/* ==========================================================================
   D&S COMPUTADORES — Design System
   Tokens: fondo carbón + acentos morado eléctrico / amarillo neón
   Signature: motivo de ecualizador / forma de onda de audio
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Space+Mono:wght@400;700&display=swap');

:root{
  /* Color — estrictos según brief */
  --bg: #0B0B0B;
  --bg-card: #1E1E1E;
  --bg-card-hover: #242438;
  --text: #FFFFFF;
  --text-secondary: #A0A0A0;
  --accent: #6C63FF;
  --accent-light: #8B84FF;
  --accent-dark: #4A42CC;
  --accent2: #FFD700;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --shadow-accent: rgba(108,99,255,0.35);

  /* Tipografía */
  --font-display: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Espaciado / layout */
  --container: 1200px;
  --radius-s: 8px;
  --radius-m: 16px;
  --radius-l: 28px;
  --nav-h: 76px;

  --ease: cubic-bezier(.16,1,.3,1);
}

*{ margin:0; padding:0; box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
img{ max-width:100%; display:block; }
button{ font-family:inherit; cursor:pointer; border:none; background:none; color:inherit; }

.container{ width:100%; max-width:var(--container); margin:0 auto; padding:0 24px; }

.eyebrow{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--accent2);
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:'';
  width:22px; height:2px;
  background:var(--accent2);
  display:inline-block;
}

h1,h2,h3,h4{ font-family:var(--font-display); font-weight:800; letter-spacing:-0.02em; line-height:1.08; }
h2{ font-size:clamp(28px,4vw,46px); }
h3{ font-size:clamp(20px,2.4vw,26px); }
p{ color:var(--text-secondary); }

.section{ padding:110px 0; position:relative; }
.section-head{ max-width:640px; margin-bottom:56px; }
.section-head p{ margin-top:14px; font-size:17px; }

/* ---------- Botones ---------- */
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:15px 30px;
  border-radius:100px;
  font-weight:700;
  font-size:15px;
  letter-spacing:.01em;
  overflow:hidden;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease), background .35s var(--ease), border-color .35s var(--ease);
  white-space:nowrap;
}
.btn:active{ transform:scale(.96); }
.btn-primary{ background:var(--accent); color:#fff; box-shadow:0 8px 24px -8px var(--shadow-accent); }
.btn-primary:hover{ background:var(--accent-light); transform:translateY(-3px); box-shadow:0 14px 30px -8px var(--shadow-accent); }
.btn-outline{ border:1.5px solid var(--border-strong); color:var(--text); }
.btn-outline:hover{ border-color:#fff; background:rgba(255,255,255,.06); transform:translateY(-3px); }
.btn-cta{
  background:var(--accent2); color:#0B0B0B; box-shadow:0 8px 24px -8px rgba(255,215,0,.35);
}
.btn-cta:hover{ transform:translateY(-3px); box-shadow:0 14px 30px -8px rgba(255,215,0,.45); }
.btn-block{ width:100%; }
.btn-sm{ padding:10px 20px; font-size:13px; }

.ripple{ position:absolute; border-radius:50%; background:rgba(255,255,255,.5); transform:scale(0); animation:ripple .6s linear; pointer-events:none; }
@keyframes ripple{ to{ transform:scale(3); opacity:0; } }

/* ---------- Navbar ---------- */
.navbar{
  position:fixed; top:0; left:0; right:0; z-index:1000;
  height:var(--nav-h);
  display:flex; align-items:center;
  background:rgba(11,11,11,.55);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:background .4s var(--ease), border-color .4s var(--ease);
}
.navbar.scrolled{ background:rgba(11,11,11,.86); border-bottom-color:var(--border); }
.nav-inner{ display:flex; align-items:center; justify-content:space-between; width:100%; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:900; font-size:22px; letter-spacing:-0.02em; }
.brand img{ height:34px; width:auto; }
.brand small{ display:block; font-family:var(--font-mono); font-size:9px; letter-spacing:.14em; color:var(--text-secondary); font-weight:400; text-transform:uppercase; }

