/* ===== Tacit marketing site — shared styles ===== */
:root{
  --paper:#EFECE6;
  --ink:#1C1C1E;
  --ink2:#6B6B70;
  --ink3:#8A8A8F;
  --accent:#3A5A78;
  --accent-hover:#2D4A64;
  --accent-muted:#587896;
  --bloom-blue:#D4E2EF;
  --bloom-lilac:#E6DDEC;
  --hair:rgba(30,40,60,.08);
  --card:rgba(255,255,255,.58);
  --card-solid:#FBFAF7;
  --sys:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display",system-ui,"Segoe UI",sans-serif;
  --round:ui-rounded,"SF Pro Rounded","Nunito",var(--sys);
  --serif:ui-serif,"New York",Georgia,"Times New Roman",serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --maxw:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sys);
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(58% 45% at 8% 2%, var(--bloom-blue) 0%, rgba(212,226,239,0) 55%),
    radial-gradient(50% 40% at 98% 6%, var(--bloom-lilac) 0%, rgba(230,221,236,0) 52%),
    radial-gradient(60% 50% at 92% 96%, var(--bloom-blue) 0%, rgba(212,226,239,0) 50%);
  background-attachment:fixed;
  background-repeat:no-repeat;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-hover)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
.narrow{max-width:720px}

/* ===== brand mark: dot → text caret → arrow that flies (matches the app) ===== */
.mark{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;flex:none;overflow:visible;
  animation:markFly 7.2s cubic-bezier(.5,0,.3,1) infinite}
.mark i{position:relative;display:block;width:26px;height:26px;background:var(--accent);
  border-radius:100px;transform-origin:center;
  animation:markCore 7.2s cubic-bezier(.55,0,.3,1) infinite}
.mark i::before,.mark i::after{content:"";position:absolute;left:50%;top:-9px;
  width:8px;height:27px;background:var(--accent);border-radius:100px;
  transform-origin:50% 4px;opacity:0;
  animation:markHead 7.2s cubic-bezier(.55,0,.3,1) infinite}
.mark i::before{transform:translateX(-50%) rotate(-40deg)}
.mark i::after{transform:translateX(-50%) rotate(40deg)}
@keyframes markCore{
  0%,20%   {width:26px;height:26px;transform:rotate(0deg)}
  30%,44%  {width:8px;height:30px;transform:rotate(0deg)}    /* text caret */
  56%,78%  {width:8px;height:30px;transform:rotate(90deg)}   /* arrow shaft */
  88%,100% {width:26px;height:26px;transform:rotate(0deg)}
}
@keyframes markHead{
  0%,48%   {opacity:0}
  56%,78%  {opacity:1}
  84%,100% {opacity:0}
}
@keyframes markFly{
  0%,70%   {transform:translateX(0);opacity:1}
  80%      {transform:translateX(22px);opacity:0}
  81%,86%  {transform:translateX(0);opacity:0}
  93%,100% {transform:translateX(0);opacity:1}
}
/* header logo = calm solid dot that hints the brand story on hover */
.logo .mark{animation:none;width:15px;height:16px}
.logo .mark i{animation:none;width:14px;height:14px;border-radius:50%;
  transition:width .32s cubic-bezier(.4,0,.2,1),height .32s cubic-bezier(.4,0,.2,1),border-radius .32s ease}
.logo .mark i::before,.logo .mark i::after{display:none;animation:none}
.logo:hover .mark i{width:5px;height:17px;border-radius:2px}

