/* ATP Siege — Landing Page */

:root {
  --bg:       #020a02;
  --bg2:      #061306;
  --green:    #4dff4d;
  --green-dim:#1a6b1a;
  --cyan:     #44aaff;
  --text:     #c8e8c8;
  --text-dim: #6a9a6a;
  --border:   #1a4a1a;
  --accent:   #4dff4d;
  --font:     'Courier New', 'Lucida Console', monospace;
  --radius:   8px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
}

#particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.35;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ── Typography ─────────────────────────────────────────────────────── */
h1 { font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.3; font-weight: normal; }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); color: var(--green); margin-bottom: 2rem; font-weight: normal; letter-spacing: 0.05em; }
h3 { font-size: 1.1rem; color: var(--green); margin-bottom: 0.5rem; }
h4 { font-size: 0.95rem; color: var(--green); margin-bottom: 0.75rem; }
p  { color: var(--text-dim); }

.glow {
  color: var(--green);
  text-shadow: 0 0 20px rgba(77,255,77,0.4);
}

.accent { color: var(--green); }

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn-primary, .btn-secondary, .btn-outline, .btn-sm {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 13px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}
.btn-primary  { background: rgba(0,100,0,0.8); border: 1px solid var(--green); color: var(--green); }
.btn-primary:hover { background: rgba(0,160,0,0.6); box-shadow: 0 0 16px rgba(77,255,77,0.3); }
.btn-secondary { background: transparent; border: 1px solid var(--green-dim); color: var(--text-dim); }
.btn-secondary:hover { border-color: var(--green); color: var(--green); }
.btn-outline  { background: transparent; border: 1px solid var(--green-dim); color: var(--text-dim); }
.btn-outline:hover { border-color: var(--green); color: var(--green); }
.btn-sm       { padding: 6px 14px; background: rgba(0,80,0,0.6); border: 1px solid var(--green-dim); color: var(--text-dim); }
.btn-sm:hover { border-color: var(--green); color: var(--green); }
.btn-large    { padding: 16px 40px; font-size: 15px; }

/* ── Nav ────────────────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(2,10,2,0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { font-size: 1.3rem; letter-spacing: 0.1em; color: var(--text); }
.nav-links { display: flex; gap: 24px; align-items: center; list-style: none; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 13px; transition: color 0.15s; }
.nav-links a:hover { color: var(--green); }

/* ── Hero ───────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 100px 24px 60px;
  position: relative;
}
.hero-content { max-width: 700px; margin: 0 auto; text-align: center; }
.tagline { font-size: 1.1rem; color: var(--text-dim); margin: 1.5rem 0 2rem; letter-spacing: 0.08em; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-sub { margin-top: 1.5rem; font-size: 12px; color: var(--text-dim); opacity: 0.6; }

/* ── Explainer ──────────────────────────────────────────────────────── */
.explainer {
  padding: 80px 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.explainer .container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}
.explainer-card {
  background: rgba(0,20,0,0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}
.explainer-card:hover { border-color: var(--green-dim); }
.explainer-icon { font-size: 2rem; display: block; margin-bottom: 12px; }
.explainer-card p { font-size: 14px; }
.explainer-card em { color: var(--cyan); font-style: normal; }

/* ── How it works ───────────────────────────────────────────────────── */
.how-it-works { padding: 80px 0; }
.flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  flex-wrap: wrap;
}
.flow-step {
  flex: 1;
  min-width: 180px;
  padding: 20px;
  background: rgba(0,20,0,0.4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.flow-step p { font-size: 13px; margin-top: 8px; }
.flow-num { font-size: 2rem; color: var(--green-dim); font-weight: bold; margin-bottom: 8px; opacity: 0.6; }
.flow-arrow {
  display: flex;
  align-items: center;
  padding: 20px 8px;
  color: var(--green-dim);
  font-size: 1.5rem;
  flex-shrink: 0;
}

