/* styles.css - dark bluish, glassy, shiny text */
:root{
  --bg:#071028;
  --card:#0e1a34cc;
  --accent1:#3aa0ff;
  --accent2:#6fd3ff;
  --glass: rgba(255,255,255,0.04);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(56,104,190,0.12), transparent),
              radial-gradient(800px 400px at 90% 90%, rgba(40,60,120,0.12), transparent),
              var(--bg);
  color:#dbeeff;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:24px;
}
/* shiny heading */
.shiny {
  font-weight:700;
  background: linear-gradient(90deg,var(--accent1),var(--accent2),#9be7ff);
  -webkit-background-clip:text;
  background-clip:text;
  color: transparent;
  text-shadow: 0 1px 8px rgba(90,160,255,0.08);
  letter-spacing:0.6px;
}

/* container */
.container{max-width:1100px;margin:0 auto}
.header{
  display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;
}
.logo{
  display:flex;gap:12px;align-items:center;
}
.logo .mark{
  width:48px;height:48px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent1),var(--accent2));
  box-shadow:0 6px 22px rgba(60,140,255,0.18), inset 0 -6px 18px rgba(255,255,255,0.06);
  display:grid;place-items:center;font-weight:700;color:#02102a;
}
.nav a{color:#9fcfff;text-decoration:none;margin-left:14px;font-weight:600}
.cardgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}

/* card */
.card{
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius:14px;padding:16px;backdrop-filter: blur(6px);
  box-shadow: 0 6px 30px rgba(4,12,30,0.6), inset 0 1px 0 rgba(255,255,255,0.02);
  border:1px solid rgba(140,200,255,0.06);
}
.card h3{margin:0 0 8px 0;font-size:16px}
.card p{margin:0;font-size:13px;color:#9fc3ff}

/* button */
.btn{
  display:inline-block;padding:10px 14px;border-radius:10px;background:linear-gradient(90deg,var(--accent1),var(--accent2));
  color:#02102a;font-weight:700;text-decoration:none;margin-top:12px;
  box-shadow:0 8px 30px rgba(50,140,255,0.12);
}

/* calculator box */
.calc{margin-top:12px;padding:12px;border-radius:10px;background:var(--card);border:1px solid rgba(255,255,255,0.02)}
.row{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}
.input, .select{padding:8px;border-radius:8px;border:1px solid rgba(255,255,255,0.04);background:transparent;color:inherit;min-width:120px}
.result{margin-top:10px;padding:10px;border-radius:8px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));font-weight:700}

/* footer */
.footer{opacity:0.7;font-size:13px;margin-top:26px;text-align:center}

/* small screens */
@media (max-width:520px){
  .row{flex-direction:column}
}