:root { color-scheme: light dark; --fg: #16181d; --bg: #f6f7f9; --card: #fff; --muted: #5b6472;
  --accent: #2f5bd7; --danger: #b3261e; --ok: #1e7a4b; --line: #dfe3ea; }
@media (prefers-color-scheme: dark) { :root { --fg: #e7e9ee; --bg: #12141a; --card: #1b1e26; --muted: #9aa3b2;
  --accent: #7fa0ff; --danger: #ff8a80; --ok: #7ddba3; --line: #2a2f3a; } }
* { box-sizing: border-box; }
body { margin: 0; padding: 2rem 1rem; background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif; }
.card { max-width: 36rem; margin: 0 auto; padding: 2rem; background: var(--card);
  border-radius: 12px; box-shadow: 0 1px 3px rgba(0,0,0,.12); }
h1 { margin: 0 0 .75rem; font-size: 1.4rem; }
h2 { font-size: 1.05rem; margin: 1.5rem 0 .5rem; }
.lead { margin: 0 0 .5rem; }
.hint { color: var(--muted); font-size: .9rem; }
.error { color: var(--danger); }
.ok { color: var(--ok); }
label { display: block; margin: 1rem 0 .25rem; font-size: .9rem; color: var(--muted); }
textarea, input, select { width: 100%; padding: .6rem; font: inherit; color: var(--fg);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
textarea { min-height: 8rem; resize: vertical; }
button { margin-top: 1rem; padding: .7rem 1.2rem; font-size: 1rem; border: 0; border-radius: 8px;
  background: var(--accent); color: #fff; cursor: pointer; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--line); }
button[disabled] { opacity: .6; cursor: default; }
pre { padding: 1rem; background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  white-space: pre-wrap; word-break: break-all; user-select: all; }
.dropzone { margin-top: .25rem; padding: 1.25rem; border: 1px dashed var(--line); border-radius: 8px;
  text-align: center; color: var(--muted); font-size: .9rem; cursor: pointer; }
.dropzone.over { border-color: var(--accent); color: var(--accent); }
.dropzone input { display: none; }
.picked { margin-top: .5rem; font-size: .9rem; }
.picked div { display: flex; justify-content: space-between; gap: 1rem; padding: .2rem 0; }
.picked .state { color: var(--muted); }
.files { margin-top: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.files .row button { width: 100%; text-align: left; }
#progress { color: var(--muted); font-size: .9rem; margin-top: .5rem; }
.checkbox { display: flex; align-items: center; gap: .5rem; margin-top: 1rem; }
.checkbox input { width: auto; }
.nav { display: flex; gap: 1rem; margin-bottom: 1.5rem; font-size: .9rem; }
.nav a { color: var(--muted); }
.nav .lang { margin-left: auto; }
.row { display: flex; gap: .5rem; flex-wrap: wrap; }
.warn { margin-top: 1rem; padding: .75rem 1rem; border-left: 3px solid var(--danger);
  background: var(--bg); font-size: .9rem; }
.card.wide { max-width: 64rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .5rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; }
td:first-child { white-space: normal; min-width: 8rem; word-break: break-word; }
td.muted { color: var(--muted); }
td button { margin-top: 0; padding: .35rem .7rem; font-size: .85rem; }