/* Instant.Talk — design system
   Liquid glass over one continuous ambient backdrop.
   Porcelain neutrals, graphite ink, ONE deep-sapphire jewel accent,
   apricot used only as warm ambient light, coral only for alerts.
   Serif = authority, mono = the data voice. System fonts only. */

:root{
  /* neutrals */
  --porc:#E7E8EB; --porc-hi:#F1F2F4; --porc-lo:#D7D9DE;
  /* text */
  --ink:#23262E; --ink2:#545965; --muted:#888D9A;
  /* accent: deep sapphire jewel */
  --sap:#1C4E82; --sap-hi:#2565A6; --sap-lo:#153A62;
  /* warm hairline */
  --warm:#A6764E; --warmln:rgba(166,118,78,.34);
  /* alerts only */
  --coral:#C25A38;
  /* geometry + type */
  --r:22px; --rs:14px; --rp:999px; --maxw:1160px;
  --serif:"Iowan Old Style",Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  --mono:"SF Mono",ui-monospace,"Cascadia Mono",Menlo,monospace;
  --spring:cubic-bezier(.34,1.25,.4,1);
}
::selection{background:rgba(28,78,130,.16)}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:#E5E7EC;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}

/* ---------- ambient backdrop (one continuous layer; sections never paint bg) ---------- */
.amb{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.amb::before{content:"";position:absolute;inset:0;background:
  radial-gradient(52% 42% at 8% 0%, #FFFFFF 0%, transparent 56%),
  radial-gradient(48% 44% at 96% 3%, rgba(233,150,90,.20) 0%, transparent 56%),
  radial-gradient(52% 46% at 90% 58%, rgba(28,78,130,.26) 0%, transparent 60%),
  radial-gradient(56% 48% at 6% 94%, rgba(233,150,90,.16) 0%, transparent 60%),
  linear-gradient(165deg,#EEF0F4 0%,#E3E6EC 55%,#DBDEE5 100%)}
.blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.55;
  animation:drift 24s ease-in-out infinite}
.blob.b1{width:520px;height:520px;left:-140px;top:-120px;background:rgba(28,78,130,.30)}
.blob.b2{width:460px;height:460px;right:-120px;top:22%;background:rgba(233,150,90,.26);animation-delay:-8s}
.blob.b3{width:540px;height:540px;left:8%;bottom:-180px;background:rgba(37,101,166,.22);animation-delay:-15s}
@keyframes drift{0%,100%{transform:translate(0,0)}50%{transform:translate(38px,-30px)}}
@media (prefers-reduced-motion:reduce){.blob{animation:none}}
.stage{position:relative;z-index:1}

/* ---------- liquid-glass primitives ---------- */
.soft{background:linear-gradient(150deg,rgba(255,255,255,.44),rgba(255,255,255,.22));
  -webkit-backdrop-filter:blur(30px) saturate(175%);backdrop-filter:blur(30px) saturate(175%);
  border:1px solid rgba(255,255,255,.6);border-top-color:rgba(255,255,255,.98);
  border-radius:var(--r);
  box-shadow:0 20px 50px rgba(96,106,132,.22),inset 0 1px 0 rgba(255,255,255,.85),
    inset 0 -1px 0 rgba(255,255,255,.22)}
.soft-sm{background:linear-gradient(150deg,rgba(255,255,255,.46),rgba(255,255,255,.24));
  -webkit-backdrop-filter:blur(22px) saturate(170%);backdrop-filter:blur(22px) saturate(170%);
  border:1px solid rgba(255,255,255,.58);border-top-color:rgba(255,255,255,.95);
  border-radius:var(--rs);
  box-shadow:0 12px 30px rgba(96,106,132,.18),inset 0 1px 0 rgba(255,255,255,.8)}
.inset{background:rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(9px);backdrop-filter:blur(9px);
  border:1px solid rgba(255,255,255,.28);border-radius:var(--rs);
  box-shadow:inset 2px 3px 9px rgba(96,106,132,.24),inset -1px -1px 2px rgba(255,255,255,.5)}
.pressable{transition:transform .15s ease,box-shadow .15s ease}
.pressable:active{box-shadow:inset 3px 4px 9px rgba(96,106,132,.3),
  inset -1px -1px 3px rgba(255,255,255,.5);transform:scale(.985)}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:64px 0}
.hairline{border:0;border-top:1px solid var(--warmln);max-width:var(--maxw);margin:0 auto}

