:root{
  /* Branding (customizable) */
  --qv-primary:#1E3A5F;
  --qv-secondary:#00A8E8;
  --qv-bg:#F8F9FA;
  --qv-text:#1A202C;
  --qv-muted:#4A5568;

  --qv-hero-gradient:linear-gradient(135deg,#1E3A5F 0%,#2C5282 100%);

  --qv-radius:16px;
  --qv-radius-sm:12px;

  --qv-shadow-sm:0 8px 20px rgba(15, 23, 42, .10);
  --qv-shadow-md:0 14px 36px rgba(15, 23, 42, .14);

  --qv-focus:0 0 0 .25rem rgba(0,168,232,.35);
}

html{ scroll-behavior:smooth; }

body{
  font-family:Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--qv-text);
  background:var(--qv-bg);
  text-rendering:optimizeLegibility;
}

h1,h2,h3,.brand-text{
  font-family:Montserrat,Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  letter-spacing:-0.02em;
}

/* Accessibility */
.skip-link{
  position:absolute;
  top:0;
  left:0;
  transform:translateY(-120%);
  background:#fff;
  color:var(--qv-text);
  padding:.75rem 1rem;
  border-radius:0 0 .75rem 0;
  z-index:1100;
  box-shadow:var(--qv-shadow-sm);
}
.skip-link:focus{ transform:translateY(0); outline:none; box-shadow:var(--qv-focus); }

:focus-visible{ outline:none; box-shadow:var(--qv-focus); border-radius:.5rem; }

/* Navbar */
.bg-primary-quantav{ background:var(--qv-primary); }
.navbar .nav-link{ color:rgba(255,255,255,.85); }
.navbar .nav-link:hover, .navbar .nav-link:focus{ color:#fff; }

.brand-mark{
  width:28px; height:28px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--qv-secondary),#6ee7ff);
  box-shadow:0 8px 18px rgba(0,168,232,.25);
}
.brand-text{ font-weight:700; }

.btn-accent{
  --bs-btn-color:#072438;
  --bs-btn-bg:var(--qv-secondary);
  --bs-btn-border-color:var(--qv-secondary);
  --bs-btn-hover-bg:#00b7ff;
  --bs-btn-hover-border-color:#00b7ff;
  --bs-btn-active-bg:#0099d1;
  --bs-btn-active-border-color:#0099d1;
  --bs-btn-focus-shadow-rgb:0,168,232;
  font-weight:600;
}

/* Sections */
.section{
  padding:5rem 0;
  background:transparent;
}
.section-heading{ max-width:820px; margin-bottom:2rem; }
.section-title{ font-size:clamp(1.6rem, 1.2rem + 1vw, 2.2rem); margin-bottom:.75rem; }
.section-lead{ color:var(--qv-muted); margin-bottom:0; }

/* Hero */
.hero{
  padding:6rem 0 4.5rem;
  color:#fff;
  background:var(--qv-hero-gradient);
}
.hero-eyebrow{
  display:inline-flex;
  padding:.35rem .75rem;
  border-radius:999px;
  background:rgba(255,255,255,.12);
  border:1px solid rgba(255,255,255,.18);
  font-weight:500;
  margin-bottom:1rem;
}
.hero-title{ font-size:clamp(2.1rem, 1.4rem + 2vw, 3.1rem); margin:0 0 1rem; }
.hero-subtitle{ color:rgba(255,255,255,.86); font-size:1.075rem; max-width:54ch; }
.hero-note{ color:rgba(255,255,255,.82); margin:.75rem 0 0; max-width:62ch; }
.hero-trust{ display:flex; flex-wrap:wrap; gap:.75rem 1rem; color:rgba(255,255,255,.9); }
.trust-item{ display:flex; align-items:center; gap:.5rem; font-weight:500; }

.hero-visual{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--qv-radius);
  overflow:hidden;
  box-shadow:var(--qv-shadow-md);
  min-height:320px;
}
.hero-image{ display:block; width:100%; height:auto; }
.hero-visual-inner{ padding:1rem; }
.mock-header{
  height:44px;
  border-radius:12px;
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.16);
  margin-bottom:1rem;
}
.mock-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:1rem; }
.mock-card{
  height:110px;
  border-radius:14px;
  background:linear-gradient(135deg, rgba(0,168,232,.32), rgba(255,255,255,.12));
  border:1px solid rgba(255,255,255,.18);
}

