@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;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-pill: 9999px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  background-color: var(--canvas);
  color: var(--body);
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  min-height: 100vh;
}

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

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

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

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* NAV */
.site-nav {
  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;
  justify-content: space-between;
  height: 64px;
}

.nav-wordmark {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
  line-height: 1;
}

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

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

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.4;
  transition: color 0.15s ease;
}

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

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

.nav-toggle svg {
  display: block;
}

.nav-mobile {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  padding: 16px 24px;
  z-index: 99;
}

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

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nav-mobile a {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

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

.hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: var(--r-pill);
  padding: 4px 10px;
  margin-bottom: 24px;
}

.hero-h1 {
  font-size: 64px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.8px;
  color: var(--ink);
  max-width: 780px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.5;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 40px;
}

.hero-img {
  margin-top: 48px;
  border-radius: var(--r-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
  background: var(--surface-card);
}

.hero-img img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* SECTION */
.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;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  max-width: 600px;
  margin-bottom: 48px;
}

.section + .section {
  border-top: 1px solid var(--hairline);
}

/* ARTICLE GRID */
.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(--r-lg);
  overflow: hidden;
  transition: border-color 0.15s ease;
}

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

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

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

.article-card-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: var(--r-pill);
  padding: 4px 10px;
  margin-bottom: 12px;
}

.article-card-title {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin-bottom: 12px;
}

.article-card-excerpt {
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 20px;
}

.article-card-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-card-meta span::before {
  content: '·';
  margin-right: 8px;
}

.article-card-meta span:first-child::before {
  content: none;
}

.article-card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

/* ARTICLE PAGE */
.article-layout {
  padding: 64px 0 80px;
}

.article-header {
  max-width: 760px;
  margin-bottom: 40px;
}

.article-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: var(--r-pill);
  padding: 4px 10px;
  margin-bottom: 16px;
}

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

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

.article-lead {
  font-size: 18px;
  line-height: 1.5;
  color: var(--body);
  max-width: 680px;
}

.article-hero-img {
  margin-bottom: 48px;
  border-radius: var(--r-lg);
  border: 1px solid var(--hairline);
  overflow: hidden;
}

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

.article-hero-img figcaption {
  padding: 10px 16px;
  font-size: 13px;
  color: var(--muted);
  border-top: 1px solid var(--hairline);
  background: var(--canvas-soft);
}

.article-body {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  align-items: start;
}

.article-content {
  max-width: 680px;
}

.article-content h2 {
  font-size: 26px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin: 28px 0 12px;
}

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

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

.article-content li {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 6px;
}

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

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

.article-content .callout {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  padding: 16px 20px;
  margin: 24px 0;
}

.article-content .callout p {
  margin: 0;
  font-size: 15px;
  color: var(--body-strong);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

.article-content th {
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 600;
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--hairline);
}

.article-content td {
  padding: 10px 14px;
  border: 1px solid var(--hairline);
  color: var(--body);
  background: var(--surface-card);
}

.article-content tr:nth-child(even) td {
  background: var(--canvas-soft);
}

.article-sidebar {
  position: sticky;
  top: 80px;
}

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

.sidebar-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
}

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

.sidebar-toc a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
}

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

.sidebar-related a {
  display: block;
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.sidebar-related a:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

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

/* PAGE LAYOUT (about, privacy, terms) */
.page-layout {
  padding: 64px 0 80px;
}

.page-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--hairline);
}

.page-h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 12px;
}

.page-sub {
  font-size: 16px;
  line-height: 1.5;
  color: var(--muted);
}

.page-content {
  max-width: 760px;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 36px 0 14px;
}

.page-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 24px 0 10px;
}

.page-content p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 14px;
}

.page-content ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.page-content li {
  font-size: 16px;
  line-height: 1.6;
  color: var(--body);
  margin-bottom: 6px;
}

.page-content a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* CONTACT FORM */
.contact-section {
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 64px;
  align-items: start;
}

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

.contact-info p {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 12px;
}

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 24px;
}

.contact-detail span {
  font-size: 14px;
  color: var(--muted);
}

.contact-detail strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.contact-form {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 32px;
}

.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(--canvas-soft);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  color: var(--ink);
  padding: 11px 16px;
  height: 44px;
  outline: none;
  transition: border-color 0.15s ease;
}

.form-group textarea {
  height: auto;
  min-height: 100px;
  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);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: var(--on-primary);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s ease;
  width: 100%;
}

.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-status {
  display: none;
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 500;
}

.form-status.success {
  display: block;
  background: #e8f5f0;
  color: var(--success);
  border: 1px solid #b8dfd2;
}

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

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

.footer-brand .footer-wordmark {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
  margin-bottom: 12px;
  display: block;
}

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

.footer-brand p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
  max-width: 260px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

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

.footer-col a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
}

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

.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

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

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

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 480px;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  z-index: 200;
  display: none;
}

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

.cookie-banner p {
  font-size: 13px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 16px;
}

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

.cookie-actions {
  display: flex;
  gap: 10px;
}

.cookie-accept {
  flex: 1;
  background: var(--ink);
  color: var(--canvas);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
}

.cookie-reject {
  flex: 1;
  background: transparent;
  color: var(--body);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
}

.cookie-accept:hover {
  background: var(--body-strong);
}

.cookie-reject:hover {
  border-color: var(--ink);
  color: var(--ink);
}

/* BREADCRUMB */
.breadcrumb {
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline-soft);
  margin-bottom: 32px;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.breadcrumb li {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: '/';
  color: var(--muted-soft);
}

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

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

.breadcrumb li:last-child {
  color: var(--body-strong);
}

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

  .article-body {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

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

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

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

  .section-title {
    font-size: 28px;
    letter-spacing: -0.5px;
  }

  .article-h1 {
    font-size: 32px;
    letter-spacing: -0.72px;
  }

  .page-h1 {
    font-size: 32px;
    letter-spacing: -0.72px;
  }

  .nav-links {
    display: none;
  }

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

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

  .hero-img img {
    height: 220px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .section {
    padding: 48px 0;
  }

  .hero {
    padding: 48px 0;
  }
}

@media (max-width: 640px) {
  .hero-h1 {
    font-size: 32px;
    letter-spacing: -0.72px;
  }

  .contact-form {
    padding: 24px 20px;
  }

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

  .cookie-banner {
    left: 16px;
    right: 16px;
    bottom: 16px;
  }
}