:root {
  --bg: #0f1419;
  --panel: #1a222c;
  --text: #e8eef5;
  --muted: #8b9aab;
  --accent: #2f6fed;
  --danger: #c44b5a;
  --border: #2a3544;
  --ok: #2f9e6b;
  --warn: #c9a227;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  background: linear-gradient(160deg, #15202b, var(--bg));
  color: var(--text);
  min-height: 100vh;
}
.shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.shell.wide {
  display: block;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 24px 48px;
}
.panel {
  width: min(440px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
}
.shell.wide .panel { width: 100%; margin-bottom: 16px; }
h1, h2, h3 { margin: 0 0 8px; }
.muted { color: var(--muted); font-size: 14px; }
.warn { color: var(--warn); font-size: 14px; }
label { display: block; margin: 14px 0 6px; color: var(--muted); font-size: 13px; }
input, textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: #0f161e;
  color: var(--text);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
}
textarea { font-family: Consolas, monospace; resize: vertical; }
button {
  appearance: none;
  border: 0;
  border-radius: 10px;
  min-height: 44px;
  padding: 0 16px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 12px;
}
button.primary { background: var(--accent); color: #fff; width: 100%; }
button.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
button.danger { background: var(--danger); color: #fff; }
button.tab {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  margin: 0;
  min-height: 36px;
}
button.tab.active { color: var(--text); border-color: var(--border); background: #121820; }
.msg { min-height: 20px; margin-top: 10px; font-size: 14px; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--ok); }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.top nav { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.top-login {
  border-bottom: 1px solid transparent;
  background: transparent;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
}
.lang-switch {
  display: inline-flex;
  gap: 4px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #121820;
}
.lang-btn {
  margin: 0;
  min-height: 32px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 600;
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
}
.lang-btn.active {
  background: var(--accent);
  color: #fff;
}
.hidden { display: none !important; }
.stats { display: flex; gap: 16px; flex-wrap: wrap; margin: 16px 0; }
.stats div {
  background: #121820;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  min-width: 140px;
}
.row { display: flex; gap: 8px; margin-bottom: 12px; }
.row input { flex: 1; }
.row-fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.result, .exists {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #121820;
}
.result dl { display: grid; grid-template-columns: 140px 1fr; gap: 6px 12px; font-size: 14px; }
.result dt { color: var(--muted); }
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 50;
}
.modal-card {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
}
.mfa-qr-wrap {
  display: flex;
  justify-content: center;
  margin: 14px 0;
  padding: 12px;
  background: #fff;
  border-radius: 12px;
  width: fit-content;
  max-width: 100%;
}
.mfa-qr {
  display: block;
  width: 240px;
  height: 240px;
  image-rendering: pixelated;
}
@media (max-width: 720px) {
  .row-fields { grid-template-columns: 1fr; }
  .result dl { grid-template-columns: 1fr; }
}