:root {
  --bg: #f2f2f7;
  --surface: #ffffff;
  --border: #e5e5ea;
  --text: #1c1c1e;
  --text-2: #6e6e73;
  --accent: #007aff;
  --accent-hover: #0066d6;
  --red: #ff3b30;
  --red-soft: rgba(255, 59, 48, 0.1);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --border: #38383a;
    --text: #f2f2f7;
    --text-2: #aeaeb2;
    --accent: #0a84ff;
    --accent-hover: #409cff;
    --red: #ff453a;
    --red-soft: rgba(255, 69, 58, 0.16);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, Roboto, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 16px;
}
.login { width: 100%; max-width: 380px; }
.brand { display: flex; align-items: center; gap: 12px; margin: 0 0 20px 4px; }
.brand-name { font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.brand-sub { color: var(--text-2); font-size: 13px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  display: flex;
  flex-direction: column;
}
h1 { font-size: 20px; font-weight: 600; margin: 0 0 4px; letter-spacing: -0.01em; }
.hint { margin: 0 0 20px; color: var(--text-2); font-size: 13px; }
code { font: 12px "SF Mono", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; }
label { font-size: 13px; font-weight: 500; margin-bottom: 6px; }
input {
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 10px;
  font: inherit;
  color: var(--text);
  background: var(--surface);
  margin-bottom: 16px;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }
button {
  height: 36px;
  border: 0;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: var(--accent-hover); }
.error {
  margin: 0 0 16px;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--red-soft);
  color: var(--red);
  font-size: 13px;
  font-weight: 500;
}
.foot { text-align: center; color: var(--text-2); font-size: 12px; margin-top: 16px; }