/* ===== header ===== */
header.nav{position:sticky;top:0;z-index:50;
  background:rgba(239,236,230,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--hair)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:650;letter-spacing:-.035em;font-size:18px}
.logo:hover{color:var(--ink)}
.nav-links{display:flex;align-items:center;gap:28px;font-size:14.5px}
.nav-links a{color:var(--ink2)}
.nav-links a:hover{color:var(--accent)}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:11px;font-size:15px;font-weight:600;
  letter-spacing:-.01em;border:none;cursor:pointer;font-family:var(--sys)}
.btn-primary{background:var(--accent);color:#fff;
  box-shadow:0 1px 2px rgba(30,40,60,.28),inset 0 1px 0 rgba(255,255,255,.18)}
.btn-primary:hover{background:var(--accent-hover);color:#fff}
.btn-disabled{background:rgba(58,90,120,.16);color:var(--accent);cursor:default;
  box-shadow:inset 0 0 0 1px rgba(58,90,120,.12)}
.btn-disabled:hover{color:var(--accent)}

/* ===== cards ===== */
.card{background:var(--card);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border:1px solid var(--hair);border-radius:16px;
  box-shadow:0 1px 2px rgba(30,40,60,.05),0 18px 40px -22px rgba(30,40,60,.28),inset 0 1px 0 rgba(255,255,255,.6)}

/* ===== section rhythm ===== */
section{padding:76px 0}
.eyebrow{font:600 12px/1 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
h1,h2,h3{letter-spacing:-.025em;text-wrap:balance;margin:0}
h2{font-size:clamp(26px,3.4vw,36px);font-weight:600;line-height:1.12}
h3{font-size:19px;font-weight:600;letter-spacing:-.02em}
.lead{color:var(--ink2);font-size:17px;line-height:1.55;max-width:620px}
.sec-head{margin-bottom:40px}
.sec-head h2{margin-top:12px}
.sec-head p{margin:14px 0 0;color:var(--ink2);font-size:16px;max-width:620px}

/* ===== hero ===== */
.hero{padding:96px 0 72px;text-align:center}
.hero .mark{margin-bottom:28px}
.hero h1{font-size:clamp(34px,5.6vw,60px);font-weight:600;line-height:1.04;letter-spacing:-.035em;max-width:14ch;margin:0 auto}
/* fixed-width slot: JS locks --rotor-w to the widest word (+caret) so the whole
   H1 line never reflows as the word types/erases. The slot has a constant width,
   so the centred H1 stays put; the word is left-aligned inside it and the caret
   trails the word, both absorbed by the slot's fixed right edge. */
.rotor{display:inline-flex;align-items:baseline;justify-content:flex-start;
  width:var(--rotor-w,auto);vertical-align:baseline;white-space:nowrap;overflow:visible}
.rotor-word{display:inline-block;white-space:nowrap;color:var(--accent)}
.rotor-caret{display:inline-block;flex:none;width:4px;height:.74em;background:var(--accent);
  margin-left:6px;border-radius:2px;align-self:baseline;position:relative;top:.02em;
  animation:blink 1.05s steps(1) infinite}
.hero .lead{margin:26px auto 0;font-size:19px;max-width:600px;color:var(--ink2)}
.hero-cta{margin-top:38px;display:flex;flex-direction:column;align-items:center;gap:16px}
.hero-note{font-size:14.5px;color:var(--ink3)}

/* ===== demo showcase ===== */
.showcase{padding:22px 22px 20px;display:flex;flex-direction:column;gap:18px}
.sc-tabs{display:flex;gap:6px;background:rgba(58,90,120,.07);border-radius:11px;padding:4px;align-self:flex-start}
.stab{border:none;background:transparent;font-family:var(--sys);font-size:13.5px;font-weight:600;
  letter-spacing:-.01em;color:var(--ink3);padding:7px 16px;border-radius:8px;cursor:pointer;transition:color .2s}
.stab:hover{color:var(--accent)}
.stab.active{background:#fff;color:var(--accent);box-shadow:0 1px 2px rgba(30,40,60,.14)}
.sc-stage{position:relative;min-height:236px}
.scene{position:absolute;inset:0;opacity:0;transform:translateY(8px);pointer-events:none;
  transition:opacity .45s ease,transform .45s ease;display:flex;flex-direction:column;justify-content:center}
.scene.active{opacity:1;transform:none;pointer-events:auto}
.tt{white-space:pre-wrap}

