:root{
  --font-sans:'Open Sans',system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;

  /* Brand accents (keep consistent across themes) */
  --primary:#19b6ff;
  --primary-2:#0aa3ea;

  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
  --radius-sm:12px;
  --container:1120px;

  --focus:0 0 0 3px rgba(25,182,255,.35);
}

/* AUTO theme follows OS preference */
html[data-theme="auto"]{
  color-scheme: light dark;
}

/* DARK theme tokens */
html[data-theme="dark"], html[data-theme="auto"]{
  --bg:#071524;
  --surface:#0b1b2b;
  --surface-2:#0f2438;
  --text:#eef6ff;
  --muted:#b9c7d6;
  --border:rgba(255,255,255,.12);
  --card:rgba(255,255,255,.06);
  --card-border:rgba(255,255,255,.10);
  --input-bg:rgba(0,0,0,.18);
  --input-border:rgba(255,255,255,.16);
  --soft:rgba(255,255,255,.06);
  --soft-border:rgba(255,255,255,.10);
  --toast-bg:rgba(0,0,0,.22);
  --success:#44d37f;
  --danger:#ff6b6b;
}

/* LIGHT theme tokens */
html[data-theme="light"]{
  color-scheme: light;
  --bg:#f6fbff;
  --surface:#ffffff;
  --surface-2:#f1f7ff;
  --text:#0b1b2b;
  --muted:#4a637a;
  --border:rgba(11,27,43,.12);
  --card:rgba(255,255,255,.92);
  --card-border:rgba(11,27,43,.10);
  --input-bg:#ffffff;
  --input-border:rgba(11,27,43,.18);
  --soft:rgba(11,27,43,.04);
  --soft-border:rgba(11,27,43,.10);
  --toast-bg:rgba(255,255,255,.85);
  --success:#1b9a57;
  --danger:#c73434;
}

@media (prefers-color-scheme: light){
  html[data-theme="auto"]{
    color-scheme: light;
    --bg:#f6fbff;
    --surface:#ffffff;
    --surface-2:#f1f7ff;
    --text:#0b1b2b;
    --muted:#4a637a;
    --border:rgba(11,27,43,.12);
    --card:rgba(255,255,255,.92);
    --card-border:rgba(11,27,43,.10);
    --input-bg:#ffffff;
    --input-border:rgba(11,27,43,.18);
    --soft:rgba(11,27,43,.04);
    --soft-border:rgba(11,27,43,.10);
    --toast-bg:rgba(255,255,255,.85);
    --success:#1b9a57;
    --danger:#c73434;
  }
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 20% -10%, rgba(25,182,255,.18), transparent 55%),
    radial-gradient(800px 500px at 90% 10%, rgba(10,163,234,.12), transparent 60%),
    var(--bg);
  line-height:1.5;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
p{margin:0 0 12px}
ul{margin:0;padding:0;list-style:none}
strong{font-weight:700}

.container{
  width:min(var(--container), calc(100% - 40px));
  margin-inline:auto;
}

.sr-only{
  position:absolute;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);
  white-space:nowrap;border:0;
}

.skip-link{
  position:absolute;
  left:-9999px;top:auto;
  width:1px;height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left:16px;top:16px;
  width:auto;height:auto;
  padding:10px 12px;
  border-radius:10px;
  background:var(--surface);
  color:var(--text);
  z-index:9999;
  border:1px solid var(--border);
}

/* Header */
.header{
  position:sticky;
  top:0;
  z-index:1000;
  background:color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter:blur(10px);
  border-bottom:1px solid color-mix(in srgb, var(--border) 60%, transparent);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:12px 0;
}
.logo img{width:140px;height:auto}

.header-actions{display:flex;align-items:center;gap:10px}

/* Theme toggle */
.theme-toggle{
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--soft);
  color:var(--text);
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.theme-toggle:focus-visible{outline:none;box-shadow:var(--focus)}
.theme-toggle i{font-size:16px}

.nav ul{display:flex;align-items:center;gap:18px}
.nav a{
  display:inline-flex;
  padding:10px 10px;
  border-radius:12px;
  color:var(--muted);
  font-weight:600;
}
.nav a:hover{color:var(--text);background:var(--soft)}
.nav .nav-cta{
  background:color-mix(in srgb, var(--primary) 18%, transparent);
  color:var(--text);
  border:1px solid color-mix(in srgb, var(--primary) 28%, transparent);
}
.nav .nav-cta:hover{background:color-mix(in srgb, var(--primary) 26%, transparent)}

