:root {
  color-scheme: dark;
  --bg: #121211;
  --surface: #1a1a19;
  --surface-2: #232322;
  --border: #33332f;
  --border-strong: #4a4a45;
  --text: #ededea;
  --accent: #3987e5;
  --critical: #e66767;
}
:root[data-theme='light'] {
  color-scheme: light;
  --bg: #f4f4f1;
  --surface: #ffffff;
  --surface-2: #f0efeb;
  --border: #dcdbd6;
  --border-strong: #b9b8b1;
  --text: #1d1d1b;
  --accent: #2a78d6;
  --critical: #c22f2f;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 ui-sans-serif, system-ui, sans-serif;
}
.wrap { display: flex; min-height: 100%; align-items: center; justify-content: center; padding: 24px; }
.panel { width: 320px; padding: 24px; background: var(--surface); border: 1px solid var(--border); border-radius: 6px; }
h1 { margin: 0 0 4px; font-size: 18px; font-weight: 600; }
label { display: block; margin-bottom: 4px; font-size: 12px; }
.input { width: 100%; min-height: 30px; margin-bottom: 12px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 4px; background: var(--surface); color: var(--text); font: inherit; }
.input:focus { border-color: var(--accent); outline: none; }
.btn { display: inline-flex; width: 100%; min-height: 28px; align-items: center; justify-content: center; padding: 3px 10px; border: 1px solid var(--border); border-radius: 4px; background: var(--surface-2); color: var(--text); font: inherit; cursor: pointer; }
.btn:hover { border-color: var(--border-strong); }
.btn:disabled { cursor: default; opacity: 0.7; }
.message { margin: 12px 0 0; font-size: 12px; color: var(--critical); }