:root {
  /* deep reef palette */
  --bg: #071312;
  --bg-elev: #0d1f1e;
  --bg-elev-2: #142e2c;
  --text: #eaf3f0;
  --text-dim: rgb(134, 172, 165);
  --text-faint: #4d6e69;
  --border: #1e3634;
  --coral: #ff8562;
  --coral-soft: #ffab8c;
  --coral-dim: rgba(255,133,98,0.14);
  --teal: #43d9c8;
  --teal-dim: rgba(67,217,200,0.12);
}
*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--bg); color:var(--text); font-family:'Inter',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; min-height:100vh; position:relative; overflow-x:hidden;
}
a{ color:inherit; }
.wrap{ max-width:760px; margin:0 auto; padding:0 24px; position:relative; }

/* ambient caustic light — signature backdrop, quiet and slow */
.tide{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(ellipse 60% 40% at 20% 15%, var(--teal-dim), transparent 60%),
    radial-gradient(ellipse 50% 35% at 80% 8%, var(--coral-dim), transparent 60%);
  animation: drift 26s ease-in-out infinite alternate;
}
@keyframes drift{
  0%{ transform:translate(0,0) scale(1); }
  100%{ transform:translate(-2%, 3%) scale(1.05); }
}
@media (prefers-reduced-motion: reduce){ .tide{ animation:none; } }

nav, header, section, footer{ position:relative; z-index:1; }

nav.wrap{ display:flex; align-items:center; justify-content:space-between; padding:28px 24px; }
.logo{ font-family:'JetBrains Mono',monospace; font-weight:600; font-size:14px; display:flex; align-items:center; gap:8px; }
.logo-dot{ width:7px; height:7px; border-radius:50%; background:var(--coral); box-shadow:0 0 9px var(--coral); }
.nav-links{ display:flex; gap:22px; font-size:13px; color:var(--text-dim); }
.nav-links a{ text-decoration:none; }
.nav-links a:hover{ color:var(--text); }

/* depth gauge — signature element: scroll position rendered as diving depth */
.gauge{
  position:fixed; right:22px; top:50%; transform:translateY(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px;
  z-index:5;
}
.gauge-track{ position:relative; width:2px; height:180px; background:var(--border); border-radius:2px; overflow:visible; }
.gauge-fill{ position:absolute; top:0; left:0; width:100%; height:0%; background:linear-gradient(var(--teal), var(--coral)); border-radius:2px; }
.gauge-marker{ position:absolute; left:50%; top:0%; width:8px; height:8px; border-radius:50%; background:var(--coral); box-shadow:0 0 8px var(--coral); transform:translate(-50%,-50%); }
.gauge-label{ font-family:'JetBrains Mono',monospace; font-size:10.5px; color:var(--text-faint); writing-mode:vertical-rl; letter-spacing:0.02em; }
@media (max-width:900px){ .gauge{ display:none; } }

.hero{ padding:52px 0 40px; text-align:center; }
.hero-eyebrow{ font-family:'JetBrains Mono',monospace; font-size:11.5px; letter-spacing:0.06em; text-transform:uppercase; color:var(--teal); margin-bottom:16px; }
h1{ font-family:'Fraunces',serif; font-optical-sizing:auto; font-weight:560; font-size:clamp(30px,5vw,44px); margin:0 0 18px; line-height:1.2; letter-spacing:-0.01em; }
.tag-chip{ background:var(--bg-elev-2); border:1px solid var(--border); border-radius:6px; padding:2px 10px; font-family:'JetBrains Mono',monospace; font-size:0.62em; font-weight:500; color:var(--coral-soft); }
.sub{ font-size:15.5px; color:var(--text-dim); max-width:480px; margin:0 auto 36px; line-height:1.6; }
.trigger{ display:flex; align-items:center; gap:10px; max-width:440px; margin:0 auto; background:var(--bg-elev); border:1px solid var(--border); border-radius:10px; padding:12px 14px; cursor:pointer; transition:border-color .15s, background .15s; }
.trigger:hover{ border-color:var(--teal); background:var(--bg-elev-2); }
.trigger svg{ flex-shrink:0; opacity:0.55; }
.trigger-text{ flex:1; text-align:left; color:var(--text-faint); font-size:14px; }
.kbd-hint{ font-family:'JetBrains Mono',monospace; font-size:11px; color:var(--text-dim); background:var(--bg-elev-2); border:1px solid var(--border); border-radius:5px; padding:2px 6px; }
.cta{ display:flex; gap:14px; margin-top:18px; flex-wrap:wrap; justify-content:center; }
.btn{ font-family:'Inter',sans-serif; font-weight:500; font-size:13.5px; border-radius:8px; padding:9px 16px; cursor:pointer; border:1px solid transparent; transition:transform .12s ease,background .15s; }
.btn:active{ transform:scale(0.97); }
.btn-primary{ background:var(--coral); color:#1a0d08; }
.btn-primary:hover{ background:var(--coral-soft); }
.btn-ghost{ background:transparent; border-color:var(--border); color:var(--text-dim); }
.btn-ghost:hover{ color:var(--text); border-color:var(--teal); }