.nav-links{ display:flex; align-items:center; gap:38px; }
.nav-links a{
  font-size:14.5px; font-weight:600; color:var(--text-secondary);
  position:relative; padding:6px 2px; transition:color .3s;
}
.nav-links a:hover, .nav-links a.active{ color:var(--text); }
.nav-links a.active::after{
  content:''; position:absolute; left:0; right:0; bottom:-2px; height:2px; background:var(--accent2); border-radius:2px;
}
.nav-actions{ display:flex; align-items:center; gap:18px; }

.nav-progress{ position:absolute; bottom:0; left:0; height:2px; background:linear-gradient(90deg,var(--accent),var(--accent2)); width:0%; transition:width .1s linear; }

.nav-toggle{ display:none; flex-direction:column; gap:5px; width:26px; }
.nav-toggle span{ height:2px; background:#fff; border-radius:2px; transition:.3s; }

@media (max-width: 860px){
  .nav-links{ position:fixed; top:var(--nav-h); left:0; right:0; background:#0d0d0f; flex-direction:column; align-items:flex-start; gap:0; padding:8px 24px 20px; border-bottom:1px solid var(--border); transform:translateY(-8px); opacity:0; pointer-events:none; transition:.3s var(--ease); }
  .nav-links.open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  .nav-links a{ width:100%; padding:14px 0; border-bottom:1px solid var(--border); }
  .nav-toggle{ display:flex; }
  .nav-actions .btn-cta{ padding:9px 14px; }
  .nav-actions .btn-cta span{ font-size:12.5px; }
}

@media (max-width:620px){
  .hero-bg video{ display:none; }
  .wizard-nav{ flex-wrap:wrap; gap:12px; }
  .wizard-nav .btn{ flex:1; min-width:120px; text-align:center; }
  .form-field input[type="date"]{ color-scheme:dark; }
}

/* ---------- Hero ---------- */
.hero{
  position:relative; min-height:100vh; display:flex; align-items:center;
  padding-top:var(--nav-h); overflow:hidden;
}
.hero-bg{ position:absolute; inset:0; z-index:0; }
.hero-bg video{ width:100%; height:100%; object-fit:cover; opacity:.34; }
.hero-bg::after{
  content:''; position:absolute; inset:0;
  background:
    radial-gradient(ellipse 60% 50% at 30% 20%, rgba(108,99,255,.28), transparent 60%),
    linear-gradient(180deg, rgba(11,11,11,.4) 0%, rgba(11,11,11,.75) 55%, var(--bg) 100%);
}
#particles{ position:absolute; inset:0; z-index:1; }
.hero-content{ position:relative; z-index:2; max-width:760px; }
.hero-content h1{
  font-size:clamp(38px,6.4vw,72px);
  margin-bottom:22px;
  min-height:1.1em;
}
.hero-content h1 .cursor{ display:inline-block; width:3px; background:var(--accent2); margin-left:4px; animation:blink 1s step-end infinite; }
@keyframes blink{ 50%{ opacity:0; } }

.hero-sub{ display:flex; align-items:center; gap:12px; font-size:clamp(17px,2.2vw,22px); color:var(--text-secondary); margin-bottom:38px; font-family:var(--font-mono); }
.hero-sub .morph{ color:var(--accent2); font-weight:700; position:relative; min-width:170px; }

