* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, sans-serif;
  background: #0f0f12;
  color: #e4e4e7;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  z-index: 10;
  gap: 1rem;
  background: #0f0f12;
  border-bottom: 1px solid #1f1f23;
}

.site-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.85rem;
  text-decoration: none;
  color: #e4e4e7;
}

.site-brand .site-brand-mark {
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 0.95rem;
}

.site-brand .site-brand-home {
  font-size: 0.9rem;
  color: #a1a1aa;
}

.site-brand:hover .site-brand-mark,
.site-brand:hover .site-brand-home {
  color: #fff;
}

.site-header a,
.site-header a:link,
.site-header a:visited {
  font-size: 0.9rem;
  color: #e4e4e7;
  text-decoration: none;
}

.site-header a:hover {
  color: #fff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-left: auto;
}

main {
  text-align: center;
  padding: 2rem;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.tagline {
  font-size: 1.25rem;
  color: #a1a1aa;
  margin: 0 0 1rem;
}

.sub {
  font-size: 0.9rem;
  color: #71717a;
  max-width: 28ch;
  margin: 0 auto;
}

.intro {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #a1a1aa;
  max-width: 42rem;
  margin: 0 auto 1rem;
}

.intro.sub {
  max-width: 42rem;
  font-size: 0.9rem;
  color: #71717a;
}

main a {
  color: #a1a1aa;
  text-decoration: none;
}

main a:hover {
  color: #e4e4e7;
  text-decoration: underline;
}

/* Footer (all pages) */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
  padding: 1rem 1.5rem;
  font-size: 0.8rem;
  color: #71717a;
  z-index: 10;
  background: #0f0f12;
  border-top: 1px solid #1f1f23;
}

/* Tool/guide pages: footer in flow so it doesn't overlap long content */
body.tool-page .site-footer,
body.guide-page .site-footer {
  position: static;
  margin-top: 2rem;
  padding-bottom: 2rem;
}

.site-footer a,
.site-footer a:link,
.site-footer a:visited {
  color: #71717a;
  text-decoration: none;
}

.site-footer a:hover {
  color: #a1a1aa;
}

.footer-sep {
  margin: 0 0.5rem;
  color: #52525b;
}

/* Legal pages (privacy, terms) */
body.legal-page {
  justify-content: flex-start;
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.legal-main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: left;
}

.legal-main h1 {
  margin-bottom: 0.25rem;
}

.legal-updated {
  font-size: 0.875rem;
  color: #71717a;
  margin: 0 0 2rem;
}

.legal-main section {
  margin-bottom: 1.5rem;
}

.legal-main h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: #e4e4e7;
}

.legal-main p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #a1a1aa;
  margin: 0;
}

/* Guides (index + article pages) */
body.guide-page {
  justify-content: flex-start;
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.guide-main {
  width: 100%;
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: left;
}

.guide-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #60a5fa;
  margin: 0 0 0.75rem;
  font-weight: 600;
}

.guide-main h1 {
  font-size: clamp(1.85rem, 4.5vw, 2.6rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.guide-lede {
  font-size: 1.1rem;
  color: #d4d4d8;
  line-height: 1.6;
  margin: 0 0 1rem;
}

.guide-meta {
  font-size: 0.85rem;
  color: #71717a;
  margin: 0 0 2.25rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.guide-meta .dot {
  color: #3f3f46;
}

.guide-main h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 2.5rem 0 0.75rem;
  color: #fafafa;
  letter-spacing: -0.01em;
  scroll-margin-top: 4rem;
}

.guide-main h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  color: #e4e4e7;
}

.guide-main p,
.guide-main li {
  color: #c8c8cf;
  line-height: 1.7;
  font-size: 1rem;
}

.guide-main p {
  margin: 0 0 1rem;
}

.guide-main ul,
.guide-main ol {
  margin: 0 0 1.25rem;
  padding-left: 1.4rem;
}

.guide-main li {
  margin: 0 0 0.5rem;
}

.guide-main a {
  color: #93c5fd;
  text-decoration: none;
  border-bottom: 1px solid rgba(147, 197, 253, 0.3);
}

.guide-main a:hover {
  color: #bfdbfe;
  border-bottom-color: #bfdbfe;
}

.guide-main strong {
  color: #fafafa;
  font-weight: 600;
}

.guide-main code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.875em;
  background: #18181b;
  border: 1px solid #27272a;
  color: #e4e4e7;
  padding: 0.05em 0.4em;
  border-radius: 4px;
}

