/* =========================================================
   Ragolith — minimalist landing page
   Palette inspired by lunar regolith: charcoal void, warm
   dust, and a single sandy accent reflecting sunlit terrain.
   ========================================================= */

:root {
  --bg:            #0a0a0c;
  --bg-elev:       #111116;
  --surface:       #15151c;
  --surface-2:     #1c1c25;
  --border:        #25252e;
  --border-bright: #3a3a48;

  --text:          #ebe6da;
  --text-dim:      #8e887d;
  --text-faint:    #4e4a44;

  --accent:        #d4b076;
  --accent-bright: #e8c995;
  --accent-soft:   rgba(212, 176, 118, 0.10);
  --accent-line:   rgba(212, 176, 118, 0.30);

  --font-sans:    'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  --max-w:   1120px;
  --gutter:  clamp(1.25rem, 4vw, 3rem);
  --radius:  4px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

::selection { background: var(--accent-soft); color: var(--accent-bright); }

a { color: inherit; text-decoration: none; }
a:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.92em;
}

code {
  color: var(--accent-bright);
  background: var(--accent-soft);
  padding: 0.05em 0.4em;
  border-radius: 3px;
  border: 1px solid var(--border);
}

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

/* =========================================================
   Atmospheric layers — moon glow, faint stars, film grain
   ========================================================= */

.moonglow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% -10%, rgba(212, 176, 118, 0.10), transparent 60%),
    radial-gradient(ellipse 90% 70% at 110% 110%, rgba(120, 140, 180, 0.05), transparent 65%),
    radial-gradient(ellipse 70% 60% at -10% 30%, rgba(212, 176, 118, 0.04), transparent 60%);
}

.stars {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
  background-image:
    radial-gradient(1px 1px at 7% 12%,  #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 23% 38%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 41% 7%,  #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 58% 22%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 73% 9%,  #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 88% 30%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 17% 55%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 33% 78%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 52% 64%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 71% 89%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 84% 71%, #fff 50%, transparent 51%),
    radial-gradient(1px 1px at 95% 45%, #fff 50%, transparent 51%),
    radial-gradient(2px 2px at 12% 80%, rgba(255,255,255,0.6) 50%, transparent 51%),
    radial-gradient(2px 2px at 65% 40%, rgba(255,255,255,0.5) 50%, transparent 51%),
    radial-gradient(2px 2px at 39% 92%, rgba(255,255,255,0.5) 50%, transparent 51%);
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1   0 0 0 0 1   0 0 0 0 1   0 0 0 1 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* =========================================================
   Layout primitives
   ========================================================= */

main, .site-header, .site-footer {
  position: relative;
  z-index: 2;
}

section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: clamp(4rem, 10vw, 8rem) var(--gutter);
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--text);
}

.section-lead {
  color: var(--text-dim);
  max-width: 52ch;
  margin: 0 0 3rem;
  font-size: 1.05rem;
}

/* =========================================================
   Header / nav
   ========================================================= */

.site-header {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.22em;
  font-size: 0.88rem;
  color: var(--text);
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #f0d8a8 0%, #b8924f 55%, #5a4426 100%);
  box-shadow:
    inset -2px -2px 4px rgba(0,0,0,0.5),
    0 0 18px rgba(212, 176, 118, 0.35);
  position: relative;
}
.brand-mark::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 70% 65%, rgba(0,0,0,0.25) 1px, transparent 2px),
    radial-gradient(circle at 35% 75%, rgba(0,0,0,0.2) 1px, transparent 2px),
    radial-gradient(circle at 55% 30%, rgba(0,0,0,0.15) 0.5px, transparent 1.5px);
}

.brand-text { display: inline-block; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.site-nav a {
  font-size: 0.88rem;
  color: var(--text-dim);
  font-weight: 500;
  transition: color 0.15s ease;
}
.site-nav a:hover { color: var(--text); }
.site-nav .nav-github {
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.02);
  transition: border-color 0.2s ease, background 0.2s ease;
}
.site-nav .nav-github:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-bright);
}

@media (max-width: 640px) {
  .site-nav { gap: 1.1rem; }
  .site-nav a:not(.nav-github) { display: none; }
}

