/* DevGuide Vault – Landing Page (Static)
   - No external dependencies
   - Mobile-first responsive
   - High contrast B/W with subtle glow
*/

:root{
  --bg: #0b0d12;
  --surface: rgba(255,255,255,0.06);
  --surface2: rgba(255,255,255,0.09);
  --text: rgba(255,255,255,0.92);
  --muted: rgba(255,255,255,0.70);
  --muted2: rgba(255,255,255,0.55);
  --border: rgba(255,255,255,0.14);
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --radius: 18px;
  --radius2: 26px;
  --max: 1160px;
  --focus: rgba(255,255,255,.85);
}

@media (prefers-color-scheme: light) {
  :root{
    --bg: #f7f8fb;
    --surface: rgba(0,0,0,0.04);
    --surface2: rgba(0,0,0,0.06);
    --text: rgba(0,0,0,0.92);
    --muted: rgba(0,0,0,0.70);
    --muted2: rgba(0,0,0,0.55);
    --border: rgba(0,0,0,0.12);
    --shadow: 0 16px 50px rgba(0,0,0,.10);
    --focus: rgba(0,0,0,.75);
  }
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
img{ max-width: 100%; height: auto; }

.container{
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.skip{
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  color: #000;
  padding: .6rem .8rem;
  border-radius: 10px;
}
.skip:focus{ left: 12px; top: 12px; z-index: 2000; }

.site-header{
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease, box-shadow .18s ease;
}
.site-header.is-elevated{
  border-bottom-color: var(--border);
  box-shadow: 0 10px 40px rgba(0,0,0,.15);
}

.header-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .85rem 0;
  gap: 1rem;
}

.brand{
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  font-weight: 680;
  letter-spacing: .2px;
  text-decoration: none !important;
}

.site-nav{
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-toggle{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: inherit;
  cursor: pointer;
}
.nav-toggle .bar{
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  margin: 2px 0;
  opacity: .85;
}
.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  border: 0;
}

.nav-links{
  list-style: none;
  margin: 0;
  padding: 0;
  display: none;
  position: absolute;
  right: 1rem;
  top: 64px;
  width: min(360px, calc(100% - 2rem));
  background: color-mix(in oklab, var(--bg) 70%, transparent);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.nav-links li{ border-top: 1px solid var(--border); }
.nav-links li:first-child{ border-top: none; }
.nav-links a{
  display: block;
  padding: .9rem 1rem;
  text-decoration: none !important;
}
.nav-links a:hover{
  background: var(--surface2);
}
.nav-links .sep{ display:none; }

.nav-open .nav-links{ display:block; }

@media (min-width: 920px){
  .nav-toggle{ display:none; }
  .nav-links{
    position: static;
    display: flex;
    align-items: center;
    width: auto;
    background: none;
    border: none;
    box-shadow: none;
    gap: .35rem;
  }
  .nav-links li{ border: none; }
  .nav-links a{
    padding: .55rem .8rem;
    border-radius: 12px;
  }
  .nav-links a:hover{ background: var(--surface); }
  .nav-links .sep{
    display:block;
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 .4rem;
  }
}

.bg-stars{
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background:
    radial-gradient(circle at 14% 20%, rgba(255,255,255,.16) 0 1px, transparent 2px),
    radial-gradient(circle at 66% 14%, rgba(255,255,255,.12) 0 1px, transparent 2px),
    radial-gradient(circle at 90% 40%, rgba(255,255,255,.10) 0 1px, transparent 2px),
    radial-gradient(circle at 30% 80%, rgba(255,255,255,.10) 0 1px, transparent 2px),
    radial-gradient(circle at 55% 60%, rgba(255,255,255,.08) 0 1px, transparent 2px),
    linear-gradient(to bottom, transparent, rgba(0,0,0,.25));
  filter: blur(.2px);
  animation: drift 26s linear infinite;
}
@keyframes drift{
  0%{ transform: translateY(0px); }
  50%{ transform: translateY(-10px); }
  100%{ transform: translateY(0px); }
}
@media (prefers-reduced-motion: reduce){
  .bg-stars{ animation: none; }
}