.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:56px; }

.hero-eq{ display:flex; align-items:flex-end; gap:4px; height:34px; opacity:.85; }
.hero-eq span{ width:4px; background:linear-gradient(180deg,var(--accent2),var(--accent)); border-radius:2px; animation:eq 1.1s ease-in-out infinite; }
.hero-eq span:nth-child(1){ height:40%; animation-delay:-1.1s; }
.hero-eq span:nth-child(2){ height:70%; animation-delay:-0.9s; }
.hero-eq span:nth-child(3){ height:100%; animation-delay:-0.7s; }
.hero-eq span:nth-child(4){ height:55%; animation-delay:-0.5s; }
.hero-eq span:nth-child(5){ height:85%; animation-delay:-0.3s; }
.hero-eq span:nth-child(6){ height:35%; animation-delay:-0.15s; }
.hero-eq span:nth-child(7){ height:65%; animation-delay:0s; }
@keyframes eq{ 0%,100%{ transform:scaleY(.4); } 50%{ transform:scaleY(1); } }

.scroll-hint{ position:absolute; bottom:32px; left:24px; display:flex; align-items:center; gap:10px; font-family:var(--font-mono); font-size:11px; letter-spacing:.12em; color:var(--text-secondary); text-transform:uppercase; z-index:2; }
.scroll-hint .line{ width:1px; height:34px; background:linear-gradient(var(--accent2),transparent); animation:scrolldown 1.8s ease-in-out infinite; }
@keyframes scrolldown{ 0%{ transform:scaleY(0); transform-origin:top; } 50%{ transform:scaleY(1); transform-origin:top; } 51%{ transform-origin:bottom; } 100%{ transform:scaleY(0); transform-origin:bottom; } }

/* ---------- Divider de onda (signature) ---------- */
.wave-divider{ display:block; width:100%; height:48px; }
.wave-divider path{ stroke:var(--border-strong); fill:none; stroke-width:1.5; }

/* ---------- Marcas ---------- */
.brands{ padding:56px 0; border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.brands .eyebrow{ justify-content:center; width:100%; margin-bottom:28px; color:var(--text-secondary); }
.brands .eyebrow::before{ background:var(--text-secondary); }
.brand-row{ display:flex; align-items:center; justify-content:space-between; gap:40px; flex-wrap:wrap; filter:grayscale(1); opacity:.55; }
.brand-row span{ font-family:var(--font-display); font-weight:800; font-size:22px; letter-spacing:.02em; color:var(--text); }

/* ---------- Reveal ---------- */
.reveal{ opacity:0; transform:translateY(32px); transition:opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in{ opacity:1; transform:translateY(0); }
.reveal-stagger > *{ opacity:0; transform:translateY(28px); transition:opacity .7s var(--ease), transform .7s var(--ease); }
.reveal-stagger.in > *{ opacity:1; transform:translateY(0); }

/* ---------- Grid de productos ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:26px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }

.card-3d{ perspective:1000px; }
.product-card{
  background:linear-gradient(160deg,var(--bg-card),#161620);
  border:1px solid var(--border);
  border-radius:var(--radius-m);
  padding:22px;
  transition:transform .45s var(--ease), box-shadow .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
  will-change:transform;
  height:100%;
  display:flex; flex-direction:column;
}
.product-card:hover{
  border-color:var(--accent);
  background:linear-gradient(160deg,var(--bg-card-hover),#1a1a2e);
  box-shadow:0 26px 50px -18px rgba(0,0,0,.6), 0 0 0 1px rgba(108,99,255,.25);
}
.product-media{
  aspect-ratio:1/0.82; border-radius:var(--radius-s); background:radial-gradient(circle at 30% 20%,#26263a,#111116); margin-bottom:18px; position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center;
}
.product-media svg{ width:46%; opacity:.9; }
.product-media img{ width:100%; height:100%; object-fit:cover; display:block; }
.product-tag{ position:absolute; top:10px; left:10px; font-family:var(--font-mono); font-size:10px; letter-spacing:.08em; background:rgba(11,11,11,.7); border:1px solid var(--border-strong); padding:4px 9px; border-radius:100px; text-transform:uppercase; color:var(--accent2); }
.product-card h3{ margin-bottom:6px; }
.product-desc{ font-size:14px; margin-bottom:14px; flex:1; }
.stars{ color:var(--accent2); font-size:13px; letter-spacing:2px; margin-bottom:10px; }
.stars span.dim{ color:var(--border-strong); }
.price-row{ display:flex; align-items:baseline; justify-content:space-between; margin-bottom:16px; }
.price{ font-family:var(--font-mono); font-weight:700; font-size:19px; color:var(--text); }
.price small{ color:var(--text-secondary); font-weight:400; font-size:11px; }

