/* Lithoric — landing + survey styles
   Minimal, type-led, single-column. Dark hero/footer, light content.
   Palette pulled from the Lithoric brand system. */

:root{
  --dark:#080d13;        /* showcase dark (hero / footer) */
  --dark-2:#0f1923;      /* raised dark surface */
  --ink:#10161c;         /* near-black text on light */
  --body:#39434c;        /* body text on light */
  --muted:#6b7680;       /* secondary text */
  --paper:#ffffff;
  --paper-soft:#f4f6f4;  /* light content background */
  --line:#e4e7e6;        /* hairlines on light */
  --line-dark:#26323d;   /* hairlines on dark */
  --signal:#2bb8f7;      /* brand cyan accent */
  --signal-600:#0e7fb8;
  --urgent:#ff5a47;      /* urgency accent */
  --on-dark:#eef3f6;
  --on-dark-muted:#9fb0bd;
  --maxw:760px;
}

*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  font-size:18px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{ color:inherit; }
img,svg{ max-width:100%; }

.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }

/* ---- kicker / eyebrow ---- */
.kicker{
  font-size:12.5px; font-weight:600; letter-spacing:.18em; text-transform:uppercase;
  color:var(--signal-600); margin:0 0 18px;
}
.kicker.on-dark{ color:var(--signal); }

/* ---- display type ---- */
.display{
  font-family:"Space Grotesk","Inter",sans-serif;
  font-weight:600; letter-spacing:-.02em; line-height:1.04; margin:0;
}

/* =========================================================
   HERO
   ========================================================= */
.hero{
  background:
    radial-gradient(115% 80% at 82% -8%, rgba(43,184,247,.10), transparent 58%),
    linear-gradient(168deg, #0d1620 0%, #0a121b 42%, #05080c 100%);
  color:var(--on-dark);
  padding:34px 0 96px;
  position:relative;
  overflow:hidden;
}
.hero::before{ /* faint top-left light pool */
  content:""; position:absolute; inset:-25% auto auto -18%; width:55%; height:75%;
  background:radial-gradient(closest-side, rgba(43,184,247,.07), transparent 70%);
  pointer-events:none;
}
.hero::after{ /* photonic glow, lower-right */
  content:""; position:absolute; inset:auto -10% -45% auto; width:68%; height:80%;
  background:radial-gradient(closest-side, rgba(43,184,247,.13), transparent 70%);
  pointer-events:none;
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  margin-bottom:84px;
}
.nav .mark{ height:58px; width:auto; display:block; }
.nav .nav-contact{
  display:inline-flex; align-items:center; justify-content:center;
  width:42px; height:42px; border-radius:999px;
  color:var(--on-dark-muted); text-decoration:none;
  border:1px solid var(--line-dark);
  transition:color .2s ease, border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.nav .nav-contact svg{ display:block; }
.nav .nav-contact:hover,
.nav .nav-contact:focus-visible{
  color:#fff; border-color:var(--signal);
  background:linear-gradient(180deg, rgba(43,184,247,.16), rgba(43,184,247,.05));
  box-shadow:0 0 0 1px rgba(43,184,247,.4), 0 8px 22px -10px rgba(43,184,247,.7);
  outline:none;
}
.hero h1{
  font-size:clamp(2.3rem, 6.2vw, 4.3rem);
  max-width:14ch;
}
.hero .sub{
  margin:26px 0 0; max-width:46ch;
  font-size:clamp(1.05rem,2.4vw,1.3rem); line-height:1.5; color:var(--on-dark-muted);
}
.hero .hero-cta{ margin-top:40px; display:flex; gap:14px; flex-wrap:wrap; }