.menu-toggle{
  display:none;
  border:0;
  background:transparent;
  width:44px;height:44px;
  border-radius:12px;
  cursor:pointer;
}
.menu-toggle:focus-visible{outline:none;box-shadow:var(--focus)}
.menu-toggle span{
  display:block;
  height:2px;
  background:var(--text);
  margin:7px 10px;
  border-radius:10px;
  transition:transform .2s ease, opacity .2s ease;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:14px;
  font-weight:700;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .12s ease, background .12s ease, border-color .12s ease;
  user-select:none;
}
.btn:focus-visible{outline:none;box-shadow:var(--focus)}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(180deg, var(--primary), var(--primary-2));
  color:#001018;
}
.btn-secondary{
  background:var(--soft);
  border-color:var(--border);
}
.btn-ghost{
  background:transparent;
  border-color:var(--border);
  color:var(--text);
}
.btn-outline{
  background:transparent;
  border-color:color-mix(in srgb, var(--primary) 35%, transparent);
  color:var(--text);
}
.btn-outline:hover{background:color-mix(in srgb, var(--primary) 12%, transparent)}

/* Sections */
.section{padding:72px 0}
.section-header{margin-bottom:26px}
.section-header.left{text-align:left}
.section-title{margin:0;font-size:clamp(24px, 3vw, 34px);letter-spacing:-.02em}
.section-lead{color:var(--muted);max-width:70ch}
.title-underline{
  width:72px;height:4px;
  margin:12px 0 14px;
  border-radius:999px;
  background:linear-gradient(90deg, var(--primary), transparent);
}

/* Hero */
.hero{padding:80px 0 56px}
.hero-grid{
  display:grid;
  grid-template-columns: 1.25fr .75fr;
  gap:24px;
  align-items:start;
}
.eyebrow{
  display:inline-flex;
  gap:10px;
  align-items:center;
  color:var(--muted);
  background:var(--soft);
  border:1px solid var(--soft-border);
  padding:8px 12px;
  border-radius:999px;
}
.hero-title{
  margin:14px 0 10px;
  font-size:clamp(34px, 4.5vw, 54px);
  line-height:1.05;
  letter-spacing:-.03em;
}
.hero-accent{color:var(--primary)}
.hero-subtitle{
  color:var(--muted);
  max-width:65ch;
  font-size:clamp(15px, 1.6vw, 18px);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.trust-pill{
  display:inline-flex;
  gap:10px;
  align-items:center;
  padding:10px 12px;
  border-radius:999px;
  background:var(--soft);
  border:1px solid var(--soft-border);
  color:var(--muted);
}
.trust-pill strong{color:var(--text)}

.hero-card{
  background:linear-gradient(180deg, color-mix(in srgb, var(--card) 80%, transparent), color-mix(in srgb, var(--card) 60%, transparent));
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:var(--shadow);
}
.hero-card-title{margin:0 0 6px;font-size:20px}
.hero-card-subtitle{color:var(--muted)}
.hero-bullets{margin:14px 0 14px;display:grid;gap:10px}
.hero-bullets li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
.hero-bullets i{color:var(--primary);margin-top:3px}
.mini-note{margin-top:12px;color:var(--muted);display:flex;gap:10px;align-items:center}

/* About */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:start}
.about-highlights{margin-top:18px;display:grid;gap:12px}
.highlight{
  display:flex;gap:12px;
  padding:12px 12px;
  border-radius:var(--radius-sm);
  background:var(--soft);
  border:1px solid var(--soft-border);
}
.highlight i{color:var(--primary);margin-top:2px;font-size:18px}
.highlight span{display:block;color:var(--muted);font-weight:600;margin-top:2px}

/* Slideshow */
.slideshow-frame{
  border-radius:var(--radius);
  overflow:hidden;
  border:1px solid var(--card-border);
  background:var(--soft);
  min-height:260px;
  position:relative;
}
.slide{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;
  opacity:0;
  transition:opacity .35s ease;
}
.slide.active{opacity:1;position:relative}
.slideshow-controls{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px}
.icon-btn{
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--soft);
  color:var(--text);
  cursor:pointer;
}
.icon-btn:focus-visible{outline:none;box-shadow:var(--focus)}
.dots{display:flex;gap:8px}
.dot{
  width:10px;height:10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:color-mix(in srgb, var(--text) 10%, transparent);
  cursor:pointer;
}
.dot.active{background:var(--primary);border-color:color-mix(in srgb, var(--primary) 55%, transparent)}

