-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.8px;
  color: var(--ink);
}

.featured-title a { color: var(--ink); }
.featured-title a:hover { color: var(--primary); }

.featured-summary {
  font-size: 16px;
  color: var(--ink-muted);
  line-height: 1.6;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-subtle);
  padding-top: 8px;
  border-top: 1px solid var(--hairline);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
  width: fit-content;
}

.btn-primary:hover { background: var(--primary-hover); color: #fff; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-1);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
  width: fit-content;
}

.btn-secondary:hover { background: var(--surface-2); border-color: var(--hairline-strong); color: var(--ink); }

/* ======================== ARTICLE PAGE ======================== */
.article-page { padding: 48px 0 80px; }

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-subtle);
  margin-bottom: 40px;
}

.breadcrumbs a { color: var(--ink-subtle); }
.breadcrumbs a:hover { color: var(--ink); }
.breadcrumbs .sep { color: var(--ink-tertiary); }

.article-header { margin-bottom: 40px; }

.article-category {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 16px;
}

.article-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  margin-bottom: 20px;
}

.article-summary-box {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--r-md);
  padding: 20px 24px;
  font-size: 16px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--ink-subtle);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
}

.article-meta strong { color: var(--ink-muted); font-weight: 500; }

.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
  margin-top: 40px;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.6px;
  color: var(--ink);
  margin: 40px 0 16px;
}

.article-body h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--ink);
  margin: 28px 0 12px;
}

.article-body p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-muted);
  margin-bottom: 20px;
  letter-spacing: -0.05px;
}

.article-body ul, .article-body ol {
  margin: 16px 0 20px 24px;
  color: var(--ink-muted);
  font-size: 17px;
  line-height: 1.7;
}

.article-body li { margin-bottom: 8px; }

.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: var(--surface-1);
  padding: 16px 20px;
  border-radius: 0 var(--r-md) var(--r-md) 0;
  margin: 24px 0;
  font-size: 17px;
  color: var(--ink-muted);
  font-style: italic;
  line-height: 1.6;
}

.article-image {
  width: 100%;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--hairline);
  margin: 32px 0;
  background: var(--surface-1);
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-subtle);
  font-size: 13px;
}

.article-image img { width: 100%; height: 100%; object-fit: cover; }

.article-image figcaption {
  font-size: 12px;
  color: var(--ink-subtle);
  padding: 10px 16px;
  background: var(--surface-1);
  border-top: 1px solid var(--hairline);
}

.not-cover-box {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
  margin: 40px 0;
}

.not-cover-box h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}

.not-cover-box ul {
  margin: 0;
  padding-left: 20px;
  color: var(--ink-subtle);
  font-size: 15px;
  line-height: 1.7;
}

/* ======================== TOC ======================== */
.toc-sidebar {
  position: sticky;
  top: 84px;
}

.toc-box {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 20px;
}

.toc-box h3 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: 16px;
}

.toc-box ol {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-box ol li {
  counter-increment: toc;
  font-size: 13px;
  color: var(--ink-muted);
}

.toc-box ol li::before {
  content: counter(toc) ". ";
  color: var(--ink-tertiary);
}

.toc-box ol li a {
  color: var(--ink-muted);
  transition: color 0.15s;
}

.toc-box ol li a:hover { color: var(--primary); }

.key-context-box {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 20px;
  margin-top: 16px;
}

.key-context-box h3 {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: 16px;
}

.key-context-box ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.key-context-box li {
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.5;
  padding-left: 12px;
  border-left: 2px solid var(--primary);
}

/* ======================== RELATED ARTICLES ======================== */
.related-articles { margin-top: 64px; padding-top: 40px; border-top: 1px solid var(--hairline); }

.related-articles h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin-bottom: 24px;
}

/* ======================== STATIC PAGES ======================== */
.static-page { padding: 60px 0 80px; }

.static-page-header { margin-bottom: 48px; }

.static-page-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 16px;
}

.static-page-lead {
  font-size: 18px;
  color: var(--ink-muted);
  line-height: 1.6;
  max-width: 640px;
}

