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

html { scroll-behavior: smooth; }

body {
  background: var(--canvas);
  color: var(--body);
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  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; }

/* NAV */
.site-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.11px;
  flex-shrink: 0;
}
.nav-logo:hover { color: var(--primary); }
.nav-links {
  display: flex;
  list-style: none;
  gap: 0;
  margin-left: auto;
}
.nav-links li a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  transition: color 0.15s;
}
.nav-links li a:hover { color: var(--ink); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.2s;
}

/* HERO */
.hero {
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.hero-label {
  display: inline-block;
  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: 24px;
}
.hero h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.5;
  margin-bottom: 48px;
}
.hero-img-wrap {
  border-radius: var(--rounded-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--surface-card);
  max-width: 860px;
}
.hero-img-wrap img {
  width: 100%;
  height: 420px;
  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: 16px;
}
.section-title {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.72px;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-intro {
  font-size: 16px;
  color: var(--body);
  max-width: 640px;
  margin-bottom: 48px;
}
.section-divider {
  border: none;
  border-top: 1px solid var(--hairline);
}

/* ARTICLE GRID */
.article-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;
  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-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.article-card h3 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 12px;
}
.article-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 20px;
}
.article-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
  align-self: flex-start;
}
.article-link:hover { color: var(--primary-active); border-color: var(--primary-active); }

/* INFO BAND */
.info-band {
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: 80px 0;
}
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
}
.info-item {
  background: var(--surface-card);
  padding: 32px 24px;
}
.info-item-num {
  font-size: 36px;
  font-weight: 400;
  color: var(--primary);
  letter-spacing: -0.72px;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}
.info-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.info-item p { font-size: 14px; color: var(--body); line-height: 1.5; }

/* CONTACT FORM */
.contact-section { padding: 80px 0; }
.form-wrap {
  max-width: 640px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 40px;
}
.form-row { margin-bottom: 20px; }
.form-row label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-row input,
.form-row textarea {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  font-size: 16px;
  color: var(--ink);
  font-family: inherit;
  transition: border-color 0.15s;
  height: 44px;
}
.form-row textarea { height: 120px; resize: vertical; }
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--ink);
}
.form-row input.error,
.form-row textarea.error { border-color: var(--error); }
.form-error-msg {
  font-size: 13px;
  color: var(--error);
  margin-top: 4px;
  display: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 10px 18px;
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}
.btn-primary:hover { background: var(--primary-active); }
.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 10px 18px;
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s;
}
.btn-secondary:hover { border-color: var(--ink); }
.form-status {
  margin-top: 16px;
  font-size: 14px;
  display: none;
}
.form-status.success { color: var(--success); }
.form-status.loading { color: var(--muted); }

/* ARTICLE PAGE */
.article-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--hairline);
}
.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;
  letter-spacing: -1.2px;
  color: var(--ink);
  line-height: 1.15;
  max-width: 760px;
  margin-bottom: 20px;
}
.article-hero .article-meta {
  font-size: 13px;
  color: var(--muted);
}
.article-body {
  padding: 56px 0 80px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 64px;
  align-items: start;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-top: 40px;
  margin-bottom: 16px;
}
.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 12px;
}
.article-content p {
  color: var(--body);
  margin-bottom: 20px;
  line-height: 1.6;
}
.article-content ul,
.article-content ol {
  color: var(--body);
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-content li { margin-bottom: 8px; line-height: 1.5; }
.article-content a { color: var(--primary); }
.article-content a:hover { color: var(--primary-active); }
.article-content .img-wrap {
  border-radius: var(--rounded-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  margin: 32px 0;
}
.article-content .img-wrap img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}
.article-content .img-caption {
  font-size: 13px;
  color: var(--muted);
  padding: 10px 16px;
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline);
}
.callout {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--rounded-md);
  padding: 20px 24px;
  margin: 28px 0;
}
.callout p { margin-bottom: 0; color: var(--body-strong); }
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.data-table th {
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 600;
  padding: 10px 16px;
  text-align: left;
  border: 1px solid var(--hairline);
}
.data-table td {
  padding: 10px 16px;
  border: 1px solid var(--hairline);
  color: var(--body);
  background: var(--surface-card);
}
.data-table tr:hover td { background: var(--canvas-soft); }
.code-note {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 20px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--ink);
  line-height: 1.5;
  overflow-x: auto;
  margin: 24px 0;
}

/* SIDEBAR */
.article-sidebar { position: sticky; top: 88px; }
.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
  margin-bottom: 20px;
}
.sidebar-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 11px;
}
.sidebar-card ul { list-style: none; }
.sidebar-card ul li {
  border-bottom: 1px solid var(--hairline-soft);
  padding: 8px 0;
}
.sidebar-card ul li:last-child { border-bottom: none; }
.sidebar-card ul li a { font-size: 14px; color: var(--body); }
.sidebar-card ul li a:hover { color: var(--ink); }
.sidebar-ref { font-size: 13px; color: var(--muted); line-height: 1.4; margin-bottom: 8px; }
.sidebar-ref a { color: var(--muted); text-decoration: underline; }

/* PAGE (about/privacy/terms) */
.page-hero {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--hairline);
}
.page-hero h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 12px;
}
.page-hero p { font-size: 16px; color: var(--body); }
.page-body { padding: 56px 0 80px; max-width: 760px; }
.page-body h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-top: 40px;
  margin-bottom: 16px;
}
.page-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 12px;
}
.page-body p { color: var(--body); margin-bottom: 16px; line-height: 1.6; }
.page-body ul { color: var(--body); padding-left: 24px; margin-bottom: 16px; }
.page-body li { margin-bottom: 6px; }

/* FOOTER */
.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 24px 48px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--hairline-soft);
  margin-bottom: 32px;
}
.footer-brand {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.footer-col p { font-size: 14px; color: var(--body); line-height: 1.5; }
.footer-heading {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.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 {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p { font-size: 14px; color: var(--muted); }
.footer-bottom a { color: var(--muted); }
.footer-bottom a:hover { color: var(--ink); }

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  z-index: 999;
  padding: 20px 24px;
}
.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cookie-inner p { font-size: 14px; color: var(--canvas); flex: 1; min-width: 200px; }
.cookie-inner a { color: var(--canvas); text-decoration: underline; }
.cookie-actions { display: flex; gap: 12px; flex-shrink: 0; }
.cookie-actions .btn-primary { background: var(--primary); color: var(--on-primary); }
.cookie-actions .btn-secondary {
  background: transparent;
  border-color: var(--canvas);
  color: var(--canvas);
}
.cookie-actions .btn-secondary:hover { background: rgba(255,255,255,0.1); }

/* DISCLAIMER */
.disclaimer {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: 16px 20px;
  font-size: 13px;
  color: var(--muted);
  margin: 32px 0;
  line-height: 1.5;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .info-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
  .hero h1 { font-size: 56px; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: var(--canvas); border-bottom: 1px solid var(--hairline); padding: 16px 0; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .article-grid { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 36px; letter-spacing: -1px; }
  .article-hero h1 { font-size: 32px; }
  .page-hero h1 { font-size: 32px; }
  .section-title { font-size: 28px; }
}

@media (max-width: 640px) {
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .hero { padding: 48px 0; }
  .hero-img-wrap img { height: 240px; }
  .form-wrap { padding: 24px; }
}