:root {
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #e3e5ea;
  --text: #1c2024;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-ink: #ffffff;
  --ok: #15803d;
  --err: #b91c1c;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #181b21;
    --border: #2a2f39;
    --text: #e6e8eb;
    --muted: #9aa3af;
    --primary: #3b82f6;
    --code-bg: #0b0e14;
    --code-ink: #cbd5e1;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; letter-spacing: .3px; }
.spacer { flex: 1; }
.link { color: var(--primary); text-decoration: none; font-weight: 500; }
.link:hover { text-decoration: underline; }

.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }
.container.narrow { max-width: 560px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.cardhead { display: flex; align-items: center; justify-content: space-between; }
h1 { font-size: 22px; margin: 0 0 6px; }
h2 { font-size: 17px; margin: 0 0 6px; }
.muted { color: var(--muted); margin: 0 0 14px; font-size: 14px; }
.who { margin-bottom: 16px; color: var(--muted); }

.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }

.stack { display: flex; flex-direction: column; gap: 12px; }
label { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--muted); font-weight: 500; }
label.checkbox { flex-direction: row; align-items: center; gap: 8px; }
input[type=text], input:not([type]), input[type=password], input[type=file] {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}
input:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14px; font-weight: 600;
  cursor: pointer;
}
.btn.primary { background: var(--primary); color: var(--primary-ink); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.primary:disabled { opacity: .5; cursor: not-allowed; }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn.ghost:hover { background: var(--bg); }
.btn.danger { background: transparent; border-color: var(--err); color: var(--err); }

.error { color: var(--err); font-size: 13px; min-height: 1em; }
.msg { font-size: 13px; min-height: 1em; }
.msg.ok { color: var(--ok); }
.msg.err { color: var(--err); }

.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.tbl th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .4px; }
.badge { font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--bg); border: 1px solid var(--border); }
.badge.off { color: var(--err); border-color: var(--err); }
.badge.on { color: var(--ok); border-color: var(--ok); }

.keyout { margin-top: 14px; }
.copyrow { display: flex; gap: 8px; align-items: stretch; }
code {
  display: block; flex: 1;
  background: var(--code-bg); color: var(--code-ink);
  padding: 10px 12px; border-radius: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px; word-break: break-all;
}

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px 16px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone.drag { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 8%, transparent); }
.dropzone.has-file { border-color: var(--ok); color: var(--text); }

progress { width: 100%; height: 10px; }
.hidden { display: none !important; }