/* ====================================================
   CSS Custom Properties — Palette & Tokens
   ==================================================== */
:root {
  --sky:       #38BDF8;
  --ocean:     #0369A1;
  --navy:      #0F172A;
  --navy-mid:  #1E293B;
  --mango:     #FB923C;
  --tangerine: #F97316;
  --sky-light: #E0F2FE;
  --sky-faint: #F0F9FF;
  --white:     #FFFFFF;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-400: #94A3B8;
  --slate-600: #475569;
  --slate-800: #1E293B;
  --text:      #1E293B;
  --text-muted:#475569;

  --header-h: 64px;
  --radius:   8px;
  --transition: 0.2s ease;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.08), 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 16px rgba(15,23,42,.10), 0 2px 6px rgba(15,23,42,.08);
}

/* ====================================================
   Reset & Base
   ==================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

img, svg { max-width: 100%; display: block; }

/* ====================================================
   Typography
   ==================================================== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--navy);
}

h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.35rem, 3vw, 2rem);    margin: 2.5rem 0 0.75rem; color: var(--ocean); }
h3 { font-size: clamp(1.1rem,  2vw, 1.4rem);  margin: 2rem 0 0.5rem; }
h4 { font-size: 1.1rem; margin: 1.5rem 0 0.4rem; }

p { margin-bottom: 1.1rem; }

ul, ol { padding-left: 1.5rem; margin-bottom: 1.1rem; }
li { margin-bottom: 0.35rem; }

strong { color: var(--navy); }
em     { color: var(--ocean); }

/* Anchor scroll offset for sticky header */
h1[id], h2[id], h3[id], h4[id], h5[id], h6[id],
:target {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

/* ====================================================
   Links
   ==================================================== */
a {
  color: var(--ocean);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
a:hover  { color: var(--tangerine); }
a:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ====================================================
   Layout Container
   ==================================================== */
.container {
  width: 100%;
  max-width: 1480px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
}

/* ====================================================
   Sticky Header
   ==================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: var(--navy);
  box-shadow: 0 2px 12px rgba(15,23,42,.35);
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 2rem;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  flex-shrink: 0;
}
.site-logo img { width: 38px; height: 38px; border-radius: 6px; }
.site-logo-text {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--white);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.site-logo-text span { display: block; color: var(--sky); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.04em; }
.site-logo:hover .site-logo-text { color: var(--sky); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}
.site-nav a {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  color: var(--slate-200);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgba(56,189,248,.15);
  color: var(--sky);
}
.site-nav a .nav-icon { font-size: 1.1em; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--white);
  font-size: 1.6rem;
  padding: 0.25rem;
  line-height: 1;
}

/* ====================================================
   Footer
   ==================================================== */
.site-footer {
  background: var(--navy);
  color: var(--slate-400);
  padding: 2.5rem 0 1.5rem;
  margin-top: 4rem;
}
.site-footer .container { display: flex; flex-wrap: wrap; gap: 2rem; justify-content: space-between; align-items: flex-start; }
.footer-brand { flex: 1 1 220px; }
.footer-brand .site-logo-text { color: var(--white); }
.footer-brand p { margin-top: 0.6rem; font-size: 0.85rem; color: var(--slate-400); }
.footer-nav   { flex: 1 1 220px; }
.footer-nav h3 { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--sky); margin-bottom: 0.75rem; font-weight: 600; }
.footer-nav ul { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: 0.4rem; }
.footer-nav a  { color: var(--slate-400); text-decoration: none; font-size: 0.88rem; transition: color var(--transition); }
.footer-nav a:hover { color: var(--sky); }
.footer-bottom {
  width: 100%;
  border-top: 1px solid rgba(255,255,255,.06);
  margin-top: 1.5rem;
  padding-top: 1rem;
  font-size: 0.8rem;
  text-align: center;
  color: var(--slate-400);
}

/* ====================================================
   HOME PAGE
   ==================================================== */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #0C4A6E 60%, var(--ocean) 100%);
  color: var(--white);
  padding: clamp(3rem, 8vw, 6rem) 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(56,189,248,.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container { position: relative; }