/* ---------- Beneficios ---------- */
.benefits{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.benefit{ text-align:center; padding:44px 26px; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m); }
.benefit-icon{ width:52px; height:52px; margin:0 auto 20px; color:var(--accent2); }
.counter{ font-family:var(--font-mono); font-size:clamp(30px,4vw,42px); font-weight:700; color:var(--text); margin-bottom:8px; }
.benefit p{ font-size:14px; margin:0; }

/* ---------- CTA banda ---------- */
.cta-band{
  border-radius:var(--radius-l);
  padding:64px 48px;
  background:radial-gradient(120% 140% at 15% 10%, var(--accent-dark) 0%, #201c47 45%, var(--bg) 100%);
  text-align:center;
  position:relative;
  overflow:hidden;
  border:1px solid var(--border-strong);
}
.cta-band h2{ margin-bottom:14px; }
.cta-band p{ max-width:480px; margin:0 auto 32px; }
.cta-band .hero-eq{ position:absolute; right:48px; bottom:30px; opacity:.3; }

/* ---------- Footer ---------- */
footer{ border-top:1px solid var(--border); padding:64px 0 28px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; margin-bottom:48px; }
.footer-brand p{ margin-top:14px; font-size:14px; max-width:280px; }
.footer-col h4{ font-family:var(--font-mono); font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--text-secondary); margin-bottom:18px; font-weight:700; }
.footer-col a, .footer-col p{ display:block; font-size:14.5px; color:var(--text-secondary); margin-bottom:12px; transition:color .25s; }
.footer-col a:hover{ color:var(--accent2); }
.social-row{ display:flex; gap:12px; margin-top:16px; }
.social-row a{ width:38px; height:38px; border-radius:50%; border:1px solid var(--border-strong); display:flex; align-items:center; justify-content:center; }
.social-row a:hover{ background:var(--accent); border-color:var(--accent); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; padding-top:26px; border-top:1px solid var(--border); font-size:13px; color:var(--text-secondary); flex-wrap:wrap; gap:12px; }

.wa-float{
  position:fixed; bottom:26px; right:26px; z-index:900;
  width:58px; height:58px; border-radius:50%;
  background:var(--accent2); color:#0B0B0B;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 10px 30px -8px rgba(255,215,0,.5);
  animation:floatpulse 2.6s ease-in-out infinite;
}
@keyframes floatpulse{ 0%,100%{ transform:translateY(0); } 50%{ transform:translateY(-6px); } }

/* ---------- Página genérica header ---------- */
.page-hero{ padding:calc(var(--nav-h) + 70px) 0 60px; border-bottom:1px solid var(--border); position:relative; overflow:hidden; }
.page-hero::before{ content:''; position:absolute; top:-120px; right:-120px; width:420px; height:420px; background:radial-gradient(circle,rgba(108,99,255,.22),transparent 70%); }
.breadcrumb{ font-family:var(--font-mono); font-size:12px; color:var(--text-secondary); margin-bottom:18px; letter-spacing:.05em; }
.breadcrumb a:hover{ color:var(--accent2); }

/* ---------- Filtros catálogo ---------- */
.filters{ display:flex; gap:12px; flex-wrap:wrap; margin-bottom:44px; }
.filter-btn{ padding:10px 20px; border-radius:100px; border:1px solid var(--border-strong); font-size:13.5px; font-weight:600; color:var(--text-secondary); transition:.3s; }
.filter-btn:hover{ color:#fff; border-color:#fff; }
.filter-btn.active{ background:var(--accent); border-color:var(--accent); color:#fff; }