.hero{
  padding: 4.5rem 0 2.5rem;
}
.hero-grid{
  display: grid;
  gap: 1.6rem;
  align-items: stretch;
}
@media (min-width: 980px){
  .hero-grid{ grid-template-columns: 1.12fr .88fr; gap: 2rem; }
  .hero{ padding: 5.5rem 0 3.5rem; }
}

.kicker{
  display: inline-flex;
  gap: .5rem;
  align-items: center;
  padding: .35rem .7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: .92rem;
}

h1{
  margin: .9rem 0 .6rem;
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-size: clamp(2rem, 3.8vw, 3.1rem);
}
.lede{
  margin: 0 0 1.25rem;
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 58ch;
}

.cta-row{
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  margin: 1.2rem 0 1.2rem;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .78rem 1.05rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: inherit;
  text-decoration: none !important;
  cursor: pointer;
  font-weight: 620;
}
.btn:hover{ background: var(--surface2); }
.btn.primary{
  background: linear-gradient(180deg, color-mix(in oklab, #fff 18%, transparent), var(--surface));
  border-color: color-mix(in oklab, var(--border) 70%, #fff 30%);
}
.btn.ghost{ background: transparent; }
.btn.small{ padding: .55rem .85rem; border-radius: 12px; font-weight: 600; }
.btn.w100{ width: 100%; }

.trust{
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: .35rem;
  color: var(--muted2);
  font-size: .95rem;
}
.trust .dot{
  display:inline-block;
  width: .45rem;
  height: .45rem;
  border-radius: 999px;
  background: currentColor;
  opacity: .6;
  margin-right: .55rem;
  transform: translateY(-1px);
}

.hero-card{
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface), transparent);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-top, .card-bottom{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .9rem 1rem;
  border-bottom: 1px solid var(--border);
}
.card-bottom{
  border-top: 1px solid var(--border);
  border-bottom: none;
}
.pill{
  padding: .35rem .65rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: .86rem;
  color: var(--muted);
}
.mini{ color: var(--muted2); font-size: .9rem; }
.card-body{ padding: 1rem; }

.fake-ui{
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 10px;
  padding: 12px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 65%, transparent);
  margin-bottom: 1rem;
}
.fake-sidebar{
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.fake-main{
  padding: 8px;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--surface), transparent);
  border: 1px solid var(--border);
}
.fake-line{
  height: 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--text) 12%, transparent);
  margin: 10px 0;
}
.fake-line.w80{ width: 80%; }
.fake-line.w75{ width: 75%; }
.fake-line.w70{ width: 70%; }
.fake-line.w65{ width: 65%; }
.fake-line.w60{ width: 60%; }
.fake-line.w55{ width: 55%; }
.fake-line.w50{ width: 50%; }
.fake-chips{ display:flex; gap: 8px; margin: 10px 0; }
.fake-chips .chip{
  width: 28px; height: 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
}

.badge-row{
  display: flex;
  gap: .45rem;
  flex-wrap: wrap;
}
.badge{
  padding: .35rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: .86rem;
}

.inline-link{
  color: var(--muted);
  text-decoration: none !important;
}
.inline-link:hover{ text-decoration: underline !important; }

.section{
  padding: 3.2rem 0;
}
.section.alt{
  background: linear-gradient(180deg, transparent, color-mix(in oklab, var(--surface) 70%, transparent), transparent);
  border-top: 1px solid color-mix(in oklab, var(--border) 80%, transparent);
  border-bottom: 1px solid color-mix(in oklab, var(--border) 80%, transparent);
}
.section-head{
  margin-bottom: 1.35rem;
}
.section-head h2{
  margin: 0 0 .35rem;
  letter-spacing: -0.01em;
  font-size: 1.75rem;
}
.section-head p{
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.grid{
  display: grid;
  gap: 1rem;
}
.grid.cards{
  grid-template-columns: 1fr;
}
@media (min-width: 860px){
  .grid.cards{ grid-template-columns: repeat(3, 1fr); }
}

.card{
  padding: 1.1rem 1.05rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 12px 36px rgba(0,0,0,.12);
}
.card h3{ margin: 0 0 .35rem; }
.card p{ margin: 0 0 .8rem; color: var(--muted); }
.list{
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted2);
}
.note{
  margin-top: 1.25rem;
  padding: .95rem 1rem;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface2) 60%, transparent);
  color: var(--muted);
}

