/* AuthCard and ProviderButtons geometry from the staff admin sign-in. */
:root {
  color-scheme: dark;
  --canvas: #09080e;
  --surface: rgba(11, 14, 16, .88);
  --text: #f3f6f5;
  --line: rgba(222, 232, 236, .22);
  --provider-line: rgba(190, 221, 205, .22);
  --provider-hover: rgba(190, 221, 205, .45);
  --provider-bg: rgba(7, 17, 12, .24);
  --hover-bg: rgba(255, 255, 255, .03);
  --accent: #a594ff;
  --badge-bg: rgba(165, 148, 255, .08);
  --badge-line: rgba(165, 148, 255, .2);
  --shadow: rgba(0, 0, 0, .45);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.auth-screen { min-height: 100vh; min-height: 100svh; display: grid; grid-template-rows: 72px 1fr 56px; }
.auth-top { display: flex; align-items: center; padding: 0 clamp(20px, 4vw, 48px); }
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand img { width: 112px; height: auto; display: block; filter: invert(1) hue-rotate(180deg); }
.brand-sep { width: 1px; height: 16px; background: var(--line); }
.brand-product {
  color: var(--accent);
  background: var(--badge-bg);
  border: 1px solid var(--badge-line);
  border-radius: 999px;
  padding: 4px 9px;
  font: 10px ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.auth-main { display: grid; place-content: center; justify-items: center; padding: 24px 16px 40px; }
.auth-card {
  width: min(420px, calc(100vw - 32px));
  padding: 34px 32px 28px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: 0 40px 100px var(--shadow);
  animation: rise .55s cubic-bezier(.2, .7, .2, 1) both;
}
.auth-title { margin: 0; font-size: 26px; letter-spacing: -.03em; line-height: 1.2; text-align: center; font-weight: 500; }
.auth-body { margin-top: 26px; }
.providers { display: grid; gap: 10px; }
.provider {
  display: grid;
  grid-template-columns: 22px 1fr 16px;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 16px;
  border: 1px solid var(--provider-line);
  border-radius: 999px;
  background: var(--provider-bg);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: border-color .2s, background .2s;
}
.provider span { text-align: center; }
.provider:hover { border-color: var(--provider-hover); background: var(--hover-bg); }
.provider:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .auth-card { animation: none; } .provider { transition: none; } }
@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --canvas: #f8f7fc;
    --surface: #ffffff;
    --text: #0e1412;
    --line: rgba(20, 40, 32, .18);
    --provider-line: rgba(20, 40, 32, .22);
    --provider-hover: rgba(20, 40, 32, .45);
    --provider-bg: #ffffff;
    --hover-bg: rgba(16, 24, 20, .03);
    --accent: #5b3fd9;
    --badge-bg: rgba(91, 63, 217, .08);
    --badge-line: rgba(91, 63, 217, .2);
    --shadow: rgba(16, 24, 20, .099);
  }
  .brand img { filter: none; }
}