.prose { max-width: 720px; }

.prose h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin: 40px 0 14px;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}

.prose p {
  font-size: 16px;
  color: var(--ink-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.prose ul, .prose ol {
  margin: 12px 0 16px 24px;
  color: var(--ink-muted);
  font-size: 16px;
  line-height: 1.7;
}

.prose li { margin-bottom: 6px; }

/* ======================== CONTACT FORM ======================== */
.contact-form {
  max-width: 600px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 40px;
}

.form-group { display: flex; flex-direction: column; gap: 8px; }

.form-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-muted);
}

.form-input,
.form-textarea {
  background: var(--surface-1);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  padding: 10px 14px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--primary-focus);
  box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.2);
}

.form-textarea { resize: vertical; min-height: 140px; }

.form-success {
  display: none;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--success);
  border-radius: var(--r-md);
  padding: 16px 20px;
  color: var(--ink-muted);
  font-size: 15px;
}

/* ======================== FOOTER ======================== */
.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 56px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--ink-subtle);
  line-height: 1.6;
  margin-top: 12px;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--ink-tertiary);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }

.footer-col ul li a {
  font-size: 14px;
  color: var(--ink-subtle);
  transition: color 0.15s;
}

.footer-col ul li a:hover { color: var(--ink); }

.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

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

/* ======================== COOKIE BANNER ======================== */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 540px;
  background: var(--surface-2);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-xl);
  padding: 20px 24px;
  z-index: 300;
  display: none;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.cookie-banner.visible { display: block; }

.cookie-banner p {
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.cookie-banner p a { color: var(--primary); }

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

.cookie-btn-accept {
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background 0.15s;
}

.cookie-btn-accept:hover { background: var(--primary-hover); }

.cookie-btn-reject {
  background: var(--surface-1);
  color: var(--ink-muted);
  border: 1px solid var(--hairline);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background 0.15s;
}

.cookie-btn-reject:hover { background: var(--surface-2); }

.cookie-btn-settings {
  background: none;
  color: var(--ink-subtle);
  border: none;
  font-size: 13px;
  padding: 8px;
  cursor: pointer;
  text-decoration: underline;
}

/* ======================== COVERAGE PAGE ======================== */
.coverage-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 40px;
  background: var(--hairline);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.coverage-item {
  background: var(--surface-1);
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  transition: background 0.15s;
}

.coverage-item:hover { background: var(--surface-2); }

.coverage-item-meta {
  font-size: 12px;
  color: var(--ink-subtle);
  margin-bottom: 8px;
  display: flex;
  gap: 12px;
}

.coverage-item-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: -0.3px;
  margin-bottom: 6px;
}

.coverage-item-title a { color: var(--ink); }
.coverage-item-title a:hover { color: var(--primary); }

.coverage-item-excerpt { font-size: 14px; color: var(--ink-subtle); line-height: 1.5; }

.coverage-item-arrow { color: var(--ink-subtle); font-size: 20px; }

/* ======================== UTILITIES ======================== */
.divider { height: 1px; background: var(--hairline); margin: 48px 0; }

.tag {
  display: inline-flex;
  background: var(--surface-2);
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--hairline);
}

/* ======================== RESPONSIVE ======================== */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .featured-article { grid-template-columns: 1fr; }
  .featured-article-image { aspect-ratio: 16/7; }
  .article-layout { grid-template-columns: 1fr; }
  .toc-sidebar { position: static; }
}

@media (max-width: 768px) {
  .primary-nav { display: none; }
  .burger { display: flex; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .hero { padding: 48px 0 40px; }
  .featured-article { padding: 24px; gap: 24px; }
  .article-layout { gap: 32px; }
  .coverage-item { grid-template-columns: 1fr; }
  .coverage-item-arrow { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .site-header { height: 60px; }
  .cookie-banner { left: 12px; right: 12px; bottom: 12px; }
}