.guide-main pre {
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
  margin: 0 0 1.25rem;
}

.guide-main pre code {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: inherit;
  color: #d4d4d8;
}

.guide-main blockquote {
  margin: 0 0 1.25rem;
  padding: 0.85rem 1.1rem;
  border-left: 3px solid #3b82f6;
  background: rgba(59, 130, 246, 0.07);
  border-radius: 0 6px 6px 0;
  color: #d4d4d8;
}

.guide-main blockquote p { margin: 0; }

.guide-tldr {
  background: #18181b;
  border: 1px solid #27272a;
  border-left: 3px solid #34d399;
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 0 0 2rem;
}

.guide-tldr .tldr-label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #34d399;
  font-weight: 700;
  margin: 0 0 0.4rem;
}

.guide-tldr p { margin: 0; color: #d4d4d8; }

.guide-callout {
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: 8px;
  padding: 0.95rem 1.1rem;
  margin: 0 0 1.25rem;
}

.guide-callout.warn { border-color: rgba(248, 113, 113, 0.35); background: rgba(248, 113, 113, 0.05); }
.guide-callout.tip { border-color: rgba(96, 165, 250, 0.35); background: rgba(96, 165, 250, 0.05); }
.guide-callout p:last-child { margin-bottom: 0; }

.guide-diagram {
  margin: 1.5rem 0 1.75rem;
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: 10px;
  padding: 1.25rem 1.1rem 1rem;
}

.guide-diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 640px;
  margin: 0 auto;
}

.guide-diagram figcaption {
  margin: 0.85rem 0 0;
  text-align: center;
  color: #71717a;
  font-size: 0.85rem;
  line-height: 1.5;
}

.guide-cta {
  margin: 2.5rem 0 1rem;
  padding: 1.25rem 1.4rem;
  background: linear-gradient(135deg, rgba(59,130,246,0.08), rgba(59,130,246,0.02));
  border: 1px solid rgba(96, 165, 250, 0.25);
  border-radius: 10px;
}

.guide-cta h3 { margin: 0 0 0.4rem; font-size: 1.05rem; color: #fafafa; }
.guide-cta p { margin: 0 0 0.85rem; color: #c8c8cf; }

.guide-cta .cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.guide-cta .cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.95rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
}

.guide-cta .cta-primary { background: #3b82f6; color: #fff; border: 0; }
.guide-cta .cta-primary:hover { background: #2563eb; color: #fff; }
.guide-cta .cta-secondary { background: #18181b; color: #e4e4e7; border-color: #3f3f46; }
.guide-cta .cta-secondary:hover { background: #27272a; color: #fff; }

.guide-cta a { border-bottom: 0; }

.guide-related {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #27272a;
}

.guide-related h2 {
  font-size: 1rem;
  margin: 0 0 1rem;
  color: #a1a1aa;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

.guide-related ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.5rem;
}

.guide-related li { margin: 0; }

.guide-related a {
  display: block;
  padding: 0.65rem 0.85rem;
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: 6px;
  color: #e4e4e7;
  font-size: 0.95rem;
  border-bottom: 1px solid #27272a;
}

.guide-related a:hover {
  background: #1f1f23;
  border-color: #3f3f46;
  color: #fff;
}

/* Guides index */
.guides-index-main {
  width: 100%;
  max-width: 46rem;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  text-align: left;
}

.guides-index-main h1 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}

.guides-index-main .lede {
  font-size: 1.05rem;
  color: #a1a1aa;
  line-height: 1.6;
  margin: 0 0 2.5rem;
  max-width: 36rem;
}

.guide-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.guide-card {
  display: block;
  background: #18181b;
  border: 1px solid #27272a;
  border-radius: 10px;
  padding: 1.25rem 1.35rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 120ms ease, background 120ms ease;
}

.guide-card:hover {
  border-color: #3f3f46;
  background: #1f1f23;
  text-decoration: none;
}

.guide-card .card-tag {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #60a5fa;
  font-weight: 600;
  margin: 0 0 0.55rem;
}

.guide-card h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  color: #fafafa;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.guide-card p {
  margin: 0 0 0.65rem;
  color: #a1a1aa;
  font-size: 0.95rem;
  line-height: 1.55;
}

.guide-card .card-meta {
  font-size: 0.8rem;
  color: #71717a;
}