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

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

:root {
  --canvas: #f7f7f4;
  --canvas-soft: #fafaf7;
  --ink: #26251e;
  --body: #5a5852;
  --body-strong: #26251e;
  --muted: #807d72;
  --muted-soft: #a09c92;
  --primary: #f54e00;
  --primary-active: #d04200;
  --on-primary: #ffffff;
  --surface-card: #ffffff;
  --surface-strong: #e6e5e0;
  --hairline: #e6e5e0;
  --hairline-soft: #efeee8;
  --hairline-strong: #cfcdc4;
  --success: #1f8a65;
  --error: #cf2d56;
  --r-md: 8px;
  --r-lg: 12px;
  --r-pill: 9999px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.5;
  background: var(--canvas);
  color: var(--body);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

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

.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: 64px;
}
.nav-brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}
.nav-brand span { color: var(--primary); }
.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  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: 4px;
  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 {
  padding: 80px 0;
  border-bottom: 1px solid var(--hairline);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.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);
  border-radius: var(--r-pill);
  padding: 4px 12px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -1.2px;
  color: var(--ink);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 18px;
  line-height: 1.5;
  color: var(--body);
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-img {
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  aspect-ratio: 4/3;
}
.hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  text-decoration: none;
}
.btn-primary:hover { background: var(--primary-active); color: var(--on-primary); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  background: var(--surface-card);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline-strong);
  cursor: pointer;
  transition: border-color 0.15s;
  text-decoration: none;
}
.btn-secondary:hover { border-color: var(--ink); color: var(--ink); }

section { padding: 80px 0; }
.section-label {
  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;
  line-height: 1.2;
  letter-spacing: -0.72px;
  color: var(--ink);
  margin-bottom: 16px;
}
.section-sub {
  font-size: 16px;
  color: var(--body);
  max-width: 600px;
  line-height: 1.6;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.15s;
}
.article-card:hover { border-color: var(--hairline-strong); }
.article-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}
.article-card:hover .article-card-img img { transform: scale(1.03); }
.article-card-body { padding: 24px; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.article-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-strong);
  border-radius: var(--r-pill);
  padding: 3px 10px;
}
.article-date {
  font-size: 13px;
  color: var(--muted-soft);
}
.article-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 10px;
}
.article-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  margin-bottom: 16px;
}
.article-read {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}
.article-read:hover { color: var(--primary-active); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.feature-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
}
.feature-icon {
  width: 40px;
  height: 40px;
  background: var(--surface-strong);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature-icon svg { width: 20px; height: 20px; }
.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
}

hr { border: none; border-top: 1px solid var(--hairline); }

.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: 1.6;
  margin-top: 12px;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: var(--body);
  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: 13px;
  color: var(--muted);
}

.article-hero {
  padding: 60px 0 0;
}
.article-hero-inner {
  max-width: 800px;
}
.article-hero-img {
  margin-top: 40px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  aspect-ratio: 16/7;
}
.article-hero-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.breadcrumb {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { color: var(--muted-soft); }

.article-content {
  padding: 60px 0 80px;
}
.article-body {
  max-width: 720px;
}
.article-body h1 {
  font-size: 40px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 20px;
}
.article-body h2 {
  font-size: 26px;
  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;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 20px;
}
.article-body ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}
.article-body ul li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 8px;
}
.article-body a { color: var(--primary); }
.article-body a:hover { color: var(--primary-active); }
.article-info {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--hairline);
  flex-wrap: wrap;
}
.article-info .article-tag { font-size: 11px; }
.article-info time { font-size: 14px; color: var(--muted); }
.article-info .updated { font-size: 13px; color: var(--muted-soft); }

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

.page-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--hairline);
}
.page-hero h1 {
  font-size: 40px;
  font-weight: 400;
  letter-spacing: -0.8px;
  color: var(--ink);
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 18px;
  color: var(--body);
  max-width: 560px;
}
.page-content {
  padding: 60px 0 80px;
  max-width: 720px;
}
.page-content h2 {
  font-size: 24px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.3px;
  margin: 40px 0 12px;
}
.page-content p, .page-content li {
  font-size: 16px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 16px;
}
.page-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}
.page-content a { color: var(--primary); }

.contact-section {
  padding: 80px 0;
  border-top: 1px solid var(--hairline);
}
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.contact-info h2 {
  font-size: 30px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.contact-info p { font-size: 16px; line-height: 1.6; color: var(--body); }
.contact-detail {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.contact-detail-item span:first-child {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  color: var(--muted);
}
.contact-detail-item span:last-child {
  font-size: 15px;
  color: var(--ink);
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.2px;
}
.form-group input,
.form-group textarea {
  background: var(--surface-card);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-md);
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  height: 44px;
  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); }
.form-error {
  font-size: 12px;
  color: var(--error);
  display: none;
}
.form-error.visible { display: block; }
.form-success {
  background: #edf7f3;
  border: 1px solid #9fd4be;
  border-radius: var(--r-md);
  padding: 16px 20px;
  font-size: 15px;
  color: var(--success);
  display: none;
}
.form-success.visible { display: block; }
.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: var(--on-primary);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 20px;
  height: 44px;
  border-radius: var(--r-md);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  width: 100%;
}
.btn-submit:hover { background: var(--primary-active); }
.btn-submit:disabled { background: var(--muted-soft); cursor: not-allowed; }
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}
.btn-submit.loading .spinner { display: block; }
.btn-submit.loading .btn-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

#cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--canvas);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  max-width: 560px;
  width: calc(100% - 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  z-index: 1000;
  box-shadow: 0 8px 32px rgba(38,37,30,0.18);
}
#cookie-banner p { font-size: 14px; color: #d0cfc8; line-height: 1.5; }
#cookie-banner a { color: var(--canvas); text-decoration: underline; }
.cookie-actions { display: flex; gap: 10px; flex-shrink: 0; }
.cookie-accept {
  background: var(--primary);
  color: var(--on-primary);
  border: none;
  border-radius: var(--r-md);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}
.cookie-reject {
  background: transparent;
  color: #d0cfc8;
  border: 1px solid #4a4940;
  border-radius: var(--r-md);
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .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;
    gap: 16px;
    z-index: 99;
  }
  .nav-hamburger { display: flex; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 32px; letter-spacing: -0.6px; }
  .articles-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
  .section-title { font-size: 28px; }
  .article-body h1 { font-size: 28px; }
  .article-body h2 { font-size: 22px; }
  #cookie-banner { flex-direction: column; align-items: flex-start; gap: 16px; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .articles-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 38px; }
}