:root{
  --bg-1:#0b1220;
  --bg-2:#0e172a;
  --bg-3:#111827;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --card:rgba(255,255,255,0.06);
  --card-border:rgba(255,255,255,0.12);
  --accent:#60a5fa;
  --success:#22c55e;
  --danger:#ef4444;
  --radius:18px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-lg:0 18px 40px rgba(0,0,0,.45);
}

/* Base */
*{box-sizing:border-box;}
html,body{height:100%;}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  margin:0;
  color:var(--text);
  background:
    radial-gradient(1200px 700px at 10% -10%, #1f3a8a22, transparent),
    radial-gradient(1000px 600px at 100% 0%, #22d3ee15, transparent),
    linear-gradient(135deg, var(--bg-1), var(--bg-2) 45%, var(--bg-3));
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:24px 16px;
}

/* Layout */
main{
  width:min(980px,100%);
  margin:auto;
  padding:28px;
  border-radius:var(--radius);
  background:var(--card);
  border:1px solid var(--card-border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

/* Headings */
h1,h2,h3{
  margin:0 0 10px;
  text-align:center;
}
h1{
  font-size:clamp(28px,4vw,40px);
  letter-spacing:.2px;
}
h2{
  font-size:clamp(20px,3vw,26px);
  color:var(--muted);
  font-weight:600;
}
h3{
  font-size:clamp(18px,2.5vw,22px);
  color:var(--muted);
}

/* Info / Error banners */
.info,.error{
  position:relative;
  padding:16px 16px 16px 18px;
  border-radius:14px;
  margin:18px 0;
  background: linear-gradient(180deg, rgba(255,255,255,.07), rgba(255,255,255,.03));
  border:1px solid var(--card-border);
  box-shadow: var(--shadow);
  font-size:14px;
  line-height:1.6;
}
.info::before,.error::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:6px;
  border-top-left-radius:14px;
  border-bottom-left-radius:14px;
}
.info{
  color:var(--text);
}
.info::before{
  background: linear-gradient(180deg, #38bdf8, #60a5fa);
}
.error{
  color:var(--text);
}
.error::before{
  background: linear-gradient(180deg, #fca5a5, #ef4444);
}

/* Form / options */
.os-form{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin-top:10px;
}
.os-form fieldset{
  border-radius:14px;
  border:1px solid var(--card-border);
  padding:12px 14px 10px;
  margin:0;
}
.os-form legend{
  padding:0 4px;
  font-size:13px;
  color:var(--muted);
}
.os-form label{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  margin-right:16px;
  margin-top:4px;
  cursor:pointer;
}
.os-form input[type="radio"]{
  accent-color:var(--accent);
}

/* Links */
a{
  color:var(--accent);
  text-decoration:none;
}
a:hover{
  text-decoration:underline;
}

/* Buttons */
.button{
  --btn-bg1: rgba(255,255,255,.08);
  --btn-bg2: rgba(255,255,255,.02);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 16px;
  border-radius:14px;
  border:1px solid var(--card-border);
  background: linear-gradient(180deg, var(--btn-bg1), var(--btn-bg2));
  color:var(--text);
  cursor:pointer;
  text-decoration:none;
  font-weight:600;
  font-size:16px;
  box-shadow:var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.button.primary{
  display:block;
  width:100%;
  text-align:center;
}
.button.windows{
  box-shadow:0 10px 30px rgba(59,130,246,.25);
}
.button:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(255,255,255,.2);
}
.button:active{
  transform:translateY(0);
}

/* Sections */
section{
  margin:18px 0;
}
.download-section{
  margin-top:26px;
}
ul{
  margin:8px 0 0 18px;
  padding:0;
}

/* Modal for SmartScreen help */
.mm-modal{
  position:fixed;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  z-index:9999;
  font-family:inherit;
}
.mm-modal.mm-open{
  display:flex;
}
.mm-modal-backdrop{
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at top, rgba(59,130,246,0.3), transparent),
    rgba(15,23,42,0.92);
  backdrop-filter:blur(10px);
}
.mm-modal-dialog{
  position:relative;
  max-width:880px;
  width:min(94%,880px);
  max-height:92vh;
  overflow-y:auto;
  background:linear-gradient(145deg, rgba(15,23,42,0.96), rgba(17,24,39,0.98));
  border-radius:20px;
  border:1px solid rgba(148,163,184,0.45);
  box-shadow:0 24px 80px rgba(0,0,0,0.75);
  padding:20px 20px 18px;
  color:var(--text);
}
.mm-modal-close{
  position:absolute;
  top:10px;
  right:12px;
  width:28px;
  height:28px;
  border-radius:999px;
  border:1px solid rgba(148,163,184,0.6);
  background:rgba(15,23,42,0.9);
  color:#e5e7eb;
  cursor:pointer;
  font-size:18px;
  line-height:1;
}
.mm-modal-close:hover{
  background:rgba(30,64,175,0.9);
}
.mm-modal-header{
  margin-bottom:12px;
}
.mm-modal-header h2{
  margin:4px 0 6px;
  font-size:clamp(18px,2.4vw,22px);
  text-align:left;
}
.mm-modal-eyebrow{
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:0.17em;
  color:#9ca3ff;
}
.mm-modal-subtitle{
  font-size:14px;
  color:var(--muted);
  margin:0;
}
.mm-modal-body{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.1fr);
  gap:18px;
  margin-top:14px;
}
.mm-video-wrapper{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  border:1px solid rgba(148,163,184,0.6);
  background:#020617;
  box-shadow:var(--shadow-lg);
}
.mm-video-wrapper video{
  display:block;
  width:100%;
  height:100%;
}
.mm-modal-text{
  font-size:14px;
  line-height:1.7;
  color:#e5e7ff;
}
.mm-modal-text ol{
  margin:6px 0 10px 18px;
  padding:0;
}
.mm-modal-text li + li{
  margin-top:2px;
}
.mm-proof-block{
  grid-column:1 / -1;
  margin-top:10px;
}
.mm-proof-title{
  font-size:14px;
  font-weight:600;
  margin:4px 0 2px;
}
.mm-proof-subtitle{
  font-size:13px;
  color:var(--muted);
  margin:0 0 10px;
}
.mm-proof-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:12px;
}
.mm-proof-item{
  margin:0;
  padding:10px;
  border-radius:14px;
  background:rgba(15,23,42,0.9);
  border:1px solid rgba(148,163,184,0.5);
}
.mm-proof-item img{
  display:block;
  width:100%;
  border-radius:10px;
}
.mm-proof-item figcaption{
  margin-top:6px;
  font-size:12px;
  color:var(--muted);
}
.mm-modal-footer{
  margin-top:14px;
  display:flex;
  justify-content:flex-end;
}

/* HR */
hr{
  border:0;
  height:1px;
  background:linear-gradient(90deg, transparent, rgba(255,255,255,.18), transparent);
  margin:20px 0;
}

/* Mobile tweaks */
@media (max-width:780px){
  .mm-modal-body{
    grid-template-columns:1fr;
  }
}
@media (max-width:520px){
  body{
    padding:18px 10px;
  }
  main{
    padding:22px;
  }
  .mm-modal-dialog{
    padding:16px 14px 14px;
  }
  .mm-modal-footer .button.primary{
    width:100%;
  }
}