/* ---------- type ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.01em}
h1{font-size:clamp(34px,5.2vw,56px)}
h2{font-size:clamp(26px,3.4vw,36px)}
h3{font-size:21px}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--sap);margin-bottom:14px}
.lede{font-size:18.5px;color:var(--ink2);max-width:56ch}
.mono{font-family:var(--mono)}
.mut{color:var(--muted)}

/* ---------- nav ---------- */
nav.top{position:sticky;top:14px;z-index:50;margin:14px auto 0;max-width:var(--maxw);
  display:flex;align-items:center;gap:20px;padding:12px 20px}
.brand{font-family:var(--serif);font-size:21px;font-weight:700;color:var(--ink);
  text-decoration:none;letter-spacing:-.01em}
.brand .dot{color:var(--sap)}
nav.top .links{display:flex;gap:6px;margin-left:auto;align-items:center}
nav.top .links a{color:var(--ink2);text-decoration:none;font-size:15px;padding:8px 12px;
  border-radius:var(--rp);transition:all .15s ease}
nav.top .links a:hover{color:var(--ink);box-shadow:inset 2px 3px 8px rgba(96,106,132,.2),
  inset -1px -1px 2px rgba(255,255,255,.5)}
nav.top .links a.btn.sap,nav.top .links a.btn.sap:hover{color:#EEF3F8;
  box-shadow:6px 6px 14px rgba(96,106,132,.3),inset 0 1px 0 rgba(255,255,255,.22)}
@media (max-width:760px){nav.top .links a.hide-m{display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:var(--rp);
  font-size:15.5px;font-weight:600;text-decoration:none;cursor:pointer;border:0;
  transition:transform .15s var(--spring),box-shadow .15s ease}
.btn.sap{color:#EEF3F8;background:linear-gradient(145deg,var(--sap-hi),var(--sap-lo));
  box-shadow:6px 6px 14px rgba(96,106,132,.3),inset 0 1px 0 rgba(255,255,255,.22)}
.btn.sap:hover{transform:translateY(-1px);box-shadow:8px 10px 20px rgba(96,106,132,.34),
  inset 0 1px 0 rgba(255,255,255,.22)}
.btn.ghost{color:var(--ink);background:linear-gradient(150deg,rgba(255,255,255,.5),rgba(255,255,255,.26));
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border:1px solid rgba(255,255,255,.62);box-shadow:0 10px 24px rgba(96,106,132,.16)}
.btn.ghost:hover{transform:translateY(-1px)}
.btn.sm{padding:9px 16px;font-size:14px}

/* ---------- hero ---------- */
.hero{padding:84px 24px 56px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
@media (max-width:920px){.hero-grid{grid-template-columns:1fr}}
.hero .sub{margin:20px 0 30px}
.cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.cta-note{font-size:13.5px;color:var(--muted);margin-top:14px}

