/* Wind Correction — site styles.
   Palette taken from the app itself: #4374ba on #eaf4fe. */

:root{
  --blue:#4374ba;
  --blue-deep:#2f568f;
  --blue-ink:#28456f;
  --sky:#eaf4fe;
  --sky-2:#dceaf9;
  --ink:#0f172a;
  --muted:#5b6b83;
  --hairline:#dfe7f2;
  --surface:#ffffff;
  --radius:18px;
  --radius-lg:26px;
  --shadow:0 18px 44px -24px rgb(15 23 42 / .35);
  --shadow-soft:0 10px 30px -18px rgb(15 23 42 / .3);
  --max:1120px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  font-family:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--ink);
  background:var(--surface);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{line-height:1.12;letter-spacing:-.02em;margin:0}
.container{width:min(var(--max),100% - 32px);margin-inline:auto}
section{scroll-margin-top:104px}

/* ---------- header ----------
   Same floating pill as lorenzo-galli.com: fixed, dark, translucent,
   rounded-full, with the accent colour on the call to action. */
.site-header{position:fixed;inset:0 0 auto 0;z-index:60;padding:16px;pointer-events:none}
.header-shell{width:min(920px,100%);margin-inline:auto;pointer-events:auto}
.header-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  height:64px;padding:0 12px;border-radius:999px;
  background:oklch(0.18 0.004 260 / .4);border:1px solid rgb(255 255 255 / .1);
  backdrop-filter:saturate(160%) blur(12px);color:#fff;
  box-shadow:0 20px 50px -30px rgb(15 23 42 / .8);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand-badge{display:grid;place-items:center;flex:none}
.brand-badge img{width:44px}
.brand-badge.small img{width:34px}
.brand-name{font-size:1rem;font-weight:700;letter-spacing:-.01em;color:#fff}
.nav-desktop{display:flex;align-items:center;gap:2px}
.nav-link{
  padding:8px 12px;border-radius:999px;text-decoration:none;
  font-size:.875rem;color:rgb(255 255 255 / .78);transition:color .2s,background .2s;
}
.nav-desktop .nav-link:hover,.nav-desktop .nav-link.active{color:#fff}
.header-actions{display:flex;align-items:center;gap:8px;flex:none}
.cta{
  display:inline-flex;align-items:center;height:40px;padding:0 20px;border-radius:999px;
  background:var(--blue);color:#fff;font-size:.875rem;font-weight:700;text-decoration:none;
  white-space:nowrap;transition:filter .2s,transform .08s;
}
.cta:hover{filter:brightness(1.08)}
.cta:active{transform:translateY(1px)}
.burger{
  display:none;width:40px;height:40px;place-items:center;cursor:pointer;
  border-radius:999px;border:1px solid rgb(255 255 255 / .1);background:none;color:#fff;
}
.burger svg{width:18px;height:18px}
.nav-mobile{
  display:flex;flex-direction:column;gap:2px;margin-top:8px;padding:12px;
  border-radius:26px;background:oklch(0.18 0.004 260 / .55);border:1px solid rgb(255 255 255 / .1);
  backdrop-filter:saturate(160%) blur(12px);
  box-shadow:0 20px 50px -30px rgb(15 23 42 / .8);
}
.nav-mobile[hidden]{display:none}
.nav-mobile .nav-link{padding:12px 14px;border-radius:14px;color:rgb(255 255 255 / .7)}
.nav-mobile .nav-link:hover,.nav-mobile .nav-link.active{background:rgb(255 255 255 / .06);color:#fff}

