@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;
  --primary: #f54e00;
  --primary-active: #d04200;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --section: 80px;
}

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

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;
  font-weight: 400;
  line-height: 1.5;
}

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;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5 {
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -0.02em;
}
h1 { font-size: 48px; line-height: 1.1; letter-spacing: -0.045em; }
h2 { font-size: 36px; line-height: 1.2; letter-spacing: -0.02em; }
h3 { font-size: 26px; line-height: 1.25; letter-spacing: -0.013em; }
h4 { font-size: 22px; line-height: 1.3; letter-spacing: -0.005em; }
h5 { font-size: 18px; font-weight: 600; line-height: 1.4; letter-spacing: 0; }
p { color: var(--body); line-height: 1.6; }

.caption {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}
.caption-uppercase {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  color: var(--muted);
}

/* NAV */
.site-nav {
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-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: -0.02em;
}
.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(--body);
  transition: color 0.15s;
}
.nav-links a:hover { color: var(--ink); }
.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;
}
.mobile-menu {
  display: none;
  background: var(--canvas);
  border-bottom: 1px solid var(--hairline);
  padding: 16px 24px;
}
.mobile-menu.open { display: block; }
.mobile-menu ul { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.mobile-menu a { font-size: 15px; font-weight: 500; color: var(--ink); }

/* HERO */
.hero {
  padding: 72px 0 80px;
  border-bottom: 1px solid var(--hairline);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 9999px;
  padding: 4px 12px;
  margin-bottom: 20px;
}
.hero h1 { margin-bottom: 20px; }
.hero p {
  font-size: 17px;
  color: var(--body);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-img {
  border-radius: var(--rounded-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  aspect-ratio: 4/3;
  object-fit: cover;
  width: 100%;
}

/* BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--rounded-md);
  padding: 10px 18px;
  height: 40px;
  cursor: pointer;
  border: none;
  transition: background 0.15s;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }
.btn-secondary {
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
}
.btn-secondary:hover { background: var(--canvas-soft); color: var(--ink); }
.btn-download {
  background: var(--ink);
  color: var(--canvas);
  padding: 12px 20px;
  height: 44px;
}
.btn-download:hover { background: #3a3930; color: var(--canvas); }

/* SECTION */
.section { padding: var(--section) 0; }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}
.section-title {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  margin-bottom: 48px;
}
.section-divider { border: none; border-top: 1px solid var(--hairline); margin: 0; }

/* 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;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card h5 { color: var(--ink); margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--body); }
.card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--rounded-sm);
  background: var(--surface-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--rounded-md);
  margin-bottom: 20px;
  border: 1px solid var(--hairline-soft);
}

/* ARTICLE CARD */
.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  transition: border-color 0.15s;
  display: flex;
  flex-direction: column;
}
.article-card:hover { border-color: var(--hairline-strong); }
.article-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.article-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.tag-pill {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  background: var(--surface-strong);
  color: var(--ink);
  border-radius: 9999px;
  padding: 3px 10px;
}
.article-card h5 { margin-bottom: 10px; font-size: 17px; }
.article-card p { font-size: 14px; color: var(--body); flex: 1; }
.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline-soft);
}
.read-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
}
.read-link:hover { color: var(--primary-active); }

