*, *::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;
  --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 { 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);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}
.nav-logo 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-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

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

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

.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);
  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: 16px;
}

.hero-updated {
  font-size: 13px;
  color: var(--muted);
}

/* SECTION */
.section { padding: 80px 0; }
.section-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

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

.section-desc {
  font-size: 16px;
  color: var(--body);
  max-width: 640px;
  line-height: 1.5;
  margin-bottom: 48px;
}

/* CARD GRID */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--hairline-strong); }

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

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 12px;
}

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

.feature-card .card-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}
.feature-card .card-link:hover { color: var(--primary-active); }

/* ARTICLE GRID (2-up) */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

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

.article-card-meta {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}

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

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

.article-card-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

/* ARTICLE PAGE */
.article-page { padding: 60px 0 80px; }
.article-page-inner { max-width: 760px; margin: 0 auto; padding: 0 24px; }

.article-page-meta {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}

.article-page h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 20px;
}

.article-page .lead {
  font-size: 18px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 40px;
  border-left: 3px solid var(--primary);
  padding-left: 20px;
}

.article-page h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 48px 0 16px;
}

.article-page h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 12px;
}

.article-page p { font-size: 16px; color: var(--body); line-height: 1.6; margin-bottom: 20px; }

.article-page ul, .article-page ol {
  margin: 0 0 20px 24px;
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
}
.article-page li { margin-bottom: 6px; }

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

.article-img-caption {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: -24px;
  margin-bottom: 32px;
}

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

.code-block {
  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);
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.5;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 24px 0;
}
.data-table th {
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 600;
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--hairline-strong);
}
.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--body);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--canvas-soft); }

/* BREADCRUMB */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
  max-width: 760px;
  margin: 0 auto;
  padding-left: 24px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 6px; }

/* DIVIDER */
.divider { height: 1px; background: var(--hairline); margin: 0; }

/* RELATED ARTICLES */
.related-section { padding: 60px 0; background: var(--canvas-soft); border-top: 1px solid var(--hairline); }
.related-section .section-inner { max-width: 760px; }

/* CONTACT FORM */
.contact-section { padding: 80px 0; }
.contact-inner { max-width: 600px; margin: 0 auto; padding: 0 24px; }

.form-title {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin-bottom: 8px;
}
.form-desc { font-size: 14px; color: var(--body); margin-bottom: 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(--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;
  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); }

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  height: 40px;
  cursor: pointer;
  transition: background 0.15s;
  line-height: 1;
}
.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-message {
  margin-top: 16px;
  font-size: 14px;
  padding: 12px 16px;
  border-radius: var(--rounded-md);
  display: none;
}
.form-message.success {
  background: #edf7f3;
  color: var(--semantic-success);
  border: 1px solid #b8e4d2;
  display: block;
}
.form-message.error {
  background: #fdf0f3;
  color: var(--semantic-error);
  border: 1px solid #f0b8c6;
  display: block;
}

/* PAGE (about, privacy, terms) */
.page-content { padding: 60px 0 80px; }
.page-inner { max-width: 760px; margin: 0 auto; padding: 0 24px; }

.page-inner h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 32px;
  line-height: 1.15;
}
.page-inner h2 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin: 40px 0 12px;
}
.page-inner p { font-size: 16px; color: var(--body); line-height: 1.6; margin-bottom: 20px; }
.page-inner ul { margin: 0 0 20px 24px; font-size: 16px; color: var(--body); line-height: 1.6; }
.page-inner li { margin-bottom: 6px; }
.page-inner a { color: var(--primary); }

.page-updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 40px;
}

/* 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;
  gap: 40px;
  margin-bottom: 48px;
}

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

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

.footer-heading {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--muted);
}

/* COOKIE */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px 24px;
}
.cookie-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 1200px;
  width: 100%;
  flex-wrap: wrap;
}
.cookie-inner p { font-size: 14px; color: var(--canvas); flex: 1; }
.cookie-inner a { color: var(--canvas); text-decoration: underline; }
.cookie-buttons { display: flex; gap: 12px; }
.btn-cookie-accept {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.btn-cookie-accept:hover { background: var(--primary-active); }
.btn-cookie-reject {
  background: transparent;
  color: var(--canvas);
  border: 1px solid rgba(247,247,244,0.3);
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.btn-cookie-reject:hover { border-color: var(--canvas); }

/* DISCLAIMER */
.disclaimer {
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  margin: 24px 0 0;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero h1 { font-size: 56px; letter-spacing: -1.4px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 36px; letter-spacing: -0.8px; }
  .section-title { font-size: 28px; }
  .article-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .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 24px; gap: 16px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .article-page h1 { font-size: 36px; }
  .page-inner h1 { font-size: 36px; }
}

@media (max-width: 640px) {
  .hero { padding: 48px 0; }
  .hero h1 { font-size: 32px; letter-spacing: -0.5px; }
  .section { padding: 48px 0; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}