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

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

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;
}

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

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

.site-logo {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
  text-decoration: none;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.site-nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--body);
  text-decoration: none;
  transition: color 0.15s;
}

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

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

.nav-toggle svg {
  display: block;
}

.site-footer {
  background-color: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 48px 0 32px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  max-width: 280px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--ink);
  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);
  text-decoration: none;
  transition: color 0.15s;
}

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

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

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

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

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

.hero-band {
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}

.hero-label {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background-color: var(--surface-strong);
  padding: 4px 10px;
  border-radius: 9999px;
  margin-bottom: 24px;
}

.hero-band h1 {
  font-size: 56px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--ink);
  max-width: 800px;
  margin-bottom: 24px;
}

.hero-band p {
  font-size: 18px;
  color: var(--body);
  max-width: 560px;
  line-height: 1.6;
  margin-bottom: 16px;
}

.hero-meta {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 0;
}

.section {
  padding: 80px 0;
}

.section-label {
  display: inline-block;
  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: 1.6;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.article-card {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.15s;
}

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

.article-card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-card-image-placeholder {
  width: 100%;
  height: 200px;
  background-color: var(--surface-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
}

.article-card-body {
  padding: 24px;
}

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

.article-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 12px;
}

.article-card-excerpt {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 16px;
}

.article-card-meta {
  font-size: 13px;
  color: var(--muted);
}

.article-card-link {
  display: block;
  text-decoration: none;
}

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

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.info-card {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
}

.info-card-icon {
  width: 40px;
  height: 40px;
  background-color: var(--surface-strong);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

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

.info-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}

.contact-section {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 48px;
  margin-top: 48px;
}

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

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

.contact-info p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 24px;
}

.contact-detail {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.contact-detail-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  min-width: 80px;
}

.contact-detail-value {
  font-size: 14px;
  color: var(--body);
}

.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 {
  width: 100%;
  background-color: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s;
  height: 44px;
}

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

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

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--muted-soft);
}

.btn-primary {
  background-color: var(--ink);
  color: var(--canvas);
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color 0.15s;
}

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

.form-message {
  display: none;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-top: 16px;
}

.form-message.success {
  background-color: #e6f4ef;
  color: var(--semantic-success);
  border: 1px solid #b8dfd3;
}

.form-loading {
  display: none;
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

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

.breadcrumb-sep {
  color: var(--hairline-strong);
}

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

.article-page-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 64px;
  align-items: start;
}

.article-header {
  margin-bottom: 48px;
}

.article-header .category-pill {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--primary);
  background-color: #fff0eb;
  padding: 4px 10px;
  border-radius: 9999px;
  margin-bottom: 16px;
}

.article-header h1 {
  font-size: 42px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 20px;
}

.article-header-meta {
  font-size: 14px;
  color: var(--muted);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.article-featured-img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 40px;
  border: 1px solid var(--hairline);
}

.article-body h2 {
  font-size: 28px;
  font-weight: 400;
  letter-spacing: -0.5px;
  color: var(--ink);
  margin-top: 48px;
  margin-bottom: 16px;
  line-height: 1.25;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 32px;
  margin-bottom: 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: 1.7;
  margin-bottom: 8px;
}

.article-body a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.info-box {
  background-color: 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 h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.info-box p,
.info-box li {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 14px;
}

.data-table th {
  background-color: var(--surface-strong);
  color: var(--ink);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--hairline-strong);
}

.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;
}

.data-table-wrap {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  overflow: hidden;
  margin: 32px 0;
}

.article-sidebar {
  position: sticky;
  top: 80px;
}

.sidebar-widget {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-widget h3 {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}

.sidebar-widget ul {
  list-style: none;
}

.sidebar-widget ul li {
  padding: 10px 0;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 14px;
}

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

.sidebar-widget ul li a {
  color: var(--body);
  text-decoration: none;
  line-height: 1.5;
  display: block;
}

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

.toc-list {
  list-style: none;
  padding: 0;
}

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

.toc-list li:last-child {
  border-bottom: none;
}

.toc-list a {
  font-size: 14px;
  color: var(--body);
  text-decoration: none;
}

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

.page-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--hairline);
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: 42px;
  font-weight: 400;
  letter-spacing: -1px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 16px;
  color: var(--muted);
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  letter-spacing: -0.3px;
  color: var(--ink);
  margin-top: 40px;
  margin-bottom: 16px;
}

.page-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-top: 28px;
  margin-bottom: 10px;
}

.page-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 16px;
}

.page-content ul,
.page-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.page-content li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 6px;
}

.page-content a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.updated-date {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--surface-card);
  border-top: 1px solid var(--hairline);
  padding: 20px 24px;
  z-index: 999;
  display: none;
}

.cookie-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cookie-text {
  font-size: 14px;
  color: var(--body);
  flex: 1;
  min-width: 200px;
}

.cookie-text a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.btn-accept {
  background-color: var(--ink);
  color: var(--canvas);
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  height: 40px;
  transition: background-color 0.15s;
}

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

.btn-reject {
  background-color: transparent;
  color: var(--body);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  height: 40px;
  transition: all 0.15s;
}

.btn-reject:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}

.about-hero h1 {
  font-size: 48px;
  font-weight: 400;
  letter-spacing: -1.2px;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 24px;
}

.about-hero p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 16px;
}

.about-img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--hairline);
}

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

@media (max-width: 1024px) {
  .hero-band h1 {
    font-size: 44px;
  }

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

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

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

  .about-hero {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-page-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }

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

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

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

  .nav-toggle {
    display: block;
  }

  .hero-band h1 {
    font-size: 32px;
    letter-spacing: -0.8px;
  }

  .hero-band p {
    font-size: 16px;
  }

  .section {
    padding: 48px 0;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .contact-section {
    padding: 32px 24px;
  }

  .article-header h1 {
    font-size: 30px;
  }

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

  .about-hero h1 {
    font-size: 34px;
  }
}