/* ============================================================
   Seta Labs AI — landing page
   Single stylesheet, no dependencies, no build step.
   ============================================================ */

:root{
  --bg:        #07090d;
  --bg-band:   #0a0d13;
  --surface:   #0f141c;
  --surface-2: #141a24;
  --line:      #1e2733;
  --line-soft: #171f2a;

  --text:      #e8edf5;
  --text-mid:  #a8b5c6;
  --muted:     #7d8b9e;

  --teal:      #3ee0c5;
  --violet:    #7c6cf5;
  --grad: linear-gradient(105deg, var(--teal), var(--violet));

  --r-sm: 10px;
  --r:    16px;
  --r-lg: 22px;

  --wrap: 1140px;
  --shadow: 0 24px 60px -20px rgba(0,0,0,.7);

  --ease: cubic-bezier(.22,.61,.36,1);

  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI",
          Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html{ scroll-behavior:smooth; scroll-padding-top:88px; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

h1,h2,h3{ line-height:1.12; letter-spacing:-.025em; margin:0; font-weight:640; }
h1{ font-size:clamp(2.4rem, 5.6vw, 4.1rem); }
h2{ font-size:clamp(1.9rem, 3.8vw, 2.9rem); }
h3{ font-size:1.16rem; letter-spacing:-.015em; }
p{ margin:0; }
a{ color:inherit; text-decoration:none; }
img,svg{ max-width:100%; }

.wrap{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:24px; }
.wrap--narrow{ max-width:760px; }

.skip{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--teal); color:#04120f; padding:12px 18px;
  border-radius:0 0 var(--r-sm) 0; font-weight:600;
}
.skip:focus{ left:0; }

:focus-visible{ outline:2px solid var(--teal); outline-offset:3px; border-radius:4px; }

.grad{
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text;
  color:transparent;
}

/* ─────────────── nav ─────────────── */

.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  background:rgba(7,9,13,.6);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease), border-color .3s var(--ease);
}
.nav.is-stuck{ background:rgba(7,9,13,.88); border-bottom-color:var(--line-soft); }

.nav__inner{ display:flex; align-items:center; justify-content:space-between; height:72px; gap:24px; }

.brand{ display:inline-flex; align-items:center; gap:11px; flex-shrink:0; }
.brand__mark{ width:32px; height:32px; }
.brand__text{ font-weight:680; font-size:1.06rem; letter-spacing:-.02em; }
.brand__ai{
  margin-left:5px; font-size:.66em; font-weight:700; letter-spacing:.09em;
  padding:2px 6px; border-radius:5px; vertical-align:2px;
  background:var(--grad); color:#05100e;
}

.nav__links{ display:flex; align-items:center; gap:30px; }
.nav__links a{ font-size:.94rem; color:var(--text-mid); transition:color .2s var(--ease); }
.nav__links a:hover{ color:var(--text); }
.nav__links .btn{ color:#04120f; }

.nav__toggle{
  display:none; width:42px; height:42px; padding:11px 9px;
  background:none; border:1px solid var(--line); border-radius:var(--r-sm); cursor:pointer;
  flex-direction:column; justify-content:space-between;
}
.nav__toggle span{ display:block; height:2px; background:var(--text); border-radius:2px; transition:.25s var(--ease); }
.nav__toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(9px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-9px) rotate(-45deg); }

@media (max-width:860px){
  .nav__toggle{ display:flex; }
  .nav__links{
    position:absolute; top:72px; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:rgba(9,12,17,.97);
    backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line-soft);
    padding:8px 24px 22px;
    clip-path:inset(0 0 100% 0); opacity:0; pointer-events:none;
    transition:clip-path .32s var(--ease), opacity .25s var(--ease);
  }
  .nav__links.is-open{ clip-path:inset(0 0 0 0); opacity:1; pointer-events:auto; }
  .nav__links a{ padding:14px 0; border-bottom:1px solid var(--line-soft); font-size:1rem; }
  .nav__links .btn{ margin-top:16px; border-bottom:0; text-align:center; }
}

/* ─────────────── buttons ─────────────── */

.btn{
  --btn-py:13px; --btn-px:22px;
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:var(--btn-py) var(--btn-px);
  border:1px solid transparent; border-radius:100px;
  font-size:.95rem; font-weight:600; letter-spacing:-.008em;
  cursor:pointer; white-space:nowrap;
  transition:transform .18s var(--ease), box-shadow .25s var(--ease),
             background .25s var(--ease), border-color .25s var(--ease);
}
.btn--sm{ --btn-py:9px; --btn-px:17px; font-size:.88rem; }
.btn--lg{ --btn-py:16px; --btn-px:30px; font-size:1rem; }
.btn--full{ width:100%; }

