/* mem20 — global design system */
:root{
  --bg:#0a0e17;
  --bg-alt:#0f1420;
  --bg-card:#131926;
  --bg-elev:#1a2130;
  --border:#1f2a3d;
  --border-bright:#2a3a55;
  --text:#d8e0ec;
  --text-dim:#8892a6;
  --text-muted:#5c6678;
  --accent:#00ff88;
  --accent-dim:#00cc6a;
  --accent-glow:rgba(0,255,136,.15);
  --accent-glow-strong:rgba(0,255,136,.3);
  --warn:#ffcc00;
  --danger:#ff4466;
  --purple:#8b5cf6;
  --blue:#3b82f6;
  --mono:'SF Mono','Fira Code','Cascadia Code',ui-monospace,monospace;
  --sans:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* --- layout --- */
.wrap{max-width:1140px;margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:880px;margin:0 auto;padding:0 24px}
section{padding:80px 0}
.section-label{
  display:inline-block;
  font-family:var(--mono);
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:12px;
}
h1,h2,h3,h4{line-height:1.2;font-weight:700}
h1{font-size:clamp(2.4rem,5vw,3.8rem);letter-spacing:-.02em}
h2{font-size:clamp(1.8rem,3.5vw,2.6rem);margin-bottom:20px}
h3{font-size:1.25rem;margin-bottom:8px}
p{color:var(--text-dim);margin-bottom:16px}
a{color:var(--accent);text-decoration:none;transition:color .15s}
a:hover{color:var(--accent-dim)}
.mono{font-family:var(--mono)}
.dim{color:var(--text-dim)}
.muted{color:var(--text-muted)}

/* --- nav --- */
.nav{
  position:fixed;top:0;left:0;right:0;
  z-index:100;
  background:rgba(10,14,23,.82);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:60px;max-width:1140px;margin:0 auto;padding:0 24px;
}
.nav-logo{font-family:var(--mono);font-size:.9rem;font-weight:700;color:var(--accent)}
.nav-logo span{color:var(--text-dim);font-weight:400}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:.85rem;color:var(--text-dim);transition:color .15s}
.nav-links a:hover{color:var(--accent)}
.nav-cta{
  font-family:var(--mono);
  font-size:.78rem;
  padding:6px 16px;
  border:1px solid var(--accent);
  border-radius:6px;
  color:var(--accent);
  transition:all .2s;
}
.nav-cta:hover{background:var(--accent);color:var(--bg)}
@media(max-width:720px){
  .nav-links{display:none}
}

/* --- hero --- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;justify-content:center;
  text-align:center;
  padding:120px 24px 80px;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%,var(--accent-glow) 0%,transparent 70%),
    radial-gradient(circle at 20% 80%,rgba(139,92,246,.08) 0%,transparent 50%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;max-width:800px}
.hero-badge{
  display:inline-block;
  font-family:var(--mono);
  font-size:.72rem;
  padding:4px 14px;
  border:1px solid var(--border-bright);
  border-radius:20px;
  color:var(--text-dim);
  margin-bottom:32px;
}
.hero-badge .dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--accent);margin-right:8px;
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}
.hero h1{margin-bottom:24px}
.hero h1 .hl{color:var(--accent)}
.hero-sub{
  font-size:1.15rem;
  color:var(--text-dim);
  max-width:600px;
  margin:0 auto 40px;
}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);
  font-size:.85rem;
  padding:12px 28px;
  border-radius:8px;
  cursor:pointer;
  transition:all .2s;
  border:none;
}
.btn-primary{
  background:var(--accent);
  color:var(--bg);
  font-weight:600;
  box-shadow:0 0 24px var(--accent-glow-strong);
}
.btn-primary:hover{
  background:var(--accent-dim);
  box-shadow:0 0 32px var(--accent-glow-strong);
  transform:translateY(-1px);
}
.btn-outline{
  background:transparent;
  color:var(--text);
  border:1px solid var(--border-bright);
}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}

/* --- stats bar --- */
.stats-bar{
  display:flex;justify-content:center;gap:48px;
  padding:40px 24px;
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  background:var(--bg-alt);
}
.stat{text-align:center}
.stat-val{
  font-family:var(--mono);
  font-size:1.6rem;
  font-weight:700;
  color:var(--accent);
}
.stat-label{
  font-size:.78rem;
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:.08em;
}
@media(max-width:600px){
  .stats-bar{flex-wrap:wrap;gap:24px}
}

/* --- features grid --- */
.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin-top:40px}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:12px;
  padding:28px;
  transition:border-color .2s,transform .2s;
}
.feature-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.feature-icon{
  font-size:1.4rem;
  margin-bottom:12px;
  display:inline-block;
}
.feature-card h3{font-size:1.05rem;margin-bottom:8px}
.feature-card p{font-size:.9rem;margin:0}

/* --- page header (for subpages) --- */
.page-header{
  padding:140px 24px 60px;
  text-align:center;
  border-bottom:1px solid var(--border);
  background:var(--bg-alt);
}
.page-header h1{margin-bottom:12px}
.page-header p{max-width:600px;margin:0 auto;font-size:1.05rem}

