:root {
  --bg: #f4f1ea;
  --card: #ffffff;
  --ink: #23201b;
  --muted: #7a736a;
  --accent: #c65f3b;
  --accent-dark: #a94b2b;
  --line: #e3ddd2;
  --ok: #2e7d4f;
  --warn: #b8860b;
  --err: #b3452c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
.wrap { max-width: 640px; margin: 0 auto; padding: 40px 20px 80px; }
h1 { font-family: Georgia, serif; font-size: 1.9rem; margin: 0 0 4px; }
.sub { color: var(--muted); margin: 0 0 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.hidden { display: none !important; }
label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 14px; }
input, select {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 1rem;
  background: #fbfaf7; font-weight: 400;
}
input[type="file"] { padding: 8px; background: #fbfaf7; }
.row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.file { border: 1px dashed var(--line); border-radius: 8px; padding: 12px; background: #fcfbf8; }
.req { color: var(--accent); font-size: .75rem; margin-left: 6px; }
.hint { color: var(--muted); font-size: .72rem; font-weight: 400; margin-left: 4px; }
.toprow { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.signedin { color: var(--ok); font-size: .82rem; font-weight: 600; }
.link { background: none; color: var(--muted); border: none; padding: 2px 6px; font-size: .82rem; font-weight: 600; text-decoration: underline; }
.link:hover { background: none; color: var(--accent); }
button, .btn {
  display: inline-block; cursor: pointer; border: none; border-radius: 8px;
  padding: 11px 20px; font-size: 1rem; font-weight: 600;
  background: var(--accent); color: #fff; text-decoration: none; text-align: center;
}
button:hover, .btn:hover { background: var(--accent-dark); }
button:disabled { opacity: .5; cursor: default; }
.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.ghost:hover { background: #f6e9e3; color: var(--accent-dark); }
.msg { margin: 12px 0 0; font-size: .9rem; min-height: 1.2em; }
.msg.err { color: var(--err); }
.stage { font-size: 1.05rem; font-weight: 600; margin: 8px 0; }
pre { background: #f7f4ee; padding: 12px; border-radius: 8px; overflow-x: auto; font-size: .82rem; }
.spinner {
  width: 34px; height: 34px; border: 4px solid var(--line);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 1s linear infinite; margin: 8px 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.downloads { display: flex; gap: 12px; margin: 18px 0; flex-wrap: wrap; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: .82rem; font-weight: 600; }
.badge.ok { background: #e3f2e9; color: var(--ok); }
.badge.err { background: #fbe6e0; color: var(--err); }
table { border-collapse: collapse; width: 100%; font-size: .85rem; margin: 10px 0; }
th, td { border: 1px solid var(--line); padding: 5px 8px; text-align: center; }
th { background: #f7f4ee; }
ul.issues { margin: 8px 0; padding-left: 20px; font-size: .88rem; }
ul.issues li { margin-bottom: 3px; }