/* =========================================================
   Hero
   ========================================================= */

.hero {
  text-align: center;
  padding-top: clamp(3rem, 8vw, 6rem);
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 0 0 1.5rem;
  color: var(--text);
  background: linear-gradient(180deg, var(--text) 0%, #b6b1a6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  color: var(--text-dim);
  max-width: 56ch;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: 0.9rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  cursor: pointer;
  font-family: inherit;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}
.btn-primary:hover {
  background: var(--accent-bright);
  border-color: var(--accent-bright);
  color: var(--bg);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-bright);
}
.btn-ghost:hover {
  border-color: var(--accent-line);
  color: var(--accent-bright);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.hero-art {
  margin: 0 auto;
  max-width: 760px;
  padding: 0;
  position: relative;
}
.hero-art img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow:
    0 30px 80px -20px rgba(0,0,0,0.7),
    0 0 0 1px rgba(255,255,255,0.02) inset;
}
.hero-art::before,
.hero-art::after {
  content: '';
  position: absolute;
  pointer-events: none;
}
.hero-art::before {
  inset: -1px;
  border-radius: 9px;
  background: linear-gradient(180deg, rgba(212,176,118,0.25), transparent 40%);
  z-index: -1;
  filter: blur(20px);
  opacity: 0.6;
}

/* =========================================================
   Pillars
   ========================================================= */

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.pillar {
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg-elev) 100%);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2rem 1.75rem 2.25rem;
  position: relative;
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.pillar:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}
.pillar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  opacity: 0.6;
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.16em;
  margin-bottom: 1.75rem;
}

.pillar h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0 0 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.pillar p {
  color: var(--text-dim);
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.65;
}

@media (max-width: 880px) {
  .pillars-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   How it works
   ========================================================= */

.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem 3rem;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.how-step {
  position: relative;
  padding-top: 1.5rem;
}
.how-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
}

.how-step-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.18em;
}

.how-step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.how-step p {
  color: var(--text-dim);
  margin: 0;
  font-size: 0.95rem;
}

@media (max-width: 880px) {
  .how-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}

/* =========================================================
   Features
   ========================================================= */

.features-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem 2.5rem;
}

.features-list li {
  padding: 1.25rem 0 1.25rem 1.5rem;
  border-left: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.97rem;
  line-height: 1.6;
  transition: border-color 0.2s ease;
}
.features-list li:hover { border-left-color: var(--accent); }

.features-list strong {
  color: var(--text);
  font-weight: 600;
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: -0.005em;
}

@media (max-width: 720px) {
  .features-list { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* =========================================================
   Quick start
   ========================================================= */

.code-frame {
  margin-top: 2.5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}
.code-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: 6px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.code-frame-bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.code-frame-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-bright);
}

.code-frame .code {
  margin: 0;
  padding: 1.5rem;
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.7;
  background: transparent;
  border: none;
  overflow-x: auto;
}
.code-frame .code .c {
  color: var(--text-faint);
  font-style: italic;
}

.quickstart-foot {
  margin: 1.75rem 0 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.quickstart-foot code {
  font-size: 0.88em;
}

/* =========================================================
   Final CTA
   ========================================================= */

.cta {
  text-align: center;
  padding-bottom: clamp(5rem, 12vw, 9rem);
}

.cta h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  letter-spacing: -0.02em;
  font-weight: 600;
  margin: 0 0 1rem;
  background: linear-gradient(180deg, var(--text) 0%, #b6b1a6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta p {
  color: var(--text-dim);
  margin: 0 auto 2rem;
  max-width: 44ch;
}

.cta .hero-actions { margin-bottom: 0; }

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2.5rem var(--gutter) 4rem;
  border-top: 1px solid var(--border);
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-dim);
  font-size: 0.88rem;
  font-family: var(--font-mono);
}
.footer-meta a:hover { color: var(--accent-bright); }
.footer-meta .dot { color: var(--text-faint); }

.footer-tagline {
  margin-top: 1.25rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-faint);
  letter-spacing: 0.04em;
}

/* =========================================================
   Reveal-on-scroll (progressive enhancement)
   ========================================================= */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}