:root {
  --canvas: #f7f7f4;
  --primary: #f54e00;
  --primary-active: #d04200;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --semantic-error: #cf2d56;
  --semantic-success: #1f8a65;
}

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

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

body {
  background: var(--canvas);
  color: var(--body);
  font-family: Inter, system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--primary);
}

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

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

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

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  text-decoration: none;
  gap: 2px;
}

.logo-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}

.logo-tagline {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.logo-mark {
  color: var(--primary);
}

.primary-nav ul {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.primary-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body-strong);
  text-decoration: none;
}

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

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s, opacity 0.2s;
}

.burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.burger.open span:nth-child(2) {
  opacity: 0;
}

.burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: 68px 0 0 0;
  background: var(--canvas);
  z-index: 99;
  padding: 32px 24px;
  border-top: 1px solid var(--hairline);
  overflow-y: auto;
}

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

.mobile-nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
}

.mobile-nav a {
  display: block;
  padding: 16px 0;
  font-size: 18px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-soft);
}

.mobile-nav a:hover {
  color: var(--primary);
}

.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

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

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb .sep {
  color: var(--hairline-strong);
}

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

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

.hero-headline {
  font-size: 52px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  max-width: 700px;
  margin-bottom: 20px;
}

.hero-summary {
  font-size: 18px;
  line-height: 1.65;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 28px;
}

.hero-meta {
  font-size: 13px;
  color: var(--muted);
}

.section {
  padding: 80px 0;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.section-title {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin-bottom: 16px;
}

.section-lead {
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  max-width: 680px;
  margin-bottom: 48px;
}

.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 28px;
  transition: border-color 0.15s;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--hairline-strong);
}

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

.article-card-title {
  font-size: 20px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.2px;
  color: var(--ink);
  margin-bottom: 12px;
  flex: 1;
}

.article-card-excerpt {
  font-size: 15px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 16px;
}

.article-card-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.article-image-wrap {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--hairline-soft);
  border-radius: 8px;
  margin-bottom: 20px;
  overflow: hidden;
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.featured-article {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 40px;
  margin-bottom: 20px;
}

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

.featured-title {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin-bottom: 16px;
}

.featured-excerpt {
  font-size: 17px;
  line-height: 1.65;
  color: var(--body);
  margin-bottom: 24px;
}

.featured-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  text-decoration: none;
}

.read-more:hover {
  color: var(--primary-active);
}

.read-more::after {
  content: '\2192';
}

.article-page {
  padding: 48px 0 80px;
}

.article-header {
  max-width: 780px;
  margin: 0 auto 48px;
}

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

.article-title {
  font-size: 40px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 20px;
}

.article-summary {
  font-size: 18px;
  line-height: 1.65;
  color: var(--body);
  border-left: 3px solid var(--primary);
  padding-left: 20px;
  margin-bottom: 24px;
}

.article-meta-bar {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 40px;
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.3px;
  color: var(--ink);
  margin: 40px 0 16px;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin: 28px 0 12px;
}

.article-body p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-body li {
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  margin-bottom: 8px;
}

.toc {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px 28px;
  margin: 32px 0 40px;
}

.toc-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.toc ol {
  padding-left: 20px;
  margin: 0;
}

.toc li {
  font-size: 15px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.toc a {
  color: var(--ink);
}

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

.key-context {
  background: var(--hairline-soft);
  border-radius: 8px;
  padding: 24px 28px;
  margin: 32px 0;
}

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

.key-context p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--body);
  margin-bottom: 0;
}

.not-covered {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 24px 28px;
  margin: 40px 0;
}

.not-covered h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.not-covered ul {
  padding-left: 20px;
  margin: 0;
}

.not-covered li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 6px;
}

.related-articles {
  padding-top: 48px;
  border-top: 1px solid var(--hairline);
  margin-top: 48px;
}

.related-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 24px;
}

.page-content {
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 0 80px;
}

.page-content h1 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-content .page-updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 32px;
}

.page-content h2 {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin: 36px 0 12px;
}

.page-content p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  margin-bottom: 16px;
}

.page-content ul,
.page-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.page-content li {
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  margin-bottom: 8px;
}

.page-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-divider {
  height: 1px;
  background: var(--hairline);
  margin: 40px 0;
}

.contact-form {
  max-width: 560px;
  margin: 40px 0;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.15s;
  appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

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

.form-group .error-msg {
  font-size: 13px;
  color: var(--semantic-error);
  margin-top: 4px;
  display: none;
}

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: var(--semantic-error);
}

.form-group.has-error .error-msg {
  display: block;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-family: inherit;
  height: 40px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  transition: background 0.15s;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-success {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--semantic-success);
  border-radius: 8px;
  padding: 20px 24px;
  color: var(--semantic-success);
  font-size: 15px;
  margin-top: 16px;
}

.form-success.visible {
  display: block;
}

.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 40px;
}

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

.footer-brand-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
  max-width: 280px;
  margin-bottom: 12px;
}

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

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

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

.footer-links a {
  font-size: 14px;
  color: var(--body);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--primary);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-disclaimer-note {
  font-size: 12px;
  color: var(--muted-soft);
  margin-top: 4px;
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  padding: 20px 0;
  z-index: 200;
  display: none;
}

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

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

.cookie-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
  color: #e0dfd8;
  min-width: 200px;
}

.cookie-text a {
  color: #fff;
  text-decoration: underline;
}

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

.btn-cookie-accept {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

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

.btn-cookie-reject {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
}

.btn-cookie-reject:hover {
  border-color: rgba(255,255,255,0.6);
}

.btn-cookie-settings {
  background: transparent;
  color: #c0bdb5;
  border: none;
  font-size: 13px;
  text-decoration: underline;
  cursor: pointer;
  font-family: inherit;
}

.badge {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: 9999px;
  padding: 3px 10px;
}

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

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .primary-nav {
    display: none;
  }

  .burger {
    display: flex;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero-headline {
    font-size: 32px;
    letter-spacing: -0.5px;
  }

  .hero-summary {
    font-size: 16px;
  }

  .section {
    padding: 48px 0;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .featured-article {
    padding: 24px;
  }

  .featured-title {
    font-size: 24px;
  }

  .article-title {
    font-size: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .cookie-banner-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .article-card {
    padding: 20px;
  }

  .page-content h1 {
    font-size: 28px;
  }

  .article-meta-bar {
    flex-direction: column;
    gap: 8px;
  }
}