/* PaperX homepage: deep black, one blue accent, product-first */
body.home{background:#05070b;overflow-x:hidden}
body.home::before{content:"";position:absolute;inset:0 0 auto 0;height:900px;background:radial-gradient(70% 60% at 50% 0%,rgba(59,130,246,.16),rgba(59,130,246,0) 70%);pointer-events:none;z-index:0}
.home a{color:inherit}.home a:hover{text-decoration:none}
.home :focus-visible{outline:2px solid #6aa3ff;outline-offset:3px;border-radius:8px}

/* nav */
.topnav{position:sticky;top:0;z-index:20;backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);background:rgba(5,7,11,.72);border-bottom:1px solid rgba(255,255,255,.05)}
.topnav-in{max-width:1180px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.topnav .nav-links{gap:26px}.topnav .nav-links a{color:#8e9ab0;font-weight:500;transition:color .2s}.topnav .nav-links a:hover{color:#fff}
.topnav .nav-links a.btn{color:#fff}
.btn.sm{padding:8px 14px;font-size:13.5px;border-radius:9px}

/* buttons */
.home .btn{transition:background .2s,border-color .2s,transform .2s,box-shadow .25s,color .2s}
.home .btn.primary{background:#3b82f6;border-color:#3b82f6;box-shadow:0 0 0 0 rgba(59,130,246,0)}
.home .btn.primary:hover{background:#4d8fff;border-color:#4d8fff;transform:translateY(-1px);box-shadow:0 10px 30px -8px rgba(59,130,246,.65)}
.btn.lg{height:54px;padding:0 28px;font-size:16px;border-radius:12px}
.btn.quiet{background:transparent;border-color:rgba(255,255,255,.12);color:#c9d3e3;height:54px;padding:0 24px;font-size:15px;border-radius:12px}
.btn.quiet:hover{border-color:rgba(255,255,255,.28);color:#fff;background:rgba(255,255,255,.04)}

/* hero */
.hero{position:relative;z-index:1;text-align:center;padding:92px 24px 0;max-width:1180px;margin:0 auto}
.hero-in h1{font-size:clamp(44px,8.4vw,92px);line-height:1.01;letter-spacing:-.045em;font-weight:760;color:#f4f7fc}
.hero-line{color:#93a0b6;font-size:clamp(17px,2.2vw,21px);margin:24px auto 0;max-width:none}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.stage{position:relative;margin:72px auto 0;max-width:1080px}
.stage-glow{position:absolute;left:50%;top:6%;width:120%;height:90%;transform:translateX(-50%);background:radial-gradient(closest-side,rgba(59,130,246,.30),rgba(59,130,246,0) 72%);filter:blur(30px);pointer-events:none}
.window{position:relative;margin:0;border-radius:18px 18px 0 0;overflow:hidden;max-height:640px;border:1px solid rgba(255,255,255,.09);border-bottom:0;background:#0a0e15;box-shadow:0 -1px 0 rgba(120,170,255,.25) inset,0 50px 120px -30px rgba(0,0,0,.9),0 0 0 1px rgba(59,130,246,.10);-webkit-mask-image:linear-gradient(#000 72%,transparent 100%);mask-image:linear-gradient(#000 72%,transparent 100%)}
.window-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;background:#0c1119;border-bottom:1px solid rgba(255,255,255,.06);color:#6f7c92;font-size:12.5px;font-weight:600}
.window-bar i{width:10px;height:10px;border-radius:50%;background:#1d2635}.window-bar span{margin-left:10px}
.window img{display:block;width:100%;height:auto}
.stage-note{position:relative;margin:14px 0 0;color:#6f7c92;font-size:13px}

/* entrance: one orchestrated moment on load */
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
.hero-in h1,.hero-line,.hero-actions,.stage{animation:rise .8s cubic-bezier(.2,.7,.2,1) both}
.hero-line{animation-delay:.08s}.hero-actions{animation-delay:.16s}.stage{animation-delay:.28s;animation-duration:1s}

