@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400&display=swap');

:root {
  --color-canvas: #f7f7f4;
  --color-canvas-soft: #fafaf7;
  --color-surface-card: #ffffff;
  --color-surface-strong: #e6e5e0;
  --color-primary: #f54e00;
  --color-primary-active: #d04200;
  --color-ink: #26251e;
  --color-body: #5a5852;
  --color-body-strong: #26251e;
  --color-muted: #807d72;
  --color-muted-soft: #a09c92;
  --color-on-primary: #ffffff;
  --color-hairline: #e6e5e0;
  --color-hairline-soft: #efeee8;
  --color-hairline-strong: #cfcdc4;
  --color-semantic-success: #1f8a65;
  --color-semantic-error: #cf2d56;
  --font-sans: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-pill: 9999px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-canvas);
  color: var(--color-body);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-ink);
  text-decoration: none;
}

a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* NAV */
.site-nav {
  background-color: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-body);
  line-height: 1.4;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--color-ink);
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: all 0.2s;
}

.nav-mobile {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
  padding: 16px 24px 20px;
  z-index: 99;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav-mobile ul a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-body);
}

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

.hero-band h1 {
  font-family: var(--font-sans);
  font-size: 64px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--color-ink);
  max-width: 760px;
  margin-bottom: 20px;
}

.hero-band p {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-body);
  max-width: 560px;
  margin-bottom: 32px;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  background: var(--color-surface-strong);
  color: var(--color-ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--rounded-pill);
  padding: 4px 10px;
  margin-bottom: 20px;
}

/* SECTION */
.section {
  padding: 80px 0;
}

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

.section h2 {
  font-size: 36px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.section-intro {
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-body);
  max-width: 620px;
  margin-bottom: 48px;
}

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

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

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

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

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

.feature-card .card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--rounded-md);
  margin-bottom: 16px;
}

/* ARTICLE CARD */
.article-card {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  border-color: var(--color-hairline-strong);
}

.article-card-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.article-card-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-meta {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 8px;
}

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

.article-card p {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  flex: 1;
}

.article-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.article-link:hover {
  color: var(--color-primary-active);
  border-color: var(--color-primary-active);
}

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

/* SECTION ALT BG */
.section-alt {
  background: var(--color-surface-card);
}

/* ARTICLE PAGE */
.article-header {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--color-hairline);
}

.article-header .breadcrumb {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.article-header .breadcrumb a {
  color: var(--color-muted);
}

.article-header .breadcrumb a:hover {
  color: var(--color-ink);
}

.article-header h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--color-ink);
  max-width: 800px;
  margin-bottom: 16px;
}

.article-header .article-meta {
  font-size: 13px;
  color: var(--color-muted);
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.article-body {
  padding: 48px 0 80px;
}

.article-content {
  max-width: 740px;
}

.article-content p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-body);
  margin-bottom: 20px;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.5px;
  color: var(--color-ink);
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 28px 0 12px;
}

.article-content ul, .article-content ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.article-content li {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-body);
  margin-bottom: 6px;
}

.article-content .article-img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  margin: 32px 0;
}

.article-content blockquote {
  border-left: 3px solid var(--color-primary);
  padding: 12px 20px;
  margin: 24px 0;
  background: var(--color-canvas-soft);
  border-radius: 0 var(--rounded-md) var(--rounded-md) 0;
}

.article-content blockquote p {
  font-size: 16px;
  font-style: italic;
  color: var(--color-ink);
  margin: 0;
}

.article-content .ref-link {
  color: var(--color-primary);
  font-size: 14px;
}

.article-content .ref-link:hover {
  color: var(--color-primary-active);
}

.info-box {
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 20px 24px;
  margin: 28px 0;
}

.info-box h4 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.info-box p, .info-box li {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
}

/* FORM */
.contact-section {
  background: var(--color-canvas);
  padding: 80px 0;
}

.contact-form-wrap {
  max-width: 560px;
  margin: 0 auto;
  background: var(--color-surface-card);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-lg);
  padding: 40px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--color-canvas-soft);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 16px;
  color: var(--color-ink);
  height: 44px;
  transition: border-color 0.15s;
  outline: none;
}