/* ---------- shared ---------- */
.eyebrow{
  margin:0 0 12px;font-size:.75rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--blue);
}
.display{font-size:clamp(2.75rem,7vw,4.75rem);font-weight:800}
.section{padding:clamp(72px,9vw,120px) 0}
.section-sky{background:var(--sky)}
.section-head{max-width:720px;margin:0 auto clamp(36px,5vw,56px);text-align:center}
.section-title{font-size:clamp(2rem,4vw,3rem);font-weight:800}
.section-title.left{text-align:left}
.section-lead{margin:16px 0 0;color:var(--muted);font-size:1.05rem}
.section-lead.left{text-align:left}
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- hero ---------- */
.hero{background:var(--surface);--phone-w:min(620px,88vw)}
.hero-sky{
  background:linear-gradient(180deg,var(--sky) 0%,var(--sky-2) 100%);
  /* the bottom padding carries half the phone, so the mockup sits exactly
     half on the celeste and half on the white below it */
  padding:clamp(116px,13vw,160px) 0 calc(var(--phone-w) * .487 + clamp(28px,4vw,52px));
  text-align:center;
}
.hero-inner{max-width:780px}
.lead{margin:20px auto 0;max-width:640px;color:var(--blue-ink);font-size:1.1rem}
.hero-actions{margin-top:32px}
.store-link{display:inline-block;transition:transform .2s,filter .2s}
.store-link:hover{transform:translateY(-2px);filter:drop-shadow(0 10px 20px rgb(15 23 42 / .22))}
.store-link img{width:172px}

/* il phone mockup sta esattamente a metà fra il celeste e il bianco */
.hero-phone{
  width:var(--phone-w);
  margin:calc(var(--phone-w) * -.487) auto 0;
  padding-bottom:clamp(48px,6vw,80px);
}
.hero-phone img{filter:drop-shadow(0 26px 50px rgb(15 23 42 / .22))}

/* ---------- calculator ---------- */
.calc{
  background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius-lg);
  padding:clamp(20px,3vw,32px);box-shadow:var(--shadow);
}
.calc-events{display:flex;flex-wrap:wrap;gap:8px}
.calc-events button{
  font:inherit;font-size:.88rem;font-weight:600;cursor:pointer;
  padding:9px 16px;border-radius:999px;border:1px solid var(--hairline);
  background:var(--surface);color:var(--muted);transition:.2s;
}
.calc-events button:hover{border-color:var(--blue);color:var(--blue-deep)}
.calc-events button[aria-pressed="true"]{background:var(--blue);border-color:var(--blue);color:#fff}
.calc-grid{margin-top:26px;display:grid;gap:28px;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}
.calc-controls{display:flex;flex-direction:column;justify-content:space-between;gap:22px}
.field{display:block}
.field-label{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  font-size:.88rem;font-weight:600;margin-bottom:8px;
}
.field .value{font-variant-numeric:tabular-nums;font-weight:700;color:var(--blue-deep)}
.field-hint{display:block;margin-top:6px;font-size:.78rem;color:var(--muted);min-height:1.2em}
.field-hint.error{color:#b3401f}
#mark{
  font:inherit;font-size:1.35rem;font-weight:700;font-variant-numeric:tabular-nums;
  width:100%;height:58px;padding:0 18px;border-radius:14px;
  border:1px solid var(--hairline);background:var(--sky);color:var(--ink);
  outline:none;transition:border-color .2s,box-shadow .2s,background .2s;
}
#mark:focus{border-color:var(--blue);background:var(--surface);box-shadow:0 0 0 4px rgb(67 116 186 / .16)}
#mark::placeholder{color:#9fb1c8;font-weight:500}
.slider{
  -webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:999px;
  background:var(--sky-2);outline:none;cursor:pointer;
}
.slider::-webkit-slider-thumb{
  -webkit-appearance:none;width:22px;height:22px;border-radius:50%;
  background:var(--blue);border:3px solid #fff;box-shadow:var(--shadow-soft);cursor:grab;
}
.slider::-moz-range-thumb{
  width:22px;height:22px;border-radius:50%;background:var(--blue);
  border:3px solid #fff;box-shadow:var(--shadow-soft);cursor:grab;
}
.slider:focus-visible{box-shadow:0 0 0 4px rgb(67 116 186 / .18)}
.scale{display:flex;justify-content:space-between;margin-top:6px;font-size:.72rem;color:var(--muted);font-variant-numeric:tabular-nums}
.presets{display:flex;flex-wrap:wrap;gap:8px}
.presets button{
  font:inherit;font-size:.8rem;font-weight:600;cursor:pointer;padding:7px 13px;
  border-radius:999px;border:1px dashed var(--hairline);background:transparent;color:var(--muted);transition:.2s;
}
.presets button:hover{border-style:solid;border-color:var(--blue);color:var(--blue-deep);background:var(--sky)}

