:root { --brand: #6366f1; --dark: #0f0f12; --card: #18181f; --border: #2d2d3a; --text: #e2e8f0; --muted: #94a3b8; }
* { box-sizing: border-box; margin: 0; padding: 0; }
body.auth-body { background: var(--dark); color: var(--text); font-family: 'Inter', system-ui, sans-serif;
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 2rem; }
.auth-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 2.5rem; width: 100%; max-width: 420px; }
.auth-logo { display: block; text-align: center; font-size: 1.25rem; font-weight: 800;
  color: #fff; text-decoration: none; margin-bottom: 1.5rem; }
.auth-card h1 { font-size: 1.5rem; font-weight: 700; text-align: center; color: #fff; margin-bottom: .35rem; }
.auth-sub { text-align: center; color: var(--muted); font-size: .875rem; margin-bottom: 2rem; }
.auth-error { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.25); color: #fca5a5;
  padding: .75rem 1rem; border-radius: 8px; font-size: .875rem; margin-bottom: 1.25rem; }
form label { display: block; font-size: .875rem; color: var(--muted); margin-bottom: 1rem; font-weight: 500; }
form label input { display: block; width: 100%; margin-top: .35rem; padding: .7rem 1rem;
  background: var(--dark); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 1rem; font-family: inherit; outline: none; transition: border-color .2s; }
form label input:focus { border-color: var(--brand); }
form label input::placeholder { color: #475569; }
.btn-auth { width: 100%; padding: .85rem; background: var(--brand); color: #fff;
  border: none; border-radius: 10px; font-size: 1rem; font-weight: 700; cursor: pointer;
  margin-top: .5rem; font-family: inherit; transition: opacity .2s; }
.btn-auth:hover { opacity: .88; }
.auth-footer { text-align: center; margin-top: 1.25rem; color: var(--muted); font-size: .875rem; }
.auth-footer a { color: var(--brand); text-decoration: none; font-weight: 600; }