/* ---------- Nosotros ---------- */
.about-grid{ display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; }
.mv-cards{ display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-top:20px; }
.mv-card{ background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m); padding:28px; }
.mv-card h4{ font-family:var(--font-mono); color:var(--accent2); font-size:12px; letter-spacing:.1em; text-transform:uppercase; margin-bottom:10px; }

.rating-summary{ display:flex; align-items:center; gap:22px; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m); padding:26px 30px; margin-bottom:36px; }
.rating-summary .big{ font-family:var(--font-mono); font-size:48px; font-weight:700; }
.rating-summary .stars{ font-size:18px; margin:6px 0 4px; }

.review-card{ background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m); padding:26px; height:100%; }
.review-card.neg{ border-color:rgba(255,90,90,.35); }
.review-head{ display:flex; justify-content:space-between; align-items:flex-start; margin-bottom:12px; }
.review-name{ font-weight:700; font-size:15px; }
.review-card p{ font-size:14.5px; }

.map-wrap{ border-radius:var(--radius-m); overflow:hidden; border:1px solid var(--border); filter:grayscale(.3) contrast(1.1) invert(0.92) hue-rotate(180deg); }
.map-wrap iframe{ width:100%; height:380px; border:0; display:block; }

.hours-card{ background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-m); padding:28px; }
.hours-row{ display:flex; justify-content:space-between; padding:12px 0; border-bottom:1px solid var(--border); font-size:14.5px; }
.hours-row:last-child{ border-bottom:none; }
.hours-row span:last-child{ font-family:var(--font-mono); color:var(--text); }

/* ---------- Wizard cotizar ---------- */
.wizard-shell{ display:grid; grid-template-columns:280px 1fr; gap:0; background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius-l); overflow:hidden; min-height:560px; }
.wizard-side{ background:linear-gradient(165deg,#151520,#0e0e14); padding:40px 30px; border-right:1px solid var(--border); }
.wizard-steps{ display:flex; flex-direction:column; gap:6px; margin-top:30px; }
.wizard-step{ display:flex; align-items:center; gap:14px; padding:12px 10px; border-radius:10px; opacity:.4; transition:.35s; }
.wizard-step.active{ opacity:1; background:rgba(108,99,255,.12); }
.wizard-step.done{ opacity:.85; }
.wizard-step .num{ font-family:var(--font-mono); font-size:12px; width:26px; height:26px; border-radius:50%; border:1px solid var(--border-strong); display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.wizard-step.active .num{ background:var(--accent); border-color:var(--accent); }
.wizard-step.done .num{ background:var(--accent2); border-color:var(--accent2); color:#0B0B0B; }
.wizard-step .label{ font-size:13.5px; font-weight:600; }

.wizard-main{ padding:48px; display:flex; flex-direction:column; }
.wizard-panel{ display:none; flex:1; }
.wizard-panel.active{ display:block; animation:fadein .5s var(--ease); }
@keyframes fadein{ from{ opacity:0; transform:translateX(14px); } to{ opacity:1; transform:translateX(0); } }
.wizard-panel h3{ margin-bottom:8px; }
.wizard-panel > p{ margin-bottom:30px; }

.option-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(170px,1fr)); gap:14px; }
.option-card{ border:1.5px solid var(--border-strong); border-radius:var(--radius-s); padding:20px 16px; text-align:left; transition:.25s; background:rgba(255,255,255,.02); }
.option-card:hover{ border-color:var(--accent-light); }
.option-card.selected{ border-color:var(--accent); background:rgba(108,99,255,.14); box-shadow:0 0 0 1px var(--accent); }
.option-card .oc-title{ font-weight:700; font-size:14.5px; margin-bottom:4px; display:block; }
.option-card .oc-sub{ font-size:12px; color:var(--text-secondary); }

