:root{
  /* slightly lighter background tones */
  --bg1:#142739; /* slightly lighter deep navy */
  --bg2:#063656; /* slightly lighter dark blue */
  --card:#0b3b5c; /* teal-blue (unchanged) */
  --accent:#28a3ff; /* bright blue (unchanged) */
  --muted:#9fb8d9;
  --glass: rgba(255,255,255,0.05);
}

*{box-sizing:border-box}
html,body{height:100%;margin:0;font-family:Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial}
body{
  background: linear-gradient(135deg, var(--bg1) 0%, #073a54 40%, var(--bg2) 100%);
  color: #e9f6ff;
  -webkit-font-smoothing:antialiased;
  position:relative;
}

/* decorative background image layer (70% opacity) */
body::before{
  content: "";
  position:fixed;
  inset:0;
  background-image: url('fon.png');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  pointer-events: none;
  z-index: 0;
}

/* ensure page content is above the decorative background */
.container, .site-header, .site-footer, .grid{position:relative;z-index:1}
.container{max-width:1100px;margin:0 auto;padding:32px}
.site-header{padding:48px 0;text-align:left}
.site-header h1{margin:0;font-size:2.2rem;letter-spacing:0.04em;color:var(--accent)}
.subtitle{margin:8px 0 0;color:var(--muted);text-align:left}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:28px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:14px;padding:22px;backdrop-filter: blur(4px);box-shadow:0 6px 20px rgba(2,6,23,0.6);border:1px solid rgba(255,255,255,0.04);min-height:220px;display:flex;flex-direction:column;align-items:flex-start;justify-content:space-between}
.card .icon{width:48px;height:48px;margin-bottom:12px;color:var(--accent)}

/* Card hover animation and scroll-controlled transform using CSS variables */
.card{transition:transform 280ms cubic-bezier(.2,.9,.3,1), box-shadow 280ms;transform-origin:center;will-change:transform;--ty:0px;--scale:1;transform:translateY(var(--ty)) scale(var(--scale))}
.card:hover{--ty:-8px;--scale:1.03;box-shadow:0 12px 30px rgba(2,6,23,0.72)}

/* base image style */
.img-icon{width:48px;height:48px;margin-bottom:12px;object-fit:contain;display:block;transition:transform 220ms cubic-bezier(.2,.9,.3,1), opacity 220ms}
.card:hover .img-icon{transform:scale(1.05)}

.card{position:relative;overflow:visible}

/* price badge - hidden by default, appears on hover */
.card .price{position:absolute;left:82px;top:22px;background:linear-gradient(90deg, rgba(40,163,255,0.12), rgba(40,163,255,0.06));color:var(--accent);padding:6px 10px;border-radius:10px;font-weight:700;font-size:0.95rem;border:1px solid rgba(40,163,255,0.12);opacity:0;transform:translateX(8px);transition:opacity 200ms ease, transform 200ms ease}
.card:hover .price{opacity:1;transform:translateX(0)}

/* Global scroll blur and subtle container motion */
.container, .site-header, .site-footer, .grid{transition:filter 240ms ease, transform 240ms ease;filter: blur(var(--global-blur, 0px))}

/* Experience section (reveal from bottom) */
.experience{padding:80px 0;display:flex;align-items:center;justify-content:center;position:relative;z-index:1;margin-top:48px}
.experience-inner{max-width:920px;margin:0 auto;text-align:center;padding:36px 28px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));border-radius:14px;border:1px solid rgba(255,255,255,0.04);box-shadow:0 8px 26px rgba(2,6,23,0.6);backdrop-filter: blur(6px);filter: blur(var(--global-blur, 0px));transition:filter 240ms ease, transform 240ms ease, box-shadow 240ms ease}
.exp-text{font-size:2.4rem;color:var(--muted);font-weight:800;opacity:0;transform:translateY(36px);transition:transform 640ms cubic-bezier(.2,.9,.3,1),opacity 640ms ease, color 360ms;letter-spacing:0.02em;text-shadow:0 6px 18px rgba(2,6,23,0.6)}
.experience-inner.visible .exp-text{opacity:1;transform:translateY(0);color:var(--accent)}

@media (max-width:520px){.exp-text{font-size:1.4rem;padding:0 8px}}

/* Outline for header title */
.site-header h1{display:inline-block;margin:0;padding:0;border-radius:0;background:transparent;box-shadow:none;color:var(--accent)}

/* Stronger border / subtle glow for price badges */
.card .price{border:1px solid rgba(40,163,255,0.28);box-shadow:0 6px 18px rgba(40,163,255,0.06);backdrop-filter: blur(6px)}

@media (max-width:520px){
  .card .price{left:auto;right:16px;top:auto;bottom:16px;transform:translateY(6px)}
  .card:hover .price{transform:translateY(0)}
}
/* Larger icon specifically for the optimization card (.icon.tune) */
.icon.tune .img-icon{width:48px;height:48px}
.card h3{margin:0 0 10px 0;color:#fff}
.card p{margin:0;color:var(--muted);font-size:0.95rem}
.site-footer{padding:28px 0;text-align:center;color:var(--muted)}

.card-link{display:block;text-decoration:none;color:inherit}
.card-link:focus{outline:2px solid rgba(40,163,255,0.18);outline-offset:4px;border-radius:12px}
.card-link .card{margin:0}

/* contact button used on inner pages */
.contact-btn{display:inline-block;margin-top:12px;padding:10px 14px;background:transparent;color:var(--accent);border:1px solid rgba(40,163,255,0.22);border-radius:10px;text-decoration:none;font-weight:700;transition:transform 160ms ease,box-shadow 160ms ease}
.contact-btn:hover{background:linear-gradient(90deg,var(--accent),#7fd1ff);color:#022233;transform:translateY(-3px);box-shadow:0 10px 24px rgba(40,163,255,0.08)}
.contact-btn:active{transform:translateY(-1px)}

/* small responsiveness */
@media (max-width:520px){.site-header{padding:28px 16px}.site-header h1{font-size:1.4rem}.container{padding:16px}}