/* ── Gene spotlight ─────────────────────────────────────────────────── */
.spotlight {
  padding: 80px 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.gene-card {
  display: flex;
  gap: 32px;
  background: rgba(0,30,0,0.6);
  border: 1px solid var(--green-dim);
  border-radius: var(--radius);
  padding: 32px;
  flex-wrap: wrap;
}
.gene-symbol {
  font-size: 4rem;
  color: var(--green);
  text-shadow: 0 0 30px rgba(77,255,77,0.4);
  letter-spacing: -2px;
  min-width: 140px;
  display: flex;
  align-items: center;
}
.gene-info { flex: 1; min-width: 200px; }
.gene-info h3 { font-size: 1.2rem; margin-bottom: 12px; }
.gene-function { font-size: 14px; margin-bottom: 16px; color: var(--text); }
.gene-stats { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 12px; }
.stat { font-size: 12px; color: var(--text-dim); border: 1px solid var(--border); padding: 4px 10px; border-radius: 4px; }
.stat strong { color: var(--green); }
.gene-cite { font-size: 11px; color: var(--text-dim); opacity: 0.5; }

/* ── Schools ────────────────────────────────────────────────────────── */
.schools { padding: 80px 0; }
.schools .container { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center; }
.schools-text h2 { color: var(--green); }
.school-features { list-style: none; margin: 1.5rem 0; }
.school-features li { padding: 6px 0; color: var(--text-dim); font-size: 14px; border-bottom: 1px solid rgba(26,74,26,0.3); }
.schools-visual { display: flex; flex-direction: column; gap: 12px; }
.curriculum-badge {
  background: rgba(0,40,0,0.6);
  border: 1px solid var(--green-dim);
  border-radius: 6px;
  padding: 10px 20px;
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  text-align: center;
}

/* ── Pricing ────────────────────────────────────────────────────────── */
.pricing {
  padding: 80px 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 2rem;
}
.price-card {
  background: rgba(0,20,0,0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: border-color 0.2s;
}
.price-card.featured { border-color: var(--green); }
.price-card:hover { border-color: var(--green-dim); }
.price-card h3 { color: var(--text); font-size: 1rem; margin-bottom: 8px; }
.price { font-size: 2.5rem; color: var(--green); margin: 12px 0; }
.price span { font-size: 1rem; color: var(--text-dim); }
.price-card ul { list-style: none; margin: 16px 0 24px; }
.price-card li { padding: 6px 0; font-size: 13px; color: var(--text-dim); border-bottom: 1px solid rgba(26,74,26,0.3); }
.price-card li::before { content: "→ "; color: var(--green-dim); }
.badge {
  position: absolute;
  top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--green);
  color: var(--bg);
  font-size: 11px;
  padding: 2px 12px;
  border-radius: 4px;
  white-space: nowrap;
}

/* ── Final CTA ──────────────────────────────────────────────────────── */
.final-cta {
  padding: 100px 0;
  text-align: center;
}
.final-cta h2 { font-size: 2.5rem; }
.final-cta p { margin: 1rem 0 2.5rem; font-size: 1rem; }

/* ── Footer ─────────────────────────────────────────────────────────── */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px;
  align-items: start;
}
.footer-brand p { font-size: 13px; color: var(--text-dim); margin-top: 8px; }
.footer-links { display: flex; gap: 48px; }
.footer-links div { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: var(--text-dim); font-size: 13px; text-decoration: none; }
.footer-links a:hover { color: var(--green); }
.footer-bottom {
  margin-top: 48px;
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  color: var(--text-dim);
  opacity: 0.5;
}
.footer-bottom a { color: var(--text-dim); }

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .flow-arrow { display: none; }
  .flow-step  { min-width: 100%; }
  .schools .container { grid-template-columns: 1fr; }
  .schools-visual { flex-direction: row; flex-wrap: wrap; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; gap: 32px; }
  .nav-links li:not(:last-child) { display: none; }
}

/* ── Scrollbar ──────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--green-dim); border-radius: 3px; }