:root {
  --bg: #f4f6f9; --card: #fff; --text: #1d2330; --muted: #667085; --line: #e3e7ee;
  --brand: #1f5fbf; --brand-text: #fff; --ok-bg: #e7f6ec; --ok: #1b7a3d;
  --err-bg: #fdecec; --err: #b42318; --warn: #b54708;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b; --card: #1b2029; --text: #e6e9ef; --muted: #98a2b3; --line: #2c3340;
    --brand: #4c8dff; --brand-text: #0b1220; --ok-bg: #14301f; --ok: #6fdc9a;
    --err-bg: #3a1716; --err: #ff8a80; --warn: #fdb022;
  }
}
* { 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; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px;
             min-height: 56px; flex-wrap: wrap; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; }
nav { display: flex; gap: 16px; align-items: center; }
nav a, .link { color: var(--brand); text-decoration: none; background: none; border: 0;
               font: inherit; cursor: pointer; padding: 0; }
main { padding-top: 20px; padding-bottom: 40px; }
h1 { font-size: 1.4rem; margin: 0 0 16px; }
h2 { font-size: 1.15rem; margin: 0 0 12px; }
h3 { font-size: 1rem; margin: 20px 0 8px; }
.hello { color: var(--muted); margin: 0 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px;
        padding: 20px; margin-bottom: 20px; }
.card.narrow { max-width: 380px; margin: 40px auto; }
label { display: block; margin-bottom: 14px; font-size: .9rem; color: var(--muted); }
input, select { display: block; width: 100%; margin-top: 4px; padding: 10px 12px; font: inherit;
                color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
textarea { display: block; width: 100%; margin: 4px 0 12px; padding: 10px 12px; font-size: .95rem;
           color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 8px; resize: vertical; }
[hidden] { display: none !important; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row input, .row select { flex: 1 1 200px; width: auto; margin: 0; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 0 12px; align-items: end; }
.grid3 .btn { margin-bottom: 14px; }
.btn { display: inline-block; background: var(--brand); color: var(--brand-text); border: 0;
       border-radius: 8px; padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer;
       text-decoration: none; white-space: nowrap; }
.btn.small { padding: 5px 10px; font-size: .85rem; }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); }
.btn.warn { background: var(--warn); color: #fff; }
.btn.danger { background: transparent; color: var(--err); border: 1px solid var(--line); }
.inline { display: inline; }
.msg { padding: 10px 14px; border-radius: 8px; margin: 12px 0; }
.msg.ok { background: var(--ok-bg); color: var(--ok); }
.msg.err { background: var(--err-bg); color: var(--err); }
.msg.big { padding: 20px; font-size: 1.05rem; }
.mono { font-family: ui-monospace, Consolas, "Courier New", monospace; }
.result { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 16px;
          padding: 14px; border-radius: 8px; background: var(--ok-bg); }
.result .label { color: var(--muted); font-size: .9rem; width: 100%; }
.result .key { font-size: 1.8rem; font-weight: 700; letter-spacing: 2px; color: var(--ok); }
.hint { color: var(--muted); font-size: .9rem; }
.bad { color: var(--err); }
.filebox { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 12px;
           max-height: 300px; overflow: auto; font-size: .9rem; tab-size: 4; }
.scroll { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: .92rem; }
table.list th, table.list td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.list th { color: var(--muted); font-weight: 600; }
.actions { white-space: nowrap; }
.actions .btn { margin: 2px 0; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: .8rem; font-weight: 600; }
.tag.active { background: var(--ok-bg); color: var(--ok); }
.tag.blocked { background: var(--err-bg); color: var(--err); }
.tag.admin { background: var(--line); color: var(--text); }
.row input { min-width: 0; }
@media (max-width: 600px) {
  .actions { white-space: normal; }
  .row input, .row select { flex-basis: 100%; }
  .btn { white-space: normal; max-width: 100%; overflow-wrap: anywhere; }
  .result .key { font-size: 1.5rem; }
}