feat(auth): estrategia multicanal (WebControl + Google/Facebook + MariaDB Staff) y rediseño de login con mascota bot

public/css/style.css

@@ -249,3 +249,118 @@ main {
     transform: translateY(-1px);
 }
 
+/* ==============================================================================
+   Segmented Tabs & Social Buttons for Multi-Channel Login
+   ============================================================================== */
+.login-segmented-tabs {
+    display: flex;
+    background: #f1f5f9;
+    border-radius: 14px;
+    padding: 5px;
+    margin-bottom: 1.5rem;
+    gap: 6px;
+}
+
+.login-tab-btn {
+    flex: 1;
+    border: none;
+    background: transparent;
+    padding: 0.65rem 0.85rem;
+    border-radius: 10px;
+    font-size: 0.88rem;
+    font-weight: 600;
+    color: #64748b;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 8px;
+    cursor: pointer;
+}
+
+.login-tab-btn:hover {
+    color: #0f172a;
+}
+
+.login-tab-btn.active {
+    background: #ffffff;
+    color: #0284c7;
+    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
+}
+
+.login-tab-btn.active.staff-active {
+    color: #4f46e5;
+}
+
+.login-divider {
+    display: flex;
+    align-items: center;
+    text-align: center;
+    margin: 1.5rem 0 1rem;
+    color: #94a3b8;
+    font-size: 0.76rem;
+    text-transform: uppercase;
+    letter-spacing: 0.06em;
+    font-weight: 600;
+}
+
+.login-divider::before,
+.login-divider::after {
+    content: '';
+    flex: 1;
+    border-bottom: 1px solid #e2e8f0;
+}
+
+.login-divider:not(:empty)::before {
+    margin-right: .75em;
+}
+
+.login-divider:not(:empty)::after {
+    margin-left: .75em;
+}
+
+.btn-social-fb {
+    border: 1px solid #cbd5e1;
+    background: #ffffff;
+    color: #1877f2;
+    font-weight: 600;
+    font-size: 0.9rem;
+    border-radius: 12px;
+    padding: 0.65rem 1rem;
+    transition: all 0.2s ease;
+    text-decoration: none;
+}
+
+.btn-social-fb:hover {
+    background: #f0f6ff;
+    border-color: #1877f2;
+    color: #0c56be;
+}
+
+.staff-badge-pill {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    background: rgba(79, 70, 229, 0.1);
+    color: #4f46e5;
+    border: 1px solid rgba(79, 70, 229, 0.2);
+    border-radius: 9999px;
+    padding: 0.25rem 0.65rem;
+    font-size: 0.75rem;
+    font-weight: 600;
+}
+
+.client-badge-pill {
+    display: inline-flex;
+    align-items: center;
+    gap: 6px;
+    background: rgba(2, 132, 199, 0.1);
+    color: #0284c7;
+    border: 1px solid rgba(2, 132, 199, 0.2);
+    border-radius: 9999px;
+    padding: 0.25rem 0.65rem;
+    font-size: 0.75rem;
+    font-weight: 600;
+}
+
+