/* the call card mock */
.callcard{padding:22px;max-width:460px;margin-left:auto}
@media (max-width:920px){.callcard{margin:0 auto}}
.callcard .chead{display:flex;align-items:center;gap:12px;padding-bottom:14px;
  border-bottom:1px solid var(--warmln);margin-bottom:14px}
.pulse{width:38px;height:38px;border-radius:50%;background:linear-gradient(145deg,var(--sap-hi),var(--sap-lo));
  display:flex;align-items:center;justify-content:center;color:#fff;position:relative;flex:none}
.pulse::after{content:"";position:absolute;inset:-6px;border-radius:50%;
  border:2px solid rgba(28,78,130,.35);animation:ring 2.2s ease-out infinite}
@keyframes ring{0%{transform:scale(.8);opacity:1}100%{transform:scale(1.3);opacity:0}}
@media (prefers-reduced-motion:reduce){.pulse::after{animation:none}}
.chead .who{font-weight:650;font-size:15px}
.chead .stat{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--sap)}
.turn{display:flex;gap:10px;margin:10px 0;font-size:14.5px;line-height:1.5}
.turn .tag{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);
  flex:none;width:64px;padding-top:3px;text-transform:uppercase}
.turn.ai .tag{color:var(--sap)}
.turn p{color:var(--ink2)}
.turn.ai p{color:var(--ink)}
.verify{display:inline-flex;align-items:center;gap:7px;font-family:var(--mono);font-size:12px;
  color:var(--sap);padding:5px 12px;margin:8px 0 2px 74px}
.cfoot{display:flex;gap:10px;margin-top:14px;padding-top:14px;border-top:1px solid var(--warmln)}
.chip{font-family:var(--mono);font-size:11.5px;padding:6px 12px;border-radius:var(--rp);color:var(--ink2)}

/* ---------- hero checks + pain cards + demo + math ---------- */
.hero-checks{list-style:none;margin:18px 0 26px;display:grid;gap:10px}
.hero-checks li{font-size:15.5px;color:var(--ink2);padding-left:26px;position:relative}
.hero-checks li::before{content:"✓";position:absolute;left:0;color:var(--sap);font-weight:700}
.pains{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
@media (max-width:860px){.pains{grid-template-columns:1fr}}
.pain{padding:24px}
.pain .ptime{font-size:11.5px;letter-spacing:.12em;color:var(--coral);margin-bottom:10px}
.pain p{font-size:14.5px;color:var(--ink2)}
.pain strong{color:var(--ink)}
.demo-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;margin-top:36px;align-items:start}
@media (max-width:900px){.demo-grid{grid-template-columns:1fr}}
.chatdemo{padding:22px;display:flex;flex-direction:column;min-height:430px}
.chatdemo .dbody{flex:1;display:flex;flex-direction:column;gap:10px;justify-content:flex-end;
  overflow:hidden;padding:8px 2px;min-height:270px}
.dmsg{max-width:82%;padding:10px 14px;border-radius:16px;font-size:14.5px;line-height:1.45}
.dmsg.c{align-self:flex-end;background:linear-gradient(145deg,var(--sap-hi),var(--sap-lo));color:#EEF3F8;
  border-bottom-right-radius:6px}
.dmsg.a{align-self:flex-start;background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.7);
  color:var(--ink);border-bottom-left-radius:6px}
.dinput{margin-top:12px;padding:12px 16px;font-size:12.5px;color:var(--muted)}
.demo-side{display:grid;gap:16px}
.dpoint{padding:18px 20px;font-size:14.5px;color:var(--ink2)}
.dpoint .dnum{display:block;font-size:20px;color:var(--sap);font-weight:700;margin-bottom:6px}
.mathrow{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:36px}
@media (max-width:860px){.mathrow{grid-template-columns:1fr}}
.mcard{padding:24px}
.mcard .mtitle{font-weight:650;font-size:15.5px}
.mcard .mprice{font-size:22px;color:var(--ink2);margin:8px 0 10px}
.mcard.win .mprice{color:var(--sap);font-weight:700}
.mcard.win{border:1px solid rgba(28,78,130,.4)}
.mcard p{font-size:14px;color:var(--ink2)}
.plans.two{grid-template-columns:repeat(2,1fr);max-width:880px;margin-left:auto;margin-right:auto}
@media (max-width:900px){.plans.two{grid-template-columns:1fr;max-width:440px}}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
@media (max-width:860px){.steps{grid-template-columns:1fr}}
.step{padding:26px}
.step .n{font-family:var(--mono);font-size:12px;color:var(--sap);letter-spacing:.12em}
.step h3{margin:10px 0 8px}
.step p{font-size:15px;color:var(--ink2)}

