/* Stili di index.html */
:root{
  --bg:#F3F5FA;
  --bg-elevated:#FFFFFF;
  --bg-sunken:#E7EBF4;
  --text:#161B24;
  --text-dim:#4C5568;
  --text-faint:#8891A4;
  --accent:#0658FE;
  --accent-ink:#FFFFFF;
  --accent-2:#009E93;
  --border:#DADFEC;
  --border-strong:#BEC7DB;
  --success-bg:#E3F5EE;
  --success-text:#0A7D5C;
  --danger-bg:#FCE9E9;
  --danger-text:#C22A2A;
  --shadow: 0 20px 50px -25px rgba(11,14,21,0.30);
  --radius: 20px;
  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --bg:#0B0E15;
    --bg-elevated:#141A26;
    --bg-sunken:#090B11;
    --text:#EDEFF5;
    --text-dim:#9CA4B8;
    --text-faint:#616A80;
    --accent:#3B7DFF;
    --accent-ink:#0B0E15;
    --accent-2:#2FDCC9;
    --border:#232A3B;
    --border-strong:#333C52;
    --success-bg:#0E2A22;
    --success-text:#4FE0BF;
    --danger-bg:#301620;
    --danger-text:#FF7B7B;
    --shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
  }
}
:root[data-theme="dark"]{
  --bg:#0B0E15;
  --bg-elevated:#141A26;
  --bg-sunken:#090B11;
  --text:#EDEFF5;
  --text-dim:#9CA4B8;
  --text-faint:#616A80;
  --accent:#3B7DFF;
  --accent-ink:#0B0E15;
  --accent-2:#2FDCC9;
  --border:#232A3B;
  --border-strong:#333C52;
  --success-bg:#0E2A22;
  --success-text:#4FE0BF;
  --danger-bg:#301620;
  --danger-text:#FF7B7B;
  --shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background: transparent; 
  color:var(--text); 
  font-family:var(--font-body); 
}

/* ============ VIDEO BACKGROUND ============ */
.bg-video-wrapper {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  z-index: -1; 
  pointer-events: none;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

#bg-video-layer {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.1; 
  transform: scale(1); 
  transform-origin: center center;
  will-change: opacity, transform; 
}

@media (max-width: 768px) {
  #bg-video-layer {
    width: 100% !important;
    height: auto !important;
    object-fit: contain !important;
  }
}

img,svg{max-width:100%;display:block;}
a{color:inherit;}
h1,h2,h3,h4{font-family:var(--font-display);text-transform:uppercase;letter-spacing:0.01em;text-wrap:balance;margin:0;}
.mono{font-family:var(--font-mono);}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}
section{padding:88px 0;}
@media (max-width:720px){ section{padding:56px 0;} }

/* language toggle */
body.lang-en .lang-it{display:none !important;}
body:not(.lang-en) .lang-en{display:none !important;}

/* ============ NAV ============ */
.nav{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.nav-inner{
  max-width:1180px;margin:0 auto;padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  transition: all 0.3s ease;
}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--font-display);font-size:20px;font-weight:600;letter-spacing:0.04em;text-transform:uppercase;}
.brand-mark {
  height: 55px;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
  transition: all 0.3s ease;
}
/* Di giorno mostra il logo scuro; in tema scuro del browser mostra la versione con la scritta bianca,
   più leggibile sopra la nav quando è quasi nera */
.brand-mark-dark { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .brand-mark-light { display: none; }
  :root:not([data-theme="light"]) .brand-mark-dark { display: block; }
}
:root[data-theme="dark"] .brand-mark-light { display: none; }
:root[data-theme="dark"] .brand-mark-dark { display: block; }

/* Stato scrolled per Desktop */
.nav.scrolled .nav-inner {
  padding: 8px 24px; 
}
.nav.scrolled .brand-mark {
  height: 48px; 
}

/* Override per Mobile */
@media (max-width: 768px) {
  .nav-inner {
    padding: 8px 14px !important;
    gap: 8px;
  }