/* ARTICLE PAGE */
.article-hero {
  padding: 48px 0 0;
}
.article-hero-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 300px;
  gap: 48px;
  padding: 48px 0 var(--section);
  align-items: start;
}
.article-body h2 { font-size: 26px; margin: 40px 0 16px; color: var(--ink); }
.article-body h3 { font-size: 20px; margin: 32px 0 12px; color: var(--ink); font-weight: 500; }
.article-body p { margin-bottom: 18px; color: var(--body); line-height: 1.7; }
.article-body ul, .article-body ol { margin: 0 0 18px 20px; color: var(--body); line-height: 1.7; }
.article-body li { margin-bottom: 6px; }
.article-body a { color: var(--primary); }
.article-body a:hover { color: var(--primary-active); }
.article-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 12px 20px;
  margin: 24px 0;
  background: var(--canvas-soft);
  border-radius: 0 var(--rounded-sm) var(--rounded-sm) 0;
  color: var(--body-strong);
  font-size: 16px;
  line-height: 1.6;
}
.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 h5 { font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 16px; }
.sidebar-card ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.sidebar-card li a { font-size: 14px; color: var(--body); border-bottom: 1px solid var(--hairline-soft); padding-bottom: 10px; display: block; }
.sidebar-card li:last-child a { border-bottom: none; padding-bottom: 0; }
.sidebar-card li a:hover { color: var(--ink); }

/* FORM */
.form-section { padding: var(--section) 0; background: var(--canvas-soft); }
.form-wrap {
  max-width: 600px;
  margin: 0 auto;
}
.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,
.form-group select {
  width: 100%;
  background: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  height: 44px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.15s;
}
.form-group textarea { height: auto; min-height: 120px; resize: vertical; }
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--ink);
}
.form-group input.invalid,
.form-group textarea.invalid { border-color: var(--error); }
.form-error { font-size: 12px; color: var(--error); margin-top: 4px; display: none; }
.form-error.show { display: block; }
.form-message {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-md);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--success);
  display: none;
  margin-top: 16px;
}
.form-message.show { display: block; }
.btn-loading { opacity: 0.7; pointer-events: none; }

/* COOKIE BANNER */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--ink);
  color: var(--canvas);
  padding: 16px 24px;
  z-index: 999;
  display: none;
}
#cookie-banner.show { display: block; }
.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.cookie-inner p { font-size: 14px; color: #d4d3cf; margin: 0; }
.cookie-inner a { color: var(--canvas); text-decoration: underline; }
.cookie-buttons { display: flex; gap: 10px; 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: 14px;
  font-weight: 500;
  cursor: pointer;
}
.btn-cookie-accept:hover { background: var(--primary-active); }
.btn-cookie-reject {
  background: transparent;
  color: var(--muted-soft);
  border: 1px solid #3a3930;
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.btn-cookie-reject:hover { color: var(--canvas); border-color: #5a5852; }

/* BREADCRUMB */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline-soft);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb-sep { color: var(--muted-soft); }

/* FOOTER */
.site-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: 32px;
  margin-bottom: 48px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--body);
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.6;
}
.footer-col h6 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.088em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.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-bottom .updated { font-size: 12px; color: var(--muted-soft); }

/* PAGE HEADER */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}
.page-header h1 { font-size: 40px; margin-bottom: 12px; }
.page-header p { color: var(--body); font-size: 16px; }
.page-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--section) 0;
}
.page-content h2 { font-size: 24px; margin: 36px 0 14px; color: var(--ink); font-weight: 500; }
.page-content h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); font-weight: 500; }
.page-content p { margin-bottom: 16px; color: var(--body); line-height: 1.7; }
.page-content ul, .page-content ol { margin: 0 0 16px 20px; color: var(--body); line-height: 1.7; }
.page-content li { margin-bottom: 6px; }
.page-content a { color: var(--primary); }
.page-content a:hover { color: var(--primary-active); }

/* 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: 24px 0;
  line-height: 1.6;
}

/* INFO BOX */
.info-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.info-box p { font-size: 14px; color: var(--body); margin: 0; }

/* TABLE */
.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-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); }
.table-wrap { overflow-x: auto; border: 1px solid var(--hairline); border-radius: var(--rounded-md); }

/* RESPONSIVE */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .hero-inner { gap: 40px; }
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; }
}
@media (max-width: 768px) {
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  h3 { font-size: 22px; }
  .section-title { font-size: 28px; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero { padding: 40px 0 48px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero p { max-width: 100%; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-card-footer { flex-direction: column; align-items: flex-start; gap: 8px; }
}