.btn--primary{
  background:var(--grad); color:#04120f;
  box-shadow:0 8px 26px -8px rgba(62,224,197,.45);
}
.btn--primary:hover{ transform:translateY(-2px); box-shadow:0 14px 34px -10px rgba(62,224,197,.6); }

.btn--ghost{ background:transparent; border-color:var(--line); color:var(--text); }
.btn--ghost:hover{ border-color:#31404f; background:rgba(255,255,255,.035); transform:translateY(-2px); }

.btn:active{ transform:translateY(0); }

/* ─────────────── hero ─────────────── */

.hero{ position:relative; padding:172px 0 96px; overflow:hidden; }

.hero__grid{
  position:absolute; inset:-40% 0 auto 0; height:170%;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 78% 52% at 50% 26%, #000 5%, transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 78% 52% at 50% 26%, #000 5%, transparent 72%);
  pointer-events:none;
}
.hero__glow{
  position:absolute; top:-260px; left:50%; transform:translateX(-50%);
  width:min(1100px, 130vw); height:640px; pointer-events:none;
  background:
    radial-gradient(closest-side, rgba(62,224,197,.20), transparent 70%),
    radial-gradient(closest-side, rgba(124,108,245,.22), transparent 72%);
  background-position:22% 42%, 74% 30%;
  background-size:66% 82%, 70% 86%;
  background-repeat:no-repeat;
  filter:blur(28px);
}

.hero__inner{ position:relative; text-align:center; }

.eyebrow{
  display:inline-block;
  font-size:.79rem; font-weight:600; letter-spacing:.15em; text-transform:uppercase;
  color:var(--teal);
  padding:7px 15px; margin-bottom:26px;
  border:1px solid rgba(62,224,197,.26); border-radius:100px;
  background:rgba(62,224,197,.06);
}

.hero__title em{ font-style:italic; font-weight:500; }
.hero__sub{
  max-width:680px; margin:26px auto 0;
  font-size:clamp(1.03rem, 1.55vw, 1.17rem); color:var(--text-mid);
}
.hero__cta{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-top:38px; }
.hero__note{ margin-top:18px; font-size:.88rem; color:var(--muted); }
.hero__note em{ color:var(--text-mid); font-style:italic; }

.stats{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  max-width:900px; margin:76px auto 0;
  background:var(--line-soft);
  border:1px solid var(--line-soft); border-radius:var(--r);
  overflow:hidden;
}
.stat{ background:var(--bg-band); padding:26px 22px; text-align:center; }
.stat b{ display:block; font-size:1.6rem; font-weight:660; letter-spacing:-.03em; margin-bottom:5px; }
.stat span{ font-size:.86rem; color:var(--muted); line-height:1.5; display:block; }

@media (max-width:720px){
  .hero{ padding:132px 0 68px; }
  .stats{ grid-template-columns:1fr; margin-top:52px; }
  .hero__cta .btn{ width:100%; }
}

/* ─────────────── sections ─────────────── */

.section{ padding:104px 0; position:relative; }
.band{ background:var(--bg-band); border-block:1px solid var(--line-soft); }

.sec-head{ max-width:780px; margin:0 auto 58px; text-align:center; }
.sec-head .lede{ max-width:620px; margin-inline:auto; }
.sec-head .eyebrow{ margin-bottom:20px; }
.lede{ margin-top:20px; color:var(--text-mid); font-size:1.04rem; }

@media (max-width:720px){ .section{ padding:76px 0; } }

/* ─────────────── cards ─────────────── */

.cards{ display:grid; gap:22px; }
.cards--3{ grid-template-columns:repeat(3,1fr); }
.cards--2{ grid-template-columns:repeat(2,1fr); }

.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line-soft);
  border-radius:var(--r-lg);
  padding:30px;
  transition:transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}
.card:hover{ transform:translateY(-4px); border-color:var(--line); background:var(--surface-2); }
.card h3{ margin-bottom:10px; }
.card p{ color:var(--text-mid); font-size:.97rem; }

.card__icon{
  width:46px; height:46px; margin-bottom:20px;
  display:grid; place-items:center; font-size:1.25rem;
  border:1px solid var(--line); border-radius:13px;
  background:linear-gradient(160deg, rgba(62,224,197,.10), rgba(124,108,245,.10));
}
.card--lg{ padding:36px; }
.card__num{
  display:block; margin-bottom:16px;
  font-size:.82rem; font-weight:700; letter-spacing:.12em;
  background:var(--grad); -webkit-background-clip:text; background-clip:text; color:transparent;
}