.form-row{ display:grid; grid-template-columns:1fr 1fr; gap:18px; margin-bottom:18px; }
.form-field{ display:flex; flex-direction:column; gap:8px; }
.form-field label{ font-size:13px; font-weight:600; color:var(--text-secondary); }
.form-field input, .form-field select{
  background:rgba(255,255,255,.03); border:1.5px solid var(--border-strong); border-radius:10px;
  padding:13px 14px; color:var(--text); font-family:inherit; font-size:14.5px; transition:.25s;
}
.form-field input:focus, .form-field select:focus{ outline:none; border-color:var(--accent); background:rgba(108,99,255,.06); }

.wizard-nav{ display:flex; justify-content:space-between; margin-top:36px; }

.summary-box{ background:rgba(255,255,255,.03); border:1px solid var(--border-strong); border-radius:var(--radius-m); padding:26px; margin-bottom:26px; }
.summary-row{ display:flex; justify-content:space-between; padding:11px 0; border-bottom:1px dashed var(--border); font-size:14px; }
.summary-row:last-child{ border-bottom:none; }
.summary-row span:first-child{ color:var(--text-secondary); }
.summary-row span:last-child{ font-weight:600; text-align:right; }

.progress-track{ height:4px; background:var(--border); border-radius:4px; margin-top:26px; overflow:hidden; }
.progress-fill{ height:100%; background:linear-gradient(90deg,var(--accent),var(--accent2)); border-radius:4px; transition:width .5s var(--ease); }

/* ---------- Cursor personalizado ---------- */
@media (hover:hover) and (pointer:fine){
  body.custom-cursor-on, body.custom-cursor-on a, body.custom-cursor-on button, body.custom-cursor-on .option-card{ cursor:none; }
  .cursor-dot, .cursor-ring{
    position:fixed; top:0; left:0; pointer-events:none; z-index:9999;
    border-radius:50%; transform:translate(-50%,-50%);
    will-change:transform;
  }
  .cursor-dot{ width:6px; height:6px; background:var(--accent2); transition:opacity .2s; }
  .cursor-ring{
    width:34px; height:34px; border:1.5px solid rgba(255,215,0,.55);
    transition:width .25s var(--ease), height .25s var(--ease), border-color .25s var(--ease), opacity .2s;
  }
  body.cursor-hover .cursor-ring{ width:54px; height:54px; border-color:var(--accent2); background:rgba(255,215,0,.08); }
  body.cursor-down .cursor-ring{ width:28px; height:28px; }
  .cursor-dot.hidden, .cursor-ring.hidden{ opacity:0; }
}

/* ---------- Botón volver arriba ---------- */
.back-to-top{
  position:fixed; right:24px; bottom:96px; z-index:60;
  width:46px; height:46px; border-radius:50%;
  background:var(--bg-card); border:1px solid var(--border-strong);
  color:var(--text); display:flex; align-items:center; justify-content:center;
  opacity:0; transform:translateY(14px); pointer-events:none;
  transition:opacity .3s var(--ease), transform .3s var(--ease), background .25s, border-color .25s;
}
.back-to-top.visible{ opacity:1; transform:translateY(0); pointer-events:auto; }
.back-to-top:hover{ background:var(--accent); border-color:var(--accent); }
.back-to-top svg{ width:18px; height:18px; }
@media (max-width:620px){ .back-to-top{ right:16px; bottom:84px; width:42px; height:42px; } }

/* ---------- Responsive ---------- */
@media (max-width: 980px){
  .grid-3{ grid-template-columns:repeat(2,1fr); }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .benefits{ grid-template-columns:1fr; }
  .about-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .wizard-shell{ grid-template-columns:1fr; }
  .wizard-side{ border-right:none; border-bottom:1px solid var(--border); }
}
@media (max-width: 620px){
  .grid-3, .grid-4{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:32px; }
  .form-row{ grid-template-columns:1fr; }
  .wizard-main{ padding:30px 22px; }
  .section{ padding:76px 0; }
  .brand-row{ justify-content:center; gap:26px; }
  .mv-cards{ grid-template-columns:1fr; }
}