:root{
  --bg:#f6f9fc; /* page background */
  --surface:#ffffff; /* card background */
  --muted:#61748a; /* secondary text */
  --text:#0f1724; /* main text */
  --accent:#2563eb; /* blue accent */
  --accent-2:#0ea5a9; /* teal accent (used sparingly) */
  --glass: rgba(15,23,36,0.03);
  --soft-shadow: 0 6px 18px rgba(16,24,40,0.06);
}

*{box-sizing:border-box}
.background-spot{position:absolute;inset:0;pointer-events:none;background:radial-gradient(600px 200px at 50% 8%, rgba(37,99,235,0.06), transparent 30%), radial-gradient(400px 120px at 20% 20%, rgba(14,165,169,0.03), transparent 25%)}
body{font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;margin:0;background:linear-gradient(180deg,var(--bg) 0%, #ffffff 100%);color:var(--text);min-height:100vh;display:flex;flex-direction:column;position:relative;overflow-x:hidden}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid rgba(15,23,36,0.06);background:transparent}
.brand{font-weight:700;font-size:18px}
.accent{color:var(--accent)}
.help{background:transparent;border:1px solid rgba(15,23,36,0.06);padding:8px 12px;border-radius:8px;color:var(--muted);cursor:pointer}
.buy{display:inline-block;background:transparent;border:1px solid rgba(15,23,36,0.06);padding:8px 12px;border-radius:8px;color:var(--muted);cursor:pointer;text-decoration:none}
.buy:hover{background:rgba(37,99,235,0.06);color:var(--accent)}
.container{width:100%;max-width:980px;margin:28px auto;padding:0 16px;display:grid;grid-template-columns:1fr 320px;gap:18px;position:relative}
.card{background:var(--surface);padding:18px;border-radius:12px;box-shadow:var(--soft-shadow);border:1px solid rgba(15,23,36,0.04)}
.card.small{align-self:start}
h1,h2,h3{margin:0 0 12px 0}
.lead{color:var(--muted);margin:0 0 14px}
.input-row{display:flex;gap:10px}
input[type="text"]{flex:1;padding:12px 14px;border-radius:10px;border:1px solid rgba(15,23,36,0.08);background:transparent;color:var(--text);outline:none}
button{background:var(--accent);border:none;color:#fff;padding:10px 14px;border-radius:10px;font-weight:600;cursor:pointer}
.status{margin-top:12px;color:var(--muted);min-height:20px}
.result{margin-top:12px}
.result a{display:inline-block;background:linear-gradient(90deg,var(--accent),var(--accent-2));padding:10px 14px;border-radius:8px;color:#fff;text-decoration:none}
.footer{text-align:center;color:var(--muted);padding:18px 10px;margin-top:auto}

/* modal */
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;background:rgba(15,23,36,0.06);z-index:40}
.modal[aria-hidden="false"]{display:flex}
.modal-content{background:var(--surface);padding:20px;border-radius:12px;max-width:720px;color:var(--text);position:relative;box-shadow:var(--soft-shadow);border:1px solid rgba(15,23,36,0.04)}
.modal-close{position:absolute;right:12px;top:8px;background:transparent;border:none;color:var(--muted);font-size:22px;cursor:pointer}

/* responsive */
@media (max-width:880px){.container{grid-template-columns:1fr;}.card.small{order:3}}

/* accessibility focus */
button:focus,input:focus{box-shadow:0 0 0 4px rgba(37,99,235,0.12);outline:none}

/* About & Features layout */
.about p{color:var(--muted);line-height:1.5}
.features h2{margin-bottom:12px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:10px}
.feature-card{display:flex;gap:12px;align-items:flex-start;padding:12px;border-radius:10px;border:1px solid rgba(15,23,36,0.04);background:linear-gradient(180deg, rgba(255,255,255,0.98), rgba(255,255,255,0.96))}
.feature-card .icon{width:44px;height:44px;flex:0 0 44px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--accent);background:rgba(37,99,235,0.06)}
.feature-card h3{margin:0;font-size:15px}
.feature-card p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.4}

@media (max-width:520px){
  .feature-card{padding:10px}
  .feature-card .icon{width:36px;height:36px;flex:0 0 36px}
}

/* Main download card emphasis */
/* Emphasize main card with spotlight and stronger accent */
.main-card{background:linear-gradient(180deg,#ffffff,#fbfdff);border-left:6px solid var(--accent);box-shadow:0 18px 40px rgba(37,99,235,0.08);padding:26px;transform:translateZ(0)}
.main-card h1{font-size:20px;color:var(--text);margin-bottom:6px}
.main-card .lead{color:var(--muted);margin-bottom:14px}
.main-card input[type="text"]{padding:14px 16px;font-size:15px;border:1px solid rgba(15,23,36,0.06);background:transparent;border-radius:10px}
.main-card button{padding:12px 18px;font-size:15px;border-radius:10px}
.main-card .status{min-height:26px}

/* Add a subtle spotlight behind the main card */
.container:before{content:"";position:absolute;left:50%;top:14px;transform:translateX(-50%);width:760px;height:260px;background:radial-gradient(closest-side, rgba(37,99,235,0.06), transparent 40%);filter:blur(28px);pointer-events:none;z-index:0}
.main-card{position:relative;z-index:2}

/* focus and hover subtle improvements */
.main-card input[type="text"]:focus{border-color:rgba(37,99,235,0.35);box-shadow:0 6px 18px rgba(37,99,235,0.06)}
.main-card button:hover{filter:brightness(0.98);transform:translateY(-1px)}
.main-card button:active{transform:translateY(0)}