.form-group textarea {
  height: auto;
  min-height: 110px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-ink);
}

.form-group input.error,
.form-group textarea.error {
  border-color: var(--color-semantic-error);
}

.form-group .error-msg {
  font-size: 12px;
  color: var(--color-semantic-error);
  margin-top: 4px;
  display: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  border-radius: var(--rounded-md);
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  height: 40px;
  cursor: pointer;
  transition: background 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  background: var(--color-primary-active);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--rounded-md);
  font-size: 14px;
  display: none;
}

.form-status.success {
  background: #e8f5f0;
  color: var(--color-semantic-success);
  border: 1px solid #b3dece;
  display: block;
}

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-ink);
  color: var(--color-canvas);
  padding: 16px 24px;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 14px;
}

.cookie-banner p {
  color: var(--color-canvas-soft);
  line-height: 1.5;
  max-width: 640px;
}

.cookie-banner a {
  color: var(--color-canvas);
  text-decoration: underline;
}

.cookie-banner-btns {
  display: flex;
  gap: 10px;
  flex-shrink: 0;
}

.btn-cookie-accept {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-cookie-accept:hover {
  background: var(--color-primary-active);
}

.btn-cookie-reject {
  background: transparent;
  color: var(--color-canvas-soft);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s;
}

.btn-cookie-reject:hover {
  border-color: rgba(255,255,255,0.6);
}

/* FOOTER */
.site-footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-hairline);
  padding: 48px 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.5;
  max-width: 260px;
  margin-top: 10px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--color-ink);
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul a {
  font-size: 14px;
  color: var(--color-body);
  transition: color 0.15s;
}

.footer-col ul a:hover {
  color: var(--color-ink);
}

.footer-bottom {
  border-top: 1px solid var(--color-hairline-soft);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-muted);
}

.footer-disclaimer {
  font-size: 12px;
  color: var(--color-muted-soft);
  line-height: 1.5;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-hairline-soft);
}

/* PAGE HERO */
.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--color-hairline);
}

.page-hero h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--color-ink);
  line-height: 1.15;
  margin-bottom: 12px;
}

.page-hero p {
  font-size: 16px;
  color: var(--color-body);
  max-width: 560px;
}

/* PROSE */
.prose {
  max-width: 740px;
  padding: 48px 0 80px;
}

.prose h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.325px;
  color: var(--color-ink);
  margin: 36px 0 14px;
}

.prose h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
  margin: 24px 0 10px;
}

.prose p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-body);
  margin-bottom: 18px;
}

.prose ul, .prose ol {
  padding-left: 24px;
  margin-bottom: 18px;
}

.prose li {
  font-size: 16px;
  line-height: 1.65;
  color: var(--color-body);
  margin-bottom: 6px;
}

.prose a {
  color: var(--color-primary);
}

.prose a:hover {
  color: var(--color-primary-active);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero-band h1 { font-size: 52px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero-band { padding: 48px 0; }
  .hero-band h1 { font-size: 36px; letter-spacing: -0.8px; }

  .section { padding: 56px 0; }
  .section h2 { font-size: 28px; }

  .card-grid { grid-template-columns: 1fr; }
  .card-grid-2 { grid-template-columns: 1fr; }

  .article-header h1 { font-size: 32px; }

  .footer-grid { grid-template-columns: 1fr 1fr; }

  .cookie-banner { flex-direction: column; align-items: flex-start; gap: 12px; }

  .contact-form-wrap { padding: 24px 20px; }

  .page-hero h1 { font-size: 32px; }
}

@media (max-width: 640px) {
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* RELATED SECTION */
.related-section {
  border-top: 1px solid var(--color-hairline);
  padding: 48px 0;
  background: var(--color-canvas-soft);
}

.related-section h2 {
  font-size: 22px;
  font-weight: 400;
  color: var(--color-ink);
  letter-spacing: -0.3px;
  margin-bottom: 24px;
}

/* UPDATE DATE */
.update-date {
  font-size: 13px;
  color: var(--color-muted-soft);
  font-style: italic;
}