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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --success: #1f8a65;
  --error: #cf2d56;
  --font-sans: 'Inter', system-ui, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--canvas);
  color: var(--body);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
}

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; }

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

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

.site-logo {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.site-logo span { color: var(--primary); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.2s;
}

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

.hero-band h1 {
  font-size: 72px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -2.16px;
  line-height: 1.1;
  max-width: 760px;
  margin-bottom: 24px;
}

.hero-band .hero-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.5;
  margin-bottom: 40px;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.badge-pill {
  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;
}

.section { padding: 80px 0; }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

h2 {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.72px;
  line-height: 1.2;
  margin-bottom: 16px;
}

h3 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  line-height: 1.25;
  margin-bottom: 12px;
}

h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.section-intro {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
  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: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}
.article-card:hover { border-color: var(--hairline-strong); }

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

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

.article-card-body .badge-pill { margin-bottom: 12px; }

.article-card-body h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

.article-card-body p {
  font-size: 14px;
  color: var(--body);
  flex: 1;
  margin-bottom: 20px;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 16px;
  margin-top: auto;
}

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

.link-arrow {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.link-arrow:hover { color: var(--primary); }

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

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

.feature-card .feature-icon {
  width: 40px;
  height: 40px;
  background: var(--surface-strong);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 18px;
}

.feature-card h4 { margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--body); }

.divider { border: none; border-top: 1px solid var(--hairline); margin: 0; }

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

.article-hero .breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}
.article-hero .breadcrumb a { color: var(--muted); }
.article-hero .breadcrumb a:hover { color: var(--ink); }

.article-hero h1 {
  font-size: 48px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -1.2px;
  line-height: 1.1;
  max-width: 720px;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}

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

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

.article-content { min-width: 0; }

.article-content p {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 26px;
  margin-top: 48px;
  margin-bottom: 16px;
}

.article-content h3 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-content ul, .article-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-content li {
  font-size: 16px;
  color: var(--body);
  margin-bottom: 8px;
  line-height: 1.5;
}

.article-content strong { color: var(--body-strong); font-weight: 600; }

.article-content .article-img {
  width: 100%;
  border-radius: 12px;
  margin: 32px 0;
  border: 1px solid var(--hairline);
}

.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: 24px;
  margin: 32px 0;
}
.info-box h4 { margin-bottom: 12px; }
.info-box p, .info-box li {
  font-size: 14px;
  color: var(--body);
}
.info-box ul { padding-left: 20px; margin-bottom: 0; }

.code-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink);
  line-height: 1.5;
  overflow-x: auto;
  margin: 24px 0;
}

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

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

.sidebar-card h4 { margin-bottom: 16px; }
.sidebar-card ul { list-style: none; padding: 0; margin: 0; }
.sidebar-card ul li { margin-bottom: 10px; }
.sidebar-card ul li a { font-size: 14px; color: var(--body); }
.sidebar-card ul li a:hover { color: var(--ink); }

.sidebar-card p { font-size: 14px; color: var(--body); margin-bottom: 0; }

.related-articles { padding: 64px 0; border-top: 1px solid var(--hairline); }
.related-articles h2 { margin-bottom: 32px; }

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

.page-hero h1 {
  font-size: 48px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -1.2px;
  line-height: 1.1;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
}

.page-body { padding: 64px 0 80px; }

.page-body p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 20px;
  max-width: 720px;
}

.page-body h2 {
  font-size: 26px;
  margin-top: 48px;
  margin-bottom: 16px;
}

.page-body h3 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 12px;
}

.page-body ul, .page-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
  max-width: 720px;
}
.page-body li {
  font-size: 16px;
  color: var(--body);
  margin-bottom: 8px;
}

.contact-section { padding: 64px 0; border-top: 1px solid var(--hairline); }
.contact-section h2 { margin-bottom: 8px; }
.contact-section .section-intro { margin-bottom: 40px; }

.contact-form {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 40px;
  max-width: 560px;
}

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-group input, .form-group textarea {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  height: 44px;
  font-size: 14px;
  color: var(--ink);
  font-family: var(--font-sans);
  transition: border-color 0.15s;
  outline: none;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--muted-soft); }
.form-group input:focus, .form-group textarea:focus { border-color: var(--ink); }
.form-group textarea { height: 120px; resize: vertical; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
  padding: 10px 18px;
  height: 40px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  min-width: 120px;
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }
.btn-primary:active { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-message {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
}
.form-message.success {
  background: #e8f5f0;
  color: var(--success);
  border: 1px solid #b8e0d2;
  display: block;
}
.form-message.error-msg {
  background: #fce8ec;
  color: var(--error);
  border: 1px solid #f0b8c8;
  display: block;
}

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

.about-img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--hairline);
}

.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 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  display: block;
  margin-bottom: 12px;
}
.footer-brand span { color: var(--primary); }

.footer-col p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 8px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: var(--body); }
.footer-col ul li a:hover { color: var(--ink); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--hairline);
  padding-top: 24px;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
  gap: 12px;
}

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

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  padding: 20px 0;
  z-index: 1000;
  display: none;
}

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

.cookie-inner p {
  font-size: 14px;
  color: #cfcdc4;
  flex: 1;
  min-width: 200px;
  margin: 0;
}

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

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

.btn-cookie-accept {
  background: var(--primary);
  color: var(--on-primary);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: background 0.15s;
}
.btn-cookie-accept:hover { background: var(--primary-active); }

.btn-cookie-reject {
  background: transparent;
  color: var(--canvas);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid #cfcdc4;
  cursor: pointer;
  font-family: var(--font-sans);
  transition: border-color 0.15s;
}
.btn-cookie-reject:hover { border-color: var(--canvas); }

.disclaimer-bar {
  background: var(--canvas-soft);
  border-bottom: 1px solid var(--hairline-soft);
  padding: 10px 0;
}
.disclaimer-bar p {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-col:first-child { grid-column: 1 / -1; }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero-band h1 { font-size: 40px; letter-spacing: -1px; }
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }
  .article-hero h1 { font-size: 32px; letter-spacing: -0.5px; }
  .page-hero h1 { font-size: 32px; letter-spacing: -0.5px; }
  .articles-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-col:first-child { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .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);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    margin-left: 0;
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--hairline-soft);
    width: 100%;
  }
  .site-nav a:last-child { border-bottom: none; }
  .contact-form { padding: 24px; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-band h1 { font-size: 32px; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}