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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --font: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-weight: 400;
  background: var(--canvas);
  color: var(--body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}

.site-logo {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink);
  flex-shrink: 0;
}
.site-logo:hover { color: var(--primary); }

.site-nav {
  display: flex;
  gap: 32px;
  align-items: center;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  transition: color 0.15s;
}
.nav-link:hover { color: var(--ink); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero {
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--ink);
  background: var(--surface-strong);
  border-radius: var(--radius-pill);
  padding: 4px 10px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.96px;
  color: var(--ink);
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  max-width: 480px;
}

.hero-image {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  aspect-ratio: 4/3;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section {
  padding: 80px 0;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.section-title {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 48px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}
.article-card:hover { border-color: var(--hairline-strong); }

.article-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--surface-strong);
}
.article-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.article-card:hover .article-card-image img { transform: scale(1.03); }

.article-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.article-card-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
}

.article-card-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}
.article-card:hover .article-card-title { color: var(--primary); }

.article-card-excerpt {
  font-size: 14px;
  line-height: 1.55;
  color: var(--body);
  flex: 1;
}

.article-card-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
}

.intro-band {
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}

.intro-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
}

.intro-content h2 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 20px;
}

.intro-content p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 16px;
}

.intro-image {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
}
.intro-image img { width: 100%; object-fit: cover; }

.topic-facts {
  padding: 80px 0;
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.fact-item {
  background: var(--surface-card);
  padding: 32px;
}

.fact-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.fact-value {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-bottom: 8px;
}

.fact-desc {
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
}

.article-layout {
  padding: 64px 0 80px;
}

.article-layout-inner {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: start;
}

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

.article-breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.article-breadcrumb a { color: var(--muted); }
.article-breadcrumb a:hover { color: var(--ink); }
.article-breadcrumb .sep { color: var(--hairline-strong); }

.article-title {
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -0.8px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
}

.article-featured-image {
  border-radius: var(--radius-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  margin-bottom: 40px;
}
.article-featured-image img { width: 100%; max-height: 460px; object-fit: cover; }
.article-image-caption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 0 0;
  background: none;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 40px 0 16px;
}

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

.article-body p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  padding-left: 20px;
  margin-bottom: 20px;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 8px;
}

.article-body blockquote {
  margin: 32px 0;
  padding: 24px 28px;
  background: var(--surface-card);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.article-body blockquote p {
  font-size: 18px;
  color: var(--ink);
  font-style: italic;
  margin: 0;
}

.article-body a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--primary); }

.article-sidebar {
  position: sticky;
  top: 88px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.sidebar-card-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-link-item {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline-soft);
}
.sidebar-link-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-link-item a { font-weight: 500; color: var(--ink); }
.sidebar-link-item a:hover { color: var(--primary); }

.page-layout {
  padding: 64px 0 80px;
  max-width: 760px;
}

.page-title {
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 8px;
}

.page-updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
}

.page-body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 36px 0 14px;
}

.page-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 24px 0 10px;
}

.page-body p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 18px;
}

.page-body ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 18px;
}
.page-body li {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 6px;
}

.contact-section {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--hairline);
}

.contact-section h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-bottom: 8px;
}

.contact-section p {
  font-size: 16px;
  color: var(--body);
  margin-bottom: 28px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 560px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

.form-group input,
.form-group textarea {
  font-family: var(--font);
  font-size: 16px;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--ink); }
.form-group textarea { min-height: 120px; resize: vertical; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--on-primary);
  background: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 24px;
  height: 44px;
  cursor: pointer;
  transition: background 0.15s;
  width: fit-content;
}
.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-message {
  font-size: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  display: none;
}
.form-message.success {
  display: block;
  color: var(--success);
  background: #f0faf6;
  border: 1px solid var(--success);
}
.form-message.error {
  display: block;
  color: var(--error);
  background: #fdf0f3;
  border: 1px solid var(--error);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline-strong);
  z-index: 1000;
  padding: 20px 0;
  display: none;
}
.cookie-banner.visible { display: block; }

.cookie-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-text {
  font-size: 14px;
  color: var(--body);
  flex: 1;
  min-width: 200px;
}
.cookie-text a { text-decoration: underline; color: var(--body); }

.cookie-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

.btn-cookie-accept {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--on-primary);
  background: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  padding: 8px 20px;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-cookie-accept:hover { background: var(--primary-active); }

.btn-cookie-reject {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-md);
  padding: 8px 20px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.btn-cookie-reject:hover { border-color: var(--ink); }

.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 48px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .site-logo {
  display: inline-block;
  margin-bottom: 12px;
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
  max-width: 240px;
}

.footer-heading {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
}
.footer-links a:hover { color: var(--ink); }

.footer-bottom {
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-copy,
.footer-updated {
  font-size: 13px;
  color: var(--muted);
}

.divider {
  height: 1px;
  background: var(--hairline);
  margin: 0;
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-title { font-size: 40px; }
  .articles-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .intro-inner { grid-template-columns: 1fr; gap: 32px; }
  .article-layout-inner { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .facts-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: 16px 24px 24px;
    flex-direction: column;
    gap: 4px;
  }
  .site-nav.open { display: flex; }
  .site-nav .nav-link {
    padding: 10px 0;
    font-size: 16px;
    border-bottom: 1px solid var(--hairline-soft);
    width: 100%;
  }
  .hero { padding: 48px 0; }
  .hero-title { font-size: 32px; letter-spacing: -0.64px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 28px; }
  .articles-grid { grid-template-columns: 1fr; }
  .article-title { font-size: 28px; }
  .page-title { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 4px; }
  .facts-grid { grid-template-columns: 1fr; }
  .cookie-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
  .topic-facts { padding: 56px 0; }
}