/* vapor.estate — landing styles
   Single stylesheet, no external dependencies.
   Theme: thermal / vapor instrumentation (deep slate + cyan/steam accents). */

:root {
  --bg: #0a0f14;
  --bg-soft: #0f1620;
  --panel: #121b26;
  --panel-2: #16212f;
  --border: #1f2d3d;
  --text: #e7eef5;
  --text-dim: #9fb0c0;
  --text-faint: #6c7f90;
  --accent: #36d6c3;       /* steam cyan */
  --accent-2: #5aa9ff;     /* gauge blue */
  --accent-warm: #ff8a5b;  /* heat orange */
  --radius: 14px;
  --maxw: 1080px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: radial-gradient(1200px 600px at 70% -10%, rgba(54,214,195,0.10), transparent 60%),
              radial-gradient(900px 500px at 10% 0%, rgba(90,169,255,0.08), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: rgba(10,15,20,0.72);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand {
  display: inline-block; font-weight: 800; font-size: 1.34rem;
  letter-spacing: -0.035em; color: var(--text); line-height: 1;
}
.brand:hover { text-decoration: none; }
.brand .dot {
  font-weight: 700;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--text-dim); font-size: 0.92rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.lang { font-family: var(--mono); font-size: 0.8rem; color: var(--text-faint); border: 1px solid var(--border); padding: 4px 9px; border-radius: 8px; }
.lang a { color: var(--text-dim); }
.lang .active { color: var(--accent); }
@media (max-width: 720px){ .nav-links a:not(.btn):not(.lang){ display:none; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; font-weight: 600; font-size: 0.95rem;
  padding: 12px 22px; border-radius: 10px; cursor: pointer; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04201c; box-shadow: 0 8px 28px rgba(54,214,195,0.28);
}
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
/* Keep button text colors inside the nav (otherwise `.nav-links a` dims them). */
.nav-links a.btn-primary { color: #04201c; }
.nav-links a.btn-ghost { color: var(--text); }

/* ---------- Hero ---------- */
.hero { padding: 92px 0 64px; text-align: center; }
.eyebrow {
  display: inline-block; font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent); border: 1px solid rgba(54,214,195,0.3);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 26px; background: rgba(54,214,195,0.06);
}
.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.7rem); line-height: 1.08; letter-spacing: -0.025em;
  font-weight: 800; margin-bottom: 22px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2) 60%, var(--accent-warm));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p.lede { font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--text-dim); max-width: 680px; margin: 0 auto 34px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 0.85rem; color: var(--text-faint); }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); letter-spacing: -0.02em; margin-bottom: 14px; }
.section-head p { color: var(--text-dim); font-size: 1.05rem; }
.kicker { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 12px; }

/* Entity definition block */
.define {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 38px 40px; max-width: 860px; margin: 0 auto;
}
.define p { font-size: 1.12rem; color: var(--text); }
.define p strong { color: var(--accent); }
.define .tags { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; }
.tag { font-family: var(--mono); font-size: 0.8rem; color: var(--text-dim); background: var(--panel-2); border: 1px solid var(--border); padding: 6px 12px; border-radius: 8px; }

/* Feature grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 880px){ .grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px){ .grid { grid-template-columns: 1fr; } }
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: rgba(54,214,195,0.45); transform: translateY(-3px); }
.card .ico {
  width: 44px; height: 44px; border-radius: 11px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(54,214,195,0.10); border: 1px solid rgba(54,214,195,0.25);
}
.card .ico svg { width: 22px; height: 22px; stroke: var(--accent); fill: none; stroke-width: 1.8; }
.card h3 { font-size: 1.12rem; margin-bottom: 8px; letter-spacing: -0.01em; }
.card p { color: var(--text-dim); font-size: 0.96rem; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: 26px; }
@media (max-width: 760px){ .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding-left: 56px; }
.step .num {
  position: absolute; left: 0; top: 0; width: 40px; height: 40px; border-radius: 10px;
  font-family: var(--mono); font-weight: 700; display: flex; align-items: center; justify-content: center;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--accent);
}
.step h3 { font-size: 1.08rem; margin-bottom: 6px; }
.step p { color: var(--text-dim); font-size: 0.96rem; }

/* Audience */
.audience { display:flex; flex-wrap:wrap; gap:12px; justify-content:center; max-width:760px; margin:0 auto; }
.audience span { background: var(--panel); border:1px solid var(--border); border-radius:999px; padding:10px 18px; color:var(--text-dim); font-size:0.95rem; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
details {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 0 22px; margin-bottom: 14px; overflow: hidden;
}
details[open] { border-color: rgba(54,214,195,0.4); }
summary { cursor: pointer; list-style: none; padding: 20px 0; font-weight: 600; font-size: 1.04rem; display: flex; justify-content: space-between; align-items: center; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 1.4rem; font-weight: 400; }
details[open] summary::after { content: "\2212"; }
details p { color: var(--text-dim); padding: 0 0 22px; font-size: 0.98rem; }

/* CTA / waitlist */
.cta {
  background: linear-gradient(135deg, rgba(54,214,195,0.10), rgba(90,169,255,0.08));
  border: 1px solid rgba(54,214,195,0.3); border-radius: 20px; padding: 56px 32px; text-align: center;
}
.cta h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); margin-bottom: 14px; letter-spacing: -0.02em; }
.cta p { color: var(--text-dim); max-width: 540px; margin: 0 auto 28px; }
.waitlist { display: flex; gap: 10px; max-width: 460px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.waitlist input {
  flex: 1; min-width: 220px; padding: 13px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--text); font-size: 0.98rem; font-family: var(--font);
}
.waitlist input:focus { outline: none; border-color: var(--accent); }

/* Footer */
footer { border-top: 1px solid var(--border); padding: 40px 0; color: var(--text-faint); font-size: 0.9rem; }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; align-items: center; }
.foot a { color: var(--text-dim); }
.foot .links { display: flex; gap: 20px; flex-wrap: wrap; }

.sr-only { position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); border:0; }