/* chat */
.chat-thread{display:flex;flex-direction:column;gap:12px;padding:6px 4px}
.msg{display:flex}
.msg.out{justify-content:flex-end}
.bubble{max-width:78%;padding:12px 16px;border-radius:20px;font-size:16px;line-height:1.4}
.msg.in .bubble{background:#E9E6DF;color:var(--ink);border-bottom-left-radius:6px}
.msg.out .bubble{background:var(--accent);color:#fff;border-bottom-right-radius:6px}
.bubble.gen{font-family:var(--round);font-weight:500;min-height:1.4em}
.msg.out .caret{background:rgba(255,255,255,.85)}

/* email */
.mail{padding:6px 6px 4px;display:flex;flex-direction:column;gap:0}
.mail-row{display:flex;gap:14px;align-items:baseline;padding:9px 2px;border-bottom:1px solid var(--hair)}
.mail-row .ml{font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink3);width:64px;flex:none}
.mail-row .mv{font-size:15px;color:var(--ink);font-weight:500}
.mail-quote{margin:16px 0 14px;padding-left:14px;border-left:3px solid rgba(58,90,120,.25);
  color:var(--ink3);font-family:var(--serif);font-size:15.5px;font-style:italic;line-height:1.5}
.mail-reply{font-family:var(--serif);font-size:17px;color:var(--ink);line-height:1.5;min-height:1.5em}

/* code editor (light) */
.editor{border:1px solid var(--hair);border-radius:12px;overflow:hidden;background:#FBFAF7}
.ed-tab{font:600 12px/1 var(--mono);color:var(--ink2);padding:11px 16px;background:rgba(58,90,120,.05);
  border-bottom:1px solid var(--hair)}
.ed-body{padding:12px 4px;font-family:var(--mono);font-size:13.5px;line-height:1.85}
.cl{display:flex;gap:14px;padding:0 14px}
.cl .g{color:var(--ink3);opacity:.6;width:20px;text-align:right;flex:none;user-select:none}
.cl.add{background:rgba(79,138,94,.09)}
.cl .kw{color:var(--accent)}
.cl .cm{color:var(--ink3);font-style:italic}
.commit{border-top:1px solid var(--hair);padding:13px 16px;display:flex;flex-direction:column;gap:7px}
.commit-l{font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink3)}
.commit-v{font-family:var(--mono);font-size:14px;color:var(--ink);min-height:1.4em}

.sc-cap{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink3);padding:2px 4px}
.sc-cap .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-muted);flex:none}

.caret{display:inline-block;width:2px;height:1.05em;background:var(--accent);
  margin-left:1px;vertical-align:-2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{0%,49%{opacity:1}50%,100%{opacity:0}}

/* ===== how it works ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{padding:28px 26px}
.step .gmark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;flex:none}
.step .gmark i{position:relative;display:block;background:var(--accent);border-radius:100px}
.g-dot i{width:17px;height:17px;animation:gPress 3.6s cubic-bezier(.5,0,.3,1) 0s infinite}
.g-cursor i{width:6px;height:21px;animation:gBlink 3.6s cubic-bezier(.5,0,.3,1) .45s infinite}
.g-arrow i{width:6px;height:21px;transform:rotate(90deg);animation:gFly 3.6s cubic-bezier(.5,0,.3,1) .9s infinite}
.g-arrow i::before,.g-arrow i::after{content:"";position:absolute;left:50%;top:-6px;
  width:6px;height:19px;background:var(--accent);border-radius:100px;transform-origin:50% 3px}
.g-arrow i::before{transform:translateX(-50%) rotate(-40deg)}
.g-arrow i::after{transform:translateX(-50%) rotate(40deg)}
@keyframes gPress{0%{transform:scale(1)}9%{transform:scale(.62)}18%,100%{transform:scale(1)}}
@keyframes gBlink{0%{opacity:1}9%{opacity:.18}18%,100%{opacity:1}}
@keyframes gFly{0%{transform:rotate(90deg) translateY(0)}11%{transform:rotate(90deg) translateY(-11px)}20%,100%{transform:rotate(90deg) translateY(0)}}
.step h3{margin:16px 0 8px}
.step p{margin:0;color:var(--ink2);font-size:14.5px;line-height:1.5}