/* stats */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:0; margin:56px auto 10px; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.stat{ padding:26px 16px; text-align:center; border-left:1px solid var(--border); }
.stat:first-child{ border-left:none; }
.stat-num{ font-family:'Fraunces',serif; font-optical-sizing:auto; font-weight:560; font-size:26px; color:var(--teal); }
.stat-label{ font-size:12px; color:var(--text-dim); margin-top:6px; }
.stats-note{ text-align:center; font-size:11px; color:var(--text-faint); margin:0 0 52px; font-family:'JetBrains Mono',monospace; }

.features{ display:grid; grid-template-columns:repeat(3,1fr); border-bottom:1px solid var(--border); margin:0 auto 60px; }
.feature{ padding:28px 20px; border-left:1px solid var(--border); }
.feature:first-child{ border-left:none; }
.feature h3{ font-family:'JetBrains Mono',monospace; font-size:13px; margin:0 0 8px; }
.feature p{ font-size:13px; color:var(--text-dim); margin:0; line-height:1.55; }

.section-head{ margin-bottom:28px; }
.section-head h2{ font-family:'Fraunces',serif; font-optical-sizing:auto; font-weight:500; font-size:24px; margin:6px 0 0; }
.code-label{ font-size:12px; color:var(--text-faint); font-family:'JetBrains Mono',monospace; letter-spacing:0.02em; }

/* how it works — a real 3-step sequence, numbering earns its keep here */
.how{ margin-bottom:64px; }
.how-steps{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.how-step{ background:var(--bg-elev); border:1px solid var(--border); border-radius:12px; padding:22px; }
.how-index{ font-family:'JetBrains Mono',monospace; font-size:12px; color:var(--coral); margin-bottom:10px; }
.how-step h3{ font-family:'Fraunces',serif; font-weight:500; font-size:17px; margin:0 0 8px; }
.how-step p{ font-size:13px; color:var(--text-dim); line-height:1.55; margin:0; }

/* compare table */
.compare{ margin-bottom:64px; }
.compare-table{ width:100%; border-collapse:collapse; font-size:13.5px; border:1px solid var(--border); border-radius:12px; overflow:hidden; }
.compare-table th, .compare-table td{ padding:13px 16px; text-align:left; border-bottom:1px solid var(--border); }
.compare-table th{ font-family:'JetBrains Mono',monospace; font-size:11.5px; color:var(--text-faint); font-weight:500; background:var(--bg-elev); }
.compare-table tbody tr:last-child td{ border-bottom:none; }
.compare-table td:first-child{ color:var(--text-dim); }
.compare-table td.good{ color:var(--teal); }

.code-section{ margin-bottom:64px; }
.code-block{ background:var(--bg-elev); border:1px solid var(--border); border-radius:10px; padding:16px 18px; font-family:'JetBrains Mono',monospace; font-size:12.5px; color:var(--coral-soft); position:relative; }
.copy-btn{ position:absolute; top:10px; right:10px; background:var(--bg-elev-2); border:1px solid var(--border); color:var(--text-dim); font-size:11px; border-radius:6px; padding:5px 9px; cursor:pointer; }
.copy-btn:hover{ color:var(--text); }

/* faq */
.faq{ margin-bottom:64px; }
.faq-list{ display:flex; flex-direction:column; gap:10px; }
.faq-item{ background:var(--bg-elev); border:1px solid var(--border); border-radius:10px; padding:14px 18px; }
.faq-item summary{ cursor:pointer; font-size:14px; font-weight:500; list-style:none; }
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::before{ content:'+'; color:var(--coral); margin-right:10px; font-family:'JetBrains Mono',monospace; }
.faq-item[open] summary::before{ content:'–'; }
.faq-item p{ font-size:13px; color:var(--text-dim); margin:10px 0 0; line-height:1.55; }

footer{ padding:20px 0 48px; text-align:center; font-size:12px; color:var(--text-faint); }

@media(max-width:560px){
  .features{ grid-template-columns:1fr; }
  .feature{ border-left:none; border-top:1px solid var(--border); }
  .feature:first-child{ border-top:none; }
  .stats{ grid-template-columns:repeat(2,1fr); }
  .stat:nth-child(3){ border-left:none; border-top:1px solid var(--border); }
  .stat:nth-child(2n+1){ border-left:none; }
  .how-steps{ grid-template-columns:1fr; }
  .compare-table{ font-size:12px; }
  .compare-table th, .compare-table td{ padding:10px; }
}

:focus-visible{ outline:2px solid var(--teal); outline-offset:2px; }