body{ margin:0; background:#0f172a; color:#fff; font-family:'Inter',sans-serif; min-height:100vh; display:flex; justify-content:center; align-items:center; padding:20px; }
.auth-container{ width:100%; max-width:520px; padding:15px; }
.auth-card{ background:#1e293b; border:1px solid #334155; border-radius:14px; padding:35px; box-shadow:0 20px 50px rgba(0,0,0,.45); }
.form-control, select{ background:#0f172a !important; border:1px solid #475569 !important; color:#fff !important; }
.form-control:focus, select:focus{ box-shadow:none !important; border-color:#38bdf8 !important; }
.form-label{ font-size:.8rem; margin-bottom:6px; }
.btn-auth{ width:100%; background:#0284c7; color:#fff; font-weight:700; border:none; padding:12px; border-radius:8px; }
.btn-auth:hover{ background:#0369a1; }
.security-box{ border:1px solid #f59e0b; border-radius:10px; padding:15px; background:rgba(245,158,11,.05); }
.small-link{ font-size:.9rem; }
.hint{ color:#94a3b8; font-size:.75rem; }