:root {
  --bg: #f5f6f8; --card: #ffffff; --text: #1b1f27; --muted: #5d6675; --line: #d9dde4;
  --accent: #2b59c3; --accent-text: #ffffff; --danger: #b3261e; --ok: #1d7a3a; --chip: #eaeef6;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14171c; --card: #1d2128; --text: #e7eaf0; --muted: #98a2b3; --line: #2e343f;
    --accent: #6c93f0; --accent-text: #0c1220; --danger: #ff8a80; --ok: #67d68b; --chip: #272d38;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 960px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 1.6rem; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 28px 0 10px; }
.muted { color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px; margin: 14px 0; }
.narrow { max-width: 420px; margin: 8vh auto 0; }
label { display: block; font-weight: 600; margin: 12px 0 4px; font-size: .9rem; }
input, select { width: 100%; padding: 10px 12px; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
input:focus, select:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button { font: inherit; cursor: pointer; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.danger { color: var(--danger); }
button.small { padding: 4px 10px; font-size: .85rem; }
button:disabled { opacity: .5; cursor: default; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 14px; }
.msg { margin-top: 12px; min-height: 1.2em; font-size: .92rem; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--ok); }
.msg ul { margin: 4px 0 0 18px; padding: 0; }
.tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.tool { border: 1px solid var(--line); border-radius: 10px; padding: 14px; background: var(--card); }
.tool.off { opacity: .55; }
.chip { display: inline-block; background: var(--chip); border-radius: 999px; padding: 1px 10px;
  font-size: .8rem; margin: 2px 4px 2px 0; }
nav { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 8px; }
nav a { color: var(--accent); margin-right: 14px; text-decoration: none; font-weight: 600; }
.tablewrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; white-space: nowrap; }
.link { word-break: break-all; font-family: ui-monospace, Consolas, monospace; font-size: .85rem;
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px; margin-top: 8px; }
.sims { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.sims label, .check { display: flex; gap: 6px; align-items: center; font-weight: 400; margin: 0; }
.sims input, .check input { width: auto; }
.qr { width: 200px; height: 200px; background: #fff; border-radius: 8px; padding: 6px; }
.codes { font-family: ui-monospace, Consolas, monospace; columns: 2; background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 14px; }