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
}
.hero-eyebrow {
  display: inline-block;
  background: rgba(56,189,248,.15);
  color: var(--sky);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 0.8rem;
  border-radius: 2rem;
  margin-bottom: 1rem;
}
.hero h1 {
  color: var(--white);
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 5vw, 3.5rem);
}
.hero h1 em { color: var(--sky); font-style: normal; }
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--slate-200);
  max-width: 640px;
  margin-bottom: 2rem;
  line-height: 1.75;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--sky) 0%, var(--ocean) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(3,105,161,.4);
}
.btn-primary:hover { box-shadow: 0 6px 20px rgba(3,105,161,.55); color: var(--white); }
.btn-secondary {
  background: linear-gradient(135deg, var(--tangerine) 0%, var(--mango) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(249,115,22,.35);
}
.btn-secondary:hover { box-shadow: 0 6px 20px rgba(249,115,22,.5); color: var(--white); }
.btn-icon { font-size: 1.25em; }

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(56,189,248,.2);
  border-radius: 12px;
  backdrop-filter: blur(4px);
}
.queue-lane {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.queue-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}
.queue-bar {
  height: 10px;
  border-radius: 5px;
  background: rgba(56,189,248,.3);
  flex: 1;
}
.queue-bar-fill {
  height: 100%;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--sky), var(--ocean));
}

/* Section cards grid */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
  padding: clamp(2rem, 6vw, 4rem) 0;
}
.section-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
}
.section-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--sky);
}
.section-card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.1rem;
}
.section-card-icon.blue { background: var(--sky-light); }
.section-card-icon.orange { background: #FFF7ED; }
.section-card h2 { font-size: 1.25rem; margin: 0 0 0.6rem; color: var(--navy); }
.section-card p  { color: var(--text-muted); font-size: 0.92rem; flex: 1; margin-bottom: 1.25rem; }

.sub-links { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.sub-links li { border-top: 1px solid var(--slate-200); }
.sub-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 0;
  font-size: 0.87rem;
  color: var(--ocean);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}
.sub-links a:hover { color: var(--tangerine); padding-left: 0.35rem; }
.sub-links a::after { content: '→'; font-size: 0.8em; opacity: 0.5; }

.card-cta {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius);
  background: var(--sky-faint);
  color: var(--ocean);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--sky-light);
  transition: background var(--transition), transform var(--transition);
}
.card-cta:hover { background: var(--sky-light); transform: translateX(2px); color: var(--ocean); }

/* Homepage intro text */
.home-intro {
  padding: clamp(2rem, 5vw, 3.5rem) 0 0;
  max-width: 900px;
}
.home-intro h2 { margin-top: 0; }

/* ====================================================
   CONTENT PAGES
   ==================================================== */
.content-wrap {
  padding: 2rem 0 4rem;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding: 0.6rem 0.8rem;
  background: var(--slate-100);
  border-radius: var(--radius);
}
.breadcrumbs a { color: var(--ocean); text-decoration: none; }
.breadcrumbs a:hover { color: var(--tangerine); text-decoration: underline; }
.breadcrumbs .sep { color: var(--slate-400); user-select: none; }
.breadcrumbs .current { color: var(--navy); font-weight: 600; }

/* Content layout: sidebar + main */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 3rem;
  align-items: start;
}
.content-main { min-width: 0; }
.content-sidebar {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

/* Page title — first H1 in article gets gradient treatment */
.content-main h1:first-child {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  background: linear-gradient(135deg, var(--navy) 0%, var(--ocean) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

/* Article prose */
.content-main h2 {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--sky-light);
  color: var(--ocean);
}
.content-main h3 { color: var(--navy-mid); }
.content-main a  { color: var(--ocean); font-weight: 500; }
.content-main a:hover { color: var(--tangerine); }

/* Tables */
.table-wrap { overflow-x: auto; margin: 1.5rem 0; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  white-space: nowrap;
}
th {
  background: var(--navy);
  color: var(--white);
  padding: 0.7rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}
td { padding: 0.65rem 1rem; border-bottom: 1px solid var(--slate-200); }
tr:nth-child(even) td { background: var(--sky-faint); }
tr:hover td { background: var(--sky-light); }

