/* ── Atlas Cortex — atlascortex.dev ── */
/* Design tokens */
:root {
  --bg:        #0a0a0a;
  --bg-card:   #1e293b;
  --bg-card-h: #243247;
  --border:    #334155;
  --text:      #e4e4e7;
  --text-dim:  #8b8b94;
  --accent:    #22d3ee;
  --accent-h:  #67e8f9;
  --aurora:    #a78bfa;
  --aurora-h:  #c4b5fd;
  --radius:    12px;
  --max-w:     1140px;
  --font:      'Inter', system-ui, -apple-system, sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: opacity .2s; }
a:hover { opacity: .8; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ── Utilities ── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0; }
.section-label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.section-desc {
  color: var(--text-dim);
  max-width: 600px;
  font-size: 1.05rem;
}

/* ── Scroll animations ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(10,10,10,.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background .3s;
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.nav-brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.nav-brand svg { flex-shrink: 0; }
.nav-links { display: flex; gap: 1.75rem; align-items: center; }
.nav-links a {
  color: var(--text-dim);
  font-size: .875rem;
  font-weight: 500;
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); opacity: 1; }
.nav-cta {
  background: var(--aurora);
  color: #fff !important;
  padding: .45rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: .85rem;
  transition: background .2s, transform .15s;
}
.nav-cta:hover { background: var(--aurora-h); transform: translateY(-1px); opacity: 1 !important; }

/* Mobile menu */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: transform .3s, opacity .3s;
}
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: 60px 0 0 0;
    background: rgba(10,10,10,.97);
    backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 2rem 1.5rem;
    gap: 1.5rem;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.16,1,.3,1);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 1.1rem; }
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 60px;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(34,211,238,.08) 0%, rgba(167,139,250,.04) 40%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  text-align: center;
  max-width: 740px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(34,211,238,.08);
  border: 1px solid rgba(34,211,238,.2);
  border-radius: 100px;
  padding: .4rem 1rem;
  font-size: .8rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

/* Hero logo */
.hero-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto 2rem;
  animation: neural-pulse 4s ease-in-out infinite;
}
.hero-logo svg { width: 100%; height: 100%; display: block; }
@keyframes neural-pulse {
  0%, 100% { filter: drop-shadow(0 0 12px rgba(34,211,238,0.25)); }
  50% { filter: drop-shadow(0 0 28px rgba(167,139,250,0.45)); }
}
.hero-title {
  font-size: clamp(2.75rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.05;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-dim) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 2rem;
  line-height: 1.5;
}
.hero-pills {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero-pill {
  display: flex;
  align-items: center;
  gap: .4rem;
  color: var(--text);
  font-size: .9rem;
  font-weight: 500;
}
.hero-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.75rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: .95rem;
  transition: transform .15s, box-shadow .2s;
  border: none;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); opacity: 1 !important; }
.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  box-shadow: 0 0 24px rgba(34,211,238,.2);
}
.btn-primary:hover { box-shadow: 0 0 32px rgba(34,211,238,.35); }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--text-dim); }

/* ── Products grid ── */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}
@media (max-width: 768px) {
  .products-grid { grid-template-columns: 1fr; }
}
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color .3s, transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--aurora), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.product-card:hover {
  border-color: rgba(34,211,238,.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}
.product-card:hover::before { opacity: 1; }

.product-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.25rem;
}
.product-icon.cortex  { background: rgba(34,211,238,.12); color: var(--accent); }
.product-icon.sight   { background: rgba(167,139,250,.12); color: var(--aurora); }
.product-icon.cli     { background: rgba(52,211,153,.12); color: #34d399; }
.product-icon.learner { background: rgba(167,139,250,.08); color: var(--aurora-h); }

.product-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: .25rem;
}
.product-subtitle {
  color: var(--accent);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.product-card ul { margin-top: .75rem; }
.product-card li {
  color: var(--text-dim);
  font-size: .9rem;
  padding: .3rem 0;
  padding-left: 1.25rem;
  position: relative;
}
.product-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: .7rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .5;
}

/* ── Architecture ── */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-top: 2.5rem;
  overflow-x: auto;
}
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  flex-wrap: wrap;
  font-size: .9rem;
  min-width: max-content;
}
.arch-node {
  padding: .6rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  white-space: nowrap;
}
.arch-node.engine  { background: rgba(34,211,238,.12); color: var(--accent); border: 1px solid rgba(34,211,238,.25); }
.arch-node.router  { background: rgba(167,139,250,.1); color: var(--aurora); border: 1px solid rgba(167,139,250,.25); }
.arch-node.pipe    { background: rgba(52,211,153,.1); color: #34d399; border: 1px solid rgba(52,211,153,.25); }
.arch-arrow { color: var(--text-dim); font-size: 1.1rem; flex-shrink: 0; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: .4rem;
}
.stat-label {
  font-size: .8rem;
  color: var(--text-dim);
  font-weight: 500;
}

/* ── Privacy ── */
.privacy-section {
  text-align: center;
}
.privacy-section .section-desc {
  margin: 0 auto 2.5rem;
}
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
@media (max-width: 768px) {
  .privacy-grid { grid-template-columns: repeat(2, 1fr); }
}
.privacy-card {
  padding: 1.75rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color .3s;
}
.privacy-card:hover { border-color: rgba(34,211,238,.3); }
.privacy-card-icon {
  font-size: 1.75rem;
  margin-bottom: .75rem;
}
.privacy-card h4 {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: .4rem;
}
.privacy-card p {
  font-size: .82rem;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ── Tech specs ── */
.specs-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.specs-table th,
.specs-table td {
  text-align: left;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  font-size: .9rem;
}
.specs-table th {
  color: var(--text-dim);
  font-weight: 600;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: rgba(255,255,255,.02);
}
.specs-table tr:last-child td { border-bottom: none; }
.specs-table td:first-child { font-weight: 600; white-space: nowrap; }
.spec-tag {
  display: inline-block;
  background: rgba(34,211,238,.08);
  color: var(--accent);
  padding: .15rem .5rem;
  border-radius: 4px;
  font-size: .78rem;
  font-weight: 500;
  margin: .15rem .25rem .15rem 0;
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer-brand p {
  color: var(--text-dim);
  font-size: .82rem;
  max-width: 340px;
  margin-top: .5rem;
  line-height: 1.6;
}
.footer-links { display: flex; gap: 2.5rem; }
.footer-col h5 {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-dim);
  margin-bottom: .75rem;
}
.footer-col a {
  display: block;
  color: var(--text-dim);
  font-size: .85rem;
  padding: .25rem 0;
  transition: color .2s;
}
.footer-col a:hover { color: var(--accent); opacity: 1; }
.footer-legal {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
}
.footer-legal p {
  color: var(--text-dim);
  font-size: .75rem;
  line-height: 1.8;
}

/* ── Open Source links ── */
.privacy-card a { color: var(--accent); }
.privacy-card a:hover { color: var(--accent-h); }

/* ── Privacy page ── */
.page-header {
  padding: 8rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.prose {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 6rem;
}
.prose h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.5rem 0 .75rem;
}
.prose p,
.prose li {
  color: var(--text-dim);
  font-size: .95rem;
  line-height: 1.8;
  margin-bottom: .75rem;
}
.prose ul {
  margin: .5rem 0 1rem 1.25rem;
  list-style: disc;
}
.prose strong { color: var(--text); }