/* ============================================================
   guides.css — shared styles for paulsunnydev.com/guides/
   Standalone pages: no framework, no build step, no webfonts.
   Matches the site's Apple-inspired dark design system.
   ============================================================ */

:root {
  --bg: #0a0a0a;
  --ink: #f5f5f7;
  --sub: #86868b;
  --accent: #00d4ff;
  --panel: #101012;
  --line: rgba(255, 255, 255, 0.1);
  --line-soft: rgba(255, 255, 255, 0.3);
  --column: 680px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--sub);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 19px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(0, 212, 255, 0.28);
  color: #ffffff;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ------------------------------- Header ------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 10, 10, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header .bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.brand svg {
  width: 20px;
  height: 20px;
  flex: none;
}

/* ------------------------------- Buttons ------------------------------ */

.btn {
  display: inline-block;
  border-radius: 980px;
  padding: 14px 28px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #000000;
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: #4ddcff;
  border-color: #4ddcff;
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-soft);
}

.btn-secondary:hover {
  background: #ffffff;
  border-color: #ffffff;
  color: #000000;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
  white-space: nowrap;
}

/* -------------------------------- Main -------------------------------- */

main {
  max-width: var(--column);
  margin: 0 auto;
  padding: 88px 24px 120px;
}

main.wide {
  max-width: 880px;
}

/* Small-caps label */
.kicker {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--sub);
}

.breadcrumb {
  margin: 0 0 32px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--sub);
}

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

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

h1,
h2,
h3 {
  color: var(--ink);
  letter-spacing: -0.02em;
}

h1 {
  margin: 0 0 32px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
  font-weight: 700;
}

/* ------------------------------- Prose -------------------------------- */

.prose p {
  margin: 24px 0;
}

.prose ul,
.prose ol {
  margin: 24px 0;
  padding-left: 28px;
}

.prose li {
  margin: 12px 0;
}

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

.prose em {
  color: var(--ink);
}

.prose a:not(.btn) {
  color: var(--accent);
}

.prose h2 {
  margin: 72px 0 8px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.2;
  font-weight: 700;
}

.prose h3 {
  margin: 48px 0 8px;
  font-size: 1.3rem;
  line-height: 1.3;
  font-weight: 600;
}

/* Lead paragraph directly under the H1 */
.lede {
  font-size: 21px;
  color: #a1a1a6;
}

.lede strong {
  color: var(--ink);
}

/* ------------------------------ Panels -------------------------------- */

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 40px;
}

.callout {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 18px;
  padding: 28px 32px;
  margin: 40px 0;
}

.callout p {
  margin: 0;
}

.callout p + p {
  margin-top: 16px;
}

.price {
  color: var(--accent);
  font-weight: 600;
  white-space: nowrap;
}

/* -------------------------------- CTA --------------------------------- */

.cta-panel {
  margin-top: 96px;
  padding: 56px 40px;
  text-align: center;
}

.cta-panel h2 {
  margin: 0 0 16px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

.cta-panel p {
  margin: 0 auto 28px;
  max-width: 480px;
}

.cta-note {
  margin: 24px auto 0;
  max-width: 460px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sub);
}

.cta-note strong {
  color: var(--ink);
  font-weight: 600;
}

/* ------------------------------ Author -------------------------------- */

.author {
  margin-top: 72px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--sub);
}

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

.author a {
  color: var(--accent);
}

/* ------------------------------- Tables ------------------------------- */

.table-wrap {
  margin: 40px 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow-x: auto;
  background: var(--panel);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  line-height: 1.5;
}

th,
td {
  padding: 14px 18px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

td {
  color: var(--sub);
}

td strong {
  color: var(--ink);
  font-weight: 600;
}

/* Stack table rows under 640px */
@media (max-width: 640px) {
  table.stack thead {
    display: none;
  }

  table.stack,
  table.stack tbody,
  table.stack tr,
  table.stack td {
    display: block;
    width: 100%;
  }

  table.stack tr {
    border-bottom: 1px solid var(--line);
    padding: 16px 0;
  }

  table.stack tr:last-child {
    border-bottom: none;
  }

  table.stack td {
    border: none;
    padding: 6px 18px;
  }

  table.stack td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 2px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--sub);
  }
}

/* ------------------------------ Hub cards ----------------------------- */

.guide-list {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.guide-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 40px;
  text-decoration: none;
  transition: border-color 0.2s ease;
}

.guide-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
}

.guide-card h2 {
  margin: 12px 0 0;
  font-size: 24px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.guide-card .desc {
  margin: 12px 0 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--sub);
}

.guide-card .read {
  margin: 20px 0 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}

/* ------------------------------- Footer ------------------------------- */

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 40px 24px 56px;
  text-align: center;
  font-size: 14px;
  color: var(--sub);
}

.site-footer a {
  color: var(--sub);
  text-decoration: none;
}

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

/* ----------------------------- Small screens -------------------------- */

@media (max-width: 640px) {
  body {
    font-size: 17px;
  }

  main {
    padding: 64px 20px 96px;
  }

  .site-header .bar {
    padding: 14px 16px;
  }

  .panel,
  .cta-panel,
  .guide-card {
    padding: 28px 24px;
  }
}