.timeline{
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  position: relative;
}
.timeline::before{
  content:"";
  position:absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: color-mix(in oklab, var(--border) 70%, transparent);
}
.t-item{
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: .9rem;
  padding: .8rem 0;
}
.t-dot{
  width: 14px;
  height: 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface2) 60%, transparent);
  margin-left: 11px;
  margin-top: .2rem;
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--surface) 55%, transparent);
}
.t-content{
  padding: .9rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}
.t-content h3{ margin: 0 0 .2rem; font-size: 1.1rem; }
.t-content p{ margin: 0; color: var(--muted); }

.pricing{
  grid-template-columns: 1fr;
}
@media (min-width: 980px){
  .pricing{ grid-template-columns: repeat(3, 1fr); }
}

.price-card{
  position: relative;
  padding: 1.1rem 1.05rem;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.price-card header{ margin-bottom: .75rem; }
.price-card h3{ margin: 0 0 .3rem; }
.price{
  margin: 0;
  display:flex;
  align-items: baseline;
  gap: .55rem;
}
.price .amt{
  font-size: 2rem;
  letter-spacing: -0.02em;
  font-weight: 760;
}
.price .per{ color: var(--muted2); }
.price-card .sub{ margin: .35rem 0 0; color: var(--muted); }

.price-card ul{
  margin: .75rem 0 1rem;
  padding-left: 1.1rem;
  color: var(--muted2);
}
.price-card.featured{
  border-color: color-mix(in oklab, var(--border) 55%, #fff 45%);
  background: linear-gradient(180deg, color-mix(in oklab, #fff 16%, transparent), var(--surface));
  transform: translateY(-2px);
}
.ribbon{
  position:absolute;
  top: 12px;
  right: 12px;
  padding: .35rem .6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in oklab, var(--surface2) 70%, transparent);
  color: var(--muted);
  font-size: .85rem;
}

.purchase{
  margin-top: 1.25rem;
}
.purchase-box{
  padding: 1.05rem 1.05rem;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface2), transparent);
}
.purchase-box h3{ margin: 0 0 .3rem; }
.purchase-box p{ margin: 0 0 .9rem; color: var(--muted); }
.purchase-row{
  display:flex;
  gap: .7rem;
  flex-wrap: wrap;
}

.fine{
  font-size: .92rem;
  color: var(--muted2);
  margin: .65rem 0 0;
}

.faq details{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: .8rem 1rem;
  margin-bottom: .8rem;
}
.faq summary{
  cursor: pointer;
  font-weight: 650;
}
.faq .faq-body{
  margin-top: .6rem;
  color: var(--muted);
}
.cta-panel{
  margin-top: 1.2rem;
  padding: 1rem 1.05rem;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in oklab, var(--surface2) 75%, transparent), transparent);
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.cta-panel h3{ margin: 0 0 .25rem; }
.cta-panel p{ margin: 0; color: var(--muted); }

.site-footer{
  padding: 2.2rem 0 1.3rem;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 86%, transparent);
}
.footer-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.3rem;
}
@media (min-width: 980px){
  .footer-grid{ grid-template-columns: 1.35fr .8fr .8fr .8fr; }
}
.footer-brand{ margin-bottom: .5rem; }
.site-footer h4{ margin: 0 0 .45rem; }
.site-footer ul{ list-style:none; margin: 0; padding: 0; }
.site-footer li{ margin: .25rem 0; }
.muted{ color: var(--muted); }

.footer-bottom{
  margin-top: 1.3rem;
  padding-top: 1rem;
  border-top: 1px solid color-mix(in oklab, var(--border) 70%, transparent);
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.inline{ text-decoration: none !important; }
.inline:hover{ text-decoration: underline !important; }

.legal{
  padding: 3.25rem 0 2.5rem;
}
.legal h1{ margin: 0 0 .3rem; font-size: 2rem; }
.legal-card{
  margin: 1rem 0;
  padding: 1rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  background: var(--surface);
}
.legal-card h2{ margin: 0 0 .4rem; font-size: 1.15rem; }
.legal-card p{ margin: 0; color: var(--muted); }

:focus-visible{
  outline: 3px solid color-mix(in oklab, var(--focus) 70%, transparent);
  outline-offset: 2px;
  border-radius: 10px;
}