@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

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

:root {
  --color-primary: #f54e00;
  --color-primary-active: #d04200;
  --color-canvas: #f7f7f4;
  --color-canvas-soft: #fafaf7;
  --color-surface-card: #ffffff;
  --color-surface-strong: #e6e5e0;
  --color-hairline: #e6e5e0;
  --color-hairline-soft: #efeee8;
  --color-hairline-strong: #cfcdc4;
  --color-ink: #26251e;
  --color-body: #5a5852;
  --color-body-strong: #26251e;
  --color-muted: #807d72;
  --color-muted-soft: #a09c92;
  --color-on-primary: #ffffff;
  --color-success: #1f8a65;
  --color-error: #cf2d56;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-pill: 9999px;
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-base: 16px;
  --space-md: 20px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;
}

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

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

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.site-nav {
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.nav-logo {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

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

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-ink);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

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

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

.hero h1 {
  font-family: var(--font-sans);
  font-size: 56px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--color-ink);
  max-width: 760px;
  margin-bottom: var(--space-lg);
}

.hero-desc {
  font-size: 18px;
  color: var(--color-body);
  max-width: 560px;
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

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

.hero-img {
  margin-top: var(--space-section);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-hairline);
  max-height: 480px;
  width: 100%;
  object-fit: cover;
}

.section {
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--color-hairline);
}

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

.section-title {
  font-family: var(--font-sans);
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: 18px;
  color: var(--color-body);
  max-width: 640px;
  line-height: 1.6;
  margin-bottom: var(--space-xxl);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color 0.15s;
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-base);
  border: 1px solid var(--color-hairline-soft);
}

.card-tag {
  display: inline-block;
  background: var(--color-surface-strong);
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: var(--space-xxs) var(--space-xs);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-xs);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.card-title a {
  color: inherit;
}

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

.card-excerpt {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  margin-bottom: var(--space-base);
}

.card-date {
  font-size: 13px;
  color: var(--color-muted);
}

.article-hero {
  padding: var(--space-section) 0 var(--space-xxl);
  border-bottom: 1px solid var(--color-hairline);
}

.article-hero-inner {
  max-width: 800px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-base);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

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

.article-date {
  font-size: 13px;
  color: var(--color-muted);
}

.article-hero h1 {
  font-family: var(--font-sans);
  font-size: 42px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.72px;
  color: var(--color-ink);
  margin-bottom: var(--space-lg);
}

.article-lead {
  font-size: 18px;
  color: var(--color-body);
  line-height: 1.7;
  max-width: 680px;
}

.article-content {
  padding: var(--space-section) 0;
}

.article-body {
  max-width: 720px;
}

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

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

.article-body p {
  font-size: 16px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--space-base);
}

.article-body ul,
.article-body ol {
  margin: var(--space-base) 0 var(--space-base) var(--space-xl);
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.7;
}

.article-body li {
  margin-bottom: var(--space-xs);
}

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

.article-body a:hover {
  color: var(--color-primary-active);
}

.article-img-block {
  margin: var(--space-xl) 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-hairline);
}

.article-img-block img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}

.article-img-caption {
  font-size: 13px;
  color: var(--color-muted);
  padding: var(--space-sm) var(--space-base);
  background: var(--color-canvas-soft);
  border-top: 1px solid var(--color-hairline);
}

.infobox {
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-base) var(--space-lg);
  margin: var(--space-xl) 0;
}

.infobox p {
  margin-bottom: 0;
  font-size: 15px;
  color: var(--color-body-strong);
}

.sources-box {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-top: var(--space-xxl);
}

.sources-box h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-base);
}

.sources-box ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sources-box li {
  font-size: 13px;
  color: var(--color-body);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-hairline-soft);
}

.sources-box li:last-child {
  border-bottom: none;
}

.sources-box a {
  color: var(--color-primary);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: var(--space-lg);
}

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

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

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

.page-hero {
  padding: var(--space-section) 0;
  border-bottom: 1px solid var(--color-hairline);
}

.page-hero h1 {
  font-size: 42px;
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.72px;
  margin-bottom: var(--space-base);
  max-width: 640px;
}

.page-hero p {
  font-size: 18px;
  color: var(--color-body);
  max-width: 560px;
  line-height: 1.6;
}

.page-content {
  padding: var(--space-section) 0;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.325px;
  margin: var(--space-xxl) 0 var(--space-base);
}

.page-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
  margin: var(--space-xl) 0 var(--space-sm);
}

.page-content p {
  font-size: 16px;
  color: var(--color-body);
  line-height: 1.7;
  margin-bottom: var(--space-base);
  max-width: 720px;
}

.page-content ul,
.page-content ol {
  margin: var(--space-base) 0 var(--space-base) var(--space-xl);
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.7;
  max-width: 720px;
}

.page-content li {
  margin-bottom: var(--space-xs);
}

.contact-form-section {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xxl);
  max-width: 600px;
}

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

.contact-form-section p {
  font-size: 15px;
  color: var(--color-body);
  margin-bottom: var(--space-xl);
  max-width: 100%;
}

.form-group {
  margin-bottom: var(--space-base);
}

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

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

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-ink);
}

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

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color 0.15s;
}

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

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

.form-success {
  display: none;
  background: #e8f7f2;
  border: 1px solid #9fd4c2;
  border-radius: var(--radius-md);
  padding: var(--space-base) var(--space-lg);
  color: var(--color-success);
  font-size: 15px;
  margin-top: var(--space-base);
}

.form-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 14px;
  color: var(--color-muted);
  margin-top: var(--space-base);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-hairline-strong);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

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

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xxl);
}

.footer-brand h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: var(--space-sm);
}

.footer-brand h3 span {
  color: var(--color-primary);
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-base);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: var(--space-xs);
}

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

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

.footer-bottom {
  margin-top: var(--space-xxl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-base);
}

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

.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-bottom-links a {
  font-size: 13px;
  color: var(--color-muted);
}

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

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

.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.cookie-text {
  font-size: 14px;
  color: var(--color-body);
  flex: 1;
}

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

.cookie-actions {
  display: flex;
  gap: var(--space-xs);
}

.btn-cookie-accept {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
}

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

.btn-cookie-reject {
  background: transparent;
  color: var(--color-body);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-hairline-strong);
  cursor: pointer;
}

.btn-cookie-reject:hover {
  background: var(--color-canvas-soft);
}

.related-articles {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-hairline);
}

.related-articles .section-label {
  margin-bottom: var(--space-lg);
}

.disclaimer-box {
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  padding: var(--space-base) var(--space-lg);
  margin-top: var(--space-section);
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  max-width: 720px;
}

@media (max-width: 1024px) {
  .hero h1 {
    font-size: 44px;
  }
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-base);
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-surface-card);
    border-bottom: 1px solid var(--color-hairline);
    flex-direction: column;
    padding: var(--space-base);
    gap: 0;
    z-index: 99;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a {
    display: block;
    padding: var(--space-sm) var(--space-xs);
    border-bottom: 1px solid var(--color-hairline-soft);
    font-size: 16px;
  }
  .nav-toggle {
    display: block;
  }
  .hero {
    padding: var(--space-xxl) 0;
  }
  .hero h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .card-grid,
  .card-grid-2 {
    grid-template-columns: 1fr;
  }
  .section {
    padding: var(--space-xxl) 0;
  }
  .section-title {
    font-size: 26px;
  }
  .article-hero h1 {
    font-size: 28px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .cookie-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 26px;
  }
  .contact-form-section {
    padding: var(--space-lg);
  }
}