@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 {
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  background-color: var(--canvas);
  color: var(--body);
  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);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.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;
  list-style: none;
  gap: 32px;
}

.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-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
}

.nav-hamburger svg {
  width: 24px;
  height: 24px;
}

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

.hero-badge {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--rounded-pill);
  padding: 4px 12px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 72px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -2.16px;
  max-width: 900px;
  margin-bottom: 24px;
}

.hero p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 580px;
  margin-bottom: 40px;
}

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

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

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

.section-sub {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 560px;
  margin-bottom: 48px;
}

/* CARDS */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
}

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

.card-body {
  padding: 24px;
}

.card-tag {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  border-radius: var(--rounded-pill);
  padding: 4px 10px;
  margin-bottom: 12px;
}

.card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 8px;
}

.card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 16px;
}

.card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
  padding-bottom: 1px;
  transition: color 0.15s, border-color 0.15s;
}

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

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

/* FEATURE BAND */
.feature-band {
  background: var(--canvas-soft);
  padding: 80px 0;
}

.feature-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-split img {
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.feature-text h2 {
  font-size: 36px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.72px;
  line-height: 1.2;
  margin-bottom: 20px;
}

.feature-text p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  margin-bottom: 16px;
}

.feature-list {
  list-style: none;
  margin-top: 20px;
}

.feature-list li {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline-soft);
  display: flex;
  gap: 10px;
}

.feature-list li::before {
  content: "—";
  color: var(--muted);
  flex-shrink: 0;
}

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

.article-header h1 {
  font-size: 48px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -1.2px;
  line-height: 1.15;
  max-width: 760px;
  margin-bottom: 20px;
}

.article-meta {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

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

.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 64px;
  align-items: start;
}

.article-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  line-height: 1.25;
  margin: 40px 0 16px;
}

.article-content h2:first-child {
  margin-top: 0;
}

.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 12px;
}

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

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

.article-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 6px;
}

.article-content a {
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
  transition: color 0.15s, border-color 0.15s;
}

.article-content a:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.article-img {
  width: 100%;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  margin: 32px 0;
  max-height: 460px;
  object-fit: cover;
}

.article-caption {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
  margin-top: -20px;
  margin-bottom: 32px;
}

.article-sidebar {
  position: sticky;
  top: 84px;
}

.sidebar-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.sidebar-card ul {
  list-style: none;
  padding: 0;
}

.sidebar-card ul li {
  border-bottom: 1px solid var(--hairline-soft);
  padding: 8px 0;
}

.sidebar-card ul li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-card ul li a {
  font-size: 14px;
  color: var(--body);
}

.sidebar-card ul li a:hover {
  color: var(--ink);
}

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

.form-wrap {
  max-width: 560px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 8px;
}

.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;
  height: 44px;
  font-size: 16px;
  color: var(--ink);
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.form-group textarea {
  height: auto;
  resize: vertical;
  min-height: 120px;
}

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

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

.field-error {
  font-size: 13px;
  color: var(--semantic-error);
  margin-top: 4px;
  display: none;
}

.field-error.visible {
  display: block;
}

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

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

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

.form-success {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
  color: var(--semantic-success);
  font-size: 16px;
  margin-top: 16px;
}

.form-success.visible {
  display: block;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  margin-top: 12px;
  max-width: 280px;
}

.footer-col h5 {
  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 ul li {
  margin-bottom: 10px;
}

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

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

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

.footer-bottom p {
  font-size: 14px;
  color: var(--muted);
}

.footer-bottom a {
  font-size: 14px;
  color: var(--muted);
}

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

/* COOKIE BANNER */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 760px;
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  z-index: 9999;
  box-shadow: none;
}

.cookie-banner.hidden {
  display: none;
}

.cookie-banner p {
  font-size: 14px;
  color: var(--canvas-soft);
  line-height: 1.5;
}

.cookie-banner p a {
  color: var(--canvas);
  border-bottom: 1px solid rgba(247,247,244,0.4);
}

.cookie-banner p a:hover {
  color: var(--canvas);
  border-color: var(--canvas);
}

.cookie-actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}

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

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

.btn-cookie-reject {
  background: transparent;
  color: var(--canvas-soft);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid rgba(247,247,244,0.3);
  border-radius: var(--rounded-md);
  padding: 8px 16px;
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s, color 0.15s;
}

.btn-cookie-reject:hover {
  border-color: rgba(247,247,244,0.7);
  color: var(--canvas);
}

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

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

.page-header p {
  font-size: 16px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.5;
}

.page-content {
  padding: 56px 0 80px;
  max-width: 760px;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.325px;
  line-height: 1.25;
  margin: 40px 0 14px;
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 18px;
}

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

.page-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 6px;
}

.page-content a {
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
}

.page-content a:hover {
  color: var(--primary);
  border-color: var(--primary);
}

.update-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-soft);
}

/* BREADCRUMB */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  gap: 8px;
  align-items: center;
}

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

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

.breadcrumb span {
  color: var(--muted-soft);
}

/* LOADING SPINNER */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: var(--on-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.spinner.visible {
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 56px;
    letter-spacing: -1.4px;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-sidebar {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--canvas);
    border-bottom: 1px solid var(--hairline);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    border-bottom: 1px solid var(--hairline-soft);
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-hamburger {
    display: block;
  }

  .hero h1 {
    font-size: 36px;
    letter-spacing: -0.9px;
  }

  .section-title {
    font-size: 28px;
  }

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

  .article-header h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }

  .page-header h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .cookie-banner {
    flex-direction: column;
    align-items: flex-start;
    bottom: 16px;
    width: calc(100% - 32px);
  }

  .cookie-actions {
    width: 100%;
  }

  .btn-cookie-accept,
  .btn-cookie-reject {
    flex: 1;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 48px 0;
  }

  .section {
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 32px;
    letter-spacing: -0.5px;
  }
}