@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;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --success: #1f8a65;
  --error: #cf2d56;
}

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;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--ink); }
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;
}
.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--primary); }
.nav-links {
  display: flex;
  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, .nav-links a.active { 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;
}

/* HERO */
.hero-band {
  padding: 80px 0;
  background: var(--canvas);
}
.hero-inner {
  max-width: 760px;
}
.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: 9999px;
  margin-bottom: 24px;
}
.hero-band h1 {
  font-size: 64px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  margin-bottom: 24px;
}
.hero-band .hero-sub {
  font-size: 18px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 40px;
  max-width: 560px;
}
.hero-image {
  margin-top: 56px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--hairline);
}
.hero-image img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}

/* SECTIONS */
.section { padding: 80px 0; }
.section-alt { background: var(--surface-card); }
.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-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.5;
  margin-bottom: 48px;
}

/* CARD GRID */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }

.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--hairline-strong); }
.feature-card .card-icon {
  font-size: 28px;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
}

/* ARTICLE CARDS */
.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  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%;
  height: 200px;
  object-fit: cover;
}
.article-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.article-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}
.article-card-body h3 {
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.1px;
}
.article-card-body p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 20px;
}
.article-meta {
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--hairline-soft);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
}
.read-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

/* ARTICLE PAGE */
.article-hero { padding: 64px 0 0; }
.article-hero h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 20px;
  max-width: 800px;
}
.article-hero .article-meta-bar {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 32px;
  align-items: center;
}
.article-hero .article-meta-bar span { display: flex; align-items: center; gap: 6px; }
.article-hero-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--hairline);
  margin-bottom: 64px;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px 80px;
}
.article-body h2 {
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.3px;
  color: var(--ink);
  margin: 48px 0 16px;
  line-height: 1.25;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 12px;
}
.article-body p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 20px;
}
.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-body li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 8px;
}
.article-body a {
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
}
.article-body a:hover { border-color: var(--ink); }

.info-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  padding: 20px 24px;
  margin: 32px 0;
}
.info-box p { margin: 0; font-size: 15px; }

.step-list { list-style: none; padding: 0; counter-reset: steps; }
.step-list li {
  counter-increment: steps;
  display: flex;
  gap: 16px;
  margin-bottom: 20px;
  align-items: flex-start;
}
.step-list li::before {
  content: counter(steps);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--canvas);
  font-size: 13px;
  font-weight: 600;
  margin-top: 2px;
}

.code-block {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 20px;
  margin: 24px 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--ink);
  overflow-x: auto;
  line-height: 1.5;
}

/* TABLE */
.data-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.data-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline);
}
.data-table td {
  font-size: 14px;
  color: var(--body);
  padding: 12px 16px;
  border-bottom: 1px solid var(--hairline-soft);
}
.data-table tr:last-child td { border-bottom: none; }

/* FORM */
.contact-form-wrap {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 40px;
  max-width: 600px;
}
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
  letter-spacing: 0.01em;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--canvas-soft);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  height: 44px;
  font-size: 16px;
  color: var(--ink);
  font-family: inherit;
  transition: border-color 0.15s;
  outline: none;
}
.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(--error); }
.field-error {
  font-size: 12px;
  color: var(--error);
  margin-top: 6px;
  display: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
  font-family: inherit;
}
.btn-primary:hover { background: var(--primary-active); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-message {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-top: 16px;
  display: none;
}
.form-message.success {
  background: #e8f5f0;
  color: var(--success);
  border: 1px solid #b5ddd0;
}

/* RELATED ARTICLES */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* FOOTER */
.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 48px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer-brand h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.footer-brand h2 span { color: var(--primary); }
.footer-brand p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 14px;
  color: var(--body);
  transition: color 0.15s;
}
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--muted);
}

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 24px;
  right: 24px;
  max-width: 520px;
  background: var(--ink);
  color: var(--canvas);
  border-radius: 12px;
  padding: 20px 24px;
  z-index: 999;
  display: none;
  box-shadow: 0 8px 24px rgba(38,37,30,0.18);
}
.cookie-banner p {
  font-size: 14px;
  color: #e0dfd8;
  line-height: 1.55;
  margin-bottom: 16px;
}
.cookie-banner a { color: var(--canvas); border-bottom: 1px solid rgba(255,255,255,0.3); }
.cookie-actions { display: flex; gap: 10px; }
.btn-cookie-accept {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}
.btn-cookie-reject {
  background: transparent;
  color: #e0dfd8;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

/* PAGE HEADER */
.page-header {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--hairline);
}
.page-header h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 16px;
}
.page-header p {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.6;
}
.page-content {
  padding: 64px 0 80px;
  max-width: 800px;
}
.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  margin: 40px 0 14px;
  letter-spacing: -0.3px;
}
.page-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 18px;
}
.page-content ul { padding-left: 22px; margin-bottom: 18px; }
.page-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.65;
  margin-bottom: 6px;
}

/* BREADCRUMB */
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  padding: 20px 0 0;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb-sep { color: var(--hairline-strong); }

/* DISCLAIMER */
.disclaimer-bar {
  background: var(--surface-strong);
  padding: 10px 0;
  text-align: center;
}
.disclaimer-bar p {
  font-size: 12px;
  color: var(--muted);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 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: 16px 24px 24px;
    gap: 16px;
  }
  .hero-band h1 { font-size: 40px; letter-spacing: -0.8px; }
  .hero-band { padding: 48px 0; }
  .hero-image img { height: 240px; }
  .section-title { font-size: 28px; }
  .article-hero h1 { font-size: 32px; }
  .card-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .contact-form-wrap { padding: 24px; }
  .cookie-banner { left: 12px; right: 12px; bottom: 12px; }
  .page-header h1 { font-size: 32px; }
}
@media (max-width: 640px) {
  .hero-band h1 { font-size: 32px; }
  .card-grid-2 { grid-template-columns: 1fr; }
}