:root {
  --bg: #f5f6f8; --card: #fff; --fg: #1d2330; --muted: #667085; --line: #e4e7ec;
  --accent: #1f6feb; --ok: #2e9e44; --err: #d7301f; --radius: 10px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 14px; color: var(--fg);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); }
a { color: var(--accent); }
h1 { font-size: 18px; margin: 0; }
h2 { font-size: 15px; margin: 0 0 8px; }
.hint { color: var(--muted); font-size: 13px; margin: 4px 0 10px; }
.err { color: var(--err); min-height: 1.2em; }

.top { display: flex; align-items: center; gap: 16px; padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 2; flex-wrap: wrap; }
.spacer { flex: 1; }
nav { display: flex; gap: 4px; }
nav button, .buttons button { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 12px; font: inherit; cursor: pointer; color: var(--fg); }
nav button.active, .buttons button.active { background: var(--fg); color: #fff; border-color: var(--fg); }
button.link { border: 0; background: none; color: var(--accent); font: inherit; cursor: pointer; padding: 0; }
.btn { border: 0; background: var(--accent); color: #fff; border-radius: 8px; padding: 8px 14px; font: inherit; cursor: pointer; }
.btn.secondary { background: #fff; color: var(--fg); border: 1px solid var(--line); }
.btn.danger { background: var(--err); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

main { max-width: 1100px; margin: 0 auto; padding: 20px; }
.card { background: var(--card); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; box-shadow: 0 1px 2px rgba(16,24,40,.06); }
.narrow { max-width: 360px; margin: 12vh auto; }
.narrow label { display: block; margin: 16px 0 12px; }
.narrow input { display: block; width: 100%; margin-top: 6px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border-radius: var(--radius); padding: 12px 14px; box-shadow: 0 1px 2px rgba(16,24,40,.06); }
.stat b { display: block; font-size: 22px; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: 12px; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; }

.progress { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; margin: 8px 0; }
.progress div { height: 100%; background: var(--accent); transition: width .5s; }

table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; }

fieldset { border: 0; padding: 0; margin: 0; }
.field { display: grid; grid-template-columns: 260px 1fr; gap: 6px 16px; padding: 10px 0; border-bottom: 1px solid var(--line); align-items: start; }
.field:last-child { border-bottom: 0; }
.field label { font-weight: 500; }
.field .help { grid-column: 2; color: var(--muted); font-size: 12px; }
.field input[type=text], .field input[type=number], .field select { padding: 7px 9px; border: 1px solid var(--line); border-radius: 8px; font: inherit; width: 100%; max-width: 320px; }
.field input.changed, .field select.changed { border-color: var(--accent); background: #f0f6ff; }
.savebar { position: sticky; bottom: 0; background: var(--card); padding: 12px 18px; border-radius: var(--radius); box-shadow: 0 -2px 12px rgba(16,24,40,.08); display: flex; gap: 12px; align-items: center; }

pre#log { margin: 0; white-space: pre-wrap; font-size: 12px; max-height: 70vh; overflow: auto; }
#toast { position: fixed; right: 20px; bottom: 20px; background: var(--fg); color: #fff; padding: 10px 14px; border-radius: 8px; opacity: 0; transition: opacity .2s; pointer-events: none; max-width: 420px; }
#toast.show { opacity: 1; }
#toast.error { background: var(--err); }

@media (max-width: 700px) { .field { grid-template-columns: 1fr; } .field .help { grid-column: 1; } }

#key-form input[type=text] { flex: 1; min-width: 200px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
#key-form input[type=number] { width: 90px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
#key-form .hint { align-self: center; margin: 0; }
#key-new { margin-top: 12px; padding: 12px; background: #ecfdf3; border-radius: 8px; }
#key-new code { display: block; font-size: 15px; padding: 8px; background: #fff; border-radius: 6px; margin: 6px 0; word-break: break-all; user-select: all; }
tr.revoked td { color: var(--muted); text-decoration: line-through; }
tr.revoked td:last-child { text-decoration: none; }