@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 {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --primary: #f54e00;
  --primary-active: #d04200;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --on-primary: #ffffff;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --semantic-success: #1f8a65;
  --semantic-error: #cf2d56;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
}

html { font-size: 16px; 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;
  -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; }

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

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

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

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

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

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

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

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

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

.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  transition: border-color 0.15s;
  line-height: 1;
}

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

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.2s;
}

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

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

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-mobile ul li a {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--body);
  border-bottom: 1px solid var(--hairline-soft);
}

.nav-mobile ul li:last-child a { border-bottom: none; }

.nav-mobile .mobile-cta {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-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;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  margin-bottom: 20px;
}

.hero-h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--ink);
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--body);
  max-width: 440px;
  margin-bottom: 32px;
}

.hero-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.hero-img-wrap {
  border-radius: var(--rounded-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--surface-card);
}

.hero-img-wrap img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

/* BREADCRUMB */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
  border-bottom: 1px solid var(--hairline-soft);
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 6px; }

/* SECTION */
.section { padding: 80px 0; }
.section-sm { padding: 48px 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;
  color: var(--body);
  line-height: 1.5;
  max-width: 600px;
  margin-bottom: 48px;
}

/* ARTICLE CARDS */
.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(--rounded-lg);
  overflow: hidden;
  transition: border-color 0.15s;
}

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

.article-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--surface-strong);
}

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

.article-card-body { padding: 20px 24px 24px; }

.article-card-tag {
  display: inline-flex;
  background: var(--surface-strong);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--rounded-pill);
  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: 8px;
}

.article-card-excerpt {
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 16px;
}

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

/* FEATURED ARTICLE */
.featured-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin-bottom: 48px;
}

.featured-article-img {
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--canvas-soft);
}

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

.featured-article-body { padding: 32px 32px 32px 0; }

/* ARTICLE PAGE */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  align-items: start;
}

.article-header { margin-bottom: 32px; }

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

.article-h1 {
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 16px;
}

.article-intro {
  font-size: 18px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--hairline-soft);
}

.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: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin: 28px 0 12px;
}

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

.article-content ul, .article-content ol {
  margin: 0 0 20px 24px;
}

.article-content li {
  font-size: 16px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 6px;
}

.article-content figure {
  margin: 32px 0;
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  background: var(--surface-card);
}

.article-content figure img { width: 100%; }

.article-content figcaption {
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  padding: 12px 16px;
  border-top: 1px solid var(--hairline-soft);
}

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

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

.article-ref-box {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 20px;
  margin: 32px 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--body);
}

.article-ref-box strong { color: var(--ink); }

.article-ref-box a { color: var(--body); text-decoration: underline; text-underline-offset: 2px; }

.code-inline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-xs);
  padding: 2px 6px;
  color: var(--ink);
}

/* SIDEBAR */
.sidebar { position: sticky; top: 88px; }

.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 20px;
  margin-bottom: 16px;
}

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

.sidebar-links { list-style: none; }
.sidebar-links li { padding: 6px 0; border-bottom: 1px solid var(--hairline-soft); }
.sidebar-links li:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-links a { font-size: 14px; color: var(--body); line-height: 1.4; }
.sidebar-links a:hover { color: var(--ink); }

/* TESSELLATIONS / VISUAL BAND */
.visual-band {
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 80px 0;
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.visual-tile {
  border-radius: var(--rounded-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--canvas-soft);
}

.visual-tile img { width: 100%; aspect-ratio: 1; object-fit: cover; }

.visual-tile-caption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
  border-top: 1px solid var(--hairline-soft);
}

/* ABOUT / PAGES */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline-soft);
  margin-bottom: 48px;
}

.page-h1 {
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 12px;
}

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

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

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 40px 0 12px;
  line-height: 1.25;
}

.page-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}

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

.page-content ul, .page-content ol { margin: 0 0 16px 24px; }
.page-content li { font-size: 16px; line-height: 1.5; color: var(--body); margin-bottom: 6px; }

/* CONTACT FORM */
.contact-form-wrap {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 32px;
  max-width: 560px;
  margin-top: 40px;
}

.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);
  color: var(--ink);
  font-family: inherit;
  font-size: 16px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  height: 44px;
  outline: none;
  transition: border-color 0.15s;
}

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

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

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

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

.form-submit-row { display: flex; align-items: center; gap: 16px; }

.form-status {
  font-size: 14px;
  color: var(--semantic-success);
  display: none;
}

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

/* CTA BAND */
.cta-band {
  background: var(--canvas);
  padding: 96px 0;
  text-align: center;
  border-top: 1px solid var(--hairline-soft);
}

.cta-band-title {
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 24px;
}

.cta-band-sub { font-size: 16px; color: var(--body); margin-bottom: 32px; max-width: 480px; margin-left: auto; margin-right: auto; }

/* FOOTER */
.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-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

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

.footer-brand-desc { font-size: 14px; color: var(--body); line-height: 1.5; max-width: 220px; }

.footer-col-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.footer-links { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 14px; color: var(--body); line-height: 1.5; }
.footer-links a:hover { color: var(--ink); }

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

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

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 540px;
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: 20px 24px;
  z-index: 999;
  display: none;
  box-shadow: 0 4px 24px rgba(38,37,30,0.18);
}

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

.cookie-banner p { font-size: 14px; line-height: 1.5; margin-bottom: 16px; color: var(--canvas-soft); }

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

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

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

.cookie-reject {
  background: transparent;
  color: var(--canvas-soft);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--rounded-md);
  border: 1px solid rgba(255,255,255,0.3);
  cursor: pointer;
}

/* DISCLAIMER */
.disclaimer {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline-soft);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin: 32px 0 0;
}

/* UPDATED DATE */
.updated-date {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 32px;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-h1 { font-size: 56px; letter-spacing: -1.5px; }
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .featured-article { grid-template-columns: 1fr; }
  .featured-article-img { aspect-ratio: 16/9; }
  .featured-article-body { padding: 24px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-h1 { font-size: 36px; letter-spacing: -1px; }
  .section-title { font-size: 28px; }
  .visual-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .articles-grid { grid-template-columns: 1fr; }
  .visual-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-band { padding: 48px 0; }
  .section { padding: 48px 0; }
  .cta-band { padding: 64px 0; }
  .cookie-banner { left: 16px; right: 16px; bottom: 16px; }
}