/* ===== privacy block ===== */
.privacy-block{padding:56px 52px}
.privacy-block h2{max-width:16ch}
.privacy-block ul{list-style:none;margin:26px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:18px 40px}
.privacy-block li{position:relative;padding-left:26px;color:var(--ink2);font-size:15.5px;line-height:1.5}
.privacy-block li::before{content:"";position:absolute;left:2px;top:8px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
.privacy-block .more{margin-top:30px}

/* ===== pricing ===== */
.price-intro{text-align:center;margin-bottom:34px;color:var(--ink2);font-size:15.5px}
.price-intro b{color:var(--ink);font-weight:600}
.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price{padding:30px 28px 32px;display:flex;flex-direction:column;gap:6px;position:relative}
.price.popular{border-color:rgba(58,90,120,.35);box-shadow:0 1px 2px rgba(30,40,60,.06),0 26px 50px -24px rgba(58,90,120,.45),inset 0 1px 0 rgba(255,255,255,.65)}
.price .tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:#fff;font:600 11px/1 var(--sys);letter-spacing:.02em;
  padding:6px 12px;border-radius:20px;white-space:nowrap}
.price .plan{font-size:16px;font-weight:600;letter-spacing:-.01em}
.price .amt{font-size:38px;font-weight:600;letter-spacing:-.03em;margin-top:6px}
.price .amt span{font-size:15px;font-weight:500;color:var(--ink3);letter-spacing:0}
.price .desc{color:var(--ink2);font-size:14.5px;line-height:1.5;margin:8px 0 22px;min-height:42px}
.price .pbtn{margin-top:auto}

/* ===== faq ===== */
.faq{display:grid;gap:14px}
.faq details{padding:20px 24px;cursor:pointer}
.faq summary{list-style:none;font-size:16px;font-weight:600;letter-spacing:-.01em;
  display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-weight:400;font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:14px 0 0;color:var(--ink2);font-size:15px;line-height:1.6}

/* ===== footer ===== */
footer.site{border-top:1px solid var(--hair);padding:36px 0;margin-top:20px}
footer.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px 16px;
  color:var(--ink3);font-size:13.5px;text-align:center}
footer.site .sep{color:rgba(30,40,60,.25)}
footer.site a{color:var(--ink2)}
footer.site a:hover{color:var(--accent)}

/* ===== text pages (privacy / terms) ===== */
.doc{padding:60px 0 40px}
.doc .card{padding:52px 56px}
.doc h1{font-size:34px;font-weight:600;letter-spacing:-.03em}
.doc .updated{color:var(--ink3);font-size:13.5px;margin-top:10px;font-family:var(--mono);letter-spacing:.02em}
.doc h2{font-size:20px;margin-top:38px}
.doc h2:first-of-type{margin-top:30px}
.doc p,.doc li{color:var(--ink2);font-size:15.5px;line-height:1.68}
.doc p{margin:12px 0 0}
.doc ul{margin:12px 0 0;padding-left:22px}
.doc li{margin:6px 0}
.doc strong{color:var(--ink);font-weight:600}
.doc .intro{font-size:16.5px;color:var(--ink);margin-top:18px}
.back{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--ink2);margin-bottom:26px}
.back:hover{color:var(--accent)}

@media(max-width:860px){
  .demos,.steps,.prices{grid-template-columns:1fr}
  .privacy-block{padding:40px 30px}
  .privacy-block ul{grid-template-columns:1fr}
  .doc .card{padding:36px 26px}
  .nav-links{gap:18px}
  section{padding:56px 0}
}