.ticks{ list-style:none; margin:22px 0 0; padding:0; display:grid; gap:11px; }
.ticks li{
  position:relative; padding-left:27px;
  font-size:.92rem; color:var(--text-mid);
}
.ticks li::before{
  content:""; position:absolute; left:0; top:.52em;
  width:15px; height:8px;
  border-left:2px solid var(--teal); border-bottom:2px solid var(--teal);
  transform:rotate(-45deg) translateY(-1px);
  border-radius:1px;
}

@media (max-width:900px){ .cards--3,.cards--2{ grid-template-columns:1fr; } }

/* ─────────────── steps ─────────────── */

.steps{
  list-style:none; margin:0; padding:0;
  max-width:790px; margin-inline:auto;
  display:grid; gap:0;
}
.step{ display:flex; gap:26px; position:relative; padding-bottom:34px; }
.step:last-child{ padding-bottom:0; }
.step::before{
  content:""; position:absolute; left:23px; top:52px; bottom:-4px; width:1px;
  background:linear-gradient(to bottom, var(--line), transparent);
}
.step:last-child::before{ display:none; }

.step__n{
  flex-shrink:0; width:47px; height:47px;
  display:grid; place-items:center;
  font-weight:660; font-size:1.02rem;
  border-radius:50%;
  background:var(--surface); border:1px solid var(--line);
  position:relative; z-index:1;
}
.step:hover .step__n{ border-color:var(--teal); color:var(--teal); }
.step__n{ transition:border-color .25s var(--ease), color .25s var(--ease); }

.step__body h3{ display:flex; align-items:center; gap:12px; flex-wrap:wrap; margin-bottom:9px; padding-top:11px; }
.step__wk{
  font-size:.71rem; font-weight:600; letter-spacing:.09em; text-transform:uppercase;
  color:var(--teal); padding:4px 10px; border-radius:100px;
  background:rgba(62,224,197,.08); border:1px solid rgba(62,224,197,.2);
}
.step__body p{ color:var(--text-mid); font-size:.97rem; }

@media (max-width:600px){
  .step{ gap:18px; }
  .step::before{ left:19px; }
  .step__n{ width:39px; height:39px; font-size:.92rem; }
}

/* ─────────────── pills + quote ─────────────── */

.pills{ display:flex; flex-wrap:wrap; gap:11px; justify-content:center; margin-bottom:60px; }
.pills span{
  padding:9px 18px; border-radius:100px;
  border:1px solid var(--line-soft); background:var(--surface);
  font-size:.9rem; color:var(--text-mid);
  transition:border-color .25s var(--ease), color .25s var(--ease);
}
.pills span:hover{ border-color:var(--line); color:var(--text); }

.quote{
  position:relative; overflow:hidden;
  max-width:740px; margin:0 auto; padding:40px 42px;
  background:var(--surface); border:1px solid var(--line-soft);
  border-radius:var(--r);
  text-align:center;
}
/* gradient accent on the left edge, drawn inside so the radius survives */
.quote::before{
  content:""; position:absolute; left:0; top:0; bottom:0; width:3px;
  background:var(--grad);
}
.quote p{ font-size:clamp(1.08rem, 2vw, 1.3rem); line-height:1.55; letter-spacing:-.015em; }
.quote footer{ margin-top:20px; font-size:.83rem; color:var(--muted); font-style:italic; }

@media (max-width:600px){ .quote{ padding:30px 24px; } }

/* ─────────────── pricing ─────────────── */

.tiers{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; align-items:start; }

.tier{
  position:relative;
  background:var(--surface); border:1px solid var(--line-soft);
  border-radius:var(--r-lg); padding:34px 30px;
  display:flex; flex-direction:column;
  transition:transform .3s var(--ease), border-color .3s var(--ease);
}
.tier:hover{ transform:translateY(-4px); border-color:var(--line); }

.tier--feature{
  border-color:rgba(62,224,197,.32);
  background:linear-gradient(175deg, rgba(62,224,197,.055), rgba(124,108,245,.045)), var(--surface);
  box-shadow:var(--shadow);
}
.tier__tag{
  position:absolute; top:-12px; left:50%; transform:translateX(-50%);
  font-size:.72rem; font-weight:700; letter-spacing:.09em; text-transform:uppercase;
  padding:5px 14px; border-radius:100px;
  background:var(--grad); color:#04120f; white-space:nowrap;
}

.tier__price{ margin:16px 0 14px; display:flex; align-items:baseline; gap:8px; flex-wrap:wrap; }
.tier__price b{ font-size:2.4rem; font-weight:650; letter-spacing:-.035em; }
.tier__price span{ font-size:.86rem; color:var(--muted); }
.tier__blurb{ color:var(--text-mid); font-size:.94rem; }
.tier .ticks{ margin-bottom:30px; flex-grow:1; }
.tier .btn{ margin-top:auto; }