.calc-out{display:flex;flex-direction:column;gap:18px;min-width:0}
.result{
  background:linear-gradient(160deg,var(--blue) 0%,var(--blue-deep) 100%);
  color:#fff;border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow-soft);
}
.result-label{margin:0;font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;opacity:.78}
.result-value{
  margin:6px 0 0;font-size:clamp(2.6rem,6vw,3.6rem);font-weight:800;line-height:1;
  font-variant-numeric:tabular-nums;letter-spacing:-.03em;
}
.result-value .unit{font-size:1.1rem;font-weight:600;margin-left:8px;opacity:.8;letter-spacing:0}
.result-delta{margin:10px 0 0;font-size:.9rem;opacity:.85}
.result.empty{background:var(--sky);color:var(--blue-ink);box-shadow:none}
.result.empty .result-value{opacity:.45}
.result.empty .unit{display:none}

.chart{margin:0}
.chart figcaption{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:8px;margin-bottom:10px}
.chart-title{font-size:.88rem;font-weight:600}
.chart-sub{font-size:.75rem;color:var(--muted)}
.chart-plot{position:relative;border:1px solid var(--hairline);border-radius:var(--radius);background:var(--surface);overflow:hidden}
#chart-svg{display:block;width:100%;height:clamp(200px,26vw,264px)}
.tooltip{
  position:absolute;pointer-events:none;transform:translate(-50%,-115%);
  background:var(--ink);color:#fff;font-size:.76rem;font-weight:600;
  padding:6px 10px;border-radius:9px;white-space:nowrap;box-shadow:var(--shadow-soft);
  font-variant-numeric:tabular-nums;
}
.tooltip::after{
  content:"";position:absolute;left:50%;top:100%;transform:translateX(-50%);
  border:5px solid transparent;border-top-color:var(--ink);
}
.calc-note{margin:22px 0 0;font-size:.82rem;color:var(--muted)}

/* ---------- get started ---------- */
.get-wrap{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(28px,5vw,64px);align-items:center}
.gs-visual{display:grid;place-items:center}
.phone-frame{
  position:relative;width:min(280px,72vw);aspect-ratio:480/1041;
  border:10px solid #17181c;border-radius:46px;background:#17181c;
  box-shadow:0 30px 60px -30px rgb(15 23 42 / .55);overflow:hidden;
}
.phone-notch{
  position:absolute;top:8px;left:50%;transform:translateX(-50%);z-index:2;
  width:34%;height:22px;border-radius:999px;background:#17181c;
}
.phone-shot{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:36px;
  opacity:0;transform:scale(1.02);transition:opacity .45s ease,transform .45s ease;
}
.phone-shot.is-active{opacity:1;transform:none}

.gs-steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:12px}
.step{
  background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius);
  overflow:hidden;transition:border-color .25s,box-shadow .25s;
}
.step:hover{border-color:#c6d7ec}
.step.is-open{border-color:var(--blue);box-shadow:var(--shadow-soft)}
.step-head{
  width:100%;font:inherit;text-align:left;cursor:pointer;background:none;border:0;color:inherit;
  display:grid;grid-template-columns:auto 1fr auto;align-items:start;gap:16px;padding:18px 20px;
}
.step-badge{
  width:40px;height:40px;border-radius:13px;display:grid;place-items:center;
  background:var(--sky);color:var(--blue-deep);font-weight:800;font-size:1.05rem;
  transition:background .25s,color .25s;
}
.step.is-open .step-badge{background:var(--blue);color:#fff}
.step-text{min-width:0}
.step-title{display:block;font-size:1.05rem;font-weight:700;letter-spacing:-.01em}
.step-blurb{display:block;margin-top:4px;color:var(--muted);font-size:.92rem}
.step .chev{width:20px;height:20px;margin-top:10px;flex:none;color:var(--blue);transition:transform .25s}
.step.is-open .chev{transform:rotate(180deg)}
.step-more{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s ease}
.step.is-open .step-more{grid-template-rows:1fr}
.step-more-inner{overflow:hidden}
.step-more p{margin:0 20px 16px 76px;color:var(--muted);font-size:.94rem}
.step-tip{
  font-size:.86rem !important;color:var(--blue-deep) !important;
  border-left:2px solid var(--sky-2);padding-left:12px;
}
.step-tip a{color:inherit}