/* Related nav sidebar */
.related-nav {
  background: var(--slate-100);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--slate-200);
}
.related-nav h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ocean);
  margin: 0 0 0.75rem;
  font-weight: 700;
}
.related-nav ul { list-style: none; padding: 0; margin: 0; }
.related-nav li { border-top: 1px solid var(--slate-200); }
.related-nav li:first-child { border-top: none; }
.related-nav a {
  display: block;
  padding: 0.5rem 0;
  font-size: 0.85rem;
  color: var(--ocean);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}
.related-nav a:hover { color: var(--tangerine); padding-left: 0.3rem; }

/* ====================================================
   CODE BLOCKS
   ==================================================== */
/* Override Prism theme for light scheme */
pre[class*="language-"],
code[class*="language-"] {
  font-family: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.875rem;
  line-height: 1.65;
  tab-size: 2;
}

pre[class*="language-"] {
  position: relative;
  background: #F0F9FF !important;
  border: 1px solid #BAE6FD;
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem;
  overflow: auto;
  margin: 1.5rem 0;
}

/* Token colours matching the palette */
.token.comment,  .token.prolog,  .token.doctype,  .token.cdata { color: #64748B; font-style: italic; }
.token.punctuation { color: #475569; }
.token.property, .token.tag,     .token.boolean,  .token.number,
.token.constant, .token.symbol,  .token.deleted   { color: #0369A1; }
.token.selector, .token.attr-name,.token.string,  .token.char,
.token.builtin,  .token.inserted { color: #0C7041; }
.token.operator, .token.entity,  .token.url,
.language-css .token.string,
.style .token.string              { color: #9333EA; }
.token.atrule,   .token.attr-value,.token.keyword { color: #0F172A; font-weight: 600; }
.token.function, .token.class-name { color: #C2410C; }
.token.regex,    .token.important, .token.variable{ color: #B45309; }

/* Copy button */
.copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ocean);
  background: var(--white);
  border: 1px solid var(--sky);
  border-radius: 5px;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition);
  opacity: 0.7;
  z-index: 1;
}
.copy-btn:hover  { background: var(--sky-light); opacity: 1; transform: scale(1.04); }
.copy-btn.copied { background: #D1FAE5; color: #065F46; border-color: #6EE7B7; opacity: 1; }

/* Inline code */
:not(pre) > code {
  background: var(--sky-faint);
  color: var(--ocean);
  border: 1px solid #BAE6FD;
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.88em;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ====================================================
   FAQ ACCORDIONS
   ==================================================== */
.faq-list { margin: 1.5rem 0; }
details.faq-item {
  border: 1px solid var(--sky-light);
  border-radius: var(--radius);
  margin-bottom: 0.6rem;
  background: var(--sky-faint);
  transition: box-shadow var(--transition);
}
details.faq-item[open] {
  box-shadow: 0 2px 8px rgba(3,105,161,.1);
  border-color: var(--sky);
}
details.faq-item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
  transition: background var(--transition);
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--ocean);
  flex-shrink: 0;
  transition: transform var(--transition);
  font-weight: 300;
}
details.faq-item[open] summary::after { transform: rotate(45deg); }
details.faq-item summary:hover { background: var(--sky-light); border-radius: var(--radius); }
.faq-item-body {
  padding: 0 1.25rem 1.1rem;
  color: var(--text-muted);
  line-height: 1.75;
  font-size: 0.93rem;
}

/* ====================================================
   CHECKBOXES
   ==================================================== */
.task-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
  list-style: none;
}
.task-item input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--ocean);
  cursor: pointer;
  flex-shrink: 0;
}
.task-item.checked .task-label {
  text-decoration: line-through;
  color: var(--slate-400);
}

/* ====================================================
   RESPONSIVE
   ==================================================== */
@media (max-width: 1024px) {
  .content-layout { grid-template-columns: 1fr; }
  .content-sidebar { position: static; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}

@media (max-width: 768px) {
  .site-nav { display: none; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--navy); padding: 1rem; gap: 0.25rem; box-shadow: 0 8px 20px rgba(0,0,0,.3); }
  .site-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .sections-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
}

@media (max-width: 480px) {
  table { font-size: 0.82rem; }
  th, td { padding: 0.5rem 0.6rem; }
}