/* ---- pill buttons ---- */
.btn{
  display:inline-flex; align-items:center; gap:.55em;
  font-weight:600; font-size:15.5px; line-height:1;
  padding:15px 26px; border-radius:999px; text-decoration:none;
  border:1px solid transparent; cursor:pointer; transition:.18s ease;
}
.btn .arrow{ transition:transform .18s ease; }
.btn:hover .arrow{ transform:translateX(3px); }
.btn-ghost{ border-color:var(--line-dark); color:var(--on-dark); background:transparent; }
.btn-ghost:hover{ border-color:var(--signal); color:#fff; }
.btn-primary{ background:var(--ink); color:#fff; }
.btn-primary:hover{ background:#000; }
.btn-signal{ background:var(--signal); color:#03222f; }
.btn-signal:hover{ background:#46c4fb; }
.btn-lg{ padding:18px 32px; font-size:16.5px; }

/* =========================================================
   CONTENT
   ========================================================= */
.content{ background:var(--paper-soft); padding:84px 0 28px; }
.content h2.display{ font-size:clamp(1.7rem,4.2vw,2.7rem); max-width:18ch; }
.content .lead{
  font-size:clamp(1.15rem,2.6vw,1.4rem); line-height:1.5; color:var(--ink);
  margin:22px 0 0; max-width:38ch; font-weight:500;
}
.block{ margin-top:40px; }
.block h3{
  font-size:13px; font-weight:700; letter-spacing:.12em; text-transform:uppercase;
  color:var(--signal-600); margin:0 0 8px;
}
.block p{ margin:0; color:var(--body); }
.block p + p{ margin-top:14px; }
.block.urgent h3{ color:var(--urgent); }
.pull{ color:var(--ink); font-weight:600; }

/* ---- bulleted lists (technology section) ---- */
.block ul{ list-style:none; margin:14px 0 0; padding:0; display:grid; gap:11px; }
.block ul li{ position:relative; padding-left:20px; color:var(--body); font-size:16.5px; line-height:1.5; }
.block ul li::before{
  content:""; position:absolute; left:0; top:.62em;
  width:7px; height:7px; border-radius:50%; background:var(--signal);
}
.block ul li strong{ color:var(--ink); font-weight:600; }

/* ---- technology section divider ---- */
.content.tech{ padding-top:64px; border-top:1px solid var(--line); }

/* ---- closing + survey CTA ---- */
.close{ background:var(--paper-soft); padding:8px 0 92px; }
.cta-card{
  margin-top:24px; background:var(--dark); color:var(--on-dark);
  border-radius:18px; padding:44px 38px; text-align:center;
}
.cta-card p{ margin:0 auto; max-width:34ch; font-size:clamp(1.15rem,2.6vw,1.45rem);
  line-height:1.45; color:#fff; font-weight:500; font-family:"Space Grotesk",sans-serif; }
.cta-card .note{ margin-top:14px; font-size:13.5px; color:var(--on-dark-muted); font-family:"Inter",sans-serif; font-weight:400; }
.cta-card .btn{ margin-top:26px; }

/* =========================================================
   FOOTER
   ========================================================= */
.footer{ background:var(--dark); color:var(--on-dark-muted); padding:56px 0 64px;
  border-top:1px solid var(--line-dark); }
.footer .logo{ height:80px; width:auto; display:block; margin-bottom:22px; }
.footer .addr{ font-size:14.5px; line-height:1.7; }
.footer .addr a{ color:var(--on-dark); text-decoration:none; }
.footer .addr a:hover{ color:var(--signal); }
.footer .tagline{ color:var(--on-dark); font-weight:500; margin:0 0 18px; }
.footer .about{ max-width:52ch; font-size:14.5px; line-height:1.6; color:var(--on-dark-muted); margin:0 0 22px; }
.footer .fine{ margin-top:26px; font-size:12.5px; color:#5d6b76; }