/* sections */
main{position:relative;z-index:1}
.section-in{max-width:1120px;margin:0 auto;padding:0 24px}.section-in.narrow{max-width:700px}
main h2{font-size:clamp(30px,4.6vw,46px);line-height:1.08;letter-spacing:-.035em;font-weight:720;text-align:center;color:#f1f5fb}
.section-sub{color:#8e9ab0;text-align:center;margin:14px auto 0;font-size:17px}
.showcase{padding:110px 0 40px}
.tabs{display:flex;justify-content:center;gap:4px;margin:34px auto 0;padding:4px;width:max-content;max-width:100%;background:#0a0e15;border:1px solid rgba(255,255,255,.08);border-radius:14px}
.tab{appearance:none;border:0;background:transparent;color:#8e9ab0;font:600 15px Inter,system-ui,sans-serif;padding:11px 24px;border-radius:10px;cursor:pointer;transition:background .25s,color .25s}
.tab:hover{color:#fff}.tab[aria-selected=true]{background:#3b82f6;color:#fff;box-shadow:0 6px 20px -6px rgba(59,130,246,.7)}
.tab-desc{text-align:center;color:#a7b3c7;margin:22px auto 0;font-size:17px;max-width:560px;min-height:52px;transition:opacity .25s}
.tab-desc.swap{opacity:0}
.viewer{position:relative;max-width:900px;margin:26px auto 0;aspect-ratio:1520/1184;border-radius:18px;border:1px solid rgba(255,255,255,.09);background:#0a0e15;overflow:hidden;box-shadow:0 60px 120px -40px rgba(0,0,0,.9),0 0 0 1px rgba(59,130,246,.10),0 0 140px -30px rgba(59,130,246,.28)}
.slide{position:absolute;inset:0;margin:0;opacity:0;transform:scale(1.015);transition:opacity .5s ease,transform .6s cubic-bezier(.2,.7,.2,1);pointer-events:none}
.slide.on{opacity:1;transform:none;pointer-events:auto}
.slide img{display:block;width:100%;height:100%}
.sample-note{text-align:center;color:#6f7c92;font-size:13px;margin:16px 0 0}

.how{padding:110px 0 30px}
.flow{list-style:none;padding:0;margin:56px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.flow li{border-top:1px solid rgba(255,255,255,.12);padding-top:22px;transition:border-color .3s}
.flow li:hover{border-top-color:#3b82f6}
.flow h3{font-size:18px;font-weight:650;letter-spacing:-.015em;color:#f1f5fb;margin:0 0 10px}
.flow p{margin:0;color:#8e9ab0;font-size:15.5px}
.how .fine-note{max-width:760px;margin:44px auto 0;color:#78859b;font-size:13.5px;line-height:1.6}

.pricing{padding:110px 0 30px}
.plans{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:820px;margin:46px auto 0}
.plans .plan{position:relative;display:flex;flex-direction:column;gap:16px;padding:32px 30px;border-radius:20px;background:linear-gradient(180deg,#0b1018,#080b11);border:1px solid rgba(255,255,255,.08);transition:border-color .3s,transform .3s}
.plans .plan:hover{border-color:rgba(255,255,255,.18);transform:translateY(-2px)}
.plans .plan.best{border-color:rgba(59,130,246,.55);box-shadow:0 0 0 1px rgba(59,130,246,.2) inset,0 40px 100px -40px rgba(59,130,246,.55)}
.plans .plan.best:hover{border-color:#5c9bff}
.plans .tag{position:absolute;top:-11px;left:30px;right:auto;background:#3b82f6;color:#fff;font-size:11px;font-weight:700;letter-spacing:.04em;padding:4px 10px;border-radius:999px}
.plans .name{font-weight:650;font-size:16px;color:#c9d3e3}
.plans .price{font-size:48px;font-weight:760;letter-spacing:-.045em;line-height:1;color:#f4f7fc}
.plans .price small{font-size:15px;color:#8e9ab0;font-weight:500;letter-spacing:0}
.plans ul{margin:4px 0 8px;padding:0;list-style:none;display:grid;gap:10px;color:#a7b3c7}
.plans li::before{content:"✓ ";color:#3b82f6;font-weight:700}
.plans .btn.block{height:48px;border-radius:12px}
.plans .btn:not(.primary){background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12)}.plans .btn:not(.primary):hover{background:rgba(255,255,255,.08)}
.plans .fine{font-size:12.5px;color:#78859b}

.steps-sec{padding:110px 0 20px}
.steps-sec .steps{margin:44px 0 0;gap:18px}
.steps-sec .steps li{color:#8e9ab0}.steps-sec .steps li strong{color:#eef2f8}
.steps-sec .steps li::before{background:rgba(59,130,246,.10);border-color:rgba(59,130,246,.35)}

.site-foot{max-width:none;border-top:1px solid rgba(255,255,255,.06);margin-top:100px;padding:30px 24px 48px;color:#6f7c92;font-size:13px;text-align:center;position:relative;z-index:1}

@media(max-width:820px){
  .flow{grid-template-columns:1fr;gap:28px}
  .plans{grid-template-columns:1fr}
}
@media(max-width:600px){
  .topnav-in{padding:12px 16px}.topnav .nav-links{gap:14px}.topnav .nav-links a:not(.btn){display:none}
  .hero{padding:56px 18px 0}.hero-actions .btn{width:100%}
  .stage{margin-top:48px}.window{max-height:380px;border-radius:12px 12px 0 0}.window-bar{padding:9px 12px}
  .showcase,.how,.pricing,.steps-sec{padding-top:72px}
  .tab{padding:10px 14px;font-size:14px}.tab-desc{font-size:15.5px;min-height:70px}
  .viewer{border-radius:12px}.section-in{padding:0 18px}
  .plans .price{font-size:42px}
}
@media(prefers-reduced-motion:reduce){
  .hero-in h1,.hero-line,.hero-actions,.stage{animation:none}
  .slide,.tab-desc,.home .btn,.plan,.flow li{transition:none}
}
html{overflow-x:clip}.hero{overflow-x:clip}