/* --- content sections --- */
.content-section{padding:60px 0}
.content-section h2{margin-bottom:16px}
.content-section ul{list-style:none;padding:0}
.content-section li{
  padding:12px 0;
  border-bottom:1px solid var(--border);
  color:var(--text-dim);
}
.content-section li:last-child{border-bottom:none}
.content-section li strong{color:var(--text)}

/* --- callout boxes --- */
.callout{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-left:3px solid var(--accent);
  border-radius:8px;
  padding:20px 24px;
  margin:24px 0;
}
.callout-warn{border-left-color:var(--warn)}
.callout-danger{border-left-color:var(--danger)}
.callout p{margin-bottom:8px;font-size:.92rem}
.callout p:last-child{margin-bottom:0}
.callout-title{font-family:var(--mono);font-size:.8rem;color:var(--accent);margin-bottom:8px}

/* --- code blocks --- */
pre{
  background:#080c14;
  border:1px solid var(--border);
  border-radius:8px;
  padding:20px;
  overflow-x:auto;
  font-family:var(--mono);
  font-size:.82rem;
  line-height:1.6;
  color:var(--text);
  margin:16px 0;
}
code{
  font-family:var(--mono);
  font-size:.85em;
  background:var(--bg-elev);
  padding:2px 6px;
  border-radius:4px;
}
pre code{background:none;padding:0}

/* --- tables --- */
table{width:100%;border-collapse:collapse;margin:24px 0}
th,td{
  text-align:left;
  padding:12px 16px;
  border-bottom:1px solid var(--border);
  font-size:.9rem;
}
th{color:var(--text);font-family:var(--mono);font-size:.78rem;text-transform:uppercase;letter-spacing:.06em}
td{color:var(--text-dim)}

/* --- roadmap timeline --- */
.timeline{position:relative;max-width:800px;margin:0 auto}
.timeline::before{
  content:'';position:absolute;
  left:16px;top:0;bottom:0;
  width:2px;background:var(--border);
}
.timeline-item{
  position:relative;
  padding-left:48px;
  margin-bottom:40px;
}
.timeline-item::before{
  content:'';position:absolute;
  left:10px;top:6px;
  width:14px;height:14px;border-radius:50%;
  background:var(--bg);
  border:2px solid var(--text-muted);
  z-index:1;
}
.timeline-item.done::before{border-color:var(--accent);background:var(--accent)}
.timeline-item.in-progress::before{border-color:var(--warn);background:var(--warn)}
.timeline-item.planned::before{border-color:var(--text-muted)}
.timeline-phase{
  font-family:var(--mono);
  font-size:.72rem;
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:.1em;
  margin-bottom:6px;
}
.timeline-title{font-size:1.05rem;font-weight:600;margin-bottom:4px}
.timeline-desc{font-size:.88rem;color:var(--text-dim)}

/* --- contributors grid --- */
.contrib-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin-top:32px}
.contrib-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:10px;
  padding:24px;
  text-align:center;
  transition:border-color .2s;
}
.contrib-card:hover{border-color:var(--accent)}
.contrib-avatar{
  width:56px;height:56px;
  border-radius:50%;
  background:var(--bg-elev);
  border:2px solid var(--accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);
  font-size:1rem;
  color:var(--accent);
  margin:0 auto 12px;
}
.contrib-name{font-weight:600;margin-bottom:4px}
.contrib-role{font-size:.82rem;color:var(--text-muted);margin-bottom:8px}
.contrib-bio{font-size:.82rem;color:var(--text-dim)}

/* --- form --- */
.form-wrap{max-width:480px;margin:0 auto}
.form-group{margin-bottom:20px}
.form-label{
  display:block;
  font-family:var(--mono);
  font-size:.78rem;
  color:var(--text-dim);
  margin-bottom:6px;
}
.form-input,.form-select,.form-textarea{
  width:100%;
  background:var(--bg-card);
  border:1px solid var(--border-bright);
  border-radius:8px;
  padding:12px 16px;
  color:var(--text);
  font-family:var(--sans);
  font-size:.92rem;
  transition:border-color .15s;
}
.form-input:focus,.form-select:focus,.form-textarea:focus{
  outline:none;border-color:var(--accent);
}
.form-textarea{min-height:120px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:500px){.form-row{grid-template-columns:1fr}}

/* --- footer --- */
.footer{
  border-top:1px solid var(--border);
  padding:40px 24px;
  text-align:center;
  background:var(--bg-alt);
}
.footer-inner{
  max-width:1140px;margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:16px;
}
.footer-links{display:flex;gap:24px}
.footer-links a{font-size:.85rem;color:var(--text-muted);transition:color .15s}
.footer-links a:hover{color:var(--accent)}
.footer-copy{font-size:.78rem;color:var(--text-muted)}

/* --- responsive --- */
@media(max-width:768px){
  section{padding:60px 0}
  .hero{min-height:auto;padding:100px 24px 60px}
  h1{font-size:2rem}
}

/* --- utility --- */
.text-center{text-align:center}
.mt-24{margin-top:24px}
.mt-40{margin-top:40px}
.mb-24{margin-bottom:24px}
.mb-40{margin-bottom:40px}