/* Features */
.section-features{ background:#fff; }
.feature-card{
  height:100%;
  padding:1.25rem 1.25rem 1.1rem;
  border-radius:var(--qv-radius);
  background:#fff;
  border:1px solid rgba(15,23,42,.08);
  box-shadow:var(--qv-shadow-sm);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feature-card:hover, .feature-card:focus-within{
  transform:translateY(-4px);
  box-shadow:var(--qv-shadow-md);
  border-color:rgba(0,168,232,.35);
}
.feature-icon{
  width:44px; height:44px;
  border-radius:14px;
  display:grid; place-items:center;
  background:rgba(0,168,232,.10);
  color:var(--qv-secondary);
  margin-bottom:.9rem;
}
.feature-icon i{ font-size:1.25rem; }
.feature-title{ font-size:1.15rem; margin:0 0 .4rem; }
.feature-text{ margin:0; color:var(--qv-muted); }

/* Integrations */
.integration-tile{
  height:100%;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:.6rem;
  padding:1.15rem;
  border-radius:var(--qv-radius);
  background:#fff;
  border:1px solid rgba(15,23,42,.08);
  transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.integration-tile i{ font-size:1.5rem; color:var(--qv-primary); }
.integration-tile span{ font-weight:600; color:var(--qv-text); text-align:center; }
.integration-sub{ color:var(--qv-muted); font-size:.9rem; text-align:center; line-height:1.2; }
.integration-tile:hover, .integration-tile:focus-within{ transform:translateY(-3px); box-shadow:var(--qv-shadow-md); border-color:rgba(0,168,232,.35); }
.integration-badge{ background:rgba(0,168,232,.06); }

/* Trust (Security) */
.section-trust{
  color:#fff;
  background:linear-gradient(135deg, #12243e 0%, #1E3A5F 55%, #2C5282 100%);
}
.trust-list{ padding-left:0; margin:1.5rem 0 0; list-style:none; }
.trust-list-item{
  display:flex; align-items:flex-start; gap:.6rem;
  padding:.6rem 0;
  color:rgba(255,255,255,.92);
}
.trust-list-item i{ color:#9be9ff; margin-top:.1rem; }

.trust-panel{
  border-radius:var(--qv-radius);
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.08);
  box-shadow:var(--qv-shadow-md);
  overflow:hidden;
}
.trust-panel-row{ padding:1.1rem 1.25rem; border-bottom:1px solid rgba(255,255,255,.12); }
.trust-panel-row:last-child{ border-bottom:none; }
.trust-metric-label{ color:rgba(255,255,255,.65); font-weight:500; font-size:.95rem; }
.trust-metric-value{ font-weight:700; font-size:1.05rem; }

/* Accordion */
.accordion-button:focus{ box-shadow:var(--qv-focus); }
.spec-list{ margin:0 0 1rem; color:var(--qv-muted); }

/* Contact */
.section-contact{ background:#fff; }
.contact-card{
  border-radius:var(--qv-radius);
  border:1px solid rgba(15,23,42,.08);
  box-shadow:var(--qv-shadow-sm);
  padding:1.35rem;
  background:#fff;
}
.contact-alt{ display:grid; gap:.6rem; }
.contact-alt-item{ display:flex; gap:.6rem; align-items:center; color:var(--qv-muted); }
.contact-alt-item a{ color:var(--qv-text); text-decoration:none; }
.contact-alt-item a:hover{ text-decoration:underline; }
.form-note{ font-size:.95rem; }

/* Footer */
.footer{ padding:2.5rem 0; background:var(--qv-primary); color:rgba(255,255,255,.86); }
.footer-brand{ font-weight:700; color:#fff; }
.footer-tagline{ color:rgba(255,255,255,.75); font-size:.95rem; }
.footer-links{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:1rem;
  justify-content:flex-start;
  padding-left:0;
  margin:0;
}
.footer-links a{ color:rgba(255,255,255,.86); text-decoration:none; }
.footer-links a:hover, .footer-links a:focus{ color:#fff; text-decoration:underline; }
.footer-copy{ margin-top:1rem; color:rgba(255,255,255,.65); font-size:.95rem; }

/* Reveal animations (lightweight AOS alternative) */
.reveal{ opacity:0; transform:translateY(14px); transition:opacity .5s ease, transform .5s ease; }
.reveal.is-visible{ opacity:1; transform:translateY(0); }

/* Reduce motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  .reveal{ transition:none; transform:none; }
  .feature-card, .integration-tile{ transition:none; }
}

/* Small tweaks */
@media (max-width: 575.98px){
  .section{ padding:4rem 0; }
  .hero{ padding:5rem 0 4rem; }
}

@media (min-width: 768px){
  .footer-links{ justify-content:flex-end; }
}