:root {
  --bg: #0f1220;
  --card: #171a2b;
  --acc: #6ee7ff;
  --ok: #36d399;
  --err: #f87272;
  --muted: #a6adbb;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(80vw 80vh at 10% 10%, #13162a, #0f1220);
  color: white;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.card {
  width: min(720px, 95vw);
  background: var(--card);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
h1 {
  margin: 0 0 6px;
  font-size: 22px;
}
p {
  margin: 0 0 18px;
  color: var(--muted);
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 12px;
}
.input,
.dropzone,
button {
  appearance: none;
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.2);
  color: white;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 14px;
}
.dropzone {
  text-align: center;
  padding: 28px;
  border: 2px dashed rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition: border-color 0.2s, transform 0.08s ease-in-out;
}
.dropzone.dragover {
  border-color: var(--acc);
  transform: scale(1.01);
}
button {
  cursor: pointer;
  background: linear-gradient(90deg, #14b8a6, #06b6d4);
  border: none;
  font-weight: 600;
}
.muted {
  color: var(--muted);
  font-size: 12px;
  margin-top: 8px;
}
.msg {
  margin-top: 14px;
  font-weight: 600;
}
.ok {
  color: var(--ok);
}
.err {
  color: var(--err);
}
code,
pre {
  background: rgba(255, 255, 255, 0.06);
  padding: 10px 12px;
  border-radius: 12px;
  display: block;
  overflow: auto;
}
a {
  color: var(--acc);
  word-break: break-all;
}