/* =========================================================
   SURVEY PAGE
   ========================================================= */
.survey-head{ background:var(--dark); color:var(--on-dark); padding:30px 0 46px; }
.survey-head .mark{ height:30px; margin-bottom:40px; }
.survey-head h1{ font-size:clamp(1.7rem,4.5vw,2.5rem); max-width:20ch; }
.survey-head .sub{ color:var(--on-dark-muted); margin-top:14px; max-width:54ch; font-size:1.05rem; }
.anon{ display:inline-flex; align-items:center; gap:8px; margin-top:20px;
  font-size:13px; color:var(--on-dark); background:var(--dark-2);
  border:1px solid var(--line-dark); border-radius:999px; padding:7px 14px; }
.anon .dot{ width:7px; height:7px; border-radius:50%; background:var(--signal); }

.form{ background:var(--paper); padding:46px 0 90px; }
.q{ padding:22px 0; border-bottom:1px solid var(--line); }
.q:last-of-type{ border-bottom:0; }
.q .stmt{ font-weight:600; color:var(--ink); font-size:1.05rem; margin:0 0 14px; display:block; }
.q .stmt .n{ color:var(--signal-600); margin-right:8px; }
.opts{ display:flex; flex-wrap:wrap; gap:10px; }
.opt{ position:relative; }
.opt input{ position:absolute; opacity:0; inset:0; cursor:pointer; }
.opt span{ display:inline-block; padding:9px 16px; border:1px solid var(--line);
  border-radius:999px; font-size:14.5px; color:var(--body); transition:.15s; cursor:pointer; }
.opt input:checked + span{ border-color:var(--signal); background:#eaf7fe; color:var(--ink); font-weight:600; }
.opt input:focus-visible + span{ outline:2px solid var(--signal); outline-offset:2px; }
.scale{ display:flex; gap:8px; }
.scale .opt{ flex:1; text-align:center; }
.scale .opt span{ width:100%; padding:12px 4px; font-size:13px; }
.ends{ display:flex; justify-content:space-between; font-size:12px; color:var(--muted); margin-top:8px; }
textarea, input[type=text], input[type=email]{
  width:100%; font-family:inherit; font-size:15.5px; line-height:1.4; color:var(--ink);
  border:1px solid var(--line); border-radius:10px; padding:12px 14px; resize:vertical; background:#fff;
  -webkit-appearance:none; appearance:none;
}
textarea:focus, input[type=text]:focus, input[type=email]:focus{ outline:none; border-color:var(--signal); }
input.invalid{ border-color:var(--urgent); }
.field-error{ color:var(--urgent); font-size:13px; margin:8px 0 0; }
.field-ok{ color:var(--signal-600); font-size:13px; margin:8px 0 0; }
.email-row{ display:flex; gap:12px; align-items:center; }
.email-row > input{ flex:1 1 0; min-width:0; font-size:15.5px; }
.range-wrap{ display:flex; align-items:center; gap:16px; }
.range-wrap input[type=range]{ flex:1; accent-color:var(--signal); }
.range-val{ font-family:"Space Grotesk",sans-serif; font-weight:600; min-width:54px; font-size:1.1rem; }
.submit-row{ margin-top:34px; display:flex; align-items:center; gap:18px; flex-wrap:wrap; }
.submit-row .privacy{ font-size:12.5px; color:var(--muted); max-width:40ch; }
.thanks{ display:none; text-align:center; padding:60px 0; }
.thanks.show{ display:block; }
.thanks h2{ font-family:"Space Grotesk",sans-serif; font-size:1.8rem; margin:0 0 10px; }
.thanks p{ color:var(--body); }
.back-link{ display:inline-block; margin-top:30px; font-size:14.5px; color:var(--signal-600);
  text-decoration:none; font-weight:600; }

@media (max-width:720px){
  .nav .mark{ height:46px; }
}

@media (max-width:600px){
  body{ font-size:17px; }
  .nav{ margin-bottom:56px; }
  .hero{ padding:26px 0 72px; }
  .cta-card{ padding:34px 22px; }
  .scale{ flex-wrap:wrap; }
  .scale .opt{ flex:0 0 calc(20% - 7px); }
}