@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: inherit;
  text-decoration: none;
}

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

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

/* --- TOP NAV --- */
.site-nav {
  background-color: 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: 16px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
  white-space: nowrap;
}

.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);
  line-height: 1.4;
  transition: color 0.15s;
}

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

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

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

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

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

.nav-mobile ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

/* --- HERO --- */
.hero-band {
  background-color: var(--canvas);
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}

.hero-inner {
  max-width: 760px;
}

.hero-label {
  display: inline-block;
  background-color: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 9999px;
  margin-bottom: 24px;
}

.hero-h1 {
  font-size: 64px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.1;
  letter-spacing: -1.8px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  font-weight: 400;
  color: var(--body);
  line-height: 1.55;
  max-width: 580px;
  margin-bottom: 0;
}

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

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

.section-body {
  font-size: 16px;
  color: var(--body);
  line-height: 1.5;
  max-width: 640px;
}

/* --- ARTICLE CARDS (HOMEPAGE) --- */
.articles-section {
  padding: 80px 0;
}

.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;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s;
}

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

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

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

.article-card-tag {
  display: inline-block;
  background-color: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 9999px;
  margin-bottom: 12px;
  width: fit-content;
}

.article-card-title {
  font-size: 20px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.3;
  letter-spacing: -0.2px;
  margin-bottom: 10px;
}

.article-card-excerpt {
  font-size: 14px;
  color: var(--body);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 20px;
}

.article-card-meta {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}

/* --- FEATURE BAND --- */
.feature-band {
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}

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

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

.feature-card-icon {
  font-size: 22px;
  margin-bottom: 12px;
}

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

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

/* --- CONTACT FORM --- */
.contact-section {
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 48px;
}

.contact-info-title {
  font-size: 22px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.3;
  letter-spacing: -0.11px;
  margin-bottom: 12px;
}

.contact-info-text {
  font-size: 15px;
  color: var(--body);
  line-height: 1.55;
  margin-bottom: 24px;
}

.contact-detail {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.contact-form {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 32px;
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: 0.1px;
}

.form-input,
.form-textarea {
  width: 100%;
  background-color: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 12px 16px;
  height: 44px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.15s;
  outline: none;
}

.form-textarea {
  height: auto;
  resize: vertical;
  min-height: 100px;
}

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

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

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

.form-error-msg.visible {
  display: block;
}

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

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

.btn-primary:disabled {
  opacity: 0.65;
  cursor: default;
}

.btn-secondary {
  background-color: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: 8px;
  padding: 10px 18px;
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: border-color 0.15s;
  display: inline-flex;
  align-items: center;
}

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

.form-success {
  display: none;
  background-color: #f0faf5;
  border: 1px solid #b8e4d0;
  border-radius: 8px;
  padding: 16px;
  font-size: 14px;
  color: var(--semantic-success);
  margin-top: 16px;
}

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

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 48px;
}

.footer-brand-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.footer-brand-name span {
  color: var(--primary);
}

.footer-brand-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  max-width: 240px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.2px;
  margin-bottom: 14px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 13px;
  color: var(--body);
  line-height: 1.4;
  transition: color 0.15s;
}

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

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

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

.footer-bottom-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-bottom-links a {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.15s;
}

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

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

.article-meta-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.article-tag {
  display: inline-block;
  background-color: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 9999px;
}

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

.article-h1 {
  font-size: 48px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -1.2px;
  margin-bottom: 20px;
  max-width: 800px;
}

.article-lead {
  font-size: 18px;
  color: var(--body);
  line-height: 1.6;
  max-width: 700px;
}

.article-hero-img {
  width: 100%;
  height: 440px;
  object-fit: cover;
  border-radius: 12px;
  margin: 48px 0;
  border: 1px solid var(--hairline);
}

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

.article-content {
  max-width: 720px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 64px;
  padding: 48px 0;
}

.article-content h2 {
  font-size: 28px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.25;
  letter-spacing: -0.4px;
  margin: 40px 0 16px;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
  margin: 28px 0 12px;
}

.article-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.65;
  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: 1.65;
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--ink);
  font-weight: 600;
}

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

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

.article-img-block {
  margin: 32px 0;
}

.article-img-block img {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--hairline);
  object-fit: cover;
}

.article-img-caption {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
  margin-top: 8px;
}

.article-callout {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--ink);
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
  margin: 28px 0;
}

.article-callout p {
  font-size: 15px;
  color: var(--ink);
  font-style: italic;
  margin: 0;
}

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

.sidebar-card {
  background-color: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.3px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.sidebar-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-links a {
  font-size: 14px;
  color: var(--body);
  line-height: 1.4;
  transition: color 0.15s;
  display: block;
}

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

.sidebar-links .active-link {
  color: var(--ink);
  font-weight: 500;
}

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

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

.page-updated {
  font-size: 13px;
  color: var(--muted);
}

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

.page-content {
  max-width: 720px;
}

.page-content h2 {
  font-size: 26px;
  font-weight: 400;
  color: var(--ink);
  line-height: 1.25;
  letter-spacing: -0.325px;
  margin: 36px 0 14px;
}

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

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

.page-content strong {
  color: var(--ink);
  font-weight: 600;
}

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

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

/* --- COOKIE BANNER --- */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--ink);
  color: var(--canvas);
  padding: 16px 24px;
  z-index: 999;
  display: none;
}

#cookie-banner.visible {
  display: block;
}

.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: 13px;
  color: var(--canvas-soft);
  line-height: 1.5;
  flex: 1;
  min-width: 260px;
}

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

.cookie-actions {
  display: flex;
  gap: 10px;
}

.btn-cookie-accept {
  background-color: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
}

.btn-cookie-reject {
  background-color: transparent;
  color: var(--canvas);
  border: 1px solid rgba(247,247,244,0.3);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
}

/* --- BREADCRUMB --- */
.breadcrumb {
  padding: 16px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-list li {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li::after {
  content: '/';
  color: var(--hairline-strong);
}

.breadcrumb-list li:last-child::after {
  display: none;
}

.breadcrumb-list a {
  color: var(--muted);
  transition: color 0.15s;
}

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

.breadcrumb-list li:last-child {
  color: var(--body);
}

/* --- DISCLAIMER --- */
.disclaimer-banner {
  background-color: var(--canvas-soft);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 32px;
}

/* --- RESPONSIVE --- */
@media (max-width: 1024px) {
  .hero-h1 {
    font-size: 48px;
    letter-spacing: -1.2px;
  }

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

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

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

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

  .article-sidebar {
    position: static;
  }

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

@media (max-width: 767px) {
  .nav-links {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }

  .hero-band {
    padding: 48px 0;
  }

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

  .hero-sub {
    font-size: 16px;
  }

  .articles-section,
  .feature-band,
  .contact-section {
    padding: 48px 0;
  }

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

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

  .section-title {
    font-size: 28px;
    letter-spacing: -0.4px;
  }

  .article-h1 {
    font-size: 32px;
    letter-spacing: -0.6px;
  }

  .article-hero-img {
    height: 220px;
  }

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

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

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

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .cookie-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}