:root {
  --ink: #14213d;
  --ink-soft: #3d4a66;
  --paper: #f7f5f0;
  --card: #ffffff;
  --line: #e2ddd2;
  --accent: #b5452b;
  --error: #a3261b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eef0f5;
    --ink-soft: #b8bfcf;
    --paper: #11151f;
    --card: #1a2030;
    --line: #2c3447;
    --accent: #e0775c;
    --error: #ff8a7a;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}
body.center { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 16px; }
.panel {
  width: 100%; max-width: 440px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 32px 28px;
}
.brand { font-weight: 700; font-size: 1.2rem; letter-spacing: -0.01em; margin-bottom: 20px; }
.brand span { color: var(--accent); }
.topline { display: flex; justify-content: space-between; align-items: baseline; }
h1 { font-size: 1.6rem; letter-spacing: -0.01em; margin-bottom: 8px; }
.muted { color: var(--ink-soft); font-size: 0.97rem; }
.error { color: var(--error); font-weight: 600; margin-top: 16px; }
form { margin-top: 20px; display: grid; gap: 8px; }
label { font-weight: 600; font-size: 0.9rem; }
input {
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--line); border-radius: 6px; padding: 10px 12px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  margin-top: 8px; font: inherit; font-weight: 600; cursor: pointer;
  background: var(--ink); color: var(--paper); border: 0; border-radius: 6px; padding: 11px 14px;
}
.notice { margin-top: 24px; font-size: 0.82rem; color: var(--ink-soft); border-left: 3px solid var(--line); padding-left: 10px; }
.agent { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 0.88rem; color: var(--ink-soft); }
.agent strong { color: var(--ink); }
a, .link { color: var(--accent); }