/* ---------- science ---------- */
.science{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:clamp(28px,5vw,56px);align-items:start}
.paper{
  display:block;margin-top:26px;text-decoration:none;
  border:1px solid var(--hairline);border-left:4px solid var(--blue);
  border-radius:var(--radius);padding:20px 22px;background:var(--sky);transition:.2s;
}
.paper:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
.paper-kicker{display:block;font-size:.74rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--blue)}
.paper-title{display:block;margin:8px 0;font-size:1.05rem;font-weight:700;letter-spacing:-.01em}
.paper-doi{display:block;font-size:.84rem;color:var(--muted);word-break:break-word}
.facts{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px}
.facts li{border-top:1px solid var(--hairline);padding-top:14px}
.facts strong{display:block;font-size:1.7rem;font-weight:800;letter-spacing:-.02em;color:var(--blue-deep)}
.facts span{color:var(--muted);font-size:.92rem}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin-inline:auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius);overflow:hidden}
.faq-q{
  width:100%;font:inherit;font-size:1.02rem;font-weight:600;text-align:left;cursor:pointer;
  background:none;border:0;padding:20px 22px;display:flex;align-items:center;gap:16px;color:inherit;
}
.faq-q span{flex:1}
.chev{width:20px;height:20px;flex:none;color:var(--blue);transition:transform .25s}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a p{overflow:hidden;margin:0;padding:0 22px;color:var(--muted);transition:padding .3s ease}
.faq-item.open .faq-a p{padding-bottom:22px}

/* ---------- download / contact / footer ---------- */
.download{text-align:center;max-width:640px;margin-inline:auto}
.download .store-link{margin-top:28px}
.contact{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(24px,4vw,48px);align-items:center}
.contact-card{
  display:flex;align-items:center;gap:16px;text-decoration:none;
  background:var(--surface);border:1px solid var(--hairline);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow-soft);transition:.2s;
}
.contact-card:hover{transform:translateY(-2px);border-color:var(--blue)}
.mail-ico{width:48px;height:48px;flex:none;border-radius:14px;background:var(--sky);color:var(--blue);display:grid;place-items:center}
.mail-ico svg{width:24px;height:24px}
.contact-label{display:block;font-size:.74rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.contact-mail{display:block;font-weight:700;letter-spacing:-.01em}
.footer{border-top:1px solid var(--hairline);padding:26px 0}
.footer-inner{display:flex;align-items:center;gap:10px;font-size:.9rem}
.footer-name{font-weight:700}
.footer-copy{margin-left:auto;color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .calc-grid{grid-template-columns:1fr}
  .get-wrap,.science,.contact{grid-template-columns:1fr}
  .phone-frame{width:min(240px,62vw)}
}
@media (max-width:900px){
  .nav-desktop{display:none}
  .burger{display:grid}
}
@media (max-width:640px){
  .brand-name{display:none}
}

@media (max-width:560px){
  .hero{--phone-w:96vw}
  .step-head{grid-template-columns:auto 1fr;gap:12px;padding:16px}
  .step .chev{display:none}
  .step-more p{margin-left:16px;margin-right:16px}
  .footer-inner{flex-wrap:wrap}
  .footer-copy{margin-left:0;width:100%}
}