@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;
  --success: #1f8a65;
  --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;
  -webkit-font-smoothing: antialiased;
}

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

.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-logo {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.3px;
}

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

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

.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;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

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

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

.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

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

.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;
  padding: 4px 10px;
  border-radius: var(--rounded-pill);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 72px;
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -2.16px;
  color: var(--ink);
  max-width: 860px;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 18px;
  font-weight: 400;
  color: var(--body);
  max-width: 600px;
  line-height: 1.55;
  margin-bottom: 40px;
}

/* ---- SECTION STYLES ---- */
.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;
}

.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: 1.5;
}

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

/* ---- CARDS ---- */
.card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 24px;
}

.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;
}

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

.card-body {
  font-size: 15px;
  color: var(--body);
  line-height: 1.55;
}

.card-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--hairline-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ---- ARTICLE CARD ---- */
.article-card {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  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: 20px 24px 24px;
}

.article-tag {
  display: inline-block;
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.88px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--rounded-pill);
  margin-bottom: 12px;
}

.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: 1.55;
  margin-bottom: 16px;
}

.article-card-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}

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

/* ---- ARTICLE PAGE ---- */
.article-hero {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--hairline);
}

.article-hero-img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--rounded-lg);
  border: 1px solid var(--hairline);
  margin-top: 32px;
}

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

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

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 6px; }

.article-title {
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -1.2px;
  color: var(--ink);
  max-width: 760px;
  margin-bottom: 16px;
}

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

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

.article-content h2 {
  font-size: 28px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.4px;
  margin: 48px 0 16px;
  line-height: 1.25;
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 32px 0 12px;
  line-height: 1.3;
}

.article-content p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 20px;
}

.article-content ul, .article-content ol {
  margin: 16px 0 20px 20px;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

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

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

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: rgba(245, 78, 0, 0.3);
}

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

.info-box {
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--primary);
  border-radius: var(--rounded-md);
  padding: 20px 24px;
  margin: 28px 0;
}

.info-box p {
  margin-bottom: 0;
  font-size: 15px;
}

.code-inline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-xs);
  padding: 2px 6px;
  color: var(--ink);
}

/* ---- RELATED ARTICLES ---- */
.related-articles {
  padding: 64px 0;
  border-top: 1px solid var(--hairline);
  margin-top: 64px;
}

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

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

.page-sub {
  font-size: 18px;
  color: var(--body);
  max-width: 620px;
  line-height: 1.6;
}

/* ---- CONTACT FORM ---- */
.form-section {
  padding: 80px 0;
  background: var(--canvas-soft);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

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

.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: var(--surface-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  padding: 12px 16px;
  height: 44px;
  font-family: inherit;
  font-size: 15px;
  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(--ink);
}

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

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

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

.btn-submit {
  background: var(--ink);
  color: var(--canvas);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 12px 20px;
  height: 44px;
  border: none;
  border-radius: var(--rounded-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: opacity 0.15s;
}

.btn-submit:hover { opacity: 0.85; }
.btn-submit:disabled { opacity: 0.5; cursor: default; }

.form-confirmation {
  display: none;
  background: var(--surface-card);
  border: 1px solid var(--hairline);
  border-left: 3px solid var(--success);
  border-radius: var(--rounded-md);
  padding: 20px 24px;
  margin-top: 20px;
  font-size: 15px;
  color: var(--ink);
}

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

/* ---- COOKIE BANNER ---- */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface-card);
  border-top: 1px solid var(--hairline);
  padding: 20px 24px;
  z-index: 200;
  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: 14px;
  color: var(--body);
  flex: 1;
  min-width: 260px;
}

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

.cookie-btns {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

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

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

.btn-cookie-reject {
  background: var(--surface-card);
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  height: 40px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--rounded-md);
  cursor: pointer;
  transition: border-color 0.15s;
}

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

/* ---- FOOTER ---- */
.site-footer {
  background: var(--canvas);
  border-top: 1px solid var(--hairline);
  padding: 64px 0 48px;
}

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

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

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

.footer-desc {
  font-size: 14px;
  color: var(--body);
  line-height: 1.6;
  max-width: 280px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.4px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.footer-links 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;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

/* ---- PROSE PAGES ---- */
.prose {
  max-width: 740px;
  padding: 64px 0 80px;
}

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

.prose h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin: 28px 0 10px;
}

.prose p {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 18px;
}

.prose ul { list-style: disc; margin: 0 0 18px 20px; }
.prose li {
  font-size: 16px;
  color: var(--body);
  line-height: 1.7;
  margin-bottom: 6px;
}

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

/* ---- STATS ROW ---- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  overflow: hidden;
  margin: 48px 0;
}

.stat-item {
  background: var(--surface-card);
  padding: 28px 24px;
  text-align: center;
}

.stat-num {
  font-size: 32px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: -0.8px;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 56px; letter-spacing: -1.5px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .hero h1 { font-size: 36px; letter-spacing: -0.8px; }
  .hero { padding: 48px 0 48px; }
  .section-title { font-size: 28px; }
  .article-title { font-size: 32px; letter-spacing: -0.5px; }
  .page-title { font-size: 32px; letter-spacing: -0.5px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .card-grid, .card-grid-2 { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .cookie-inner { flex-direction: column; }
}