  .brand-mark, 
  .nav.scrolled .brand-mark {
    height: 48px !important;
  }

  .nav.scrolled .nav-inner {
    padding: 4px 14px !important;
  }

  .nav .btn {
    padding: 7px 10px;
    font-size: 11.5px;
  }

  .lang-toggle button {
    padding: 4px 7px;
    font-size: 11px;
  }
}

.brand-word{line-height:1;}
.nav-actions{display:flex;align-items:center;gap:14px;}
.lang-toggle{
  display:flex;border:1px solid var(--border-strong);border-radius:999px;overflow:hidden;font-family:var(--font-mono);font-size:12px;
}
.lang-toggle button{
  background:none;border:none;color:var(--text-dim);padding:6px 12px;cursor:pointer;font-family:inherit;font-size:inherit;letter-spacing:0.05em;
}
.lang-toggle button[aria-pressed="true"]{background:var(--text);color:var(--bg);}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-body);font-weight:600;font-size:14px;
  padding:11px 20px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;text-decoration:none;white-space:nowrap;
  transition:transform .15s ease, opacity .15s ease;
}
.btn:active{transform:scale(0.97);}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{opacity:0.9;}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong);}
.btn-ghost:hover{border-color:var(--text);}
.btn-block{width:100%;justify-content:center;padding:14px 20px;font-size:15px;white-space:normal;text-align:center;line-height:1.3;}
.nav .btn{padding:9px 16px;font-size:13px;}

/* ============ HERO ============ */
.hero {
  padding-top: 88px;
  padding-bottom: 88px;
}
.hero-grid {
  display: flex;
  flex-direction: column;
  align-items: center; 
  gap: 44px;
}
.hero-grid > .hero-copy {
  width: 100%;
  max-width: 952px;
  margin: 0 auto;
  text-align: center;
} 
.hero-copy > .sub {
  max-width: 700px !important;
  margin-left: auto !important;
  margin-right: auto !important;
}
h1.headline {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.eyebrow{
  font-family:var(--font-mono);font-size:12px;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--accent);display:flex;align-items:center;gap:8px;margin-bottom:18px;
  justify-content: center;
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--accent);border-radius:50%;flex:none;}
h1.headline{font-size:clamp(38px,5.4vw,64px);line-height:1.02;font-weight:700;margin-bottom:20px;}
.headline .accent-word{color:var(--accent);}
.sub{font-size:18px;color:var(--text);max-width:46ch;margin-bottom:32px;}

/* ============ BEFORE / AFTER COMPARE ============ */
.compare-wrap{max-width:960px;margin:0 auto;}
.compare{
  position:relative;aspect-ratio:3/2;overflow:hidden;border-radius:var(--radius);
  border:1px solid var(--border);box-shadow:var(--shadow);background:var(--bg-elevated);
}
@media (max-width:600px){ .compare{aspect-ratio:4/5;} }
.compare-img{position:absolute;inset:0;background:var(--bg-sunken);}
.compare-after{clip-path:inset(0 0 0 50%);}
.compare-photo{width:100%;height:100%;object-fit:cover;display:block;}
.compare-label {
  position: absolute; top: 16px; z-index: 3; font-size: 11px; letter-spacing: 0.1em; color: #fff;
  background: rgba(10,12,18,0.55); backdrop-filter: blur(4px); padding: 5px 10px; border-radius: 999px;
  pointer-events: none;
  transition: opacity 0.15s ease;
}
.compare-label-left{left:16px;}
.compare-label-right{right:16px;}
.compare-divider{
  position:absolute;top:0;bottom:0;left:50%;width:2px;background:#fff;
  box-shadow:0 0 0 1px rgba(0,0,0,0.15), 0 0 12px rgba(0,0,0,0.25);
  transform:translateX(-1px);pointer-events:none;z-index:2;
}
.compare-handle{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:44px;height:44px;border-radius:50%;background:#fff;color:#14181F;
  display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,0,0,0.3);
}
.compare-range{
  position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize;
  -webkit-appearance:none;appearance:none;z-index:4;
}
.compare-range::-webkit-slider-thumb{-webkit-appearance:none;width:44px;height:100%;}
.compare-range::-moz-range-thumb{width:44px;height:100%;border:none;background:transparent;}

/* ============ SECTION HEADERS ============ */
.section-head{max-width:640px;margin-bottom:48px;}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:0.12em;text-transform:uppercase;color:var(--accent-2);margin-bottom:12px;}
h2.section-title{font-size:clamp(28px,3.6vw,40px);font-weight:600;margin-bottom:16px;}
.section-body{color:var(--text-dim);font-size:16px;max-width:60ch;}
.rule{height:1px;background:var(--border);border:none;margin:0;}