@media (max-width:900px){ .tiers{ grid-template-columns:1fr; max-width:440px; margin-inline:auto; } }

/* ─────────────── faq ─────────────── */

.faq{ display:grid; gap:12px; }

.faq details{
  background:var(--surface); border:1px solid var(--line-soft);
  border-radius:var(--r); overflow:hidden;
  transition:border-color .25s var(--ease);
}
.faq details[open]{ border-color:var(--line); }
.faq summary{
  list-style:none; cursor:pointer;
  padding:21px 56px 21px 26px; position:relative;
  font-weight:560; font-size:1.01rem; letter-spacing:-.012em;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
  content:""; position:absolute; right:26px; top:50%;
  width:9px; height:9px; margin-top:-6px;
  border-right:2px solid var(--muted); border-bottom:2px solid var(--muted);
  transform:rotate(45deg); transition:transform .25s var(--ease), border-color .25s var(--ease);
}
.faq details[open] summary::after{ transform:rotate(-135deg) translate(-3px,-3px); border-color:var(--teal); }
.faq summary:hover{ color:#fff; }
.faq details p{ padding:0 26px 24px; color:var(--text-mid); font-size:.96rem; max-width:64ch; }

/* ─────────────── cta ─────────────── */

.cta{
  position:relative; overflow:hidden;
  padding:110px 0 120px;
  background:var(--bg-band); border-top:1px solid var(--line-soft);
}
.cta__glow{
  position:absolute; bottom:-320px; left:50%; transform:translateX(-50%);
  width:min(900px,120vw); height:560px; pointer-events:none;
  background:radial-gradient(closest-side, rgba(124,108,245,.28), transparent 70%);
  filter:blur(20px);
}
.cta__inner{ position:relative; text-align:center; }
.cta__inner > p{ margin:20px auto 0; max-width:520px; color:var(--text-mid); }

.form{ margin-top:44px; text-align:left; }
.form__row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }

.field{ display:block; margin-bottom:16px; }
.field > span{
  display:block; margin-bottom:8px;
  font-size:.83rem; font-weight:560; color:var(--text-mid);
}
.field input, .field textarea{
  width:100%; padding:14px 16px;
  background:var(--surface); color:var(--text);
  border:1px solid var(--line); border-radius:var(--r-sm);
  font:inherit; font-size:.96rem;
  transition:border-color .2s var(--ease), background .2s var(--ease);
  resize:vertical;
}
.field input::placeholder, .field textarea::placeholder{ color:#5c6878; }
.field input:focus, .field textarea:focus{
  outline:none; border-color:var(--teal); background:var(--surface-2);
}
.field.is-bad input, .field.is-bad textarea{ border-color:#e4666f; }

.form .btn{ margin-top:10px; }
.form__status{ margin-top:14px; font-size:.9rem; min-height:1.3em; text-align:center; }
.form__status.is-ok{ color:var(--teal); }
.form__status.is-bad{ color:#e4666f; }
.form__fine{ margin-top:14px; font-size:.79rem; color:var(--muted); text-align:center; }
.form__fine code{
  background:var(--surface-2); border:1px solid var(--line-soft);
  padding:2px 6px; border-radius:5px; font-size:.94em;
}

@media (max-width:600px){ .form__row{ grid-template-columns:1fr; gap:0; } }

/* ─────────────── footer ─────────────── */

.foot{ padding:64px 0 30px; border-top:1px solid var(--line-soft); }
.foot__inner{
  display:flex; justify-content:space-between; align-items:flex-start;
  gap:40px; flex-wrap:wrap; padding-bottom:36px;
}
.foot__brand{ max-width:320px; }
.foot__brand p{ margin-top:12px; font-size:.9rem; color:var(--muted); }
.foot__links{ display:flex; gap:26px; flex-wrap:wrap; }
.foot__links a{ font-size:.91rem; color:var(--text-mid); transition:color .2s var(--ease); }
.foot__links a:hover{ color:var(--text); }

.foot__base{
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  padding-top:26px; border-top:1px solid var(--line-soft);
  font-size:.84rem; color:var(--muted);
}

/* ─────────────── reveal on scroll ─────────────── */

/* Gated on .js (set by an inline script in <head>) so that if JavaScript
   never runs, the content is simply visible rather than stuck at opacity:0. */
.js .reveal{ opacity:0; transform:translateY(18px); }
.js .reveal.is-in{
  opacity:1; transform:none;
  transition:opacity .65s var(--ease), transform .65s var(--ease);
}
@media (prefers-reduced-motion:reduce){
  .js .reveal{ opacity:1; transform:none; }
  .js .reveal.is-in{ transition:none; }
  .card:hover,.tier:hover,.btn:hover{ transform:none; }
}