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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;
}

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

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

body {
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: var(--canvas);
  color: var(--body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

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

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

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

.section {
  padding: 80px 0;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 400;
  line-height: 1.2;
}

h1 {
  font-size: 72px;
  letter-spacing: -2.16px;
  line-height: 1.1;
}

h2 {
  font-size: 36px;
  letter-spacing: -0.72px;
}

h3 {
  font-size: 26px;
  letter-spacing: -0.325px;
  line-height: 1.25;
}

h4 {
  font-size: 22px;
  letter-spacing: -0.11px;
  line-height: 1.3;
}

.title-md {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

.title-sm {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

p {
  color: var(--body);
  line-height: 1.5;
}

code, pre {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.5;
}

pre {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px;
  overflow-x: auto;
  color: var(--ink);
}

code {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--ink);
}

hr {
  border: none;
  border-top: 1px solid var(--hairline);
}


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

.site-nav .container {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}

.nav-logo {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
  flex-shrink: 0;
  text-decoration: none;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
  flex: 1;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--body);
  text-decoration: none;
  transition: color 0.15s;
}

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

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
  margin-left: auto;
}

.nav-hamburger svg {
  display: block;
}


.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 10px 18px;
  height: 40px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 10px 18px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s;
}

.btn-secondary:hover {
  border-color: var(--ink);
  color: var(--ink);
}


.badge {
  display: inline-flex;
  align-items: center;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: 9999px;
  padding: 4px 10px;
}


.hero {
  padding: 80px 0;
  background: var(--canvas);
}

.hero-inner {
  max-width: 760px;
}

.hero h1 {
  margin-bottom: 24px;
  margin-top: 16px;
}

.hero-sub {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-image-wrap {
  margin-top: 64px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--hairline);
}

.hero-image-wrap img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}


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

.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.15s;
}

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

.article-card a {
  text-decoration: none;
  color: inherit;
}

.article-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-card-body {
  padding: 24px;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

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

.article-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: 0;
}

.article-card-body p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
}


.info-band {
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.info-item h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.4;
  letter-spacing: 0;
}

.info-item p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.6;
}


.article-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.article-hero h1 {
  font-size: 48px;
  letter-spacing: -1.2px;
  max-width: 820px;
  margin-bottom: 20px;
}

.article-hero-sub {
  font-size: 18px;
  color: var(--body);
  max-width: 680px;
  line-height: 1.55;
}

.article-hero-image {
  width: 100%;
  height: 460px;
  object-fit: cover;
  border-radius: 12px;
  margin-top: 48px;
  border: 1px solid var(--hairline);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 64px;
  padding: 64px 0 80px;
}

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

.article-content h2 {
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 48px;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
  line-height: 1.3;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 32px;
  margin-bottom: 12px;
  letter-spacing: -0.1px;
}

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

.article-content ul,
.article-content ol {
  padding-left: 20px;
  margin-bottom: 16px;
}

.article-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 6px;
}

.article-content img {
  border-radius: 12px;
  border: 1px solid var(--hairline);
  margin: 32px 0;
}

.article-content figcaption {
  font-size: 13px;
  color: var(--muted);
  margin-top: -24px;
  margin-bottom: 32px;
}

.info-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 24px 0;
}

.info-box p {
  margin-bottom: 0;
  font-size: 15px;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 15px;
  color: var(--body);
  line-height: 1.5;
}

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

.checklist li::before {
  content: '';
  width: 16px;
  height: 16px;
  min-width: 16px;
  border: 1.5px solid var(--hairline-strong);
  border-radius: 4px;
  margin-top: 2px;
}


.article-sidebar {
  position: sticky;
  top: 88px;
  align-self: start;
}

.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
  letter-spacing: 0;
  line-height: 1.4;
}

.sidebar-links {
  list-style: none;
  padding: 0;
}

.sidebar-links li {
  border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-links li:last-child {
  border-bottom: none;
}

.sidebar-links a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--body);
  text-decoration: none;
  line-height: 1.4;
}

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


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

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
}

.feature-card h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
  line-height: 1.4;
  letter-spacing: 0;
}

.feature-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}

.feature-icon {
  width: 36px;
  height: 36px;
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--muted);
}


.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 {
  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;
  line-height: 1.5;
  transition: border-color 0.15s;
  outline: none;
}

.form-group input {
  height: 44px;
}

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

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted-soft);
}

.form-message {
  display: none;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 15px;
  margin-top: 16px;
}

.form-message.success {
  background: #eaf7f2;
  color: var(--semantic-success);
  border: 1px solid #b3e5d5;
  display: block;
}

.form-loading {
  display: none;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
  margin-top: 12px;
}

.form-loading.active {
  display: flex;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--hairline-strong);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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


.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}

.page-hero h1 {
  font-size: 48px;
  letter-spacing: -1.2px;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 16px;
  color: var(--muted);
  max-width: 520px;
}

.prose {
  max-width: 720px;
}

.prose h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 40px;
  margin-bottom: 14px;
  letter-spacing: -0.2px;
}

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

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

.prose ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.prose li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 6px;
}

.prose a {
  color: var(--primary);
  text-decoration: underline;
}


.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  padding: 20px 24px;
  z-index: 200;
  display: none;
}

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

.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-text {
  flex: 1;
  min-width: 260px;
  font-size: 14px;
  color: var(--canvas);
  line-height: 1.5;
}

.cookie-text a {
  color: var(--canvas);
  text-decoration: underline;
}

.cookie-buttons {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.cookie-accept {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  height: 36px;
}

.cookie-reject {
  background: transparent;
  color: var(--canvas);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 8px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  height: 36px;
}


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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-top: 12px;
  max-width: 240px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  font-size: 14px;
  color: var(--body);
  text-decoration: none;
  line-height: 1.4;
}

.footer-col 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;
  flex-wrap: wrap;
  gap: 12px;
}

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

.footer-bottom a {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
}

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


.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

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

.breadcrumb li + li::before {
  content: '/';
  margin-right: 6px;
  color: var(--hairline-strong);
}


.disclaimer {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 40px;
}


@media (max-width: 1024px) {
  h1 {
    font-size: 56px;
    letter-spacing: -1.5px;
  }

  .article-hero h1 {
    font-size: 40px;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-sidebar {
    position: static;
  }

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

@media (max-width: 768px) {
  h1 {
    font-size: 40px;
    letter-spacing: -1px;
  }

  .hero {
    padding: 48px 0;
  }

  .hero-image-wrap img {
    height: 260px;
  }

  .section {
    padding: 48px 0;
  }

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

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

  .info-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
  }

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

  .nav-links a {
    padding: 10px 0;
    border-bottom: 1px solid var(--hairline-soft);
  }

  .nav-hamburger {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .site-nav {
    position: relative;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .article-hero h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }

  .page-hero h1 {
    font-size: 36px;
  }

  .cookie-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

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

@media (max-width: 640px) {
  h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }

  .articles-grid {
    gap: 16px;
  }

  .container {
    padding: 0 16px;
  }
}