.upload { max-width: 560px; margin: 0 auto; padding: calc(var(--nav-h) + 40px) 20px 60px; }
.upload h1 { font-size: 40px; letter-spacing: -0.02em; margin: 0 0 24px; }
.upload form { display: grid; gap: 16px; }
.drop { display: grid; place-items: center; gap: 6px; padding: 48px 20px; border: 1.5px dashed var(--border);
  border-radius: 18px; background: var(--panel); cursor: pointer; text-align: center; transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--blue); }
.drop.has-file { border-style: solid; }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.drop-main { font-size: 19px; font-weight: 600; }
.drop-sub { font-size: 13px; color: var(--muted); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row.three { grid-template-columns: 1fr 1fr 1fr; }
.field { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.field em { font-style: normal; color: var(--faint); }
.field input, .field select { font: inherit; font-size: 16px; color: var(--text); background: var(--card);
  border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.field input:focus, .field select:focus { outline: 2px solid var(--blue); outline-offset: 1px; }
.primary { font: inherit; font-size: 16px; font-weight: 500; line-height: 1.25; color: #fff; background: var(--blue); border: 0;
  border-radius: 980px; padding: 10px 22px; cursor: pointer; }
.primary:hover:not(:disabled) { background: var(--blue-hover); }
.primary:disabled { opacity: .4; cursor: default; }
.challenge { min-height: 65px; }
.error { color: var(--red); font-size: 14px; margin: 0; }
.note { color: var(--muted); font-size: 12px; margin: 0; }
@media (max-width: 480px) { .row, .row.three { grid-template-columns: 1fr; } .upload h1 { font-size: 32px; } }