/* Standalone login page — minimal, dark-friendly, mobile-first. */
:root {
  color-scheme: light dark;
  --bg: #0e1116;
  --card: #161b22;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #2f81f7;
  --error: #f85149;
  --border: #30363d;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f8fa;
    --card: #ffffff;
    --fg: #1f2328;
    --muted: #57606a;
    --accent: #0969da;
    --error: #cf222e;
    --border: #d0d7de;
  }
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  height: 100%;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem 1.75rem;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}
.brand {
  margin: 0 0 0.25rem;
  font-size: 1.5rem;
  letter-spacing: 0.01em;
}
.muted {
  color: var(--muted);
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
}
form {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
input[type="text"],
input[type="password"] {
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.65rem 0.8rem;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
input:focus {
  border-color: var(--accent);
}
button {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  padding: 0.7rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  margin-top: 0.4rem;
  transition: filter 0.15s;
}
button:hover {
  filter: brightness(1.1);
}
button:active {
  filter: brightness(0.95);
}
.error {
  color: var(--error);
  font-size: 0.9rem;
  padding: 0.4rem 0;
}
.hidden { display: none !important; }