/* ---------- features ---------- */
.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
@media (max-width:960px){.feats{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.feats{grid-template-columns:1fr}}
.feat{padding:24px;transition:transform .18s var(--spring),box-shadow .18s ease}
.feat:hover{transform:translateY(-3px)}
.feat .ico{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;
  justify-content:center;color:var(--sap);margin-bottom:14px}
.feat h3{font-size:17.5px;font-family:var(--sans);font-weight:650}
.feat p{font-size:14.5px;color:var(--ink2);margin-top:6px}

/* ---------- pricing ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
@media (max-width:900px){.plans{grid-template-columns:1fr;max-width:440px;margin-left:auto;margin-right:auto}}
.plan{padding:28px;display:flex;flex-direction:column}
.plan.star{border:1px solid rgba(28,78,130,.4);position:relative}
.plan .badge{position:absolute;top:-11px;left:24px;font-family:var(--mono);font-size:11px;
  letter-spacing:.1em;color:#EEF3F8;background:linear-gradient(145deg,var(--sap-hi),var(--sap-lo));
  padding:4px 12px;border-radius:var(--rp)}
.plan .pname{font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink2)}
.plan .price{font-family:var(--serif);font-size:40px;font-weight:600;margin:10px 0 2px}
.plan .price span{font-family:var(--sans);font-size:14px;color:var(--muted);font-weight:400}
.plan ul{list-style:none;margin:18px 0 24px;display:grid;gap:10px}
.plan li{font-size:14.5px;color:var(--ink2);padding-left:24px;position:relative}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--sap);font-weight:700}
.plan .btn{margin-top:auto;justify-content:center}
.packs{margin-top:22px;padding:18px 24px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.packs .mono{font-size:13px;color:var(--ink2)}

/* ---------- faq ---------- */
.faq{max-width:760px;margin:36px auto 0;display:grid;gap:12px}
.faq details{padding:4px 22px}
.faq summary{font-weight:650;font-size:16px;padding:14px 0;cursor:pointer;list-style:none;
  display:flex;align-items:center}
.faq summary::after{content:"+";margin-left:auto;font-family:var(--mono);font-size:18px;color:var(--sap);
  transition:transform .2s ease}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 0 16px;color:var(--ink2);font-size:15px}

/* ---------- final cta ---------- */
.final{padding:56px 32px;text-align:center}
.final h2{margin-bottom:12px}
.final p{color:var(--ink2);margin-bottom:26px}

/* ---------- footer ---------- */
footer{padding:44px 0 60px;font-size:14px;color:var(--muted)}
footer .cols{display:flex;gap:40px;flex-wrap:wrap;justify-content:space-between;align-items:flex-start}
footer a{color:var(--ink2);text-decoration:none;display:inline-block;padding:4px 10px;border-radius:var(--rp);
  transition:box-shadow .15s ease}
footer a:hover{box-shadow:inset 2px 3px 8px rgba(96,106,132,.2),inset -1px -1px 2px rgba(255,255,255,.5)}
footer .flinks{display:flex;gap:4px;flex-wrap:wrap}

/* ---------- legal / doc pages ---------- */
.doc{max-width:760px;margin:40px auto 80px;padding:44px 48px}
.doc h1{font-size:32px;margin-bottom:6px}
.doc .upd{font-family:var(--mono);font-size:12.5px;color:var(--muted);margin-bottom:28px}
.doc h2{font-size:21px;margin:30px 0 10px}
.doc p,.doc li{font-size:15px;color:var(--ink2)}
.doc ul{padding-left:22px;margin:10px 0}
.doc strong{color:var(--ink)}
@media (max-width:640px){.doc{padding:30px 22px}}

/* reveal on scroll: content visible by default, animation is enhancement only */
.rv{opacity:1;transform:none}
@media (prefers-reduced-motion:no-preference){
  .rv.pre{opacity:0;transform:translateY(14px)}
  .rv.in{opacity:1;transform:none;transition:opacity .5s ease,transform .5s var(--spring)}
}