:root {
  --bg: #f4f5f7; --card: #ffffff; --text: #111827; --muted: #6b7280; --border: #e5e7eb;
  --accent: #111827; --accent-text: #ffffff; --warn-bg: #fff7ed; --warn: #9a3412; --error: #b91c1c;
  --code-bg: #f9fafb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d12; --card: #151821; --text: #e5e7eb; --muted: #9ca3af; --border: #262a35;
    --accent: #e5e7eb; --accent-text: #0b0d12; --warn-bg: #2a1a0c; --warn: #fdba74; --error: #f87171;
    --code-bg: #0f1218;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh; display: flex; align-items: flex-start; justify-content: center;
  padding: 48px 16px;
}
.card {
  width: 100%; max-width: 640px; background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 28px; box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 15px; margin-bottom: 24px; color: var(--muted); }
.brand strong { color: var(--text); font-weight: 600; }
h1 { font-size: 22px; line-height: 1.3; margin: 0 0 12px; }
p { margin: 0 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
code { font: 13px ui-monospace, SFMono-Regular, Menlo, monospace; }
.field { margin: 18px 0; }
label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--code-bg); color: var(--text); font: inherit;
}
.hint { font-size: 13px; color: var(--muted); margin-top: 6px; }
button {
  font: inherit; font-weight: 600; padding: 10px 16px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.ghost { border-color: transparent; color: var(--muted); }
button:disabled { opacity: .6; cursor: progress; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.status { min-height: 1.5em; color: var(--muted); font-size: 14px; margin-top: 12px; }
.status.error { color: var(--error); }
.warn { background: var(--warn-bg); color: var(--warn); padding: 10px 12px; border-radius: 8px; font-size: 14px; }
.file { font-size: 14px; margin-bottom: 8px; word-break: break-all; }
.file .label { color: var(--muted); }
pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 14px;
  max-height: 420px; overflow: auto; white-space: pre-wrap; word-break: break-all;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; margin: 0;
}
pre.masked { filter: blur(6px); user-select: none; }
footer { margin-top: 28px; padding-top: 16px; border-top: 1px solid var(--border); }