/* Services */
.services-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:16px}
.card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:18px;
  box-shadow:0 10px 24px rgba(0,0,0,.12);
  display:flex;
  flex-direction:column;
  gap:12px;
}
.card-title{margin:0;font-size:20px}
.card-subtitle{color:var(--muted);margin:0}
.list{display:grid;gap:10px}
.list li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
.list i{color:var(--primary);margin-top:3px}
.card .btn{margin-top:auto}

/* Testimonials */
.testimonials-grid{display:grid;grid-template-columns:repeat(3, 1fr);gap:16px}
.quote-card{
  margin:0;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:18px;
}
.quote-card blockquote{margin:0 0 14px;color:var(--text);font-weight:600;line-height:1.55}
.quote-card figcaption{display:flex;align-items:center;gap:12px;color:var(--muted)}
.avatar{
  width:42px;height:42px;
  border-radius:999px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:color-mix(in srgb, var(--primary) 18%, transparent);
  border:1px solid color-mix(in srgb, var(--primary) 25%, transparent);
  color:var(--text);
  font-weight:800;
}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px;align-items:start}
.contact-card,.social-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:18px;
}
.lead-form{margin-top:12px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}
label{font-weight:700}
input,textarea{
  width:100%;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--input-border);
  background:var(--input-bg);
  color:var(--text);
  font-family:var(--font-sans);
}
input:focus,textarea:focus{outline:none;box-shadow:var(--focus);border-color:color-mix(in srgb, var(--primary) 45%, transparent)}
.error{min-height:18px;margin:0;color:color-mix(in srgb, var(--danger) 85%, transparent);font-weight:700;font-size:12px}
.checkbox{display:flex;gap:10px;align-items:flex-start;color:var(--muted);margin:10px 0 6px}
.checkbox input{width:18px;height:18px;margin-top:2px}
.form-actions{display:flex;flex-direction:column;gap:10px;margin-top:10px}
.form-note{color:var(--muted);font-size:13px;margin:0}

/* Web response box */
.response-box{
  margin-top:12px;
  padding:12px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--soft);
  color:var(--muted);
  display:none;
}
.response-box.show{display:block}
.response-box.success{
  border-color:color-mix(in srgb, var(--success) 55%, transparent);
}
.response-box.error{
  border-color:color-mix(in srgb, var(--danger) 55%, transparent);
}
.response-box strong{color:var(--text)}

.toast{
  margin-top:10px;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:var(--toast-bg);
  color:var(--muted);
  display:none;
}
.toast.show{display:block}

.social-networks{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.social-networks a{
  display:inline-flex;
  padding:10px;
  border-radius:14px;
  border:1px solid var(--border);
  background:var(--soft);
}
.social-networks img{width:34px;height:34px}
.contact-mini{margin-top:18px}
.contact-mini h4{margin:0 0 10px}

/* Footer */
.footer-legal-security{
  padding:56px 0;
  background:color-mix(in srgb, var(--bg) 60%, #000 10%);
  border-top:1px solid var(--border);
}
.footer-legal-security h2{margin:0 0 16px}
.footer-legal-security-content{display:grid;grid-template-columns:repeat(3, 1fr);gap:14px}
.footer-legal-security-content h3{margin:0 0 8px}
.footer-legal-security-content p{color:var(--muted)}
.footer-legal-security a{color:var(--text);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{margin:20px 0 0;color:var(--muted)}

/* Responsive */
@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr}
  .testimonials-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}

  .nav{
    position:absolute;
    right:20px;left:20px;
    top:70px;
    background:color-mix(in srgb, var(--bg) 90%, transparent);
    border:1px solid var(--border);
    border-radius:16px;
    padding:10px;
    display:none;
  }
  .nav.open{display:block}
  .nav ul{flex-direction:column;align-items:stretch}
  .menu-toggle{display:inline-flex;align-items:center;justify-content:center}
}

/* Theme button as a nav item */
.nav-theme{
  display:flex;
  align-items:center;
}
.nav-theme .theme-toggle{
  width:44px;
  height:44px;
  padding:0;
}