/* ============ STEPS & GALLERY ============ */
.steps-3 { 
  display: grid; 
  grid-template-columns: repeat(3, 1fr); 
  gap: 1px; 
  background: var(--border); 
  border: 1px solid var(--border); 
  border-radius: var(--radius); 
  overflow: hidden; 
  margin: auto; 
  width: 100%; 
  max-width: 1200px; 
}
.steps-header {
  grid-column: 1 / -1;
  background: var(--bg-elevated);
  padding: 32px 22px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  text-transform: none;
  color: var(--text);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
@media (max-width: 800px) { .steps-3 { grid-template-columns: 1fr; } }
.step { background: var(--bg-elevated); padding: 26px 22px; display: flex; flex-direction: column; }
.step-img { width: 100%; height: auto; border-radius: 12px; display: block; margin-bottom: 14px; object-fit: cover; }
.step-num { font-family: var(--font-mono); font-size: 13px; color: var(--accent); margin-bottom: 14px; }
.step h4 { font-size: 16px; font-family: var(--font-body); text-transform: none; font-weight: 600; margin-bottom: 8px; }
.step p { margin: 0; font-size: 14px; color: var(--text-dim); }

/* Grid per soluzione (perno e app) */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
@media (max-width: 768px) {
  .grid-2col {
    grid-template-columns: 1fr;
  }
}

.app-img { width: 100%; aspect-ratio: 9 / 16; height: auto; object-fit: cover; border-radius: calc(var(--radius) - 6px); margin-bottom: 20px; display: block; }
.render-content { margin-top: auto; }
.render-label { position: relative; font-size: 13px; font-weight: 600; }
.render-sub { position: relative; font-family: var(--font-mono); font-size: 11px; color: var(--text-faint); margin-top: 4px; }

/* ============ FORMS & SELECTORS ============ */
.panel{
  background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:32px;
  display:flex;flex-direction:column;
}
label{font-size:13px;font-weight:600;display:block;margin-bottom:6px;}
select, input[type="text"], input[type="email"], textarea{
  width:100%;background:var(--bg);border:1px solid var(--border-strong);border-radius:var(--radius);
  padding:12px 14px;color:var(--text);font-family:var(--font-body);font-size:15px;margin-bottom:16px;
}
select:focus, input:focus, textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent);}

/* Select Dropdown Arrow personalizzata */
select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%234C5568' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 24px center; 
  padding-right: 48px !important; 
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) select {
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%239CA4B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}
:root[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%239CA4B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

.model-other{display:none;}
.model-other.show{display:block;}

.price-card{
  background:var(--bg-sunken);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:22px;
  display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:10px;
}
.price-figure{font-family:var(--font-mono);font-size:34px;font-weight:600;color:var(--accent);}
.price-note{font-size:12.5px;color:var(--text-faint);max-width:22ch;}

.tier-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:8px;}
@media (max-width:560px){ .tier-grid{grid-template-columns:1fr;} }
.tier-card{
  position:relative;display:flex;flex-direction:column;gap:6px;margin:0;cursor:pointer;
  background:var(--bg-sunken);border:2px solid var(--border);border-radius:var(--radius);padding:18px;
  font-weight:400;transition:border-color .15s, background .15s;
}
.tier-card:has(input:checked){border-color:var(--accent);background:var(--bg-elevated);}
.tier-card:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px;}
.tier-card input{position:absolute;opacity:0;pointer-events:none;}
.tier-badge{position:absolute;top:-10px;right:14px;background:var(--accent);color:var(--accent-ink);font-size:10.5px;letter-spacing:.08em;padding:3px 8px;border-radius:999px;}
.tier-name{font-size:15px;font-weight:700;}
.tier-cost{font-size:26px;font-weight:600;color:var(--accent);}
.tier-price{font-size:13px;color:var(--text-dim);}
.tier-refund{font-size:12px;font-weight:600;color:var(--accent-2);margin-top:-4px;}
.tier-price s{color:var(--text-faint);}
.tier-listnote{font-size:11.5px;color:var(--text-faint);margin-top:-4px;}
.tier-list{margin:6px 0 0;padding-left:18px;font-size:13px;color:var(--text-dim);line-height:1.5;}
.tier-list li.no{color:var(--text-faint);}
.tier-vat{max-width:none;margin:0 0 24px;text-align:right;}
#signup-form.tier-priority .only-free, #signup-form.tier-free .only-priority{display:none;}

.cf-turnstile{margin:0 0 8px;min-height:65px;}
.track-only{margin:0 0 20px;padding:12px 14px;border-radius:var(--radius);border:1px solid var(--border-strong);
  background:var(--bg-sunken);font-size:13.5px;line-height:1.5;color:var(--text);text-align:center;}
.tier-seats{margin-top:8px;font-size:12.5px;font-weight:600;color:var(--accent);}
.tier-card.sold-out{opacity:.55;cursor:not-allowed;}
.tier-card.sold-out .tier-seats{color:var(--text-dim);}

