@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;
  height: 100%;
  gap: 0;
}
.nav-brand {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.nav-brand span { color: var(--primary); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 40px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  padding: 6px 12px;
  border-radius: var(--rounded-sm);
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--ink);
  background: var(--surface-strong);
}
.nav-spacer { flex: 1; }
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-direction: column;
  gap: 5px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.2s;
}

/* ---- HERO ---- */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--hairline-soft);
}
.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(--rounded-pill);
  padding: 4px 10px;
  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;
  font-weight: 400;
  line-height: 1.5;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 0;
}

/* ---- SECTIONS ---- */
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 32px;
}
.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);
  max-width: 600px;
  margin-bottom: 48px;
}

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

.card-grid { display: grid; gap: 20px; }
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }

.card-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}
.card-title {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin-bottom: 8px;
}
.card-title a { color: var(--ink); }
.card-title a:hover { color: var(--primary); }
.card-body {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 16px;
}
.card-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 12px;
}
.card-meta time { font-size: 13px; }

/* ---- ARTICLE CARD WITH IMAGE ---- */
.article-card { overflow: hidden; }
.article-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--rounded-md);
  margin-bottom: 20px;
  background: var(--surface-strong);
}

/* ---- FEATURED ARTICLE ---- */
.featured-article {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin-bottom: 40px;
}
.featured-article-img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  display: block;
}
.featured-article-body {
  padding: 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.featured-article-body .card-title {
  font-size: 26px;
  letter-spacing: -0.325px;
  margin-bottom: 12px;
}
.featured-article-body .card-body {
  font-size: 15px;
  flex: 1;
}

/* ---- BADGE PILL ---- */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  background: var(--surface-strong);
  color: var(--ink);
  border-radius: var(--rounded-pill);
  padding: 4px 10px;
}
.badge-primary {
  background: var(--primary);
  color: var(--on-primary);
}

/* ---- READ MORE LINK ---- */
.read-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 1px;
  transition: border-color 0.15s, color 0.15s;
}
.read-link:hover { color: var(--primary); border-color: var(--primary); }

/* ---- ARTICLE PAGE ---- */
.article-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline-soft);
}
.article-header .badge { margin-bottom: 20px; }
.article-header h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: 20px;
}
.article-header-meta {
  font-size: 14px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}
.article-header-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  margin-top: 32px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  padding: 48px 0 80px;
  align-items: start;
}
.article-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 40px 0 16px;
}
.article-content h3 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.11px;
  color: var(--ink);
  margin: 28px 0 12px;
}
.article-content p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 20px;
}
.article-content ul, .article-content ol {
  margin: 0 0 20px 20px;
  color: var(--body);
}
.article-content li {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 6px;
}
.article-content a { color: var(--primary); }
.article-content a:hover { color: var(--primary-active); }

.info-box {
  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;
}
.info-box p { margin: 0; font-size: 15px; color: var(--body); }

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.data-table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--canvas-soft);
  color: var(--ink);
  font-weight: 600;
  font-size: 13px;
  border-bottom: 1px solid var(--hairline);
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline-soft);
  color: var(--body);
}
.data-table tr:last-child td { border-bottom: none; }

.code-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 20px;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 13px;
  color: var(--ink);
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.5;
}

/* ---- SIDEBAR ---- */
.sidebar {}
.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: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.sidebar-links { list-style: none; }
.sidebar-links li { margin-bottom: 8px; }
.sidebar-links a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
}
.sidebar-links a:hover { color: var(--primary); }

.tool-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-pill);
  padding: 6px 12px;
  font-size: 13px;
  color: var(--body);
  margin: 4px 4px 4px 0;
}
.tool-pill img { width: 16px; height: 16px; object-fit: contain; }

/* ---- DIVIDER ---- */
.divider {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 48px 0;
}

/* ---- CONTACT FORM ---- */
.form-section {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 40px;
  max-width: 640px;
}
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  transition: border-color 0.15s;
  outline: none;
}
.form-input:focus { border-color: var(--ink); }
.form-input::placeholder { color: var(--muted-soft); }
.form-submit {
  background: var(--ink);
  color: var(--canvas);
  border: none;
  border-radius: var(--rounded-md);
  padding: 12px 20px;
  height: 44px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s;
}
.form-submit:hover { background: #3d3c34; }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.form-notice {
  font-size: 13px;
  color: var(--muted);
  margin-top: 12px;
}
.form-success {
  display: none;
  background: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: 16px 20px;
  font-size: 14px;
  color: var(--semantic-success);
  margin-top: 16px;
}

/* ---- COOKIE BANNER ---- */
#cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  max-width: 560px;
  width: calc(100% - 48px);
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 4px 24px rgba(38,37,30,0.18);
}
#cookie-banner p {
  font-size: 13px;
  color: var(--canvas);
  flex: 1;
  margin: 0;
}
#cookie-banner a { color: var(--canvas); text-decoration: underline; }
.cookie-btns { display: flex; gap: 8px; flex-shrink: 0; }
.btn-cookie-accept {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
}
.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: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
}

/* ---- TOPICS STRIP ---- */
.topics-strip {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 24px 0;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 64px;
}
.topic-pill {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-pill);
  padding: 6px 14px;
  font-size: 13px;
  color: var(--body);
  transition: border-color 0.15s, color 0.15s;
}
.topic-pill:hover { border-color: var(--ink); color: var(--ink); }

/* ---- PAGE HERO (inner pages) ---- */
.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline-soft);
}
.page-hero h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
}

/* ---- PAGE CONTENT ---- */
.page-content {
  padding: 48px 0 80px;
  max-width: 760px;
}
.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--ink);
  margin: 40px 0 14px;
}
.page-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}
.page-content p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 18px;
}
.page-content ul {
  margin: 0 0 18px 20px;
  color: var(--body);
}
.page-content li {
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 6px;
}
.page-content a { color: var(--primary); }

/* ---- 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 p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  max-width: 240px;
  margin-top: 12px;
}
.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 16px;
  letter-spacing: 0.2px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
  font-size: 14px;
  color: var(--body);
}
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-soft);
}
.footer-bottom p { font-size: 13px; color: var(--muted); }
.footer-disclaimer {
  font-size: 12px;
  color: var(--muted-soft);
  max-width: 600px;
  line-height: 1.5;
  margin-top: 8px;
}

/* ---- UPDATED DATE ---- */
.updated-meta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted-soft);
  margin-top: 4px;
}

/* ---- SCHEMA INVISIBLE ---- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 56px; letter-spacing: -1.5px; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    padding: 12px 24px 20px;
    gap: 2px;
  }
  .top-nav { position: relative; }
  .hero h1 { font-size: 36px; letter-spacing: -0.9px; }
  .hero { padding: 48px 0 40px; }
  .article-header h1 { font-size: 32px; letter-spacing: -0.7px; }
  .section { padding: 48px 0; }
  .card-grid-2, .card-grid-3 { grid-template-columns: 1fr; }
  .featured-article { grid-template-columns: 1fr; }
  .featured-article-img { min-height: 220px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .page-hero h1 { font-size: 32px; letter-spacing: -0.7px; }
  .form-section { padding: 24px; }
  #cookie-banner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; letter-spacing: -0.5px; }
  .article-header h1 { font-size: 26px; }
  .section-title { font-size: 26px; }
}