:root{ --ah-blue:#00A0E2; --ah-navy:#0F2640; --white:#fff; }
*{ box-sizing:border-box; }
body{ margin:0; min-height:100vh; display:grid; place-items:center;
  background:var(--ah-blue); color:var(--ah-navy);
  font:16px/1.5 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif; padding:24px; }
.card{ background:var(--white); width:min(560px,100%); border-radius:20px;
  padding:32px; box-shadow:0 20px 60px rgba(15,38,64,.25); text-align:center; }
.logo{ width:64px; height:64px; object-fit:contain; }
h1{ font-size:1.5rem; margin:.6rem 0 .2rem; }
.sub{ color:#52606d; margin:0 0 1.5rem; }
.drop{ display:flex; flex-direction:column; gap:6px; align-items:center; justify-content:center;
  border:2px dashed var(--ah-blue); border-radius:16px; padding:40px 16px; cursor:pointer;
  transition:background .15s; }
.drop:hover,.drop.over{ background:rgba(0,160,226,.08); }
.drop-main{ font-weight:600; }
.drop-sub{ color:#7b8794; font-size:.85rem; }
.bar{ height:14px; background:#e6eef5; border-radius:999px; overflow:hidden; }
.bar-fill{ height:100%; width:0; background:var(--ah-blue); border-radius:999px;
  transition:width .4s ease; }
.stage{ font-weight:600; margin-top:14px; }
#preview{ width:100%; border-radius:12px; background:#000; margin-bottom:16px; }
.btn{ display:inline-block; background:var(--ah-blue); color:#fff; border:0; cursor:pointer;
  font-size:1rem; font-weight:600; padding:14px 22px; border-radius:999px; text-decoration:none;
  margin:4px; }
.btn.ghost{ background:transparent; color:var(--ah-blue); }
.err{ color:#c0392b; font-weight:600; }