.checkbox-row{display:flex;align-items:flex-start;gap:10px;margin-bottom:20px;font-size:14px;color:var(--text-dim);}
.checkbox-row input{width:auto;margin:3px 0 0 0;flex:none;}
.checkbox-row a{color:var(--accent);text-decoration:underline;}
.form-foot{font-size:12px;color:var(--text-faint);margin-top:14px;text-align:center;}
.form-hint{font-size:11.5px;line-height:1.45;color:var(--text-faint);margin:6px 0 14px;}
.foot-marks{margin-top:6px;max-width:70ch;font-family:var(--font-body);}
.form-result{margin-top:18px;padding:14px 16px;border-radius:var(--radius);font-size:14px;display:none;}
.form-result.show{display:block;}
.form-result.ok{background:var(--success-bg);color:var(--success-text);}
.form-result.err{background:var(--danger-bg);color:var(--danger-text);}

/* ============ FOOTER ============ */
footer{padding:48px 0 32px;}
.foot-grid{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;}
.foot-left{display:flex;align-items:center;gap:10px;font-family:var(--font-display);text-transform:uppercase;letter-spacing:0.04em;}
.foot-links{display:flex;gap:20px;font-size:13px;color:var(--text-dim);flex-wrap:wrap;align-items:center;}
.foot-links .ig-link{display:inline-flex;align-items:center;gap:5px;}
.foot-fine{margin-top:28px;font-size:12px;color:var(--text-faint);font-family:var(--font-mono);}

/* Badge "Patented technology" sopra il video della ruota */
.scrub-frame { overflow: hidden; border-radius: calc(var(--radius) - 6px); }
.patent-badge { position: absolute; top: 5%; left: 6%; z-index: 2; display: flex; align-items: center; gap: 10px; color: #fff; pointer-events: none; text-shadow: 0 1px 8px rgba(0,0,0,.55); }
.patent-badge svg { flex: none; filter: drop-shadow(0 1px 6px rgba(0,0,0,.5)); }
.patent-badge .pb-text { display: flex; flex-direction: column; line-height: 1.05; font-family: var(--font-body); text-transform: uppercase; letter-spacing: .04em; }
.patent-badge .pb-text b { font-size: 21px; font-weight: 800; }
.patent-badge .pb-text span { font-size: 17px; font-weight: 400; }
@media (max-width: 560px) {
  .patent-badge svg { width: 36px; height: 36px; }
  .patent-badge .pb-text b { font-size: 17px; }
  .patent-badge .pb-text span { font-size: 14px; }
}

/* Slider per scorrere a mano i fotogrammi del video della ruota */
.frame-slider { -webkit-appearance: none; appearance: none; display: block; width: 100%; height: 28px; margin: -6px 0 18px; background: transparent; cursor: pointer; touch-action: pan-y; }
.frame-slider[hidden] { display: none; }
/* Riga di raccordo per chi arriva dal calcolatore */
.tool-banner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 6px 14px; max-width: 760px; margin: 0 auto 22px; padding: 12px 18px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--bg-elevated); font-size: 14px; line-height: 1.5; text-align: center; }
.tool-banner[hidden] { display: none; }
.tool-banner b { font-weight: 700; }
.tool-banner .tb-link { font-weight: 700; color: var(--accent); white-space: nowrap; }
/* Etichetta "Prototipo" in basso a sinistra sulla foto della ruota */
.proto-tag { position: absolute; left: 12px; bottom: 12px; z-index: 2; padding: 6px 12px; border-radius: 999px; background: rgba(0,0,0,.6); color: #fff; font-family: var(--font-mono); font-size: 11px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; line-height: 1; pointer-events: none; }
.frame-slider::-webkit-slider-runnable-track { height: 6px; border-radius: 999px; background: var(--border-strong); }
.frame-slider::-moz-range-track { height: 6px; border-radius: 999px; background: var(--border-strong); }
.frame-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 24px; height: 24px; margin-top: -9px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg-elevated); box-shadow: 0 1px 6px rgba(0,0,0,.35); }
.frame-slider::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: var(--accent); border: 3px solid var(--bg-elevated); box-shadow: 0 1px 6px rgba(0,0,0,.35); }
.frame-slider:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 8px; }